Title of the paper: The seven year Swift-XRT point source catalog (1SWXRT)

Authors: V. D'Elia, M. Perri, S. Puccetti,
M. Capalbi, P. Giommi, D. N. Burrows, S. Campana,
G. Tagliaferri, G. Cusumano, P. Evans, N. Gehrels, J. Kennea,
A. Moretti, J. A. Nousek, J.P. Osborne, P. Romano and G. Stratta

Name of the journal, year, volume and first page:  2013, A&A, 551, 142

Key words of the paper: X-ray: general, Surveys, Catalogs.


The Table contains the 1SWXRT catalog of the serendipitous sources
detected in 7 years of Swift-XRT observations, acquired
between 2005 and 2011 and with exposure time longer than 500 seconds.

Description of the columns in Table:


  Column   Parameter          Description  

  1        NAME               source name: prefix 1SWXRT, following the standard IAU convention  
  2        TARGET_NAME        XRT field name   
  3        RA                 Swift-XRT Right Ascension in hms in the J2000  coordinate system  
  4        DEC                Swift-XRT Declination in hms in the J2000  coordinate system  
  5        SEQUENCE           Swift-XRT observation number  
  6        START_DATE         Start time of the field observations in year-month-day h:m:s  
  7        END_DATE           End time of the field observations in year-month-day h:m:s  
  8        F_RATE             0.3--10 keV count rate or 90 % upper limit in counts/sec  
  9        F_RATE_ERR         1 sigma 0.3--10 keV count rate error in counts/sec, in case of upper limits is set to -99  
  10       F_FLUX             0.5--10 keV Flux or 90 % in erg cm^-2s^-1    
  11       F_FLUX_ERR         1 sigma 0.5--10 keV Flux error in erg cm^-2s^-1, in case of upper limits is set to -99  
  12       F_PROB             0.3--10 keV detection probability  
  13       F_SNR              0.3--10 keV S/N   
  14       S_RATE             0.3--3 keV count rate or 90 % upper limit in counts/sec  
  15       S_RATE_ERR         1 sigma 0.3--3 keV count rate error counts/sec, in case of upper limits is set to -99   
  16       S_FLUX             0.5--2 keV Flux or 90 % upper limit in erg cm^-2s^-1  
  17       S_FLUX_ERR         1 sigma 0.5--2 keV Flux error in erg cm^-2s^-1, in case of upper limits is set to -99    
  18       S_PROB             0.3--13 keV detection probability  
  19       S_SNR              0.3--3 keV S/N   
  20       H_RATE             2--10 keV count rate or 90 % upper limit in counts/sec  
  21       H_RATE_ERR         1 sigma 2--10 keV count rate in counts/sec, in case of upper limits is set to -99  
  22       H_FLUX             2--10 keV Flux or 90 % upper limit in erg cm^-2s^-1  
  23       H_FLUX_ERR         1 sigma 2--10 keV Flux error in erg cm^-2s^-1, in case of upper limits is set to -99  
  24       H_PROB             2--10 keV detection probability  
  25       H_SNR              2--10 keV S/N  
  26       EXPOSURE           Total on-time in sec  
  27       HR                 hardness ratio = (h_rate-s_rate)/(h_rate+s_rate) (set to 99 if soft or hard counts are missing)   
  28       HR_ERR             1 sigma  hardness ratio error evaluated with the error propagation formula (see e.g. Bevington & Robinson 1992)  
  29       POS_ERR            Positional error at 68 % confidence level in arcsec  
  30       N_H                Galactic hydrogen column density in cm^-2  
  31       BETA               Energy spectral index (set to 99 if soft or hard counts are missing)  
  32       BETA_ERR           Energy spectral index error