Two possible new CV and one PSN detected by MASTER
ATel #4579; A. Frolova (Irkutsk State University), S. Shurpakov, D. Denisenko, V. Lipunov, P. Balanutsa, N. Tiurina, E. Gorbovskoy, V. Kornilov, A. Belinski, N. Shatskiy, V. Chazov, A. Kuznetsov, D. Zimnukhov (Moscow State University, SAI), V. Krushinsky, I. Zalozhnih, A. Popov, A. Bourdanov, A. Punanova (Ural Federal University), K. Ivanov, S. Yazev, N. Budnev, E. Konstantinov, O. Chuvalaev, V. Poleshchuk, O. Gress (Irkutsk State University), A. Parkhomenko, A. Tlatov, D. Dormidontov, V. Senik (Kislovodsk solar station of the Pulkovo observatory RAS), V. Yurkov, Y. Sergienko, D. Varda, E. Sinyakov (Blagoveshchensk Educational University), P. Podvorotny, V. Shumkov, (MASTER team members), H. Levato, C. Saffe (ICATE), C. Mallamaci, C. Lopez and F. Podest (Observatorio Astronomico Felix Aguilar; OAFA)
on 16 Nov 2012; 07:36 UT
Credential Certification: Vladimir Lipunov (firstname.lastname@example.org)
Subjects: Optical, Cataclysmic Variable, Supernovae, Transient
MASTER OT J230207.47+773104.0 - new CV in outburst
MASTER-Tunka auto-detection system discovered OT source at (RA, Dec) =
23h 02m 07.47s +77d 31m 04.0s on 2012-11-13.57846 UT. The OT
unfiltered magnitude is 18.5m (limit 19.5m). The OT is seen in 3
images. There is no minor planet at this place.
We have reference image without OT on 2011-10-04.63646 UT with
unfiltered magnitude limit 19.5m.
The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/230207.47773104.0.png
There is nothing at this position in USNO-B1.0, 2MASS, 1RXS, GCVS
catalogs and in AAVSO VSX. This area is not covered by GALEX, NEAT,
CRTS and SDSS. However, there is a blue star on digitized Palomar
plates which is present in GSC 2.3.2 catalog with coordinates 23 02
07.774 +77 31 04.13 and Jmag=19.42. The star was in outburst on 1992
Nov. 17 plate and at quiescence on all other images. Comparison of
1992 Nov. 17 and 1993 July 26 blue DSS plates is available at http://master.sai.msu.ru/static/OT/J230207+773104-DSS-Blue.jpg
Based on the amplitude of variability and presence of previous
outburst we conclude that MASTER OT J230207.47+773104.0 is the new
cataclysmic variable (dwarf nova). Follow up observations are
MASTER OT J235317.35+142433.8 - PSN in SDSS J235317.41+142434.4
MASTER-Tunka auto-detection system discovered OT source at (RA, Dec) = 23h 53m 17.35s +14d 24m 33.8s on 2012-11-15.56586 UT.
The OT unfiltered magnitude is 17.8m (limit 19.5m).
The OT is seen in 4 images. There is no minor planet at this place.
We have reference image without OT on 2011-12-18.52405 UT with unfiltered magnitude limit 20.1m.
There is a galaxy within 1" of the OT in SDSS DR8 SDSS
J235317.41+142434.4 (g=20.42 r=19.94 i=19.69). It is also present
in GALEX catalog as GALEX J235317.4+142434 (FUV=22.25+/-0.18
NUV=22.27+/-0.17) and in USNO-B1.0 as USNO 1044-0663403 (B2=20.37
No previous outbursts were found in CRTS database
on 148 images during 2004-2012 and in NEAT data on
42 images taken in 1997-2002.
Spectroscopic confirmation is required.
The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/235317.35142433.8.png
MASTER OT J064058.32+213814.1 - new CV
MASTER-Amur auto-detection system discovered OT source at (RA, Dec) = 06h 40m 58.32s +21d 38m 14.1s on 2012-11-15.73451 UT.
The OT unfiltered magnitude is 17.3m (limit 18.3m).
The OT is seen in 2 images. There is no minor planet at this place.
We have reference image without OT on 2012-10-20.80144 UT with unfiltered magnitude limit 18.9m.
MASTER OT J064058.32+213814.1 - new CV
Nothing is present at the position of the OT in 2MASS, USNO-B1.0, 1RXS
and GCVS catalogs, as well as in AAVSO VSX. This area is not covered
by CRTS, SDSS and GALEX. There is a faint star visible at the limit of
blue Palomar plates, but not on R and I images. It is listed in GSC
2.3.2 with coordinates 06 40 58.275 +21 38 13.10 and Jmag=22.10.
No previous outbursts were found on 6 NEAT images obtained on 2002
Oct. 03 and 04.
The galactic latitude is +7.5 deg. Based on amplitude of variability
we conclude that MASTER OT J064058.32+213814.1 is a new cataclysmic
variable (dwarf nova) in outburst. Follow up observations are
encouraged.The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/064058.32213814.1.png
Global MASTER Robotic Net