[vsnet-alert 14198] Re: Optical flare of an X-ray source XMMSL1 J014956.7+533504 (fwd)

[Kirill Sokolovsky]

Hi everyone!

I've received R-band photometry of XMMSL1 J014956.7+533504 from
Donn Starkey that overlaps in time with the V-band time series
obtained by Bill Stein. You may find a plot with the two lightcurves 
shifted to a common zero-point here:
http://scan.sai.msu.ru/~kirx/tmp/XMMSL1J014956.7/XMMSL1J0149P5335_Stein_Starkey.png

The comparison confirms variability on 0.03mag level, however I was not able to 
recover any convincing periodicity from the R-band lightcurve.

Additional observations are needed to confirm or disprove the presence of a 
periodic signal.

With best wishes,
Kirill Sokolovsky



From: Korotkiy Stas <planet171 at yandex.ru>
To: vsnet-alert <vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp>

On Wed, 1 Feb 2012, Korotkiy Stas wrote:

>  TOCP Designation: TCP J01495677+5335018
>  Observation Date: 2012 01 31.46
>  Remarks: We obtained a low dispersion spectrum (R about 550) of TCP
>  J01495677+5335018 (=XMMSL1 J014956.7+533504; ATel #3896)  on Jan. 31.46 UT
>  with the Araki telescope with our spectrograph (LOSA/F2) at Koyama
>  Astronomical Observatory, Kyoto Sangyo University, Japan.  The Spectrum
>  shows clearly a strong emisson of H-alpha, and absorptions of H-beta and
>  H-ganmma on a blue continuum light.  The absorption component of the H-beta
>  was filled with its emission. The He I (667.8 nm) emission and a Na D
>  absorption (E.W about 0.11 nm) were also detected.  These features suggest
>  that the current brightening of this object would be a outburst phnomenon in
>  a dwarf nova. A. Arai, M. Nagashima, C. Naka (Kyoto Sangyo Univ.)  ( Our
>  spectrum is shown in our blog:
>  http://www.cc.kyoto-su.ac.jp/~kao/blog/index.php/view/156 )
>
>  +
>
>  Bill Stein (NM, USA) has sent me his photometry XMMSL1 J014956.7 +533504.
>  Perfectly visible pulsation period 0.04 days, and the amplitude 0.03 mag:
>  http://goo.gl/1LR4c .
>