Optical photometric observations of the Be/X-ray binary
ATel #1807; Ramanpreet Kaur (ARIES, Nainital), Brijesh Kumar (ARIES, Nainital), Biswajit Paul (RRI, Bangalore) and Ram Sagar (ARIES, Nainital)
on 23 Oct 2008; 18:56 UT
Credential Certification: B. Paul (bpaul@tifrvax.tifr.res.in)
Subjects: Optical, Binary, Neutron Star, Star, Transient
Referred to by ATel #: 7682
Optical observations of the transient Be/X-ray binary V0332+53 (ATel
#1792), was carried out using 1-m Sampurnanand telescope at ARIES,
Nainital. We observed the field in UBVRI bands for 4 hours since
19.287 hrs UT on 2008-10-21. To calibrate the photometry, we also
observed the SA95 and PG2213 Landolt (1992) standard fields during the
same night.
The transient source magnitudes during our observations are
U=17.49+/-0.02, B=17.17+/-0.01, V=15.41+/-0.01, R = 14.23+/-0.01 and
I=13.04+/-0.01. No brightness variation beyond 3-sigma is seen in the
UBVRI bands during these observations. In these five bands, the source
is about 0.25 magnitude brighter compared to its quiescent state
(Negueruela 1999, MNRAS, 307, 695), but fainter compared to some of
its previous outbursts (ATel #245, #388). We will continue photometric
monitoring of this source during this outburst.
