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XMM-Newton Science Analysis System Page: 1
bstools
August 16, 2005
Abstract
Collection of tools to support boresight misalignment calibration
1 Instruments/Modes
Instrument Mode
EMOS1/EMOS2 n/a
EPN n/a
RGS n/a
OM n/a
2 Use
pipeline processing no
interactive analysis no
CCF maintenance yes
3 Description
The bstools package contains a small set of programs to support boresight misalignment calibration
activities. The following tools are available:
3.1 strbs: Star Tracker BoreSight calculation
 SYNOPSIS
strbs instrument= ra= dec= apos= odffixout=true|false
bstoolsout=true|false
 DESCRIPTION
Given the prime instrument instr and its viewing direction in terms of Right Ascension
and Declination of the boresight + astronomical position angle strbs computes the viewing
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direction of the star tracker and associated position angle - result is written to stdout in
verbose form (default) or as an odфx command line if odffixout=true or as an insbs
command line if bstoolsout=true.
The Right Ascension/Declination of the instrument boresight can be entered in either of the
forms
23h59m48.12s / 45o38'14.55"
or decimal degrees:
123.23445 / 45.238474
Position angles have to be entered in decimal degrees.
 REFERENCE
See task epicbscalgen and cal documentation for denition of boresight related coordinate
frames.
3.2 insbs: INStrument BoreSight calculation
 SYNOPSIS
insbs instrument= ra= dec= apos= bstoolsout=true|false
 DESCRIPTION
Given the viewing direction of the star tracker in terms of Right Ascension and Declination
of the boresight + astronomical position angle insbs computes the viewing direction of the
instrument specied via the instrument parameter - result is written to stdout in verbose
form (default) or as a strbs (see Sect. 3.1) command line if bstoolsout=true.
The Right Ascension/Declination of the star tracker boresight can be entered in either of
the forms
23h59m48.12s / 45o38'14.55"
or decimal degrees:
123.23445 / 45.238474
Position angles have to be entered in decimal degrees.
 REFERENCE
See task epicbscalgen and cal documentation for denition of boresight related coordinate
frames.
3.3 srcinfov: compute position of SouRCe in Field Of View
 SYNOPSIS
srcinfov strra= strdec= apos= withsrccoord=true|false
srcra= srcdec=
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 DESCRIPTION
srcinfov computes for each instrument the position of a given celestial source in the eld of
view (in TELCOORD coordinates). Input is the satellite attitude in terms of Right Ascen-
sion/Declination of the star tracker viewing direction and astronomical position angle [deg].
The boolean parameter withsrccoord determines whether the J2000 equatorial coordinates
of the celestial source are explicitly provided through the parameters srcra and srcdec or
taken as the star tracker viewing direction. Right Ascension/Declination of the star tracker
boresight and the celestial source can be entered in either of the forms
23h59m48.12s / 45o38'14.55"
or decimal degrees:
123.23445 / 45.238474
 REFERENCE
See task epicbscalgen and cal documentation for denition of boresight related coordinate
frames.
3.4 opticsxy: compute optical axis/focal plane intersection point
 SYNOPSIS
opticsxy
 DESCRIPTION
opticsxy computes for each instrument the intersection point of the optical axis of the
respective telescope and the focal plane. The result in given in CHIPCOORD coordinates
of the CCD containing the intersection point. The numbers can be used as CCD MiscData
attributes OPTICS X/OPTICS Y (+OPTICS CCD).
 REFERENCE
See task epicbscalgen and cal documentation for denition of boresight related coordinate
frames.
4 Comments
none.
5 Future developments
add more tools
References
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