Changes between Version 45 and Version 46 of MD.GR0

Timestamp:

Sep 29, 2011, 6:01:39 PM (15 years ago)

Author:

Mark Huber

Comment:

--

MD.GR0

@@ -24 +24 @@
 = MD.V3 Tessellation =
 
-The new V3 tessellations are defined at [wiki:PS1_Tessellations] with the following properties:
-
- * 0.25"/pix (previously 0.2"/pix up through V2, and from natural ~0.258"/pixel)
+The new V3 tessellations are defined at [wiki:PS1_Tessellations] with the following general properties:
+
+ * 0.25"/pix (from natural ~0.258"/pixel, previously warped to 0.2"/pix up through V2)
  * 10 x 10 skycell grid (previously 12 x 12)
  * +x is West (flipped from before +x was East), +y is still North
  * 320 pixel (80") overlap (from 300 pixels, 60", in V2) 
- * revised centers if necessary -- was necessary for MD10 (will be for MD07, MD09 and slight RA shift in MD08). Should check all fields work well with new tessellation centers, particularly MD06/NGC4258.
+ * revised centers (if necessary) -- see relevant MD section for more details and the MDS field table (http://ps1sc.ifa.hawaii.edu/PS1wiki/index.php/Medium_Deep_Survey#Actual_Field_Centeres_-_2011-02-21) but in summary
+   * [wiki:MD.GR0#MD10.GR0]: from (351.979 -0.433) to (352.312, -0.433) however an additional offset looks like it should have been applied to cover more of the earlier observation dithers.
+   * [wiki:MD.GR0#MD07.GR0]: from (213.146, +53.417) to (213.454, +53.243) to best cover as much of the earlier observation dithers as possible. 
+   * [wiki:MD.GR0#MD08.GR0]: very slight offset in RA to the W to just align with the MDS field pointing.
+   * [wiki:MD.GR0#MD09.GR0]: from (333.688, +0.283) closer to the current pointing of (334.188, +0.283) however an addition offset was added to move the center about half a skycell to the E to (333.980, +0.283) in order to cover as much of the earlier observation dithers as possible.
+.* All fields should be looked at to see if there are any problems with the new tessellation and dither pattern. 
+ *  [wiki:MD.GR0#MD07.GR0|MD07], [wiki:MD.GR0#MD09.GR0|MD09] will have a preliminary nightly stack made for testing the revised center as well as [wiki:MD.GR0#MD06.GR0|MD06] for NGC4258.