## Mission Overview

### Kepler-Swift Active Galaxies and Stars Survey (KSwAGS)

Primary Investigator: Krista Lynne Smith

HLSP Authors: Krista Lynne Smith, Betsy Tian

Released: 2019-10-23

Updated: 2019-10-23

Primary Reference(s): Tian et al. (2019) & Smith et al. (2015)

## Overview

The Kepler-Swift Active Galaxies and Stars (KSwAGS) survey of four modules of the original Kepler FOV was conducted by Swift-XRT to find new active galactic nuclei for Kepler monitoring. The X-ray survey results were reported in Smith et al. 2015. Due to the co-aligned UVOT telescope on the Swift spacecraft, an ultraviolet survey of the Kepler field was conducted simultaneously in the uvm2 filter at 2246 Angstroms. The catalog includes the full reduced UV survey. It contains more than three times as many sources as GALEX NUV archival data in the Kepler field, including 17,000 sources with Kepler 30-minute light curves.

## Data Products

The catalog file follows this naming convention:

hlsp_kswags_swift_uvot_all_uvm2_v1_catalog.fits

Data file types:

 _catalog.fits The KSwAGS catalog of uvm2 sources

The catalog contains 39,725 sources, and includes fluxes, statistical uncertainties, and systematic uncertainties as both magnitudes and fluxes in ergs/s/cm^2/Angstrom.  The statistical uncertainty is the 1-sigma error of the flux or magnitude value. The systematic uncertainty is a parameter added by the HEASARC task "uvotsource" that accounts for the effect of a variable UVOT PSF to the corrected count rate. At the time of the reduction of this survey, this was estimated using a postulated fractional rms variation of the FWHM of a point source of 5%.

Note: The source of magnitude zero-points in the FITS header comes from https://swift.gsfc.nasa.gov/analysis/uvot_digest/zeropts.html.

## Data Access

File Size

hlsp_kswags_swift_uvot_all_uvm2_v1_catalog.fits

2.5 MB

## Citations

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

Note: These HLSP data products are licensed for use under CC BY 4.0.