12.4	Cycle 17 Calibration Program

The Cycle 17 calibration program continued the testing begun during SMOV. It included long-term programs to monitor the sensitivity and wavelength scale of both the NUV and FUV detectors. Midway through Cycle 17, additional calibration programs were added. Brief descriptions of these programs are presented in Table 12.2. A comprehensive review of the Cycle 17 calibration program will be published in an upcoming ISR (Osten et al. 2012).

Table 12.2: Cycle 17 Calibration Program

Program ID	Title	Accuracy Achieved	Products
11891	NUV MAMA Fold Distribution	< 5% in peak of fold distribution	None
11894	NUV Detector Dark Monitor	0.2% in global dark-rate uncertainty	ISR
11895	FUV Detector Dark Monitor	0.1% in global dark-rate uncertainty	ISR
11896	NUV Spectroscopic Sensitivity Monitor	min S/N of 30 per resel at λcen	COS ISR 2010-15, Reference file
11897	FUV Spectroscopic Sensitivity Monitor	S/N per resel of 30 at λcen for G140L and G130M; S/N ~ 23 for G160M	COS ISR 2010-15, Reference file
11899	NUV Imaging Sensitivity	S/N ~ 60, observed to predicted count-rate accuracy of ±1%	ISR, Reference file
11900	NUV Internal/External Wavelength Scale Monitor	7.2 to 15.5 pixel wavelength zero-point accuracy	ISR, Reference file
11997	FUV Internal/External Wavelength Scale Monitor	wavelength zero-point accuracy of 5.7–7.5 pixels for G130M, 5.8–7.2 for G160M, 7.5–12.5 for G140L	Calibration Workshop paper, Reference file
12010	COS FUV Line Spread Function Characterization	Continuum S/N = 9.2 near 1530 Å	COS ISR 2009-01, tables of LSF models
12052	COS NUV Grating Efficiency Test	Few percent uncertainty in count-rate ratios	Calibration Workshop paper, ISR
12080	G140L Focus Sweep	30% uncertainty in autocorrelation FWHM of spectra	ISR
12081	COS Flux Calibration Below 1150 Å with G140L/1280	3% for 900–1150 Å, 10% for 300–700 Å	ISR, Reference file
12082	Extending COS/ G130M Coverage Down to 905 Å with Two New Central Wavelengths	wavelength scale: ± 0.5 Å, sensitivity: ± 5–10%, resolution: 20–-30%	ISR, Reference file
12083	G140L/1280 Wavecal Template	N/A	Reference file
12084	G140L/1280 Internal-to- External Wavelength Scales	7.5–12.5 pixel wavelength zero-point accuracy	Reference file
12085	STIS/E230M Data to Determine Internal-to-External Offsets in COS/G230L	Unknown	Reference file
12086	Generation of 1-D Fixed-Pattern Templates	2%	Reference file, ISR
12096	COS FUV Detector Lifetime Position Test	min S/N per resel of 30 at λcen	ISR