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Title:
A new Fabry-Perot spectrometer for observations of diffuse near-infrared line emission
Authors:
Luhman, M. L.; Jaffe, D. T.; Keller, L. D.; Pak, Soojong
Affiliation:
AAUniv. of Texas, Austin, TX, US ABUniv. of Texas, Austin, TX, US ACUniv. of Texas, Austin, TX, US ADUniv. of Texas, Austin, TX, US
Journal:
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 107, no. 708, p. 184-192 (PASP Homepage)
Publication Date:
02/1995
Category:
Instrumentation and Photography
Origin:
STI
NASA/STI Keywords:
FABRY-PEROT SPECTROMETERS, INFRARED SPECTROSCOPY, LINE SPECTRA, NEAR INFRARED RADIATION, BRIGHTNESS, HYDROGEN, SPECTRAL RESOLUTION
Bibliographic Code:
1995PASP..107..184L

Abstract

We describe a new Fabry-Perot spectrometer that is optimized for the detection of extended, low-surface-brightness line emission from 1.4 to 2.4 microns. The instrument combines high throughput and high sensitivity, yet limits the background radiation falling on the detector. The instrument has a single 20 sec - 200 sec beam and a resolving power lambda/delta(lambda) approximately 2500. The system is background shot-noise limited in the K window and limited by a combination of read noise, dark-current shot noise, and fluctuations in the OH airglow lines in the H window. We present sample data of some of the lowest-surface-brightness H2 line emission in the near infrared obtained to date.

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