| Version 148 (modified by , 13 years ago) ( diff ) |
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Summary
MOPS has reported some peculiar magnitudes in y-band MD data offsets and larger scatter compared to predictions of asteroid y-band magnitudes while the same comparison to 3PI photometry looks reasonable (both cases are photometry from the respective diffims). Also, have found photometry from Warp-Stack (WS) difference images for two sequential MD exposures unrealistically different by >0.5 mag.
Plot of average value for (observed - predicted) magnitudes per night for 3pi and MD detections in y-band.An offset in the MD data making objects ~0.4 mag brighter is seen.
Plot of average value for (observed - predicted) magnitudes per night for 3pi and MD detections in z-band. No offset is seen.
Issue of PSF photometry scatter
The MD10 sequential exposure pair, asteroid (12891) example was used to trace through the code to identify problems. The camera SMF exposure photometry was taken as the "true" target photometry to achieve from the diffim photometry. Offset of exposure photometry to some predicted/expected magnitude is a different problem altogether.
Key problem -- coordinate list for determining PSF was a matched+merged list of both the input and reference image rather than just a matched list (poor PSF resulting in 0.3+ irregular mag). When the list is sorted by inst_flux and the top hardcoded 500 sources are used, ones that are not in the input warp from masking etc reduce the available "good" sources. Normally that is only a small fraction, but when a deeper refstack is used the missing sources have a much higher inst_flux and begin to dominate the set for determining the PSF making for a poor solution. Newer MD refstacks have been much deeper, some fields before (and typically in y-band) had only order 10-20 inputs, and now have 60-100.
- however, there was a specific routine (pmSourceMatchMerge) added for ppSub to make the merged list. Really the specific input list should be used and not a mix (match/merge) of both, even for the stamp selection, but the input source lists are combined into a master detection list.
Various other minor(?) issues identified:
- background binning for photometry on diffims has not been the same as other photometry (~0.1-0.2 offset mag) -- using 128 for now, may need additional/proper tuning
- psphot trace level >5 modifies the photometry output -- not operation still to be fixed
- refConv outputs aren't needed since magic not used -- turning off in gpc1/psphot.config
- This output highlighted another possible problem in the COMP_WT output where the range is insufficient and cores of moderately bright sources are clipped to NAN -- unknown extent or if critial and how to fix
- ppSub missing -threads option in help -- to be fixed
- sometimes a check is made for a single input list of sources (input or ref) and allowed with the one provided being the master source list, other places if either doesn't exist then ppSub exits so that sources for both must be provided -- unclear if one source list is acceptable for all parts, still to be addressed
- REVERSE is wanted as a command line argument and not defined for choosing if the input or the reference is used to determine the PSF for photometry on the diffim -- ever necessary?
- is convolved refstack really necessary here or would the unconvolved stack be better (basically the refstack is just sky for moving objects but for other transient science may want unconvolved) as the unconvolved stack is typically of better FWHM and requires less deconvolution to the warp seeing -- needs to be investigated further
- psphot run on diffim compared to ppSub photometry does not necessarily agree -- unclear still if config/setup or actual problem/bug
For results using only a matched list and a background binning, see MD_WSdiffim_photcheck_test20121004
Issue of photometry offset
Exposure (SMF) photometry versus diffim photometry: unless the target is contaminated with background (self or host), photometry at the exposure level will be the better choice for photometry. However, will look at the MD09 example since it covers past/present, most warps are still available (MD09 is the current test field) and does not appear intrinsically variable (MD_WSdiffim_photcheck_test20121004).
- appears to be an offset of ~0.08 mag in the PSF photometry on the diffims (PSF mag brighter) and from the ppSub photometry
- photometric error on the diffims is ~30% larger on the WARP-STACK(convolved -- default for MOPS) versus the WARP-STACK(unconvolved -- default for static transients)
Predicted/expected photometry versus exposure photometry: beyond the scope of diffim photometry investigation.
Example: MD10 sequential exposure pair, asteroid (12891) (Peter Vereš)
o6157g0218o o6157g0219o ra: 353.142622 ra: 353.142215 dec:-0.086658 dec: -0.086867
Chip/camera CAL_PSF_MAG photometry from the SMF catalogs below agree to what expected? yes, but can't be more exact because asteroid (12891) previously unstudied.
- o6157g0218o: 17.06
- o6157g0219o: 17.048
camera SMFs (from tag ipp-20120802):
IPP_IDET CAL_PSF_MAG CAL_PSF_MAG_SIG PSF_INST_MAG PSF_INST_MAG_SIG AP_MAG PSF_MAJOR PSF_QF_PERFECT FLAGS FLAGS2 rsep(")
2384872506.gpc1:MD10.nt:2012:08:18:o6157g0218o.512581:o6157g0218o.512581.cm.524588.smf XY41
00300 17.064 0.116 -12.201 0.011 -12.243 6.285 0.999 0x06200005 0x00000080 0.03
2384878611.gpc1:MD10.nt:2012:08:18:o6157g0219o.512582:o6157g0219o.512582.cm.524591.smf XY31
00353 17.048 0.120 -12.215 0.011 -12.221 6.292 0.999 0x06200005 0x00000080 0.02
WSdiff CMFs (from tag ipp-20120802):
IPP_IDET CAL_PSF_MAG CAL_PSF_MAG_SIG PSF_INST_MAG PSF_INST_MAG_SIG AP_MAG PSF_MAJOR PSF_QF_PERFECT FLAGS FLAGS2 DIFF_NRATIO_BAD rsep (")
---- o6157g0218o
2385003229.gpc1:MD10.nightlyscience:2012:08:18:MD10.V3:skycell.052:MD10.V3.skycell.052.WS.dif.272923.cmf
00180 17.159 0.000 -12.106 0.055 -12.059 6.915 0.999 0x02200001 0x00000881 0.59 0.00
---- o6157g0219o
2385006586.gpc1:MD10.nightlyscience:2012:08:18:MD10.V3:skycell.052:MD10.V3.skycell.052.WS.dif.272924.cmf
00143 16.543 0.000 -12.720 0.051 -12.072 10.512 0.999 0x02200001 0x00000081 0.61 0.00
- AP_MAG close between the two exposures (~0.013, ok) but largely offset from SMF ~0.2 (fainter, not ok). Also seems like the target conv may be poor and a large difference in psf_major (ref is conv so target source not in ref since mover and unclear what is driving the PSF poorly)
manually running psphot on input warps
- appears to be an issue with psphot and debug options triggered @level 6, re-run to use normal ops build w/o trace or with values <6
- original warp CMF, transformed photometry in warps from SMF -- should be same as SMF and it is
IPP_IDET CAL_PSF_MAG CAL_PSF_MAG_SIG PSF_INST_MAG PSF_INST_MAG_SIG AP_MAG AP_MAG_RAW PSF_MAJOR PSF_QF_PERFECT FLAGS FLAGS2 DIFF_NRATIO_BAD rsep(") ---- o6157g0218o 00486 17.064 0.000 -12.201 0.011 -12.243 nan nan 0.999 0x06200005 0x00000000 0.03 ---- o6157g0218o 00473 17.048 0.000 -12.215 0.011 -12.221 nan nan 0.999 0x06200005 0x00000000 0.02
- basic psphot run with current ipp-20121026 tag, random seed -- similar except exposure 0219 is different by ~0.035 mag (0218 offset by ~0.014). seems larger than should be..
IPP_IDET CAL_PSF_MAG CAL_PSF_MAG_SIG PSF_INST_MAG PSF_INST_MAG_SIG AP_MAG AP_MAG_RAW PSF_MAJOR PSF_QF_PERFECT FLAGS FLAGS2 rsep ---- o6157g0218o 00379 17.050 0.000 -12.215 0.011 -12.233 -12.237 6.610 0.999 0x06200005 0x00000080 0.03 ---- o6157g0219o 00380 17.081 0.000 -12.181 0.011 -12.186 -12.191 6.376 0.999 0x06200005 0x00000080 0.02
- psphot run with old ipp-20120802 tag, random seed (-seed 8568951837626357297) -- similar to previous tag with exposure 0218 w/in ~0.01 but now exposure 0219 has even smaller offset
---- o6157g0218o 00379 17.057 0.000 -12.208 0.011 -12.245 -12.250 6.434 0.999 0x06200005 0x00000080 0.03 ---- o6157g0219o 00381 17.080 0.000 -12.183 0.011 -12.192 -12.196 6.445 0.999 0x06200005 0x00000080 0.02
- psphot run with current ipp-20121026 tag using the same seed as the run with ipp-20120802 tag -- with same seed, mags mostly match between tags (hope so).
