Per-Observation Source Region Aperture Photometry Draws File (photdraws3.fits)

The per-observation photdraws FITS file is named:

The per-observation source region aperture photometry file is named: 〈i〉〈s〉〈obs〉_〈obi〉N〈v〉[_〈c〉]_〈r〉〈b〉_photdraws3.fits

where 〈i〉 is the instrument designation, 〈s〉 is the data source; 〈obs〉 is the observation identification; 〈obi〉 is the observation interval identification; 〈v〉 is the data product version number; 〈c〉 is the cycle; 〈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 optional discriminator identified in square brackets is included only for ACIS alternating exposure (interleaved) mode observations.

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

unix% dmlist acisf13122_000N029_r0022b_photdraws3.fits blocks
 
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Dataset: acisf13122_000N029_r0022b_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).