[vsnet-alert 8230] Rapid brightening, eclipse and humps of Nova Sco 2004 = ASAS 171251-3056.6 (fwd)

From: Joe Patterson <*jop_at_astro.columbia.edu*> Date: Wed, 7 Jul 2004 09:23:33 -0400 (EDT) · jop_at_astro.columbia.edu

Dear CBAers,

Well, it is not yet clear what kind of a star (presumably a nova of some
variety) this thing is, but Pojmanski's light curve shows a pow'f'l
interesting drop!  Well-placed, bright (magnitude 10-11), and even briefly
accessible for the lower northern observatories.  Let's scope this star
out a bit!

joe

BTW the V803 Cen coverage has been good - let's extend it just a few more
days!

---------- Forwarded message ----------
Date: Wed, 7 Jul 2004 09:37:37 +0200
From: Grzegorz Pojmanski <gp@astrouw.edu.pl>
To: vsnet-alert@kusastro.kyoto-u.ac.jp
Subject: [vsnet-alert 8230] Rapid brightening,
     eclipse and humps of Nova Sco 2004 = ASAS 171251-3056.6

Rapid brightening, eclipse and humps of Nova Sco 2004 = ASAS 171251-3056.6

After halt at V=10.64 (for ~ 0.15 d) Nova Sco 2004 =  ASAS 171251-3056.6
entered rapid brightening phase on UT 07.144 (HJD 2453193.651)
gaining 0.07 in less than 2 hours (0.9 mag/day) during which apparent eclipse
was caught on UT 07.225 (delta mag 0.3, delta t < 15 minutes)
Fluctuations with amplitude > 0.04 and period of ~ 0.058 d are now clearly visible.
Its current brightness (UT 07.27) is  V=10.56

See:

Light curve and images can be found on
http://www.astrouw.edu.pl/cgi-asas/asas_disc/171251-3056.6,3193.6

Nearest neighbour:
http://www.astrouw.edu.pl/cgi-asas/asas_disc/171258-3055.8,3193.6

Grzegorz Pojmanski, ASAS