---- o6157g0218o 00379 17.057 0.000 -12.208 0.011 -12.245 -12.250 6.434 0.999 0x06200005 0x00000080 0.03 ---- o6157g0219o 00381 17.079 0.000 -12.184 0.011 -12.192 -12.196 6.445 0.999 0x06200005 0x00000080 0.02
- psphot run with last year ipp-20110622 tag using the same seed as the prior psphot run with ipp-20120802 tag: again similar AP_MAG but PSF_INST_MAG offset by ~0.01-0.02, flags for exposure 0218 also different, PSF_MAJOR also different.
---- o6157g0218o 00393 17.070 0.000 -12.195 0.011 -12.246 -12.250 4.303 0.999 0x06200045 0x00000080 0.03 ---- o6157g0219o 00406 17.057 0.000 -12.206 0.011 -12.192 -12.196 4.431 0.999 0x06200005 0x00000080 0.02
manually re-running WSdiffims
- psphot trace level >5 until bug not a problem in ppSub
- conv direction correct? (default is conv refstack) Yes according the inputs from ppSub logs (conv refstack only, unconv better by ~1 pixel), and Kron R measure appears similar on resampled warp to SMF PSF size.
---- o6157g0218o Input FWHM: 9.713536 Reference FWHM: 4.809747 Kron Radii vs FWHMs 1: fwhm: 9.713536, kron 7.794752 Kron Radii vs FWHMs 2: fwhm: 4.809747, kron 4.897604 ---- o6157g0219o Input FWHM: 9.825516 Reference FWHM: 4.809747 Kron Radii vs FWHMs 1: fwhm: 9.825516, kron 7.951603 Kron Radii vs FWHMs 2: fwhm: 4.809747, kron 4.905538
- with similar ipp-20120802 tag and new seed (conv + unconv refstack): conv/unconv are close and the difference between exposures is smaller ~0.4 vs 0.6 but maybe not in the proper direction, the PSF_ offset from SMF is still ~0.5 (brighter). AP_MAG similar to orig diffim and offset from SMF ~0.2 mag (fainter).
IPP_IDET CAL_PSF_MAG CAL_PSF_MAG_SIG PSF_INST_MAG PSF_INST_MAG_SIG AP_MAG PSF_MAJOR PSF_QF_PERFECT FLAGS FLAGS2 DIFF_NRATIO_BAD rsep --- o6157g0218o (conv and unconv) 00146 16.892 0.000 -12.373 0.055 -12.050 8.657 0.999 0x02200001 0x00000881 0.59 0.02 00197 16.774 0.000 -12.491 0.032 -12.050 8.802 0.999 0x02200001 0x00000081 0.59 0.01 --- o6157g0219o (conv and unconv) 00139 16.493 0.000 -12.770 0.052 -12.070 11.301 0.999 0x02200001 0x00000081 0.62 0.01 00176 16.465 0.000 -12.798 0.025 -12.020 11.069 0.999 0x02200001 0x00000081 0.60 0.01
- with more current ipp-20121026 tag, new and same seed as original WSdiff (default conv refstack always unless noted):
IPP_IDET CAL_PSF_MAG CAL_PSF_MAG_SIG PSF_INST_MAG PSF_INST_MAG_SIG AP_MAG AP_MAG_RAW PSF_MAJOR PSF_QF_PERFECT FLAGS FLAGS2 DIFF_NRATIO_BAD rsep --- o6157g0218o (new, new and original seed) 00100 16.698 0.000 -12.567 0.053 -12.058 -12.099 9.068 0.999 0x02200001 0x00000081 0.59 0.01 00157 16.991 0.000 -12.274 0.054 -12.058 -12.096 7.047 0.999 0x02200001 0x00000881 0.59 0.01 00180 17.159 0.000 -12.106 0.055 -12.059 -12.095 6.915 0.999 0x02200001 0x00000881 0.59 0.00 --- o6157g0219o (new, new and original seed) 00143 16.518 0.000 -12.745 0.051 -12.056 -12.093 10.469 0.999 0x02200001 0x00000081 0.61 0.00 00146 16.515 0.000 -12.748 0.050 -12.070 -12.106 10.707 0.999 0x02200001 0x00000081 0.61 0.00 00143 16.543 0.000 -12.720 0.051 -12.072 -12.106 10.512 0.999 0x02200001 0x00000081 0.61 0.00
- with older ipp-20110622 tag and new seed that was active when photometry "looked better" last year (see example mag plot for TNO145452 below): clearly something changed since with the PSF measure, the difference is smaller ~0.1 mag but the offset from the SMF is larger 0.3 (fainter).
IPP_IDET CAL_PSF_MAG CAL_PSF_MAG_SIG PSF_INST_MAG PSF_INST_MAG_SIG AP_MAG PSF_MAJOR PSF_QF_PERFECT FLAGS FLAGS2 DIFF_NRATIO_BAD rsep --- o6157g0218o -- 00170 16.837 0.000 -12.428 0.053 -inf 5.545 0.999 0x02200001 0x00000081 0.59 0.11 --- o6157g0219o -- 00164 16.727 0.000 -12.536 0.051 -inf 5.761 0.999 0x02200001 0x00000081 0.61 0.09
- with more current ipp-20121026 tag and changing the PPSUB:PSPHOT PSF_MODEL from PS_MODEL_PS1_V1 to PS_MODEL_GAUSS -- model seems to also change the AP_MAG, and closer to what is should be (~0.1 mag offset now)
IPP_IDET CAL_PSF_MAG CAL_PSF_MAG_SIG PSF_INST_MAG PSF_INST_MAG_SIG AP_MAG AP_MAG_RAW PSF_MAJOR PSF_QF_PERFECT FLAGS FLAGS2 DIFF_NRATIO_BAD rsep --- o6157g0218o (new seed, new seed, same seed as original WSdiff) 00081 17.142 0.000 -12.123 0.055 -12.100 -12.100 10.658 1.000 0x02200001 0x00000881 0.60 0.00 00157 16.991 0.000 -12.274 0.054 -12.058 -12.096 7.047 0.999 0x02200001 0x00000881 0.59 0.01 00081 17.185 0.000 -12.081 0.053 -12.095 -12.095 9.102 1.000 0x02200001 0x00000881 0.59 0.00 --- o6157g0219o (new seed, new seed, same seed as above) 00085 17.188 0.000 -12.075 0.050 -12.105 -12.107 11.527 1.000 0x02200001 0x00000881 0.62 0.02 00067 17.054 0.000 -12.209 0.050 -12.107 -12.109 9.943 1.000 0x02200001 0x00000881 0.62 0.02 00085 17.160 0.000 -12.103 0.050 -12.105 -12.106 9.236 1.000 0x02200001 0x00000881 0.62 0.02
- o6157g0218o change BACKGROUND.XBIN,YBIN from 32 to -- 128 much closer SMF/warp AP_MAG but offset continues on at 256 up to ~400. psf_major all over
-- 128: same ppSub seed, other ppSub seed 00175 17.110 0.000 -12.156 0.054 -12.253 -12.290 6.915 0.999 0x02200001 0x00000881 0.63 0.00 00119 16.602 0.000 -12.663 0.056 -12.217 -12.255 12.361 0.999 0x02200001 0x00000081 0.63 0.01 00116 16.585 0.000 -12.680 0.056 -12.237 -12.274 12.260 0.999 0x02200001 0x00000081 0.64 0.01 00192 17.009 0.000 -12.256 0.054 -12.232 -12.274 7.333 0.999 0x02200001 0x00000881 0.63 0.01 00169 17.112 0.000 -12.153 0.056 -12.240 -12.276 6.915 0.999 0x02200001 0x00000881 0.63 0.00 00127 16.535 0.000 -12.731 0.052 -12.211 -12.259 10.990 0.999 0x02200001 0x00000081 0.62 0.01 -- 256: same ppSub seed, other ppSub seed 00178 17.097 0.000 -12.168 0.053 -12.327 -12.364 6.915 0.999 0x02200001 0x00000881 0.65 0.00 00122 16.591 0.000 -12.674 0.055 -12.262 -12.300 12.307 0.999 0x02200001 0x00000081 0.64 0.01 00117 16.980 0.000 -12.285 0.055 -12.278 -12.325 7.746 0.999 0x02200001 0x00000881 0.64 0.01 00108 17.006 0.000 -12.259 0.054 -12.278 -12.322 8.638 0.999 0x02200001 0x00000881 0.64 0.01 -- 400: same ppSub seed, other ppSub seed 00177 17.103 0.000 -12.162 0.054 -12.292 -12.329 6.915 0.999 0x02200001 0x00000881 0.64 0.00 00153 17.188 0.000 -12.077 0.054 -12.301 -12.351 9.547 0.999 0x02200001 0x00000881 0.65 0.01 00142 17.174 0.000 -12.091 0.055 -12.313 -12.359 6.878 0.999 0x02200001 0x00000881 0.65 0.01 00149 17.010 0.000 -12.255 0.052 -12.332 -12.370 6.956 0.999 0x02200001 0x00000881 0.65 0.01 00149 16.567 0.000 -12.698 0.051 -12.290 -12.332 9.998 0.999 0x02200001 0x00000081 0.64 0.01
