The Hubble Legacy Archive NICMOS Grism Data
Wolfram Freudling, Martin K\"ummel, Jonas Haase, Richard Hook, Harald, Kuntschner, Marco Lombardi, Alberto Micol, Felix Stoehr, Jeremy Walsh

TL;DR
The paper describes the calibration, data reduction, and public release of NICMOS G141 grism spectra from the Hubble Legacy Archive, facilitating access to slitless spectroscopy data for nearly 2000 targets.
Contribution
It provides detailed methods for extracting calibrated spectra from HST NICMOS slitless data and makes these data publicly accessible via VO interfaces.
Findings
2470 spectra of 1923 targets released
Spectra quality validated against IR catalogs and spectroscopy
Data accessible through web and VO interfaces
Abstract
The Hubble Legacy Archive (HLA) aims to create calibrated science data from the Hubble Space Telescope archive and make them accessible via user-friendly and Virtual Observatory (VO) compatible interfaces. It is a collaboration between the Space Telescope Science Institute (STScI), the Canadian Astronomy Data Centre (CADC) and the Space Telescope - European Coordinating Facility (ST-ECF). Data produced by the Hubble Space Telescope (HST) instruments with slitless spectroscopy modes are among the most difficult to extract and exploit. As part of the HLA project, the ST-ECF aims to provide calibrated spectra for objects observed with these HST slitless modes. In this paper, we present the HLA NICMOS G141 grism spectra. We describe in detail the calibration, data reduction and spectrum extraction methods used to produce the extracted spectra. The quality of the extracted spectra and…
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