[vsnet-alert 10419] Re: possible new cataclythmic variable in Taurus

[Hiroyuki Maehara]

 According to the ASAS data, the object was in outburst (V=13.5)
on Aug. 4.42 and  fainter than the detection limit on Jul. 25.41.

Other bright (V=13.5-14) outbursts were detected by ASAS on 2004 Oct. 20 
and 2006 Mar. 16.

#     HJD      MAG_0  MAG_1  MAG_2  MAG_3  MAG_4    MER_0 MER_1 MER_2 MER_3 MER_4 GRADE FRAME
   2634.65538 29.999 29.999 29.999 29.999 29.999    0.038 0.039 0.025 0.026 0.024  C 32083
   2636.69095 15.616 16.275 16.974 16.745 16.758    0.039 0.031 0.021 0.022 0.024  A 32392
   2638.67995 29.999 29.999 29.999 29.999 29.999    0.041 0.032 0.024 0.022 0.023  C 32688

   3294.83384 29.999 29.999 29.999 29.999 29.999    0.042 0.036 0.024 0.023 0.024  C 118450
   3298.75021 13.605 13.573 13.590 13.641 13.688    0.039 0.028 0.020 0.022 0.025  A 118840
   3355.60310 29.999 29.999 29.999 29.999 29.999    0.039 0.026 0.022 0.023 0.026  C 124352

   3407.60450 29.999 29.999 29.999 29.999 29.999    0.098 0.060 0.056 0.060 0.065  D 128866
   3409.61650 15.060 15.437 16.233 16.766 20.453    0.069 0.035 0.030 0.031 0.035  A 129180
   3412.57158 29.999 29.999 29.999 29.999 29.999    0.088 0.046 0.041 0.045 0.049  C 129604

   3806.51512 29.999 29.999 29.999 29.999 29.999    0.051 0.033 0.034 0.040 0.048  C 181427
   3810.50632 13.962 14.067 14.243 14.435 14.734    0.051 0.036 0.037 0.045 0.056  A 181937
   3812.53443 29.999 29.999 29.999 29.999 29.999    0.076 0.041 0.037 0.042 0.048  C 182267
   3815.51436 29.999 29.999 29.999 29.999 29.999    0.065 0.034 0.031 0.036 0.042  C 182737
   3818.50491 29.999 29.999 29.999 29.999 29.999    0.057 0.032 0.029 0.033 0.038  C 183210

   4672.91223 29.999 29.999 29.999 29.999 29.999    0.041 0.034 0.031 0.035 0.040  C 279173
   4682.92091 13.685 13.576 13.558 13.481 13.376    0.042 0.030 0.027 0.030 0.035  A 280441


On Fri, Aug 08, 2008 at 07:01:44PM +0900, Hitoshi YAMAOKA wrote:
> Dear all,
> 
>   I have just sent a report attached below to the CBAT.  Confirmation
> and spectroscopy would be useful.
> 
> Hitoshi Yamaoka, Kyushu Univ., Japan
> yamaoka at phys.kyushu-u.ac.jp
> 
> --
>   Koichi Itagaki (Yamagata, Japan) reports his discovery of a variable
> object on a survey CCD image taken with a 0.21-m f/3 reflector around
> Aug. 7.7 UT.  Confirmation images taken on Aug. 7.763 UT with a 0.60-m
> f/5.7 reflector + CCD show the variable's magnitude to be about 14.1,
> and the position is R.A. = 4h06m59.78s, Decl.= +0d52'44".3 (equinox 
> 2000.0).  It was fainter than mag 17.0 on his survey image taken on
> 2007 Oct. 13.  Hiroshi Kaneda (Sapporo, Japan) points out that a X-ray
> source 1RXS J040700.2+005247 is located within 7" from the reported
> position, and the variable should be identical with a USNO-B1.0
> cataloged star (B1mag = 18.41, R1mag = 17.47) whose position end
> figures are 59s.82, 44".3.  Hitoshi Yamaoka (Kyushu Univ.) added that
> the NOMAD catalog shows that the object was caught in bright state in
> YB6 catalog (USNO, unpublished, epoch unknown) at B = 14.320 and V =
> 14.350.  These information suggest that the object is a dwarf nova
> caught in outburst.