[vsnet-id 632] Re: [vsnet-sequence 149] (fwd) 1RXP J113123+4322.5 CCD Photometry and Astrometry (D. West)

[Brian Skiff <Brian.Skiff@lowell.edu>]

>> The position of 1RXP J113123+4322.5 was measured to be 11 31 22.09
>> +43 22 36.1 ....
>>  Both the photometry and astrometry is a 
>> combination of the star under study and a faint companion
>> that is at a separation of 5.14" and a position angle of 347 degrees.

     If the variable is the southeastern of the pair, then it is identifiable
in the 2MASS catalogue at:  11 31 22.54  +43 22 33.3 (2000, uncertainty ~0".2).
The J-K color is 0.75 (fairly red), with K=12.65.  This is presumably the
signature of the cool companion, the J-K color implying a K5/M0 dwarf---
about what you expect.
     The companion is at 5".4 (2MASS), with K=14.8 and J-K=0.6.  This star
is shown in GSC-2.2 with photo-blue mag 17.9.  If the J-K color is accurate,
then one would expect V ~17.0 for this star; the J-K color is consistent
with an early-K dwarf, probably unrelated to the CV.

\Brian

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