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psf_sm2_#_#.fits

\fbox{Location}

caldb/data/asca/xrt/bcf/psf

\fbox{Status}

Current

\fbox{Summary of Files}

A total of 11 files representing 11 pointings at Cyg X-1 carried out during the AO phase of the mission. Each file consists of a 10 2-dimensional (63x63) Point Spread Function images, one at each of 10 energy ranges.

The file naming convention used is:

psf_sm2_$i$_$j$.fits
where It should be noted that the set of pointing positions do not form a regular grid.

\fbox{Delivered to CALDB by:}

Keith Arnaud (NASA/GSFC ASCA GOF) 1995 Feb 14.

\fbox{File Format}

HDUDOC/VERS = CAL/GEN/92-027/1.0.0
(see CAL/GEN/92-027, available on-line as postscript and html versions).

\fbox{Input Datasets, Assumptions, {\it etc}}

These files were converted to OGIP format by Keith Arnaud (NASA/GSFC ASCA GOF) from an original file (allpsf.sm2.fits) provided by Maxim Markevitch (ISAS). As stated above, the datasets were generated from observations of Cyg X-1 using the GIS instruments. The background was subtracted, the images were then normalized to have 1 photon within the 6 arcmin off-peak radius, and then smoothed before binning with the energy-dependent, position-independent Gaussian to compensate for the GIS energy-dependent detector resolution.

\fbox{Points to Note}


next up previous contents
Next: BCF: XRT Encircled Energy Up: BCF: XRT 2-D Point Previous: astrod_image_#_#.fits   Contents
Mike Corcoran 2001-08-30