[Vsnet-alert 8440] Possible new nova or dwarf nova: ASAS 190512+0514.2

[Grzegorz Pojmanski]

Possible new nova or dwarf nova: ASAS 190512+0514.2

Grzegorz Pojmanski, Warsaw University Astronomical Observatory reports:
ASAS3V instrument of The All Sky Automated Survey (telephoto lens 180/2.8, 
diameter 65mm + CCD + Johnsons V  filter, 3 minute exposures, pixel size 
14.8 arcsec, rms astrometric accuracy - 4  arcsec) 

has detected outburst of an ipreviously unobserved object (nova, dwarf nova?)
at RA = 19h 05m 12s  DEC = +05d 14'.2

which is located close to the following USNO-B1 star:
#          id|           RA|          DEC|    B1|    R1|    B2|    R2|    I2|
 0952-0410569 19:05:12.1860 +05:14:12.250   0.00  18.06   0.00  18.13  16.45 
which is hardly visible on the DSS images.

Observations:
    DATE      UT                       HJD      V
03/06/2005 07:37:57 (Jun 03.318) 2453524.8224 invisible ( V > 14)
09/06/2005 05:45:22 (Jun 09.240) 2453530.7445 11.046 
10/06/2005 05:25:36 (Jun 10.226) 2453531.7308 10.5(5)::
10/06/2005 05:37:10 (Jun 10.234) 2453531.7388 10.8(3)::


The two last measurements were obtained through dense clouds 
(extinction ~ 5 mag), and are respectively 2.5 sigma and 6 sigma detections.

Light curve and images can be found on
http://www.astrouw.edu.pl/cgi-asas/asas_disc/190512+0514.2,3524

Regards, Grzegorz Pojmanski