Date: Sat, 6 Apr 2002 12:11:41 GMT
From: harvanek@apo.nmsu.edu (Mike Harvanek)
Subject: 2.5m obslog 20020405 (MJD 52370)
                       APACHE POINT OBSERVATORY SDSS 2.5M
                                 OBSERVING LOG
                             Friday April  5, 2002
                                  (MJD 52370)
---=== OBSERVING TEAM ===---
        Mike Harvanek (APO)
        Dan Long      (APO)
---=== OBSERVING PLAN ===---
        Science!
---=== OBSERVING SUMMARY ===---
Seven plates finished (882, 780, 596, 771, 330, 414, 793).  One exposure for
another plate (616) that is usable only for b2.  Light cirrus most of the night
prevented it from being photometric but transparency was still good most of the
time.  Seeing was fairly good too.  The spectrograph focus checked out ok.  All
xsigma and wsigma values for the entire night were in the black.  There were no
problems tonight!
---=== OBSERVING LOG ===---
The spectrograph focus checked out ok this afternoon.  The numbers can be found
in the Problems section.
Clouds kept us closed until the end of twilight (0230Z) but we were open and
on the sky by 0253Z.
Plate 882 (cartridge 9): Guide stars on the gotoField.  Finished in 3
exposures.
Plate 780 (cartridge 5): Guide stars on the gotoField.  Finished in 3
exposures.
Plate 596 (cartridge 8): Guide stars on the gotoField.  Finished in 3
exposures.
Plate 771 (cartridge 6): Guide stars on the gotoField.  When combined
with data from last night (52369) this plate was finished in 1 exposure.
Fiber 4 of this cartridge appears to have a large dirty spot in it.
Plate 330 (cartridge 7): Guide stars on the gotoField.  Finished in 3
exposures.
Plate 814 (cartridge 4): Guide stars on the gotoField.  When combined
with data from last night (52369) this plate was finished in 1 exposure.
Plate 793 (cartridge 2): Guide stars on the gotoField.  Finished in 3
exposures.
Plate 616 (cartridge 1): Guide stars on the gotoField.  We got in 1
exposure before twilight but clouds caused the s/n^2 to be  collimate, 14249
% Compiled module: COLLIMATE.
Reading /data/spectro/52370/sdR-b1-00014249.fit
Reading /data/spectro/52370/sdR-b1-00014250.fit
  COLLIMATE: Min offset = -0.50 pix
  COLLIMATE: Max offset =  0.80 pix
  COLLIMATE: Mean offset =  0.19 +/-  0.31 pix
  COLLIMATE: Camera b1 appears to be OUT-OF-FOCUS (|mean| > 0.15 pix)
  COLLIMATE: Predict blue camera ring movement of   -6.9 degrees for spectro-1
  COLLIMATE:   (if red is already in focus)
Log file        = Collimate-52370-b1-00014249.log
PostScript file = Collimate-52370-b1-00014249.ps
Reading /data/spectro/52370/sdR-b2-00014249.fit
Reading /data/spectro/52370/sdR-b2-00014250.fit
  COLLIMATE: Min offset = -0.42 pix
  COLLIMATE: Max offset =  0.47 pix
  COLLIMATE: Mean offset =  0.07 +/-  0.23 pix
  COLLIMATE: Camera b2 appears to be IN-FOCUS (|mean|  0.15 pix)
  COLLIMATE: Predict (red) piston movement of  2229 steps for spectro-1
  COLLIMATE:   Issue SOP command: "sp1; mechPiston 2229"
Log file        = Collimate-52370-r1-00014249.log
PostScript file = Collimate-52370-r1-00014249.ps
Reading /data/spectro/52370/sdR-r2-00014249.fit
Reading /data/spectro/52370/sdR-r2-00014250.fit
  COLLIMATE: Min offset = -0.81 pix
  COLLIMATE: Max offset =  0.22 pix
  COLLIMATE: Mean offset = -0.14 +/-  0.24 pix
  COLLIMATE: Camera r2 appears to be IN-FOCUS (|mean| < 0.15 pix)
  COLLIMATE: Predict (red) piston movement of  1240 steps for spectro-2
  COLLIMATE:   Issue SOP command: "sp2; mechPiston 1240"
Log file        = Collimate-52370-r2-00014249.log
PostScript file = Collimate-52370-r2-00014249.ps