Analysis of startup, shutdown and middle sequences, Campaign 13 Abstract: This is the first campaign with two mid-campaign anneal sequences, since the campaign was 9 days long. All SRSRN results are within limits. The SH and LL SURN results are all within the limit. SL SURN data are within the limit except the shutdown sequence, especially before the anneal, where the read noise reached 10.6 DN. LH is still problematic, with 5 out of the 8 SURN measurements over the 17.6 DN limit. The pre-anneal of the first middle anneal is unusually high: 29.8DN, almost 70% over the limit. The cause is not jailbarring. These high SURN results raise the SL variations in noise properties over the yellow limit and the LH variations to 65% in the 002a-pre/001-post comparison, wel over the red limit. The SRSRN results remain stable, except LH with 7% variation between the two middle anneal sequences. This is the highest SRSRN variation observed to data. The photoresponse stability produces some unusual results. SH has a latent image of some emission lines in the second middle sequence. LH pixel 15,74 continues to fail. LL continues to exhibit poor stability, with the orders clearly visible. Three pixels exceed the red limit: 16,12, 13,72, and 23,119. SL shows latent images in the second middle anneal and the shutdown anneal. The latter latencies have produced some bizarre images in the red and blue PU arrays. Analysts: Lei Hao & Greg Sloan Procedure version: 2.7 Campaign 13, Startup, Shutdown and Mid-campaign anneal YEAR 2004 DOY 270 CE1 used for all data collection AORKEY = 12140288 for startup AORKEY = 12139520 for the first mid-campaign anneal sequence AORKEY = 12139776 for the second mid-campaign anneal sequence AORKEY = 12140032 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 8.6 8.6 15.0 12.2 12.2 SH 8.8 6.8 7.1 15.0 12.7 12.8 LL 14.5 11.1 11.6 15.0 12.8 12.8 LH 17.6 16.9 18.1 15.0 13.1 13.2 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 8.8 8.7 15.0 12.2 12.3 SH 8.8 6.8 7.2 15.0 12.7 12.7 LL 14.5 13.2 12.3 15.0 12.8 12.9 LH 17.6 29.8 17.4 15.0 13.1 14.1 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 8.2 8.6 15.0 12.3 12.2 SH 8.8 6.3 6.9 15.0 12.8 12.9 LL 14.5 12.2 12.7 15.0 13.1 12.9 LH 17.6 18.3 17.8 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 10.6 8.9 15.0 12.3 12.3 SH 8.8 6.7 7.8 15.0 12.8 12.9 LL 14.5 13.3 12.7 15.0 12.9 13.1 LH 17.6 17.9 17.3 15.0 13.2 13.3 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. Both SH and LL SUR results are good, with no case over the limit. SL behaves well except the shutdown sequence, where both the pre- and post-anneal data are over the limit, especially pre-anneal, which reaches 10.6 DN. LH is still problematic, with 5 out of 8 cases over the limit. Three of these failures are over 18 DN; one is at a terrible 29.8 DN. Jailbars are not causing this; the cause is not known. Changes in read noise between anneals and from startup to shutdown: SUR data 002apre/ 002bpre/ 002bpre/ 003pre/ 003pre/ 003pre/ Module 001post 001post 002apost 001post 002apost 002bpost SL 1.02 0.95 0.93 1.23 1.22 1.23 SH 0.96 0.88 0.87 0.95 0.93 0.98 LL 1.14 1.05 0.99 1.15 1.08 1.05 LH 1.65 1.01 1.05 0.99 1.03 1.01 SRSRN data 002apre/ 002bpre/ 002bpre/ 003pre/ 003pre/ 003pre/ Module 001post 001post 002apost 001post 002apost 002bpost SL 1.00 1.00 1.00 1.00 1.00 1.01 SH 0.99 1.00 1.01 1.00 1.01 1.00 LL 1.00 1.02 1.02 1.00 1.00 1.00 LH 1.00 1.00 0.93 1.01 0.94 1.01 Comments: The SRSRN results remain very stable, except LH, with 7% variation from 002bpre/002apost and 6% from 003pre/002apost. This is the highest SRSRN variation that has ever been seen. Because of the unusually high noise value of the SL SURN at the shutdown pre anneal and the LH SURN at the first middle pre anneal. All variations related with the two values are high: over the yellow limit for SL in 003-pre/001-post (23%), 003-pre/002a-post (22%) and 003-pre/002b-post (23%); and over the red limit (65%!!!) for LH in the 002a-pre/001-post. The remaining variations are within the i yellow limit. Photoresponse stability: Module 002a-pre to 001-post 002b-pre to 001-post 002b-pre to 002a-post yellow red yellow red yellow red SL 0 0 1021 15 973 17 SH 0 0 17 0 18 0 LL 2851 2 3229 3 1700 3 LH 5 1 5 1 4 1 Module 003-pre to 001-post 003-pre to 002a-post 003-pre to 002b-post yellow red yellow red yellow red SL 692 22 675 20 584 12 SH 0 0 0 0 0 0 LL 1330 3 449 4 477 2 LH 4 1 3 1 1 1 SH is generally behaving well, except that in the second middle anneal, it has a latent image of some emission lines, pushing 17 pixels over the yellow limit in the 002b-pre/001-post comparison and 18 pixel in the 002b-pre/002a-post comparison (see the saved ps plots in IRS_002b directory). The rest of the data are all fine, with no pixels exceeding either the yellow or red limits. LL continues to exhibit poor stability, with the orders clearly visible. Three pixels exceed the red limit: 16,12, 13,72, and 23,119. The first pixel, 16,12, failed in Campaigns 11 and 12. LH shows behavior similar to Campaign 12, with several pixels exceeding the yellow or red limits. The only LH pixel exceeding the red limit is 15,74, which has failed repeatedly in the past. SL shows strong latent images in all comparisons except the 002a-pre/001-post ratio (see the postscript files saved in the IRS_002b and IRS_003 directories). These latencies all but invalidate any efforts to look for changes in the detector properties. The latent image in the mid-campaign data is a blob at the edge of the red PU array. In the shutdown data, the latent image is very bizarre. It is a broad strip in the red PU array, and a double blob with three diagnal thin strips in the blue PU array, looking as though an alien cat has clawed our array. The cause of these latencies is not known.