Changes between Version 1 and Version 2 of PS1_GPC1_Release20090707_DataQualityIssues

Timestamp:

Jul 13, 2009, 8:40:33 AM (17 years ago)

Author:

eugene

Comment:

--

PS1_GPC1_Release20090707_DataQualityIssues

@@ -7 +7 @@
 
  * Detrending:
- ** Dark Correction : The camera temperatures have been changing more
+  * Dark Correction : The camera temperatures have been changing more
      than expected this summer.  We found in Run 2 that our dark
      corrections were over- or under-correcting the dark current based
@@ -21 +21 @@
      guide the dark correction for all chips.  The data in this
      release does not yet reflect that change.
-
-  ** y-band fringing.  The new y filter appears to produce a much
+   * y-band fringing.  The new y filter appears to produce a much
      stronger y-band fringe pattern.  Since we were not expecting
      y-band fringes, they are not measured and corrected.  We are now
@@ -29 +28 @@
 
  * Calibration
- ** Astrometry: Based on reports from Doug Finkbeiner and Eddie
+  * Astrometry: Based on reports from Doug Finkbeiner and Eddie
      Schlafly, we have recently realized that the reference astrometry
      and photometry DVO database is in an older format with RA & DEC,
@@ -38 +37 @@
      over the sky.  We are updating the reference database to use
      doubles and future releases will use the improved calibration.
-
-  ** Photometry: the photometric calibration is based on the synthetic
+  * Photometry: the photometric calibration is based on the synthetic
      grizy generated from a combination of 2MASS, USNO-B, and Tycho
      photometry.  In practice, the photometry is dominated by the
@@ -57 +55 @@
 
  * Other
-  ** Astrometry keywords.  Several issues with the astrometry keywords
+  * Astrometry keywords.  Several issues with the astrometry keywords
      have been reported.  We are aware that the headers of the CHIP
      data have both CDi_j style WCS keywords and PC00i00j style
@@ -68 +66 @@
      sufficiently large that the linear version will perform poorly.
      We have not yet chosen one of the non-linear WCS options.
-
-  ** FITS Compression, BSCALE & BZERO:  We have found a bug in the
+  * FITS Compression, BSCALE & BZERO:  We have found a bug in the
      routines that convert from the 32bit float internal
      representation to the 16bit integer output format.  The effect of
      this bug is that the data values as written have a constant
      offset of a small number of DN.  
-
-  ** Missing chips / warps / etc: there is a bug in a portion of the
+  * Missing chips / warps / etc: there is a bug in a portion of the
      photometry code which occasionally results in an unexpected
      failure to detect stars.  These images are treated as if they