manually running psphot on WSdiffim
exp_name=o6157g0218o, diff_id=272923, using ppSub output PSF -- found PSF was poorly determined so PSF_MAG not right here and focus is on AP_MAG
- with PSPHOT DIFF recipe option (key difference is setting BACKGROUND.XBIN/YBIN 32, not 400) for AP_MAG
--- same ppSub seed 00218 18.355 0.000 -10.910 0.056 -11.881 -11.948 6.915 0.999 0x02200001 0x00000080 0.04 --- set XBIN/YBIN 128 -- same ppSub seed, random, random, random 00184 18.290 0.000 -10.975 0.055 -12.035 -12.102 6.915 0.999 0x02200001 0x00000080 0.04 00186 18.295 0.000 -10.970 0.056 -12.003 -12.069 6.915 0.999 0x02200001 0x00000080 0.04 00185 18.286 0.000 -10.979 0.055 -12.056 -12.123 6.915 0.999 0x02200001 0x00000080 0.04 00185 18.291 0.000 -10.974 0.056 -12.033 -12.099 6.915 0.999 0x02200001 0x00000080 0.04 --- set to 6400 (full skycell so constant), same seed 00181 18.294 0.000 -10.971 0.056 -12.002 -12.069 6.915 0.999 0x02200001 0x00000080 0.04
- w/o PSPHOT DIFF recipe option
--- same ppSub seed, random, random, random 00190 18.323 0.000 -10.943 0.055 -12.010 -12.076 6.915 0.999 0x02200001 0x00000080 0.04 00190 18.292 0.000 -10.973 0.056 -11.996 -12.063 6.915 0.999 0x02200001 0x00000080 0.04 00191 18.284 0.000 -10.981 0.055 -12.067 -12.133 6.915 0.999 0x02200001 0x00000080 0.04 00189 18.286 0.000 -10.979 0.055 -12.066 -12.133 6.915 0.999 0x02200001 0x00000080 0.04
manually re-running WSdiffims with fix-A
Defining fix-A to be
- BACKGROUND.XBIN,YBIN changed from 32->128
- using a match list for PSF determination and not a match+merge list
- with more current tag/trunk with fix (201302xx), new and same seed as original WSdiff (default conv refstack always unless noted) -- while AP_MAG similar with background bin change, PSF_MAG still offset ~0.1 mag
IPP_IDET CAL_PSF_MAG CAL_PSF_MAG_SIG PSF_INST_MAG PSF_INST_MAG_SIG AP_MAG AP_MAG_RAW PSF_MAJOR PSF_QF_PERFECT FLAGS FLAGS2 DIFF_NRATIO_BAD rsep --- o6157g0218o (original seed, random 3x) 00164 16.928 0.000 -12.337 0.051 -12.230 -12.232 6.175 0.999 0x06a04007 0x00000881 0.68 0.01 00160 16.928 0.000 -12.337 0.052 -12.235 -12.238 6.166 0.999 0x06a04007 0x00000881 0.69 0.01 00162 16.932 0.000 -12.333 0.053 -12.222 -12.224 6.190 0.999 0x06a04007 0x00000881 0.68 0.01 00162 16.890 0.000 -12.375 0.052 -12.229 -12.231 6.413 0.999 0x06a04007 0x00000881 0.68 0.01 --- o6157g0219o (original seed, random 3x) 00164 16.893 0.000 -12.369 0.048 -12.247 -12.251 6.331 0.999 0x06a04007 0x00000881 0.68 0.00 00167 16.883 0.000 -12.380 0.046 -12.241 -12.245 6.433 0.999 0x06a04007 0x00000881 0.68 0.00 00165 16.906 0.000 -12.356 0.049 -12.227 -12.229 6.289 0.999 0x06a04007 0x00000881 0.69 0.00 00163 16.882 0.000 -12.381 0.049 -12.235 -12.239 6.488 0.999 0x06a04007 0x00000881 0.68 0.00
- manually run psphot on WSdiffim with ppSub PSF and seed using fix-A
--- simple run, default options - 00176 17.852 0.000 -11.413 0.052 -12.206 -12.214 6.175 0.999 0x02200001 0x00000080 0.03 --- adding recipe PSPHOT DIFF option -- similar to ppSub result now, ppSub PSF properly determined now 00165 16.932 0.000 -12.333 0.052 -12.221 -12.229 6.175 0.999 0x06a04007 0x00000080 0.04
- aside: running psphot on warp using the recipe PSPHOT DIFF option -- oddly PSF_MAG similar to ppSub
--- normally determines own PSF since warp (seed, random) -- 00381 16.918 0.000 -12.347 0.011 -12.179 -12.183 6.335 0.999 0x06a04007 0x00000080 0.02 00381 16.903 0.000 -12.362 0.011 -12.234 -12.238 6.360 0.999 0x06a04007 0x00000080 0.02 --- using ppSub PSF (seed) 00376 16.942 0.000 -12.323 0.011 -12.166 -12.174 6.175 0.999 0x06a04007 0x00000080 0.04
problems tracing out
- psphot debug trace level >5 photometry different
--- tiggered in psphotDumpPSFStars with pmModelSub (source->pixels, source->maskObj, source->modelPSF, PM_MODEL_OP_FULL, maskVal);
- diffphot AP_MAG offset ~0.2 brighter than SMF/warp (-12.05 diff, -12.25 smf/warp)
--- influenced by gpc1/psphot.config DIFF option BACKGROUND.XBIN,YBIN at 32 when default psphot is 400
- diffphot PSF_INST mag offset and unstable (as is psf_major) -- +/- 0.3+ mag (6.9--12.3 pixels)
- traced to input list for finding PSF in ppSubMakePSF, seems to be using a merged list with refstk and many missing rather than the inConv list...
- hack to add more into list helps, but moments analysis still restricted somewhere else and solution still generally poor
- SSdiffs suspect mostly okay since both stacks but wouldn't be surprised if isn't okay and just generally appears so (seems to be a general trend with IPP...)
- WWdiffs on the 3PI may have slight issue as well, WSdiffs on 3PI MOPS is just starting to look at an suspect will have similar problem then
- traces back to pmSourceMatchMerge set for keeping a full merge list and not just matched -- how do other parts use this sources data?
- psphot on diffim conflicts with ppSub phot. problem or setup wrong?
- COMP_WT type for refConv.wt doesn't scale right and NANs the cores of brighter stars
- -threads isn't listed as an option in the ppSub arguements
- REVERSE in ppSubMakePSF.c never defined, should be INVERSE for -inverse/INVERSE?
- later should also evaluate whether conv refstack is the better one to use here
- NOCONV case not working well? recheck normalization
- WS diffims use TARGET2 only or choice?
