[vsnet-outburst 7888] Re: HS1857+7127 outburst

[Gary Poyner]

The outburst is still ongoing...

Jly 18.961    13.9

According the Dr. Boris Gaensicke, the eclipses are partial..

http://deneb.astro.warwick.ac.uk/phsdaj/HQS_Public/HQS_Public.html

I've detected five outbursts this year, and although the data
is quite sparse (it's been awful weather here for observing)
the frequency of outbursts is roughly ~35d, with the range at
3 magnitudes (13.7mv - 16.8C), although with improved coverage
these figures will undoubtedly be refined.

Gary
-------------------------------------------------------------
Gary Poyner
garypoyner at blueyonder.co.uk
http://www.garypoyner.pwp.blueyonder.co.uk/varstars.html
"You can always tell a Brummie....but you can't tell him much"!
--------------------------------------------------------------
----- Original Message ----- 
From: "Taichi Kato" <tkato at kusastro.kyoto-u.ac.jp>
To: <variable_star_forum at yahoogroups.com>; <vsnet-alert at yahoogroups.com>; 
<vsnet-campaign-dn at ooruri.kusastro.kyoto-u.ac.jp>; 
<vsnet-outburst at ooruri.kusastro.kyoto-u.ac.jp>; 
<vsnet-outburst at yahoogroups.com>
Sent: Thursday, July 19, 2007 12:54 AM
Subject: [vsnet-outburst 7887] HS1857+7127 outburst


>   The eclipsing dwarf nova HS1857+7127 is undergoing an outburst.
> Among eclipsing long-period systems, the present outburst behavior
> of HS1857+7127 resembles that of EX Dra during its high-amplitude
> state (e.g. 2001-2002).  Further observations of outbursts and
> eclipses are encouraged.
>
>  YYYYMMDD(UT)   mag  observer
>  20070620.167  16.19C  (Gary Poyner)
>  20070620.168  163C  (Eddy Muyllaert)
>  20070624.151  16.32C  (Gary Poyner)
>  20070624.151  164C  (Eddy Muyllaert)
>  20070625.140  16.33C  (Gary Poyner)
>  20070625.140  164C  (Eddy Muyllaert)
>  20070705.126  16.07C  (Gary Poyner)
>  20070707.960  <153  (Gary Poyner)
>  20070711.169  167C  (Eddy Muyllaert)
>  20070713.090  16.02C  (Gary Poyner)
>  20070713.090  162C  (Eddy Muyllaert)
>  20070717.975   137  (Gary Poyner)
>