[vsnet-chat 7390] Re: [cvnet-discussion] Re: [vsnet-outburst 8529] OT_J041109.4-591117

[Sebastian Otero]

> OT_J041109.4-591117:
>
>   Is anyone following the var/Ret object (2005) in
>
> http://www.cfa.harvard.edu/iau/unconf/cbat_unconf.html ?
>
>   discovery mag 12.2
>
>   This object as a bright ROSAT counterpart.
>
> 041110.2 -591112 (2000.0) 1RXS_J041110.2-591113 0.065 0.37 0.21


The star is ASAS 041109-5911.3 and has 10 outbursts recorded in ASAS data:
http://www.astrouw.edu.pl/cgi-gp/asas_variable/041109-5911.3,asas3,0,0,600,300,0

HJD-2450000    V

1876.64805     13.762

1920.58290     14.326

1979.51434     13.358

2106.87588     13.590
2106.87758     13.569

2168.85989     13.483
2169.81618     13.443

2733.52456     13.604
2733.52732     13.726

2915.77200     14.347

2982.70369     13.940

3023.54460     13.404
3023.58580     13.350

3811.55440     14.374

A typical maximum magnitude seems to be V= 13.4 although the ASAS observing
regime doesn't help. Outbursts are frequent, with a possible cycle arpund
40-65 days.
The star can be identified as
UCAC2 05741046 = 2MASS J04110925-5911162 = USNO-B1.0 0308-0027257
UCAC2 position is 04 11 09.242 -59 11 16.22 (J2000.0)
The astrometric catalogues give approximated magnitudes ranging from 15 to
17th mag. NOMAD gives a B-V of -0.1 from the YB6 (B= 17.0; V= 17.1)
catalogue but 2MASS colors are somewhat red (J-K 1.0; J= 15.9; K= 14.9)
though they could be wrong due to the star being variable. Actually the
UCAC2 entry, which should be only some tens of a magnitude off (brigther)
from V is 12.79 (!!) implying that it was observed in outburst.

The ASAS lightcurve excludes a red variable for this case.

Best wishes,
Sebastian.