Example: MD09, TNO145452 (Alan Fitzsimmons)
TNO 145452
- a bit faint but its' the best one I've found so far, as it stays in the field for a long long time.
- in MD09 where we can predict the y magnitude should be within 0.1 mag of ~19.3 for the below observations
- a bunch of y-band exposures in 2011 and 2012.
- columns are Exp ID, MJD, RA, Dec.
2011: Exposure ID MJD RA Dec o5756g0570o 55756.592040 333.326857 +0.597387 o5756g0571o 55756.595015 333.326815 +0.597377 o5756g0572o 55756.597969 333.326774 +0.597368 o5756g0573o 55756.600918 333.326733 +0.597359 o5756g0574o 55756.603875 333.326692 +0.597350 o5756g0576o 55756.609792 333.326609 +0.597332 o5756g0577o 55756.612748 333.326568 +0.597323 o5757g0356o 55757.496424 333.314491 +0.594541 o5757g0357o 55757.499384 333.314449 +0.594532 o5757g0358o 55757.502357 333.314407 +0.594522 o5757g0359o 55757.505335 333.314365 +0.594513 o5757g0360o 55757.508292 333.314323 +0.594503 o5757g0361o 55757.511248 333.314281 +0.594494 o5757g0362o 55757.514208 333.314239 +0.594484 o5757g0363o 55757.517163 333.314197 +0.594475 o5766g0299o 55766.477073 333.180973 +0.559502 o5784g0173o 55784.507883 332.868350 +0.454736 o5784g0174o 55784.510828 332.868295 +0.454715 o5784g0175o 55784.513776 332.868239 +0.454695 o5784g0176o 55784.516717 332.868184 +0.454674 o5784g0177o 55784.519667 332.868128 +0.454654 o5784g0178o 55784.522608 332.868073 +0.454633 o5784g0180o 55784.528498 332.867962 +0.454592 (ending at 08-11-2011) 2012: (starting 06-29-2012) Exposure ID MJD RA Dec o6107g0064o 56107.597172 334.910525 +0.746688 o6107g0065o 56107.600110 334.910498 +0.746686 o6107g0066o 56107.603062 334.910470 +0.746684 o6107g0067o 56107.606006 334.910442 +0.746681 o6107g0068o 56107.608993 334.910414 +0.746679 o6201g0056o 56201.242691 333.383584 +0.125386 o6201g0057o 56201.245657 333.383540 +0.125358 o6201g0058o 56201.248616 333.383497 +0.125330
This is the best example in the database because of the density of measurements and the known small amplitude of any lightcurve. In warp-warp diffs the slow motion will mean that 3PI and OSS measurements would be incorrect due to self-subtraction of the flux. But this should not only occur in MD fields as MOPS is being fed warp-stack measurements, and it would make the object fainter not brighter as seen. The variation in z-band and in other filters in 2012 is also puzzling.
Plot of observed magnitudes converted to V (top), and residual of magnitude (observed - predicted), in 2011 and 2012:
(Key: g=green, r=red,i=orange,z=purple,y=cyan)
camera SMFs: both the original nightly processing and MD.GR0 reprocessing
Filename IPP_IDET CAL_PSF_MAG CAL_PSF_MAG PSF_INST_MAG_SIG PSF_INST_MAG_SIG AP_MAG PSF_MAJOR PSF_QF_PERFECT FLAGS FLAGS2 rsep chipXY >>>>>>>> original V2 processing, synthcat allsmf_y/1091859485.gpc1:MD09.nt:2011:07:14:o5756g0570o.361984:o5756g0570o.361984.cm.233853.smf 01006 19.542 0.011 -9.877 0.053 -9.764 1.989 1.000 0x02200001 0x00000080 0.29 XY13 allsmf_y/1091858911.gpc1:MD09.nt:2011:07:14:o5756g0571o.361983:o5756g0571o.361983.cm.233852.smf 01542 19.308 0.008 -10.115 0.037 -10.443 1.995 1.000 0x06200005 0x00000080 0.31 XY14 allsmf_y/1091937189.gpc1:MD09.nt:2011:07:14:o5756g0572o.361986:o5756g0572o.361986.cm.233864.smf 02746 19.161 0.000 -10.269 0.039 -11.142 2.814 0.999 0x02204001 0x00000080 0.37 XY14 allsmf_y/1091890096.gpc1:MD09.nt:2011:07:14:o5756g0573o.361985:o5756g0573o.361985.cm.233854.smf 00831 19.368 0.000 -10.049 0.041 -10.092 1.774 0.998 0x02200001 0x00000080 0.26 XY15 allsmf_y/1091937005.gpc1:MD09.nt:2011:07:14:o5756g0574o.361988:o5756g0574o.361988.cm.233861.smf 00890 19.271 0.000 -10.136 0.033 -10.241 1.580 0.997 0x06200045 0x00000080 0.29 XY25 allsmf_y/1092057932.gpc1:MD09.nt:2011:07:14:o5756g0576o.361989:o5756g0576o.361989.cm.233862.smf 00741 19.232 0.000 -10.172 0.031 -10.289 1.493 0.998 0x06204007 0x00000080 0.32 XY36 allsmf_y/1091915330.gpc1:MD09.nt:2011:07:14:o5756g0577o.361991:o5756g0577o.361991.cm.233856.smf 00714 19.226 0.011 -10.188 0.035 -10.240 1.703 0.997 0x06200005 0x00000080 0.25 XY36 allsmf_y/1094681457.gpc1:MD09.nt:2011:07:15:o5757g0356o.362440:o5757g0356o.362440.cm.234103.smf 00709 19.299 0.014 -10.026 0.036 -10.095 1.699 0.997 0x06200005 0x00000080 0.25 XY26 allsmf_y/1094682661.gpc1:MD09.nt:2011:07:15:o5757g0357o.362439:o5757g0357o.362439.cm.234105.smf 00825 19.279 0.000 -10.032 0.033 -10.068 1.609 0.998 0x06200005 0x00000080 0.25 XY36 allsmf_y/1094757324.gpc1:MD09.nt:2011:07:15:o5757g0358o.362441:o5757g0358o.362441.cm.234104.smf 00783 19.371 0.000 -9.926 0.033 -9.896 1.503 0.997 0x06200045 0x00000080 0.29 XY36 allsmf_y/1096254860.gpc1:MD09.nt:2011:07:15:o5757g0359o.362442:o5757g0359o.362442.cm.234355.smf 00755 19.239 0.014 -10.060 0.026 -10.177 1.250 0.998 0x06204007 0x00000080 0.27 XY46 allsmf_y/1094702845.gpc1:MD09.nt:2011:07:15:o5757g0360o.362443:o5757g0360o.362443.cm.234106.smf 00760 19.292 0.011 -10.005 0.027 -10.044 1.323 0.998 0x06200045 0x00000080 0.16 XY56 allsmf_y/1094717069.gpc1:MD09.nt:2011:07:15:o5757g0361o.362444:o5757g0361o.362444.cm.234108.smf 00763 19.260 0.011 -10.041 0.025 -10.046 1.151 0.612 0x06200005 0x000000a0 0.23 XY55 allsmf_y/1094852307.gpc1:MD09.nt:2011:07:15:o5757g0362o.362445:o5757g0362o.362445.cm.234107.smf 00778 19.324 0.000 -9.986 0.027 -10.039 1.295 0.998 0x06200045 0x00000080 0.24 XY65 allsmf_y/1094715184.gpc1:MD09.nt:2011:07:15:o5757g0363o.362447:o5757g0363o.362447.cm.234110.smf 01119 19.273 0.000 -10.042 0.029 -9.927 