12.4 COS Monitoring Programs

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An overview of the COS monitoring programs is given in Table 12.2 along with the ID numbers of completed programs. Table 12.3 lists COS contingency programs. Details on special calibration programs that were undertaken in a particular Cycle are given the appropriate subsection below. Instrument science reports (ISRs) detailing each cycle's calibration programs can be found on the COS website.
 

Table 12.2: COS Monitoring Calibration Program.  

TitleAccuracy AchievedProgram IDsProducts

NUV Monitors

NUV MAMA Fold Distribution

<5% at the location of the peak of the fold distribution

11891 (Cycle 17)
12419 (Cycle 18)
12723 (Cycle 19)
13128 (Cycle 20)
13531 (Cycle 21)
13976 (Cycle 22)
14444 (Cycle 23)
14526 (Cycle 24)
14943 (Cycle 25)
15539 (Cycle 26)
15777 (Cycle 27)
16328 (Cycle 28)
16536 (Cycle 29)

16936 (Cycle 30)
17318 (Cycle 31)

ISR

NUV Dark Monitor

<0.2% in the global dark rate uncertainty

11894 (Cycle 17)
12420 (Cycle 18)
12720 (Cycle 19)
13126 (Cycle 20)
13528 (Cycle 21)
13974 (Cycle 22)
14442 (Cycle 23)
14521 (Cycle 24)
14942 (Cycle 25)
15538 (Cycle 26)
15776 (Cycle 27)
16327 (Cycle 28)
16535 (Cycle 29)

16935 (Cycle 30)
17317 (Cycle 31)

ISR
Updated dark rates for the COS Exposure Time Calculator

NUV Spectroscopic Sensitivity Monitor

S/N ∼ 30 at λcen

11896 (Cycle 17)
12421 (Cycle 18)
12719 (Cycle 19)
13125 (Cycle 20)
13527 (Cycle 21)
13973 (Cycle 22)
14441 (Cycle 23)
14858 (Cycle 24)
15387 (Cycle 25)
15540 (Cycle 26)
15778 (Cycle 27)
16329 (Cycle 28)
16537 (Cycle 29)

16937 (Cycle 30)
17319 (Cycle 31)

ISR
Reference File

NUV Imaging Sensitivity

S/N ∼ 60, observed to a predicted countrate accuracy of 0.1%

11899 (Cycle 17)

ISR
Reference File

NUV Internal/External Wavelength Scale Monitor

1.7–3.7 pixels in wavelength scale accuracy

11900 (Cycle 17)
12422 (Cycle 18)
12722 (Cycle 19)
13127 (Cycle 20)
13529 (Cycle 21)
13975 (Cycle 22)
14443 (Cycle 23)
14859 (Cycle 24)
15388 (Cycle 25)
15541 (Cycle 26)
15779 (Cycle 27)
16330 (Cycle 28)
16538 (Cycle 29)

16938 (Cycle 30)
17320 (Cycle 31)

ISR
Reference File

NUV Flat Monitor

S/N = 20–25 per 3.3 pixel element

12721 (Cycle 19)

ISR

COS ACQ/IMAGE Performance Monitoring

WCA–PSA offsets to <0.5 pixels

13124 (Cycle 20)
13526 (Cycle 21)
13972 (Cycle 22)
14440 (Cycle 23)
14857 (Cycle 24)


 

NUV Target Acquisition Monitor

Offsets to <0.5 pixels

15389 (Cycle 25)
15542 (Cycle 26)
15780 (Cycle 27)
16331 (Cycle 28)
16539 (Cycle 29)

16939 (Cycle 30)
17321 (Cycle 31)		ISR

FUV Monitors

FUV Detector Gain Maps

0.1 pulse height bin

13525 (Cycle 21)
13970 (Cycle 22)
14439 (Cycle 23)
14519 (Cycle 24)
14941 (Cycle 25)
15534 (Cycle 26)
15772 (Cycle 27)
16323 (Cycle 28)
16829 (Cycle 29)

17248 (Cycle 30)
17325 (Cycle 31)

ISR

FUV Dark Monitor

Rate < 10−6 count/pixel/s
0.1% in global dark rate uncertainty

11895 (Cycle 17)
12423 (Cycle 18)
12716 (Cycle 19)
13121 (Cycle 20)
13521 (Cycle 21)
13968 (Cycle 22)
14436 (Cycle 23)
14520 (Cycle 24)
14940 (Cycle 25)
15533 (Cycle 26)
15771 (Cycle 27)
16322 (Cycle 28)
16828 (Cycle 29)

17247 (Cycle 30)
17324 (Cycle 31)

ISR
Updated dark rates for the COS Exposure Time Calculator

FUV Spectroscopic Sensitivity Monitor

S/N = 30 at λcen

11897 (Cycle 17)
12424 (Cycle 18)
12715 (Cycle 19)
13119 (Cycle 20)
13520 (Cycle 21)
13967 (Cycle 22)
14435 (Cycle 23)
14854 (Cycle 24)
15384 (Cycle 25)
15535 (Cycle 26)
15773 (Cycle 27)
16324 (Cycle 28)
16830 (Cycle 29)

17249 (Cycle 30)
17326 (Cycle 31)

ISR
Reference File

FUV Internal/External Wavelength Monitor

Wavelength zeropoint accuracies:
G130M: 5.7–7.5 pixels
G160M: 5.8–7.2 pixels
G140L: 7.5–12.5 pixels

11997 (Cycle 17)
12425 (Cycle 18)
12717 (Cycle 19)
13122 (Cycle 20)
13522 (Cycle 21)
13969 (Cycle 22)
14437 (Cycle 23)
14855 (Cycle 24)
15385 (Cycle 25)
15536 (Cycle 26)
15774 (Cycle 27)
16325 (Cycle 28)
16534 (Cycle 29)

17250 (Cycle 30)
17327 (Cycle 31)

ISR
Reference File

FUV Target Acquisition Monitor

Offsets to <0.5 pixels

15386 (Cycle 25)
15537 (Cycle 26)
15775 (Cycle 27)
16326 (Cycle 28)
16831 (Cycle 29)

16942 (Cycle 30)
17582 (Cycle 31)		ISR


Table 12.3: COS Contingency Programs.

TitleProgram IDs

NUV Detector Recovery after Anomalous Shutdown

11892 (Cycle 17)
12430 (Cycle 18)
12724 (Cycle 19)
13129 (Cycle 20)
13533 (Cycle 21)
13978 (Cycle 22)
14446 (Cycle 23)
14523 (Cycle 24)
14945 (Cycle 25)
15544 (Cycle 26)
15782 (Cycle 27)
16335 (Cycle 28)
16541 (Cycle 29)
17323 (Cycle 31)

FUV Detector Recovery after Anomalous Shutdown

11893 (Cycle 17)
12431 (Cycle 18)
12718 (Cycle 19)
13123 (Cycle 20)
13532 (Cycle 21)
13977 (Cycle 22)
14445 (Cycle 23)
14522 (Cycle 24)
14944 (Cycle 25)
15543 (Cycle 26)
15781 (Cycle 27)
16334 (Cycle 28)
16540 (Cycle 29)
17322 (Cycle 31)

COS FUV Characterization of Modal Gain When Changing High Voltage

16333 (Cycle 28)
16833 (Cycle 29)

17252 (Cycle 30)
17329 (Cycle 31)
COS FUV Change in Spectroscopic Sensitivity Trends

16332 (Cycle 28)
16832 (Cycle 29)

17251 (Cycle 30)
17328 (Cycle 31)
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