11.5.4 COS WAVECAL Exposure Parameters

This article lists the exposure times and current settings for the wavelength calibration lamp exposures as a function of spectral element and central wavelength.

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Boldface type indicates the name of an APT parameter or a value for a parameter.

(red star) Black text indicates an important note.

Magenta text indicates available but unsupported parameters (requires prior approval from STScI).

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Brown text indicates text file parameters.

Items in brackets - <value> - are required values.

Items in square brackets - [<value>] - are optional.

Table 11.8: WAVECAL Exposure Parameters lists the exposure times and current settings for the wavelength calibration lamp exposures as a function of spectral element and central wavelength.

Table 11.8: WAVECAL Exposure Parameters

GratingCentral WavelengthLamp Current SpecificationExposure Time (seconds)1BUFFER TIME (sec)Flash Duration (sec)

G130M

1055

MEDIUM

142

510

142

1096

MEDIUM

52

180

52

1222

MEDIUM

52

120

52

1291

MEDIUM

12

120

12

1300

MEDIUM

12

120

12

1309

MEDIUM

12

120

12

1318

MEDIUM

12

120

12

1327

MEDIUM

12

120

12

G160M

1533

MEDIUM

12

120

12

1577

MEDIUM

12

120

12

1589

MEDIUM

12

120

12

1600

MEDIUM

12

120

12

1611

MEDIUM

12

120

12

1623

MEDIUM

12

120

12

G140L

800

MEDIUM

7

120

7

1105

MEDIUM

7

120

7

1230

MEDIUM

7

120

7

1280

MEDIUM

7

120

7

G185M















1786

MEDIUM

12

220

12

1817

MEDIUM

12

220

12

1835

MEDIUM

12

240

12

1850

MEDIUM

22

180

22

1864

MEDIUM

32

180

32

1882

MEDIUM

17

120

17

1890

MEDIUM

12

120

12

1900

MEDIUM

22

140

22

1913

MEDIUM

17

140

17

1921

MEDIUM

12

140

12

1941

MEDIUM

12

180

12

1953

MEDIUM

17

180

17

1971

MEDIUM

17

180

17

1986

MEDIUM

12

180

12

2010

MEDIUM

12

180

12

G225M













2186

MEDIUM

7

120

7

2217

MEDIUM

12

120

12

2233

MEDIUM

7

120

7

2250

MEDIUM

22

120

22

2268

MEDIUM

12

120

12

2283

MEDIUM

12

120

12

2306

MEDIUM

12

120

12

2325

MEDIUM

12

280

12

2339

MEDIUM

12

280

12

2357

MEDIUM

12

240

12

2373

MEDIUM

22

240

22

2390

MEDIUM

7

240

7

2410

MEDIUM

7

280

7

G285M

2617

MEDIUM

12

300

12

















2637

MEDIUM

12

300

12

2657

MEDIUM

7

300

7

2676

MEDIUM

22

300

22

26 95

MEDIUM

22

330

22

2709

MEDIUM

12

330

12

2719

MEDIUM

7

330

7

2739

MEDIUM

7

430

7

2850

MEDIUM

22

430

22

2952

MEDIUM

7

430

7

2979

MEDIUM

17

430

17

2996

MEDIUM

17

140

17

3018

MEDIUM

22

140

22

3035

MEDIUM

27

160

27

3057

MEDIUM

32

160

32

3074

MEDIUM

32

160

32

3094

MEDIUM

32

160

32

G230L




2635

MEDIUM

7

100

7

2950

MEDIUM

7

180

7

3000

MEDIUM

7

180

7

3360

MEDIUM

12

140

12

MIRRORA

N/A

LOW

7

80

7

MIRRORB

N/A

MEDIUM

12

80

12

1 Based on Kenneth Sembach, "Cosmic Origins Spectrograph PtNe Wavelength Calibration Exposure Times," COS Technical Instrument Report 2006-01 (v1)

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