1.429 0.943 0x02204001 0x00000080 0.32 XY65 allsmf_y/1128179911.gpc1:MD09.nt:2011:07:24:o5766g0299o.367502:o5766g0299o.367502.cm.239536.smf 00638 19.196 0.014 -9.318 0.057 -9.741 1.237 0.999 0x02204001 0x00000080 0.31 XY66 allsmf_y/1177140372.gpc1:MD09.nt:2011:08:11:o5784g0173o.374858:o5784g0173o.374858.cm.246059.smf 00709 19.202 0.011 -10.199 0.036 -10.238 2.102 0.998 0x06200005 0x00000080 0.29 XY02 allsmf_y/1177146799.gpc1:MD09.nt:2011:08:11:o5784g0174o.374859:o5784g0174o.374859.cm.246060.smf 00735 19.111 0.000 -10.271 0.031 -10.319 1.926 0.999 0x06200005 0x00000080 0.31 XY03 allsmf_y/1177195723.gpc1:MD09.nt:2011:08:11:o5784g0175o.374860:o5784g0175o.374860.cm.246063.smf 00727 19.223 0.008 -10.156 0.031 -10.161 1.718 0.998 0x06200005 0x00000080 0.35 XY04 allsmf_y/1177158950.gpc1:MD09.nt:2011:08:11:o5784g0176o.374861:o5784g0176o.374861.cm.246064.smf 00549 19.235 0.000 -10.129 0.029 -10.127 1.590 0.998 0x06200005 0x00000080 0.32 XY05 allsmf_y/1177171394.gpc1:MD09.nt:2011:08:11:o5784g0177o.374862:o5784g0177o.374862.cm.246065.smf 00597 19.251 0.000 -10.115 0.030 -10.088 1.569 0.998 0x06200045 0x00000080 0.32 XY05 allsmf_y/1177178772.gpc1:MD09.nt:2011:08:11:o5784g0178o.374863:o5784g0178o.374863.cm.246066.smf 00673 19.186 0.000 -10.180 0.029 -10.259 1.625 0.998 0x06200045 0x00000080 0.34 XY16 allsmf_y/1177199195.gpc1:MD09.nt:2011:08:11:o5784g0180o.374865:o5784g0180o.374865.cm.246068.smf 00698 19.323 0.016 -10.056 0.033 -9.877 1.721 0.906 0x06200045 0x00000080 0.29 XY27 >>>>>>>> MD.GR0 reprocessed with ubercal allsmf_y/2119523678.gpc1:MD09.GR0.20120601:o5756g0570o.361984:o5756g0570o.361984.cm.444636.smf 00927 19.403 0.035 -9.869 0.054 -9.556 3.071 0.998 0x02200001 0x00000000 0.17 XY13 allsmf_y/2119525130.gpc1:MD09.GR0.20120601:o5756g0571o.361983:o5756g0571o.361983.cm.444635.smf 01430 19.151 0.038 -10.121 0.042 -9.949 2.991 0.984 0x02200001 0x00000080 0.28 XY14 allsmf_y/2119527511.gpc1:MD09.GR0.20120601:o5756g0572o.361986:o5756g0572o.361986.cm.444638.smf 02385 19.554 0.038 -9.723 0.055 -9.786 4.134 0.997 0x02200001 0x00000000 0.28 XY14 allsmf_y/2119526275.gpc1:MD09.GR0.20120601:o5756g0573o.361985:o5756g0573o.361985.cm.444637.smf 00774 19.171 0.035 -10.097 0.039 -10.215 2.668 0.998 0x02200001 0x00000080 0.29 XY15 allsmf_y/2119528877.gpc1:MD09.GR0.20120601:o5756g0574o.361988:o5756g0574o.361988.cm.444640.smf 00838 19.121 0.035 -10.135 0.033 -10.212 2.317 0.997 0x06200005 0x00000080 0.31 XY25 allsmf_y/2119536441.gpc1:MD09.GR0.20120601:o5756g0576o.361989:o5756g0576o.361989.cm.444641.smf 00706 19.046 0.035 -10.207 0.031 -10.353 2.188 0.997 0x02204001 0x00000080 0.30 XY36 allsmf_y/2119539963.gpc1:MD09.GR0.20120601:o5756g0577o.361991:o5756g0577o.361991.cm.444642.smf 00680 19.073 0.034 -10.192 0.035 -10.233 2.500 0.997 0x06200005 0x00000080 0.25 XY36 allsmf_y/2119543361.gpc1:MD09.GR0.20120601:o5757g0356o.362440:o5757g0356o.362440.cm.444644.smf 00684 19.136 0.036 -10.037 0.036 -10.074 2.599 0.997 0x06200005 0x00000080 0.25 XY26 allsmf_y/2119541070.gpc1:MD09.GR0.20120601:o5757g0357o.362439:o5757g0357o.362439.cm.444643.smf 00771 19.105 0.037 -10.055 0.033 -10.072 2.382 0.998 0x06200005 0x00000080 0.23 XY36 allsmf_y/2119550643.gpc1:MD09.GR0.20120601:o5757g0358o.362441:o5757g0358o.362441.cm.444645.smf 00729 19.180 0.042 -9.962 0.032 -9.961 2.250 0.997 0x06200005 0x00000080 0.26 XY36 allsmf_y/2119551751.gpc1:MD09.GR0.20120601:o5757g0359o.362442:o5757g0359o.362442.cm.444646.smf 00763 19.093 0.045 -10.045 0.026 -10.117 1.838 0.998 0x06200005 0x00000080 0.26 XY46 allsmf_y/2119564253.gpc1:MD09.GR0.20120601:o5757g0360o.362443:o5757g0360o.362443.cm.444651.smf 00736 19.142 0.043 -9.994 0.027 -10.027 2.126 0.998 0x06200005 0x00000080 0.21 XY56 allsmf_y/2119554727.gpc1:MD09.GR0.20120601:o5757g0361o.362444:o5757g0361o.362444.cm.444648.smf 00721 19.105 0.041 -10.036 0.025 -10.037 1.673 0.609 0x06200005 0x000000a0 0.26 XY55 allsmf_y/2119560202.gpc1:MD09.GR0.20120601:o5757g0362o.362445:o5757g0362o.362445.cm.444649.smf 00734 19.136 0.040 -10.015 0.027 -10.064 1.949 0.998 0x06200045 0x00000080 0.23 XY65 allsmf_y/2119558442.gpc1:MD09.GR0.20120601:o5757g0363o.362447:o5757g0363o.362447.cm.444650.smf 00972 19.113 0.039 -10.046 0.029 -9.933 2.143 0.940 0x06200005 0x00000080 0.29 XY65 allsmf_y/2119575990.gpc1:MD09.GR0.20120601:o5766g0299o.367502:o5766g0299o.367502.cm.444658.smf 00609 19.022 0.059 -9.326 0.057 -9.720 1.860 0.999 0x02204001 0x00000000 0.25 XY66 allsmf_y/2119581769.gpc1:MD09.GR0.20120601:o5784g0173o.374858:o5784g0173o.374858.cm.444664.smf 00624 18.992 0.035 -10.256 0.036 -10.200 3.258 0.998 0x06200005 0x00000080 0.23 XY02 allsmf_y/2119581016.gpc1:MD09.GR0.20120601:o5784g0174o.374859:o5784g0174o.374859.cm.444665.smf 00684 18.953 0.033 -10.275 0.031 -10.298 2.889 0.999 0x06200005 0x00000080 0.25 XY03 allsmf_y/2119581238.gpc1:MD09.GR0.20120601:o5784g0175o.374860:o5784g0175o.374860.cm.444666.smf 00696 19.078 0.036 -10.146 0.031 -10.121 2.508 0.997 0x06200005 0x00000080 0.31 XY04 allsmf_y/2119587747.gpc1:MD09.GR0.20120601:o5784g0176o.374861:o5784g0176o.374861.cm.444667.smf 00518 19.059 0.035 -10.152 0.029 -10.159 2.365 0.997 0x06200005 0x00000080 0.25 XY05 allsmf_y/2119589883.gpc1:MD09.GR0.20120601:o5784g0177o.374862:o5784g0177o.374862.cm.444668.smf 00557 19.104 0.036 -10.106 0.029 -10.121 2.495 0.996 0x06200005 0x00000080 0.27 XY05 allsmf_y/2119590278.gpc1:MD09.GR0.20120601:o5784g0178o.374863:o5784g0178o.374863.cm.444669.smf 00624 19.065 0.034 -10.149 0.030 -10.197 