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Hubble Space Telescope
COS Airglow

In the ultraviolet, the sky background contains important contributions from airglow lines, which vary from day to night and as a function of HST orbital position. Airglow lines may be an important consideration for spectroscopic observations at wavelengths near the lines. Both FUSE and HUT observed a variety of FUV airglow lines which may be present in COS data. Please click here to view this list.

Observations

We have received requests for high-S/N observations of the geocoronal Lyman-alpha line profile observed with the G130M and G140L gratings. Such observations would allow users to model and subtract the line wings from their spectra. On this Web page, we provide a listing of both deliberate and serendipitous airglow observations. If you discover any others, please let us know! Email help@stsci.edu To retrieve these datasets please use the HST archive.

Deliberate Airglow Observations

In these programs, COS airglow exposures were taken in parallel with STIS calibration observations.

ProposalAssociationLifetime
Position
Exposure TimeOptical ElementCentral Wavelength
11860 LB87100601 2800s G140L1105
11999 LBC4020801 1388s G130M1309
11999 LBC4040401 2500s G130M1309
12414 LBN6E10601 0s G130M1309
12414 LBN6E20601 2900s G130M1309
12414 LBN6E30601 2800s G130M1291
12414 LBN6E40601 2800s G140L 1105
12775 LBW3E10601 2800s G130M1291
12775 LBW3E20601 2800s G130M1291
13145 LC4KE20602 2560s G130M 1291
13145 LC4KE40602 2900s G130M1291
13145 LC4KE10602 2900s G130M 1291
13145 LC4KE30602 2900s G130M 1291
12775 LBW3E40602 2800s G140L 1105
13548 LCETE10602 2900s G130M1327
13548 LCETE20602 2272s G130M1327
13548 LCETE30602 2900s G130M1327
13548 LCETE50602 2900s G130M1327
13548 LCETE40602 2900s G130M1327
13994 LCQJE30603 2900s G130M1291

Serendipitous Airglow Observations

Observations will be posted as they are released to the public.

ProposalAssociationLifetime
Position
Exposure TimeOptical Element Central Wavelength
11616LB6B290101954sG130M1291
11616LB6B290201954sG130M1327
11616LB6B290301642sG160M1577
11616LB6B290401642sG160M1600
11616LB6B290501642sG160M1623
12426LBNM0101012800sG160M1577
12426LBNM0102012850sG160M1589
12426LBNM0103012750sG160M1600
12426LBNM0104012800sG160M1611
12426LBNM0105013350sG160M1623
12275LBH40801011381sG130M1327
12275LBH40802015926sG130M1291
11727LB5B0101012070sG130M1309
11727LB5B0102012830sG160M1623
11522LB620301011150sG130M1291
11522LB620302011150sG130M1318
12034LBGH040101810sG130M1309
12034LBGH040201810sG130M1327
12034LBGH040301454sG160M1589
12034LBGH0404011280sG160M1600
12034LBGH0405011495sG160M1577
12870LC1VA801026944sG140L1105
12275LBH45801011381s G130M 1327
12275LBH4580201 5926sG130M 1291
12169LBIYAM0101 1460s G130M 1291