NAME

velabox - FTOOL to select raw data files needed for FVELALC

USAGE

velabox long_src lat_src searchrad

DESCRIPTION

This FTOOL generates a list of Vela 5B raw data files which contain data within a specified radius of a position in the sky. The listed files should be FTPed from the HEASARC's Legacy computer (legacy.gsfc.nasa.gov; /vela5b/data/raw/) to the current directory before running FVELALC.

For further information regarding this task, current plans/schedule, comments or bug reports, please contact Jesse S. Allen (http://heasarc.gsfc.nasa.gov/cgi-bin/ftoolshelp).

PARAMETERS

long_src [real]

The galactic longitude (LII) of the source.

lat_src [real]

The galactic latitude (BII) of the source.

searchrad [real]

The search radius around the source position from which to include data. The recommended search radius is 5.0 degrees. At 5.0 degrees from the source, the collimator response function becomes so small that very little extra data can be collected at a greater radius, and collimator response corrections will greatly magnify the variance of this data. Larger radii also increase the likiehood of including data from a nearby source.

BUGS

None known

LOG OF SIGNIFICANT CHANGES

v1.0 (1995 Aug)

First release version. Minor bug in sorting routines excised.

v0.9 (1995 Jan)

Beta test version Uses shared routines with FVELALC and FVELMAP for searching

PRIMARY AUTHOR

     Jesse S. Allen
     Hughes STX
     HEASARC NASA/GFSC
     http://heasarc.gsfc.nasa.gov/cgi-bin/ftoolshelp

CATEGORY