2.473 0.998 0x06200005 0x00000080 0.27 XY16 allsmf_y/2119589969.gpc1:MD09.GR0.20120601:o5784g0180o.374865:o5784g0180o.374865.cm.444670.smf 00641 19.130 0.034 -10.096 0.032 -9.945 2.512 0.901 0x06200005 0x00000080 0.27 XY27 >>>>>>>> 2012 w/ ubercal allsmf_y/2152846158.gpc1:MD09.nt:2012:06:29:o6107g0064o.500972:o6107g0064o.500972.cm.452770.smf 00621 19.137 0.038 -10.103 0.037 -10.119 3.645 0.998 0x06200005 0x00000080 0.36 XY64 allsmf_y/2152850545.gpc1:MD09.nt:2012:06:29:o6107g0065o.500973:o6107g0065o.500973.cm.452771.smf 00751 19.263 0.040 -9.977 0.042 -9.584 3.641 0.998 0x02200001 0x00000080 0.30 XY64 allsmf_y/2152853156.gpc1:MD09.nt:2012:06:29:o6107g0066o.500974:o6107g0066o.500974.cm.452772.smf 00687 19.085 0.034 -10.147 0.033 -10.300 3.273 0.999 0x02204001 0x00000080 0.35 XY63 allsmf_y/2152855541.gpc1:MD09.nt:2012:06:29:o6107g0067o.500975:o6107g0067o.500975.cm.452773.smf 00802 19.239 0.035 -9.995 0.039 -9.818 3.353 0.999 0x06200045 0x00000080 0.33 XY63 allsmf_y/2152858750.gpc1:MD09.nt:2012:06:29:o6107g0068o.500976:o6107g0068o.500976.cm.452774.smf 00683 19.285 0.037 -9.948 0.043 -9.940 3.404 0.998 0x02200001 0x00000080 0.32 XY62 allsmf_y/2619124827.gpc1:MD09.nt:2012:10:01:o6201g0056o.524345:o6201g0056o.524345.cm.593200.smf 00705 19.116 0.043 -9.862 0.055 -9.606 2.500 0.997 0x02200001 0x00000000 0.24 XY55 allsmf_y/2619134453.gpc1:MD09.nt:2012:10:01:o6201g0057o.524346:o6201g0057o.524346.cm.593201.smf 00785 19.083 0.039 -10.065 0.038 -10.225 2.450 0.998 0x06200005 0x00000080 0.30 XY55 allsmf_y/2619131479.gpc1:MD09.nt:2012:10:01:o6201g0058o.524347:o6201g0058o.524347.cm.593203.smf 00808 19.272 0.037 -9.863 0.046 -9.778 2.578 0.997 0x02200001 0x00000080 0.32 XY55
Test diffims with o5766g0299o: MD.GR0 with 2 skycell overlap (056,057):
- skycell FWHM -- looks like will be some deconvolution, more so (>1.5 pixel) with the convolved refstack
--- skycell.056 Input FWHM: 2.826513 Reference FWHM: 4.538850 Iso-kernel region: [21:6378,21:6378] out of 6400,6400 Found 276 stamps Kron Radii vs FWHMs 1: fwhm: 2.826513, kron 4.354785 Kron Radii vs FWHMs 2: fwhm: 4.538850, kron 4.764421 -- skycell.057 Input FWHM: 3.011812 Reference FWHM: 4.999094 Iso-kernel region: [21:6378,21:6378] out of 6400,6400 Found 263 stamps Kron Radii vs FWHMs 1: fwhm: 3.011812, kron 4.395961 Kron Radii vs FWHMs 2: fwhm: 4.999094, kron 4.996646 --- skycell.056 unconvolved refstack Input FWHM: 2.826513 Reference FWHM: 3.358581 Iso-kernel region: [21:6378,21:6378] out of 6400,6400 Found 276 stamps Kron Radii vs FWHMs 1: fwhm: 2.826513, kron 4.328077 Kron Radii vs FWHMs 2: fwhm: 3.358581, kron 4.211567 --- skycell.057 unconvolved refstack Input FWHM: 3.011812 Reference FWHM: 3.642784 Iso-kernel region: [21:6378,21:6378] out of 6400,6400 Found 263 stamps Kron Radii vs FWHMs 1: fwhm: 3.011812, kron 4.754183 Kron Radii vs FWHMs 2: fwhm: 3.642784, kron 4.327400
- psphot run on warp with ipp-20121218 tag using basically random seeds --
IPP_IDET CAL_PSF_MAG CAL_PSF_MAG_SIG PSF_INST_MAG PSF_INST_MAG_SIG AP_MAG PSF_MAJOR PSF_QF_PERFECT FLAGS FLAGS2 rsep --- skycell.056 00836 19.023 0.000 -9.325 0.056 -9.677 1.924 0.999 0x02204001 0x00000000 0.22 00834 19.026 0.000 -9.321 0.056 -9.674 1.922 0.999 0x02204001 0x00000000 0.22 --- skycell.057 00766 18.999 0.000 -9.348 0.055 -9.697 1.920 0.999 0x02204001 0x00000000 0.23 00768 19.004 0.000 -9.343 0.056 -9.666 1.922 0.999 0x02204001 0x00000000 0.23
- original WSdiff, V2, synthcat (rerun with old tag give similar values) -- agrees with relative SMF w/in uncertainties
IPP_IDET CAL_PSF_MAG CAL_PSF_MAG_SIG PSF_INST_MAG PSF_INST_MAG_SIG AP_MAG PSF_MAJOR PSF_QF_PERFECT FLAGS FLAGS2 DIFF_NRATIO_BAD rsep 00430 19.262 0.000 -9.252 0.225 -9.487 1.596 0.997 0x02200001 0x00000081 0.70 0.29
- rerun WSdiff with recent tag ipp-20121026 but original V2 pixels with synthcat -- agrees with relative SMF w/in uncertainties and to original tag version.
IPP_IDET CAL_PSF_MAG CAL_PSF_MAG_SIG PSF_INST_MAG PSF_INST_MAG_SIG AP_MAG PSF_MAJOR PSF_QF_PERFECT FLAGS FLAGS2 DIFF_NRATIO_BAD rsep 00430 19.233 0.000 -9.282 0.220 -9.481 2.364 0.998 0x02200001 0x00000881 0.69 0.31
- WSdiff with MD.GR0 V3 and ubercal -- skycell.056 agrees with relative SMF w/in uncertainties but skycell.057 has a problem.
IPP_IDET CAL_PSF_MAG CAL_PSF_MAG_SIG PSF_INST_MAG PSF_INST_MAG_SIG AP_MAG PSF_MAJOR PSF_QF_PERFECT FLAGS FLAGS2 DIFF_NRATIO_BAD rsep --- skycell.056 00269 19.102 0.000 -9.245 0.115 -9.531 1.956 0.999 0x02200001 0x00000882 0.70 0.21 --- skycell.057 00234 18.799 0.000 -9.548 0.120 -9.658 2.679 0.998 0x02200001 0x00000882 0.71 0.21
- WSdiff for MD are typically with convolved refstack, run with unconvolved from MD.GR0 -- similar to the normal WSdiff convolved case with skycell.057 having a problem, but skycell.056 also >1-sig different from the SMF. Extra flags mean ??
IPP_IDET CAL_PSF_MAG CAL_PSF_MAG_SIG PSF_INST_MAG PSF_INST_MAG_SIG AP_MAG PSF_MAJOR PSF_QF_PERFECT FLAGS FLAGS2 DIFF_NRATIO_BAD rsep --- skycell.056 00129 19.240 0.000 -9.108 0.090 -9.515 1.897 0.999 0x06a04007 0x00000882 0.69 0.21 --- skycell.057 00115 18.881 0.000 -9.466 0.090 -9.635 2.420 0.999 0x02200001 0x00000882 0.71 0.21
- since slow moving TNO (<1 pixel in 4 exposures covered in night stack), is in SSdiff for comparison (unconv SSdiff is what SN/transients use and haven't noticed a problem) -- all agree with relative SMF w/in uncertainty and relative to each similar run but are systematically fainter by ~0.03--0.1.
