2020MNRAS.492.2796E

Query : 2020MNRAS.492.2796E

2020MNRAS.492.2796E - Mon. Not. R. Astron. Soc., 492, 2796-2806 (2020/February-3)

First demonstration of OH suppression in a high-efficiency near-infrared spectrograph.

ELLIS S.C., BLAND-HAWTHORN J., LAWRENCE J.S., HORTON A.J., CONTENT R., ROTH M.M., PAI N., ZHELEM R., CASE S., HERNANDEZ E., LEON-SAVAL S.G., HAYNES R., MIN S.S., GIANNONE D., MADHAV K., RAHMAN A., BETTERS C., HAYNES D., COUCH W., KEWLEY L.J., McDERMID R., SPITLER L., SHARP R.G. and VEILLEUX S.

Abstract (from CDS):

Ground-based near-infrared (NIR) astronomy is severely hampered by the forest of atmospheric emission lines resulting from the rovibrational decay of OH molecules in the upper atmosphere. The extreme brightness of these lines, as well as their spatial and temporal variability, makes accurate sky subtraction difficult. Selectively filtering these lines with OH suppression instruments has been a long standing goal for NIR spectroscopy. We have shown previously the efficacy of fibre Bragg gratings (FBGs) combined with photonic lanterns for achieving OH suppression. Here we report on PRAXIS, a unique NIR spectrograph that is optimized for OH suppression with FBGs. We show for the first time that OH suppression (of any kind) is possible with high overall throughput (18 per cent end-to-end), and provide examples of the relative benefits of OH suppression.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): atmospheric effects - instrumentation: miscellaneous - instrumentation: spectrographs - techniques: spectroscopic - infrared: general

CDS comments: HIP 209960 is a probable misprint for HD 209960.

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 HD 194982 * 20 29 41.7288620232 -33 01 35.512767912   8.62 8.58     A0V 12 0
2 * 20 Cep PM* 22 05 00.4988376072 +62 47 08.416311036   6.699 5.265     K4III 88 0
3 HD 213030 * 22 28 53.5501614240 -16 09 07.224608880   8.80 8.76     A0V 17 0
4 NGC 7674 Sy1 23 27 56.6973043968 +08 46 44.253707772 13.84 13.92 13.23 12.64   ~ 738 2

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