Table HLSP_UVOTSSC.Sources
Description: Table of sources from the Swift UVOT Serendipitous Source Catalog (UVOTSSC) High Level Science Product. See the UVOTSSC MAST project page at: https://archive.stsci.edu/prepds/uvotssc/.
Name	Data Type	Size	Description
IAUNAME	varchar	26	Individual source identification strings in the conventions of the International Astronomical Union. For each source, its name starts from the string UVOTSSC1 characterising the sources as obtained from the NASA SWIFT mission with the UVOT telescope, version 1.
N_SUMMARY	int	4	Reference number of the observation summary given in the table HLSP_UVOTSSC.Summary (i.e., this is the entry number of the HLSP_UVOTSSC.Summary table).
OBSID	varchar	11	Unique observation identification number corresponding to the observation in which the source was detected.
NFILT	int	4	Number of the UVOT filters included into this source observation.
SRCNUM	int	4	Unique source number throughout the UVOTSSC source catalogue (please note that the number of entries in the SOURCES table is larger that the total number of individual sources)
RA	float	8	Right Ascension (J2000) of each source in degrees. All the entries in the table are in order of increasing RA value.
DEC	float	8	Declination (J2000) of each source in degrees.
RA_ERR	real	4	Standard errors (in arcseconds) of the source RA position
DEC_ERR	real	4	Standard errors (in arcseconds) of the source DEC position
UVW2_SRCDIST	real	4	Distance (arcseconds) to closest neighbouring source detected in that filter (search limited to 30 arcseconds radius)
UVM2_SRCDIST	real	4	Distance (arcseconds) to closest neighbouring source detected in that filter (search limited to 30 arcseconds radius)
UVW1_SRCDIST	real	4	Distance (arcseconds) to closest neighbouring source detected in that filter (search limited to 30 arcseconds radius)
U_SRCDIST	real	4	Distance (arcseconds) to closest neighbouring source detected in that filter (search limited to 30 arcseconds radius)
B_SRCDIST	real	4	Distance (arcseconds) to closest neighbouring source detected in that filter (search limited to 30 arcseconds radius)
V_SRCDIST	real	4	Distance (arcseconds) to closest neighbouring source detected in that filter (search limited to 30 arcseconds radius)
N_OBSID	int	4	The number of individual observations (ObsIDs) in which the source was detected. This should correspond to the number of entries for that particular source in the HLSP_UVOTSSC.Summary table.
UVW2_SIGNIF	real	4	Source significance (signal-to-noise)
UVM2_SIGNIF	real	4	Source significance (signal-to-noise)
UVW1_SIGNIF	real	4	Source significance (signal-to-noise)
U_SIGNIF	real	4	Source significance (signal-to-noise)
B_SIGNIF	real	4	Source significance (signal-to-noise)
V_SIGNIF	real	4	Source significance (signal-to-noise)
UVW2_VEGAMAG	real	4	Vega system magnitude
UVM2_VEGAMAG	real	4	Vega system magnitude
UVW1_VEGAMAG	real	4	Vega system magnitude
U_VEGAMAG	real	4	Vega system magnitude
B_VEGAMAG	real	4	Vega system magnitude
V_VEGAMAG	real	4	Vega system magnitude
UVW2_ABMAG	real	4	AB system magnitude
UVM2_ABMAG	real	4	AB system magnitude
UVW1_ABMAG	real	4	AB system magnitude
U_ABMAG	real	4	AB system magnitude
B_ABMAG	real	4	AB system magnitude
V_ABMAG	real	4	AB system magnitude
UVW2_MAG_ERR	real	4	error on the magnitude
UVM2_MAG_ERR	real	4	error on the magnitude
UVW1_MAG_ERR	real	4	error on the magnitude
U_MAG_ERR	real	4	error on the magnitude
B_MAG_ERR	real	4	error on the magnitude
V_MAG_ERR	real	4	error on the magnitude
UVW2_FLUX	real	4	Flux in erg/s/cm^2/Angstrom. The conversion factors to flux were calculated using GRB model spectra folded through the effective area curves. Please note that these factors may not be appropriate for all spectral types.
UVM2_FLUX	real	4	Flux in erg/s/cm^2/Angstrom. The conversion factors to flux were calculated using GRB model spectra folded through the effective area curves. Please note that these factors may not be appropriate for all spectral types.
UVW1_FLUX	real	4	Flux in erg/s/cm^2/Angstrom. The conversion factors to flux were calculated using GRB model spectra folded through the effective area curves. Please note that these factors may not be appropriate for all spectral types.
U_FLUX	real	4	Flux in erg/s/cm^2/Angstrom. The conversion factors to flux were calculated using GRB model spectra folded through the effective area curves. Please note that these factors may not be appropriate for all spectral types.
