Analysis of startup and shutdown sequences, Campaign 3 Abstract: All SRSRN results are within the limits. All SURN results were also within limits, except that SL slightly exceeded the 8.8 DN limit in the mid-campaign pre-anneal data. The noise stability was within limits, although LL did vary during the campaign, increasing 11% in the first half of the campaign and decreasing 13% in the second half. The photoresponse stability was generally good, but SL had a latent image in one corner of the blue PU array, and LH may have developed a problem pixesl (5,122), which has now exceeded the yellow limit two campaigns in a row. Analysts: Lei Hao & Greg Sloan Procedure version: 2.7 Campaign 3, Startup YEAR 2004 DOY 034 CE1 used for all data collection AORKEY = 8840704 for startup AORKEY = 9210112 for the mid-campaign anneal sequence AORKEY = 8840448 for shutdown NOTE: The AORS for startup and mid-campaign were unnamed. Number of files = 64 for each No known errors. Steps 2 through 5 run OK. Unruly.pro results for startup (IRS-001): Noise characteristics of the modules (in DN) SUR data SRS data noise pre post noise pre post Module limit anneal anneal limit anneal anneal SL 8.8 8.4 8.6 15.0 12.7 12.4 SH 8.8 7.4 6.5 15.0 12.7 12.7 LL 14.5 12.3 12.6 15.0 12.9 12.9 LH 17.6 16.5 17.2 15.0 13.1 13.2 Unruly.pro results for middle (IRS-002): Noise characteristics of the modules (in DN) SUR data SRS data noise pre post noise pre post Module limit anneal anneal limit anneal anneal SL 8.8 9.0 8.5 15.0 11.8 12.0 SH 8.8 7.1 6.8 15.0 12.5 12.6 LL 14.5 14.0 12.1 15.0 12.1 12.6 LH 17.6 16.7 17.0 15.0 12.7 12.9 Unruly.pro results for shutdown (IRS-003): Noise characteristics of the modules (in DN) SUR data SRS data noise pre post noise pre post Module limit anneal anneal limit anneal anneal SL 8.8 8.1 8.4 15.0 12.3 12.2 SH 8.8 7.0 7.5 15.0 12.8 12.7 LL 14.5 10.5 11.2 15.0 12.7 12.8 LH 17.6 17.4 16.9 15.0 13.1 13.1 The analysis applied the PIRAT procedure unruly.pro to FITS files generated by MIPL. For SUR data, the quoted values are the standard deviation of the read noise map. For SRS data, these are the median of the standard deviation map. Comments: All SRSRN data are within limits in both startup and shutdown. The SURN data are slightly more problematic, with SL over the 8.8 DN limit after the startup anneal and before the shutdown anneal, and LH over the 17.6 DN limit after the shutdown anneal. Changes in read noise between anneals and from startup to shutdown: SUR data SRS data 002pre/ 003pre/ 003pre/ 002pre/ 003pre/ 003pre/ Module 001post 002post 001post 001post 002post 001post SL 1.05 0.95 0.94 0.95 1.03 0.99 SH 1.09 1.03 1.08 1.00 1.00 1.01 LL 1.11 0.87 0.83 0.94 1.01 0.98 LH 0.97 1.02 1.01 0.96 1.02 0.99 Comments: Given the length of this campaign compared to IOC/SV activities, the stability remains quite good, with no variations beyond the yellow limits (20% for SURN, 5% for SRSRN). LL did vary enough to be noticeable, growing 11% more noisy in the first half of the campaign and 13% less noisy in the second. Photoresponse stability: Module 002 pre to 001 post 003 pre to 002 post 003 pre to 001 post yellow red yellow red yellow red SL 7 0 560 21 429 23 SH 0 0 0 0 0 0 LL 2 0 123 0 0 0 LH 0 0 2 0 2 0 In SL, several pixels exceed the red limit after flagging dead and warm pixels. These are all concentrated in the upper right corner of the blue PU subarray, and they are surrounded by a large number of pixels exceeding the yellow limit. The lack of a clearly defined Airy ring suggests that we have experienced a latent PU image. SL also suffers from some unusual jailbarring in the photoresponse ratio image from the first half of the campaign in the red PU array and along the right edge of the array beside the red PU array. LL shows what looks like a change in background emission in LL2, which has produced a number of shifts in apparent photoresponse on the order of 5% in the shutdown data. In LH, the same two pixels are misbehaving as in Campaign 3. The photoresponse of pixel 5,122 has decreased, and in pixel 49,109, it has increased.