[vsnet-alert 15081] Re: OT J020857.6+324040 = Catalina transient

[Denis Denisenko]

On Sat, Nov 3, 2012 at 7:26 AM, Taichi Kato
<tkato at kusastro.kyoto-u.ac.jp> wrote:

> The object (CSS121102:020858+324040) was recorded bright at 14.4
> on Oct. 16.

That's unbelievable how both Catalina and MASTER have missed this
bright outburst two weeks ago! MASTER-Amur had the object at 13.9m on
four (!) unfiltered 60-sec images on Oct. 15 and then ~1.5 mag fainter
on two Oct. 26 images. MASTER-Tunka which is shooting in two filters
simultaneously with 180-sec exposures has observed the field once on
Oct. 22 (object at R=14.9 V=14.6) and five times on Oct. 24 (V=14.9
R=15.2). FWHM and flatness of the object on most images are OK, within
the transient detection criteria, but for some reason it was not found
by the software automatically.

We will try to investigate why our robots have skipped this object.
Also we might have some additional data from MASTER-Kislovodsk, but at
the moment internet connection to this site is down. Automatic
photometry from two other MASTERs follows.

CSS121102:020858+324040
  20121015.605  13.90C  MASTER-Amur
  20121015.606  13.88C  MASTER-Amur
  20121015.636  13.85C  MASTER-Amur
  20121015.637  13.84C  MASTER-Amur
  20121022.764   149R   MASTER-Tunka
  20121022.764 	 146V   MASTER-Tunka
  20121024.726  15.20R  MASTER-Tunka
  20121024.726  14.91V  MASTER-Tunka
  20121024.729  14.91R  MASTER-Tunka
  20121024.729  14.72V  MASTER-Tunka
  20121024.777  15.51R  MASTER-Tunka
  20121024.777  14.93V  MASTER-Tunka
  20121024.780  15.09R  MASTER-Tunka
  20121024.780  14.94V  MASTER-Tunka
  20121026.480   154C   MASTER-Amur

Denis Denisenko