IPP_IDET CAL_PSF_MAG CAL_PSF_MAG_SIG PSF_INST_MAG PSF_INST_MAG_SIG AP_MAG PSF_MAJOR PSF_QF_PERFECT FLAGS FLAGS2 DIFF_NRATIO_BAD rsep --- V2 original nightly stack SSdiff (night 20110724) 00186 19.294 0.000 -13.914 0.059 -14.083 1.791 0.998 0x02200001 0x00000081 0.70 0.26 --- V2 rerun with recent tag version 00169 19.251 0.000 -13.957 0.059 -14.092 2.742 0.998 0x02200001 0x00000881 0.69 0.28 Input FWHM: 3.328463 Reference FWHM: 3.358581 Iso-kernel region: [21:6378,21:6378] out of 6400,6400 Found 475 stamps Kron Radii vs FWHMs 1: fwhm: 3.328463, kron 3.856692 Kron Radii vs FWHMs 2: fwhm: 3.358581, kron 4.226551 Input FWHM: 3.840636 Reference FWHM: 3.642784 Iso-kernel region: [21:6378,21:6378] out of 6400,6400 Found 455 stamps Kron Radii vs FWHMs 1: fwhm: 3.840636, kron 3.999478 Kron Radii vs FWHMs 2: fwhm: 3.642784, kron 4.368307 --- MD.GR0 V3 skycell.056 old and current tag version -- with ubercal catalog -- 00289 19.053 0.000 -14.155 0.071 -14.311 2.112 0.999 0x02200001 0x00000882 0.72 0.22 00241 19.069 0.000 -14.139 0.069 -14.307 2.130 0.999 0x02200001 0x00000882 0.69 0.21 --- MD.GR0 V3 skycell.057 old and current tag version 00292 19.101 0.000 -14.107 0.071 -14.309 1.380 0.999 0x02200001 0x00000082 0.72 0.21 00240 19.099 0.000 -14.109 0.069 -14.303 1.418 0.999 0x02200001 0x00000082 0.69 0.19
- rerun WS diffim on MD.GR0 warps only with recent tag/trunk fix-A 201302xx -- mostly agree to SMF now and across skycell
IPP_IDET CAL_PSF_MAG CAL_PSF_MAG_SIG PSF_INST_MAG PSF_INST_MAG_SIG AP_MAG PSF_MAJOR PSF_QF_PERFECT FLAGS FLAGS2 DIFF_NRATIO_BAD rsep --- skycell.056 (same seed, random 2x) 00326 19.004 0.000 -9.343 0.108 -9.654 1.912 0.999 0x06a04007 0x00000882 0.76 0.21 00297 19.002 0.000 -9.345 0.106 -9.658 1.916 0.999 0x06a04007 0x00000882 0.77 0.21 00325 19.008 0.000 -9.339 0.108 -9.645 1.915 0.999 0x06a04007 0x00000882 0.76 0.21 --- skycell.057 00237 18.991 0.000 -9.357 0.114 -9.658 1.896 0.999 0x06a04007 0x00000882 0.75 0.21 00260 18.985 0.000 -9.362 0.113 -9.664 1.900 0.999 0x06a04007 0x00000882 0.75 0.21 00252 18.986 0.000 -9.361 0.113 -9.669 1.902 0.999 0x06a04007 0x00000882 0.75 0.21
- rerun SSdiff on MD.GR0 stacks only with fix-A also -- will want to test other SSdiffs but don't expect it to do much other than improve PSF determination in rare cases maybe on edges. PSF appears to be improved, closer to SMF and between each other, but AP between exposures has a larger difference. However, the psf_major before was clearly too small.
IPP_IDET CAL_PSF_MAG CAL_PSF_MAG_SIG PSF_INST_MAG PSF_INST_MAG_SIG AP_MAG PSF_MAJOR PSF_QF_PERFECT FLAGS FLAGS2 DIFF_NRATIO_BAD rsep --- skycell.056 00287 19.010 0.000 -14.198 0.068 -14.432 2.111 0.999 0x06a04007 0x00000882 0.76 0.22 00223 19.000 0.000 -14.208 0.067 -14.448 2.123 0.999 0x06a04007 0x00000882 0.76 0.22 --- skycell.057 00294 19.022 0.000 -14.186 0.067 -14.426 2.090 0.999 0x06a04007 0x00000882 0.74 0.21 00235 19.028 0.000 -14.181 0.068 -14.423 2.133 0.999 0x06a04007 0x00000882 0.74 0.21
Large sample diffim photometry for y-band
With fix-A applied --
- large scatter removed (see scatter in original plot at beginning of section)
- appears to be a clear mean offset of ~0.07 mag (diffim PSF_MAG brighter) Is this similar to other convolution mag offsets? Also not all unlikely that a few could be as high as ~0.15 mag offset as seen in the MD10 example above. It is also important to note also that the photerr on the diffim photometry is typically of order 0.1-0.15 for this sample as well when using the default convolved refstack.
- also appears AP_MAG may have two groupings, splitting earlier and later data moves contribution mostly randomly (time split can involve data quality and skycell position since mover)
- a larger background bin of 300 (rather than 128 in fix-A, but with same seed) seems to reduce the second group in the AP_MAG
With fix-A removing large PSF scatter, where is the ~0.07 mag offset coming from?
- the SMF and psphot (ipp-20121218 tag) run on warps
- the same psphot on warps and ppSub with fix-A and background bin 128 -- so from ppSub photometry
Example: MD01, MBA 131130 (Alan Fitzsimmons)
This is a nice example of the offset plus large scatter in y-band for a Main Belt Asteroid seen this year.
Exposure ID RA Dec -- start 20120830 o6169g0184o 36.353429 -4.350323 o6169g0185o 36.353441 -4.350616 o6170g0586o 36.360948 -4.446235 o6170g0588o 36.360938 -4.446831 o6170g0590o 36.360927 -4.447427 o6170g0591o 36.360922 -4.447725 o6170g0593o 36.360911 -4.448320 o6171g0613o 36.362699 -4.549196 o6171g0614o 36.362676 -4.549499 o6171g0616o 36.362631 -4.550103 o6171g0617o 36.362608 -4.550406 o6171g0619o 36.362562 -4.551012 o6172g0677o 36.358383 -4.654112 o6172g0682o 36.358181 -4.655647 o6172g0683o 36.358141 -4.655956 o6172g0684o 36.358101 -4.656264
| Plot of observed magnitudes converted to V (top), and residual of magnitude (observed - predicted) in 2012. The large gap in the data was caused by telescope shutdown due to rotator problems. (Key: g=green, r=red,i=orange,z=purple,y=cyan) |
|
camera SMFs: all with ubercal catalog -- clearly some variation upwards ~0.5 mag variation night-to-night, ~0.1 w/in a night
