Analysis of startup, shutdown and middle sequences, Campaign 10 Abstract: All SRSRN results are within the limits, and the SURN results for SH and LL are also within limits. The SURN in SL exceeded the limit one time, and LH, as it has done since the latter part of Campaign 7, continues to exceed or meet the limit in the majority of cases, although the peak excess is only 0.6 DN (or 3% of the limit). The variation in SRSRN continues to be minimal, but the SURN variations for SL were 21%, exceeding the yellow limit of 20%. SH was close, with 18% variations, while LL and LH varied with a range of 4% or smaller. The photoresponse results are marred by latency effects in the second half of the campaign which may have affected all four modules. Both LL and LH had misbehaving pixels which have been noted in previous campaigns. Analsysts: Lei Hao & Greg Sloan Procedure version: 2.7 Campaign 10, Startup, Shutdown and Mid-campaign anneal YEAR 2004 DOY 194 CE1 used for all data collection AORKEY = 10072832 for startup AORKEY = 10072320 for the mid-campaign anneal sequence AORKEY = 10072576 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 8.5 15.0 12.2 12.3 SH 8.8 6.9 7.7 15.0 12.9 12.8 LL 14.5 11.3 13.2 15.0 12.7 12.9 LH 17.6 16.4 17.7 15.0 13.0 13.1 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 8.0 8.8 15.0 12.2 12.3 SH 8.8 6.5 7.9 15.0 12.8 12.8 LL 14.5 13.7 12.8 15.0 12.8 13.0 LH 17.6 18.2 18.2 15.0 13.1 13.1 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 7.0 8.9 15.0 12.3 12.3 SH 8.8 6.5 7.3 15.0 12.7 12.8 LL 14.5 13.0 13.3 15.0 12.7 12.9 LH 17.6 18.0 17.6 15.0 13.2 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, as in all previous campaigns. The SURN results for SH and LL are also within the limits, but SL and LH are more poorly behaved. SL exceeds the SURN limit once and meets it once, while LH fails in four of six cases and meets the limit once. These results are very similar to those for Campaign 9. 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 0.94 0.79 0.82 0.99 1.00 1.00 SH 0.85 0.82 0.85 1.00 0.99 0.99 LL 1.04 1.02 0.99 0.99 0.98 0.99 LH 1.03 0.99 1.02 1.00 1.01 1.01 Comments: SRSRN is still behaving well, with variations of only 2% or less. The SURN results are worse, with SL exceeding the 20% yellow limit in one case (from mid-campaign to shutdown). The variations in SH are also quite large, up to 18%, while the long-wavelength modules are better behaved, with variations of 4% or less. 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 0 0 2100 0 2320 0 SH 0 0 6 0 7 0 LL 2428 1 2967 3 4574 2 LH 4 1 4 2 13 2 The large number of pixels over the yellow limit when comparing the shutdown anneal sequence to earlier sequences results from a latent image in the SL shutdown data. The LL photoresponse ratio images continue to show what appear to be changes in background emission levels. Other than these problems, both LL and LH have one to three pixels which exceed the red limit, along with several more for each module which exceed the yellow limit. One's impression is that these arrays were hammered in the second half of the campaign. The misbehaving pixels in LL are: 76,64, 56,31 23,119, and 56,31. Pixel 76,64 failed consistently, and it has failed most of the time from Campaign 7 on. The other two pixels have also been noted in the past. The misbehaving pixels in LH are: 67,66, 57,15, and 15,74. Pixel 15,74 was noted in Campaign 9.