[Aavso-photometry] New ASAS variable in Hya: ASAS 102522-1542.4 CONFIRMED

[Tonny Vanmunster]

Dear colleagues,
 
I just made a number of unfiltered CCD images of the area around the newly
discovered variable in Hya, ASAS 102522-1542.4, and confirm the existence of
a 'new' object at the indicated position. A rough estimate yields an
unfiltered mag of 12.5.
 
Telescope : 0.35-m f/6.3 SCT
CCD : SBIG ST-7XME (no filter)
Date and time : 2006, Jan 27, 23h40m UT
 
Best regards,
Tonny
 
Tonny Vanmunster
CBA Belgium Observatory
http://www.cbabelgium.com <http://www.cbabelgium.com/> 

PERANSO : The Light Curve and Period Analysis Software
http://www.peranso.com <http://www.peranso.com/>  

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From: cvnet-discussion at yahoogroups.com
[mailto:cvnet-discussion at yahoogroups.com] On Behalf Of Erwin van Ballegoij
Sent: Friday, January 27, 2006 10:57 AM
To: cvnet-discussion at yahoogroups.com
Subject: [cvnet-discussion] [Fwd: [vsnet-alert 8821] Possible dwarf nova
(nova?) in Hya: ASAS 102522-1542.4]


ASAS did it again! FYI, read the message below:

--------------------------------------------------------------------------
Possible dwarf nova (nova?) in Hya: ASAS 102522-1542.4

Grzegorz Pojmanski, Warsaw University Astronomical Observatory reports:

ASAS3V instrument of The All Sky Automated Survey (telephoto lens 200/2.8,
diameter 70mm + CCD + Johnsons V filter, 3 minute exposures, pixel size
14.8 arcsec, rms astrometric accuracy - 4 arcsec)

has detected outburst of an previously unobserved by ASAS object
(dwarf nova, nova?) at RA = 10h 25m 22s DEC = -15d 42'.4

One USNO_B1 star is located close to this position:
# id| RA| DEC| B1| R1| B2| R2| I2|
0742-0227702 10:25:22.2433 -15:42:22.030 19.32 18.95 19.12 19.10 18.75

A faint object is also visible at this position in DSS image, but nothing
in 2MASS and ROSAT images.


Observations:
DATE UT HJD V
23/01/2006 06:14:34 (Jan 23.260) 2453758.7642 < 14
26/01/2006 05:52:10 (Jan 26.245) 2453761.7488 12.219
27/01/2006 08:17:09 (Jan 27.346) 2453762.8496 12.476
27/01/2006 08:22:06 (Jan 27.349) 2453762.8530 12.492
27/01/2006 08:26:48 (Jan 27.352) 2453762.8563 12.469

Object was below detection limit on the ASAS3I I-filter images
taken on 25/01/2006 05:47:39 UT, but is easily visible on images
taken on 27/01/2006 07:21:54 UT.

Light curve and images can be found on
http://www.astrouw.edu.pl/cgi-asas/asas_disc/102522-1542.4,3755

Regards,
Grzegorz Pojmanski




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