Filename IPP_IDET CAL_PSF_MAG CAL_PSF_MAG PSF_INST_MAG_SIG PSF_INST_MAG_SIG AP_MAG PSF_MAJOR PSF_QF_PERFECT FLAGS FLAGS2 rsep chipXY allsmf_y/2458688059.gpc1:MD01.nt:2012:08:30:o6169g0184o.516307:o6169g0184o.516307.cm.547162.smf 00807 19.535 0.066 -9.568 0.050 -10.349 2.406 0.996 0x02204001 0x00000080 0.29 XY42 allsmf_y/2458693061.gpc1:MD01.nt:2012:08:30:o6169g0185o.516308:o6169g0185o.516308.cm.547163.smf 00652 19.576 0.066 -9.521 0.051 -10.036 2.179 0.996 0x02204001 0x00000000 0.15 XY32 allsmf_y/2467608609.gpc1:MD01.nt:2012:08:31:o6170g0586o.516969:o6170g0586o.516969.cm.549810.smf 00726 20.144 0.067 -9.003 0.077 -8.749 1.870 0.998 0x02200001 0x00000000 0.20 XY53 allsmf_y/2467613539.gpc1:MD01.nt:2012:08:31:o6170g0588o.516971:o6170g0588o.516971.cm.549819.smf 00880 19.936 0.064 -9.219 0.072 -9.085 2.046 0.996 0x02200001 0x00000000 0.25 XY42 allsmf_y/2467623316.gpc1:MD01.nt:2012:08:31:o6170g0590o.516973:o6170g0590o.516973.cm.549824.smf 00946 19.830 0.062 -9.333 0.068 -9.464 2.078 0.996 0x02200001 0x00000000 0.27 XY42 allsmf_y/2467633036.gpc1:MD01.nt:2012:08:31:o6170g0591o.516974:o6170g0591o.516974.cm.549826.smf 00720 19.933 0.066 -9.223 0.071 -9.228 1.950 0.997 0x02200001 0x00000000 0.13 XY32 allsmf_y/2467676288.gpc1:MD01.nt:2012:08:31:o6170g0593o.516976:o6170g0593o.516976.cm.549832.smf 01233 19.826 0.055 -9.339 0.067 -9.389 2.183 0.997 0x02200001 0x00000000 0.15 XY32 allsmf_y/2476572150.gpc1:MD01.nt:2012:09:01:o6171g0613o.517689:o6171g0613o.517689.cm.552533.smf 00632 19.784 0.057 -9.443 0.060 -9.659 2.326 0.999 0x02200001 0x00000000 0.26 XY52 allsmf_y/2476588989.gpc1:MD01.nt:2012:09:01:o6171g0616o.517692:o6171g0616o.517692.cm.552537.smf 00950 19.883 0.063 -9.343 0.066 -9.675 2.505 0.998 0x02200001 0x00000000 0.15 XY42 allsmf_y/2476595216.gpc1:MD01.nt:2012:09:01:o6171g0617o.517693:o6171g0617o.517693.cm.552538.smf 01019 19.954 0.056 -9.259 0.069 -9.436 2.307 0.998 0x02204001 0x00000000 0.25 XY32 allsmf_y/2476598472.gpc1:MD01.nt:2012:09:01:o6171g0614o.517690:o6171g0614o.517690.cm.552534.smf 00594 19.762 0.065 -9.464 0.057 -9.811 2.268 0.997 0x02200001 0x00000000 0.25 XY42 allsmf_y/2476607853.gpc1:MD01.nt:2012:09:01:o6171g0619o.517695:o6171g0619o.517695.cm.552543.smf 00758 19.976 0.075 -9.248 0.077 -9.087 2.363 0.997 0x02200001 0x00000000 0.25 XY32 allsmf_y/2484999709.gpc1:MD01.nt:2012:09:02:o6172g0677o.518454:o6172g0677o.518454.cm.555033.smf 00625 19.900 0.066 -9.287 0.068 -9.649 2.198 0.997 0x02204001 0x00000000 0.31 XY53 allsmf_y/2485059002.gpc1:MD01.nt:2012:09:02:o6172g0682o.518459:o6172g0682o.518459.cm.555046.smf 00657 19.951 0.070 -9.176 0.070 -9.610 1.906 0.999 0x02204001 0x00000000 0.14 XY32 allsmf_y/2485059159.gpc1:MD01.nt:2012:09:02:o6172g0683o.518460:o6172g0683o.518460.cm.555048.smf 00999 20.006 0.058 -9.172 0.063 -9.019 1.894 0.998 0x02200001 0x00000000 0.22 XY32 allsmf_y/2485060268.gpc1:MD01.nt:2012:09:02:o6172g0684o.518461:o6172g0684o.518461.cm.555050.smf 00660 19.934 0.053 -9.257 0.057 -9.620 1.998 0.999 0x02204001 0x00000000 0.26 XY32
Test diffims: with o6170g0586o, o6170g0588o -- MD01.V3 skycell.043, xy=4970.30, 4633.17 and ubercal catalog being normally processed after April 2012 --
- psphot run on warp with ipp-20121218 tag using basically random seeds --
IPP_IDET CAL_PSF_MAG CAL_PSF_MAG_SIG PSF_INST_MAG PSF_INST_MAG_SIG AP_MAG PSF_MAJOR PSF_QF_PERFECT FLAGS FLAGS2 rsep --- o6170g0586o 00766 20.128 0.000 -9.019 0.074 -8.851 1.884 0.999 0x02200001 0x00000000 0.21 00762 20.116 0.000 -9.031 0.073 -8.881 1.880 0.999 0x02200001 0x00000000 0.21 --- o6170g0588o 00745 19.919 0.000 -9.236 0.071 -9.155 2.222 0.998 0x02200001 0x00000000 0.24 00746 19.919 0.000 -9.236 0.072 -8.962 2.252 0.998 0x02200001 0x00000000 0.22
- original WSdiff using tag ipp-20120802 -- again well off from the SMF photometry by ~0.6 mag
IPP_IDET CAL_PSF_MAG CAL_PSF_MAG_SIG PSF_INST_MAG PSF_INST_MAG_SIG AP_MAG PSF_MAJOR PSF_QF_PERFECT FLAGS FLAGS2 DIFF_NRATIO_BAD rsep --- o6170g0586o 00096 19.528 0.000 -9.619 0.154 -9.187 3.370 0.992 0x02200001 0x00000881 0.59 0.20 --- o6170g0588o 00103 19.454 0.000 -9.701 0.166 -9.210 3.294 0.992 0x02200001 0x00000881 0.56 0.25
- rerun WSdiff with recent tag ipp-20121218 -- no real reason to do this...
- rerun with recent tag/trunk fix-A 201302xx and default conv refstack -- now photometry matching SMF photometry w/in photerr
IPP_IDET CAL_PSF_MAG CAL_PSF_MAG_SIG PSF_INST_MAG PSF_INST_MAG_SIG AP_MAG PSF_MAJOR PSF_QF_PERFECT FLAGS FLAGS2 DIFF_NRATIO_BAD rsep --- o6170g0586o (same original ppSub seed, random seed) 00172 20.112 0.000 -9.035 0.162 -8.866 1.849 0.998 0x02204801 0x00000881 0.59 0.20 00177 20.117 0.000 -9.030 0.160 -8.889 1.884 0.998 0x02204801 0x00000881 0.59 0.20 --- o6170g0586o (same original ppSub seed, random seed) 00151 19.889 0.000 -9.266 0.175 -9.168 2.151 0.998 0x06a04007 0x00000881 0.61 0.23 00152 19.890 0.000 -9.264 0.176 -9.158 2.146 0.998 0x06a04007 0x00000881 0.61 0.23
- rerun with recent tag/trunk fix-A 201302xx and unconv refstack -- photerr reduced using the unconv refstack likely from the larger deconv needed on the conv refstacks
IPP_IDET CAL_PSF_MAG CAL_PSF_MAG_SIG PSF_INST_MAG PSF_INST_MAG_SIG AP_MAG PSF_MAJOR PSF_QF_PERFECT FLAGS FLAGS2 DIFF_NRATIO_BAD rsep --- o6170g0586o (same original ppSub seed, random seed) 00158 20.109 0.000 -9.038 0.127 -8.874 1.849 0.998 0x02204801 0x00000881 0.60 0.20 --- o6170g0588o (same original ppSub seed, random seed) 00173 19.892 0.000 -9.263 0.146 -9.157 2.151 0.998 0x06a04007 0x00000881 0.61 0.23
Example (needed): SSdiffim photometry for transients
Do any of the modifications impact the photometry from the SSdiffims critical for the static transient use?
Attachments (11)
-
145452.png
(144.7 KB
) - added by 14 years ago.
lightcurve of 145452 in MD09
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131130.png
(97.0 KB
) - added by 14 years ago.
131130 lightcurve in MD01
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y_ubercal.png
(55.7 KB
) - added by 14 years ago.
mean y-band (O-C)
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z_ubercal.png
(60.7 KB
) - added by 14 years ago.
Mean z-band (O-C)
- smfdiffcmfv0_y.png (54.3 KB ) - added by 13 years ago.
- smfdiffcmfv1b300_y.png (53.4 KB ) - added by 13 years ago.
- smfwrpcmf_y.png (53.4 KB ) - added by 13 years ago.
- warpdiffcmfv0_y.png (53.4 KB ) - added by 13 years ago.
- smfdiffcmflstori_PS1-12sn_md05s031i.png (51.5 KB ) - added by 13 years ago.
- smfdiffcmflstv0_PS1-12sn_md05s031i.png (52.4 KB ) - added by 13 years ago.
- smfdiffcmflstv1b300_PS1-12sn_md05s031i.png (52.5 KB ) - added by 13 years ago.
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