Analysis of startup, shutdown and middle sequences, Campaign 32 Abstract: The arrays behaved in Campaign 32 much as in previous campaigns, with SL and LL exceeding their noise limit in at least half of the SUR read-noise tests (7 and 9 times out of 14, respectively), LH exceeding its limit 4 of 14 times, and SH passing all tests. For SL and LH, this is an improvement compared to the previous campaign. The stability and photo-response tests give results in line with previous campaigns. Analysts: Lei Hao & Greg Sloan Procedure version: 2.7 Campaign 32 , Startup, shutdown and middle anneal YEAR 2006 DOY 169 CE1 used for all data collection AORKEY = 19335936 for startup AORKEY = 19334912 for the first mid-campaign anneal sequence AORKEY = 19335424 for the second mid-campaign anneal sequence AORKEY = 19387648 for the third mid-campaign anneal sequence AORKEY = 19446528 for the forth mid-campaign anneal sequence AORKEY = 19446784 for the fifth mid-campaign anneal sequence AORKEY = 19335680 for shutdown 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 9.0 9.4 15.0 23.6 12.4 SH 8.8 7.2 7.5 15.0 12.9 12.9 LL 14.5 14.2 14.7 15.0 12.9 13.1 LH 12.0 12.0 11.7 15.0 12.9 12.9 Unruly.pro results for the_first_middle (IRS_002a): 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 7.8 9.2 15.0 12.2 12.2 SH 8.8 6.5 7.6 15.0 12.8 12.9 LL 14.5 15.3 14.5 15.0 13.1 13.0 LH 12.0 11.8 12.4 15.0 12.8 12.9 Unruly.pro results for the_second_middle (IRS_002b): 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 8.7 9.1 15.0 12.2 12.2 SH 8.8 7.2 7.1 15.0 12.9 12.9 LL 14.5 15.8 15.7 15.0 13.1 13.0 LH 12.0 12.0 11.8 15.0 12.8 12.9 Unruly.pro results for the_third_middle (IRS_002c): 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 8.5 9.0 15.0 12.2 12.3 SH 8.8 6.7 7.2 15.0 12.8 12.8 LL 14.5 14.4 15.3 15.0 13.1 13.0 LH 12.0 11.8 11.8 15.0 12.9 12.9 Unruly.pro results for the_forth_middle (IRS_002d): 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 8.5 9.1 15.0 12.4 12.3 SH 8.8 7.3 7.5 15.0 12.9 12.9 LL 14.5 16.2 14.4 15.0 13.0 13.1 LH 12.0 11.7 12.0 15.0 12.8 12.8 Unruly.pro results for the_fifth_middle (IRS_002e): 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 8.8 15.0 12.3 12.1 SH 8.8 7.2 7.1 15.0 12.8 12.9 LL 14.5 16.3 13.6 15.0 13.0 13.0 LH 12.0 12.6 11.4 15.0 12.8 12.8 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 7.4 10.1 15.0 12.3 12.4 SH 8.8 7.3 7.6 15.0 12.9 12.8 LL 14.5 15.5 14.4 15.0 13.0 13.0 LH 12.0 12.4 12.1 15.0 12.8 12.9 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: As in previous campaigns, the SRS results are all within the limits, but the SUR results are not as good. All SH SUR read-noise measurements are within the limit, as before. LH exceeds the limit in 4 of 14 cases, with 3 more cases right at the limit. SL failed in 7 of 14 tests, with 1 test at the limit. All of the post-anneal tests failed. LL performed even worse, exceeding the limit in 9 of 14 cases. The file IRS_001/rn.ps illustrates these problems. Changes in read noise between anneals and from startup to shutdown: SUR data SRS data 002c-pre/ 003-pre/ 003-pre/ 002c-pre/ 003-pre/ 003-pre/ Module 001-post 002c-post 001-post 001-post 002c-post 001-post SL 0.90 0.82 0.78 0.98 1.00 0.99 SH 0.89 1.03 0.98 0.99 1.01 1.00 LL 0.98 1.02 1.06 1.00 1.00 1.00 LH 1.01 1.05 1.06 1.00 0.99 0.99 Comments: These results are in line with previous campaigns, with all SRS tests showing good stability. In the SUR tests, SL showed variability in the camparisons using the shutdown sequence, exceeding the 20% yellow limit; otherwise it was well behaved. The variations in SH are small. The LL variations are larger than indicated here, because we use the middle anneal sequence as a default and others during the campaign showed worse variations. In reality, the LL variation is around the 20% yellow limit. LH varied less than 10% throughout the campaign. The file IRS_001/rn.ps shows these effects clearly. Photoresponse stability (using the middle campaign IRS_002c): Module 002c-pre to 001-post 003-pre to 002c-post 003-pre to 001-post yellow red yellow red yellow red SL 301 190 0 0 0 0 SH 0 0 0 0 0 0 LL 5960 6 17 8 17 8 LH 5 2 3 2 4 2 Comments: The photoresponse comparisons using the shutdown sequence results of 003/002c and 003/001 make good comparisons to prevous campaigns, with the LL orders barely visible. Still, 8 LL pixels are over the red limit. In the 002c/001 comparison, there are latent images of multiple circles at the upper right corner of the blue PU field in SL, causing over 100 red pixels. In the 002/001 comparison, the LL orders are clearly seen, with many pixels over the yellow limit. The red pixels are: (coordinates) [times] LL: (120,1) [3], (52,4) [3], (76,13) [2], (20,34) [2], (76,64) [1] (34,92) [2], (87,99) [1], (23,119) [3], (16,12) [2], (103,32) [1], (123,3) [1], (3,94) [1] LH: (8,84) [3], (84,114) [3]