## Mission Overview

### Space Telescope and Optical Reverberation Mapping (STORM)

HLSP Authors: Gerard Kriss, Rachel Plesha

Released: 2019-07-19

Updated: 2019-07-19

Primary Reference(s):篮球竞猜盈利|湖南体育职业  &  &

DOI:

Citations:

Source Data:

## Overview

The Space Telescope and Optical Reverberation Mapping (STORM) Campaign used HST/COS, Swift, Chandra and ground-based facilities in a six-month long reverberation mapping experiment during 2014 to observe the active galactic nucleus (AGN) in the Seyfert 1 galaxy NGC 5548. The goal of the campaign was to resolve the structure of the broad-line region (BLR) and the continuum emission region in this AGN. This site provides calibrated spectra and models for NGC 5548 from the HST/COS observations obtained for the STORM campaign.  HST observations were made in single-orbit COS visits approximately daily from 2014 February 1 through July 27. Of the 179 scheduled visits, 171 observations were executed successfully. In each visit, the team used the G130M and G160M gratings to observe the UV spectrum over the range 1153—1796 Angstroms in four separate exposures. Exposure times were selected to provide S/N > 100 when measured over velocity bins of ~500 km/s. During each visit, the team obtained two 200-second exposures with G130M centered at 1291 Angstroms and 1327 Angstroms, and two 590-second exposures with G160M centered at 1600 Angstroms and 1623 Angstroms. As described by  the team customized the calibrations of these spectra to improve the wavelength calibration, the S/N with better flat fields, and more accurate and repeatable flux calibrations. These reprocessed spectra obtained with the various central wavelength and FPPOS settings were then combined into single spectra for G130M and G160M for each individual observation.

## Data Products

hlsp_storm_hst_cos_ngc-5548-go13330-<visit>_<grating>_v1_<exten>


where:

• <visit> is the visit number from the HST GO13330 program, e.g., "v01", "v0g", or "v74"
• <grating> is either "g130m", "g160m", or "g130m-g160m" if the product combines both gratings
• <exten> is the type of products, consult the table below for descriptions

Data file types:

 _binned.fits grating-combined spectra for a given visit, binned to 0.04 Angstroms _calibrated.fits calibrated spectra for a given visit and grating _model.fits model spectra for a given visit, used to remove intrinsic absorption from NGC 5548 and the ISM _absorption-lines.txt table of NGC 5548 intrinsic absorption line strengths _emission-lines.txt table of deblended emission line fluxes _combined.fits a combined spectrum of NGC 5548 using all available visits

## Citations

Please remember to cite the appropriate paper(s) below and the  if you use these data in a published work.

Note: These HLSP data products are licensed for use under .