Source Region Per-Stack Detections Image Files (regimg3.fits, regimg3.jpg)
The source region stacked image files consist of a set of FITS format image files, one for each source region of each stacked set of observations, for each science energy band. Each source region stacked image file is the image equivalent of the source region event file filtered by the appropriate science energy band and then ACIS observations are blocked by 1 and HRC observations are blocked by 2 in SKY coordinates. The resulting image is in flux units of photons s-1 cm-2 produced by subtracting the full-field background image in the appropriate science energy band from the filtered and blocked full-field event data and bound by the rectangular SKY region filter equivalent to the background region of interest (ROI) and further filtered by the corresponding stack-detected elliptical source region for the energy band, then dividing the result by the per-stack detections source region exposure map. A corresponding set of JPEG format image files are also produced for each source region equivalent to the source region FITS image file for each energy band.
Stacked ACIS Region Events Images
![[Thumbnail image: stacked ACIS region events image]](imgs/acisfJ0035508m433654_r0083_stk_regimg.png)
[Version: full-size]
Stacked ACIS Region Events Images
The stacked ACIS events images for the two observations of the region of interest.
The stacked observations region image FITS and JPEG files are named: 〈i〉〈s〉〈stkpos〉_〈stkver〉N〈v〉_〈r〉〈b〉_regimg3.fits and 〈i〉〈s〉〈stkpos〉_〈stkver〉N〈v〉_〈r〉〈b〉_regimg3.jpg
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.