B_FLUX	real	4	Flux in erg/s/cm^2/Angstrom. The conversion factors to flux were calculated using GRB model spectra folded through the effective area curves. Please note that these factors may not be appropriate for all spectral types.
V_FLUX	real	4	Flux in erg/s/cm^2/Angstrom. The conversion factors to flux were calculated using GRB model spectra folded through the effective area curves. Please note that these factors may not be appropriate for all spectral types.
UVW2_FLUX_ERR	real	4	Flux error in erg/s/cm^2/Angstrom.
UVM2_FLUX_ERR	real	4	Flux error in erg/s/cm^2/Angstrom.
UVW1_FLUX_ERR	real	4	Flux error in erg/s/cm^2/Angstrom.
U_FLUX_ERR	real	4	Flux error in erg/s/cm^2/Angstrom.
B_FLUX_ERR	real	4	Flux error in erg/s/cm^2/Angstrom.
V_FLUX_ERR	real	4	Flux error in erg/s/cm^2/Angstrom.
UVW2_MAJOR	real	4	Mean full-width-half-maximum of the source along the major-axis (in arcseconds)
UVM2_MAJOR	real	4	Mean full-width-half-maximum of the source along the major-axis (in arcseconds)
UVW1_MAJOR	real	4	Mean full-width-half-maximum of the source along the major-axis (in arcseconds)
U_MAJOR	real	4	Mean full-width-half-maximum of the source along the major-axis (in arcseconds)
B_MAJOR	real	4	Mean full-width-half-maximum of the source along the major-axis (in arcseconds)
V_MAJOR	real	4	Mean full-width-half-maximum of the source along the major-axis (in arcseconds)
UVW2_MINOR	real	4	Mean full-width-half-maximum of the source along the minor-axis (in arcseconds)
UVM2_MINOR	real	4	Mean full-width-half-maximum of the source along the minor-axis (in arcseconds)
UVW1_MINOR	real	4	Mean full-width-half-maximum of the source along the minor-axis (in arcseconds)
U_MINOR	real	4	Mean full-width-half-maximum of the source along the minor-axis (in arcseconds)
B_MINOR	real	4	Mean full-width-half-maximum of the source along the minor-axis (in arcseconds)
V_MINOR	real	4	Mean full-width-half-maximum of the source along the minor-axis (in arcseconds)
UVW2_POSANG	real	4	Position-angle of the major-axis of the source, measured in degrees anti-clock wise from the Right-Ascension axis
UVM2_POSANG	real	4	Position-angle of the major-axis of the source, measured in degrees anti-clock wise from the Right-Ascension axis
UVW1_POSANG	real	4	Position-angle of the major-axis of the source, measured in degrees anti-clock wise from the Right-Ascension axis
U_POSANG	real	4	Position-angle of the major-axis of the source, measured in degrees anti-clock wise from the Right-Ascension axis
B_POSANG	real	4	Position-angle of the major-axis of the source, measured in degrees anti-clock wise from the Right-Ascension axis
V_POSANG	real	4	Position-angle of the major-axis of the source, measured in degrees anti-clock wise from the Right-Ascension axis
UVW2_EXTENDED	int	1	Whether or not the source is considered extended, which was determined by comparing the source major axis with the size of the UVOT point spread function.
UVM2_EXTENDED	int	1	Whether or not the source is considered extended, which was determined by comparing the source major axis with the size of the UVOT point spread function.
UVW1_EXTENDED	int	1	Whether or not the source is considered extended, which was determined by comparing the source major axis with the size of the UVOT point spread function.
U_EXTENDED	int	1	Whether or not the source is considered extended, which was determined by comparing the source major axis with the size of the UVOT point spread function.
B_EXTENDED	int	1	Whether or not the source is considered extended, which was determined by comparing the source major axis with the size of the UVOT point spread function.
V_EXTENDED	int	1	Whether or not the source is considered extended, which was determined by comparing the source major axis with the size of the UVOT point spread function.
UVW2_QUALITY_FLAG	int	2	See list below for usage.
UVM2_QUALITY_FLAG	int	2	See list below for usage.
UVW1_QUALITY_FLAG	int	2	See list below for usage.
U_QUALITY_FLAG	int	2	See list below for usage.
B_QUALITY_FLAG	int	2	See list below for usage.
V_QUALITY_FLAG	int	2	See list below for usage.
Each source has an associated "Quality flag" which is given in the final columns of the HLSP_UVOTSSC.Sources table. The flag bit values are shown in the table below. Multiple flags are summed to give the final quality flag value. Examples of usage: Quality value = 1 - Source contains one or more bad pixels Quality value = 3 - Source contains one or more bad pixels and lies on a read-out streak Quality value = 7 - Source contains one or more bad pixels and lies on a read-out streak and lies within a "smoke-ring" region.