Stack Source Region Draws Files (photdraws3.fits)

The stacked observations source region aperture photometry file is named: 〈i〉〈s〉〈stkpos〉_〈stkver〉N〈v〉_〈r〉〈b〉_photdraws3.fits

where 〈i〉 is the instrument designation; 〈s〉 is the data source; 〈stkpos〉 is the position component of the stack name, formatted as "Jhhmmsss{p|m}ddmmss"; 〈stkver〉 is the 3-digit version component of the stack name, formatted with leading zeros; 〈v〉 is the data product version number; 〈r〉 is the region ID, formatted as "rnnnn", where nnnn is the 4-digit region number, formatted with leading zeros; and 〈b〉 is the energy band designation.

The file contains draws for PHOTFLUX, SRC_CNTS, SRC_RATE, and energy FLUX from the combined ObsIDs in the stack, in separate FITS blocks as shown here:

unix% dmlist acisfJ0109587m455621_001N030_r0001b_photdraws3.fits blocks
 
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Dataset: acisfJ0109587m455621_001N030_r0001b_photdraws3.fits
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     Block Name                          	Type         Dimensions
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Block    1: PRIMARY                       Null        
Block    2: PHOTFLUXDRAWS	Table         8 cols x 5001     rows
Block    3: SRC_CNTSDRAWS	Table         8 cols x 5001     rows
Block    4: SRC_RATEDRAWS	Table         8 cols x 5001     rows
Block    5: FLUXDRAWS		Table         8 cols x 5001     rows

Draws are contained in the columns ampl_source and ampl_source90 (for aper90 quantities).