A search for the optical counterpart of SAX J1805.5-2031
ATel #84; C. R. Powell, A. J. Norton, C. A. Haswell (Open University), S. T. Hodgkin (Cambridge)
on 22 Mar 2002; 16:45 UT
Credential Certification: Craig Powell (c.r.powell@open.ac.uk)
Subjects: Optical, X-ray, A Comment, Binary, Star, Transient, Variables
The X-ray transient SAX J1805.5-2031 was
reported in IAUC # 7843 on 6 March 2002, with
R.A. = 18h05m34s, Decl. = -20o30'.8 (equinox 2000),
uncertainty 1'.8. We took CCD photometry of this region
in R, V, and B on 2002 March 8 around 06:00 UT,
and March 9 between 05:20 and 06:30 UT, with the
Jacobus Kaptyn Telescope. No objects were
significantly brighter than they appeared on the Digitized
Sky Survey.
Reliable differential photometry was derived for 503 stars in the three bands.
No significant variability was detected between the two
nights in either B or R. A plot of B-V against R magnitudes
failed to reveal any anomalously blue candidates, and none
of the red outliers gave indication of variability.
An image of the field and B, V, and R magnitudes of the 503
stars are available at
http://physics.open.ac.uk/~crpowell/J18055-2031.html .
Photometry Results of the X-ray position of J1805.5-2031
