[vsnet-alert 13496] V794 Aql low state (ATEL)

[Taichi Kato]

V794 Aql low state (ATEL)

   Observation in the last year suggests that the object has been
unsteady:

  YYYYMMDD(UT)   mag  observer
  20100710.034  160CR  (Maciej Reszelski)
  20100722.026  166CR  (Maciej Reszelski)
  20100801.968  161CR  (Maciej Reszelski)
  20100806.953  15.20CV  (Javier Temprano)
  20100808.985  165CR  (Maciej Reszelski)
  20100817.919  14.69CV  (Javier Temprano)
  20100910.912  15.26CV  (Diego Rodriguez)
  20100922.960  <154CR  (Maciej Reszelski)
  20100928.810  15.48CV  (Javier Temprano)
  20101002.938  <158CR  (Maciej Reszelski)
  20101012.909  14.63CR  (Maciej Reszelski)
  20101013.850  143CR  (Maciej Reszelski)
  20101017.860  14.98CR  (Maciej Reszelski)
  20101018.893  <151CR  (Maciej Reszelski)

===

The Astronomer's Telegram                   http://www.astronomerstelegram.org

==============================================================================
ATEL #3475                                                           ATEL #3475

Title:  New deep minimum of the cataclysmic variable V794 Aquilae
Author: S. Boeva, G. Latev, K. Stoyanov, R. Zamanov (Institute of
                Astronomy and National Astronomical Observatory, Bulgaria)
Queries:        rkz at astro.bas.bg
Posted: 6 Jul 2011; 14:17 UT
Subjects:Optical, Cataclysmic Variable

We report a deep low state of the cataclysmic variable star V794 Aql. On

the night of 2011 July 4, we observed V794 Aql with the 50/70cm 
Schmidt and 60cm telescopes of the National Astronomical Observatory Rozhen,
Bulgaria, 
equipped with FLI PL 16803 and  
FLI PL 9000 CCD cameras, respectively. The obtained average magnitudes
are as follows: 
<br /> 
JD=2455747.52, B = 18.49 &plusmn;  0.12 &#8211; 3x300 sec exp-time; 
<br /> 
JD=2455747.50, V = 18.40 &plusmn; 0.11 &#8211; 5x300 sec;  
<br /> 

JD=2455747.50, R = 17.77 &plusmn; 0.05 &#8211;  4x300 sec; 

<br /> 
JD=2455747.49, I = 17.31 &plusmn; 0.09 &#8211; 3x300 sec. 

The low photometric states of members of the nova-like VY Sculptoris 
class are rare phenomena, caused by the cessation of mass transfer. 
After the first possible low state of V794 Aql in 1932, there are two 
known deep minima of brightness - in 1985</span> <span lang="en-US">(</span>Honeycutt<span

lang="en-GB"> 
</span>&<span lang="en-GB"> </span>Schlegel<span lang="en-GB">, 
1985, PASP, 97, 1189</span>)<span lang="en-US"> and in 1995 
(</span>Honeycutt & Robertson, 1998<span lang="en-US">, AJ, 116, 
1961), when the star has faded to V=17-18 mag. Our 
observations indicate that V794 Aql is in a deep minimum (fainter than
V=18 mag) 
now. </span></font> 

Follow-up observations are essential for further study of this low state.

------------------------------------------------------------------------------
Password Certification: R. K. Zamanov (rkz at astro.bas.bg)
http://www.astronomerstelegram.org/?read=3475
==============================================================================