Analysis of startup, shutdown and middle sequences, Campaign 19 Abstract: The results for Campaign 19 show two major effects when comparing to previous campaigns. First, three of the four modules have returned to values seen before the solar flare event which preceded Campaign 18. Second, LH shows degraded noise, likely the result of damage from the flare event. Otherwise, the results are similar to before. SRS read noise results are within limits. For SUR read noise, SH and LL within limits each test, SL exceeded its limit 3 times in 10, and LH failed every time (range: 17.9-20.3 DN). In the noise stability tests, results for the SRS data are fine, and in the SUR data, all modules except LL are well behaved. LL showed variations at the 16-21% level in all tests. The photoresponse tests shows some latent images in the SL PU fields. In LL, 6 pixels exceeded the variability limits (76,13, 76,64, 13,72, 87,99, 4.108, and 12,117), and in LH, 3 pixels exceeded the limit (120,41, 84,114, 15,74). Analysts: Lei Hao & Greg Sloan Procedure version: 2.7 Campaign 19, Startup, shutdown and middle anneal YEAR 2005 DOY 069 CE1 used for all data collection AORKEY = 13339136 for startup AORKEY = 13338112 for the first mid-campaign anneal sequence AORKEY = 13338368 for the second mid-campaign anneal sequence AORKEY = 13338624 for the third mid-campaign anneal sequence AORKEY = 13338880 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 8.5 9.2 15.0 12.3 12.5 SH 8.8 6.8 7.3 15.0 12.7 12.9 LL 14.5 13.3 11.5 15.0 13.0 12.9 LH 17.6 17.9 18.9 15.0 13.3 13.3 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 8.2 8.7 15.0 12.2 12.4 SH 8.8 7.2 6.9 15.0 12.9 12.7 LL 14.5 13.5 11.2 15.0 13.1 12.9 LH 17.6 19.4 20.0 15.0 13.2 13.2 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 8.5 9.2 15.0 12.2 12.3 SH 8.8 6.8 7.2 15.0 12.8 13.0 LL 14.5 13.3 11.7 15.0 12.7 13.1 LH 17.6 20.3 18.4 15.0 13.3 13.2 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 8.3 8.9 15.0 12.2 12.3 SH 8.8 6.9 7.0 15.0 12.8 12.8 LL 14.5 10.8 13.1 15.0 13.0 13.0 LH 17.6 18.8 18.6 15.0 13.2 13.2 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 8.4 8.5 15.0 12.3 12.1 SH 8.8 6.7 7.1 15.0 12.8 13.0 LL 14.5 13.9 12.1 15.0 13.0 13.1 LH 17.6 20.2 18.3 15.0 13.3 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 SRS noise tests are within the limit. In the SUR noise tests, SH and LL were within their limits in all tests. SL exceeded its limit in three cases out of ten, and LH failed every time, with results ranging from 17.9 to 20.3 DN. The 17.9 DN result is surprisingly close to the 17.6 DN limit. LH almost passed once! Comparison to previous campaigns: Comparing to the average SURN in all anneal sequences in Campaigns 15-17 to those in Campaign 18, excluding the start-up sequence, gives the following results: Average for Average for Average for Camp. 15-17 Camp. 18 Camp. 19 Module (excluding start-up) SL 8.8 +/- 0.6 8.8 +/- 0.5 8.7 +/- 0.4 SH 7.0 +/- 0.5 7.1 +/- 0.3 7.0 +/- 0.2 LL 12.6 +/- 0.9 13.1 +/- 1.3 12.4 +/- 1.1 LH 18.3 +/- 0.6 18.9 +/- 0.6 19.1 +/- 0.9 SL and SH have the same averages as before, while LL and LH are elevated slightly (0.5 and 0.6 DN respectively). It remains to be seen if the slight increase in LL and LH is an indication of permanent degradation of the detectors. Changes in read noise between anneals and from startup to shutdown (using the second mid-campaign seqeunce, which we have called IRS-002b): SUR data SRS data 002b-pre/ 003-pre/ 003-pre/ 002b-pre/ 003-pre/ 003-pre/ Module 001-post 002b-post 001-post 001-post 002b-post 001-post SL 0.93 0.91 0.91 0.98 1.00 0.98 SH 0.93 0.92 0.92 1.00 0.99 1.00 LL 1.16 1.19 1.21 0.99 0.99 1.01 LH 1.07 1.09 1.06 1.01 1.01 1.00 Comments: All SRS noise stability tests are within limits. All but one of the SUR noise stability tests are also within limits. The exception is one of the LL tests, which is barely over the 20% limit. Both of the other LL comparisons are also high. Photoresponse stability (using the middle middle IRS_002b): Module 002b-pre to 001-post 003-pre to 002b-post 003-pre to 001-post yellow red yellow red yellow red SL 3339 0 1144 0 1348 0 SH 0 0 0 0 0 0 LL 6067 4 2430 3 3940 6 LH 20 3 6 1 13 2 Comments: The SL 002b/001 comparison does not have latent images, but the PU fields are bright. In the 003/002b and 003/001 comparisons, there are weird latent images in the PU field, as though an object tracked across the field. The SH results continue to be good. As usual, the LL orders are clearly visible. In LH, the orders are also visible, but only weakly. The pixels exceeding the red limit in LL and LH are: LL: (76,13) [3], (76,64) [2], (13,72) [2], (87,99) [2], (4,108) [2], (12,117) [2] LH: (120,41) [2], (84,114) [3], (15,74) [1] The number of failures for a pixel is given in square brackets.