IAU Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

CBAT "Transient Object Followup Reports"

TCP J08461690+3115554

TCP J08461690+3115554   2012 03 19.78  *  08 46 16.90 +31 15 55.4  17.4 U   16W  32N            9 0

2012 03 19.78

T. Kryachko, A.Sklyanov, S. Korotkiy and B.Satovskiy (Astrotel obs., KSU) report the discovery of an apparent supernova (mag approximately 17.4) on five unfiltered images with an exposure of 300 sec. (lim mag 21.0) obtained on Mar. 19.78 UT with the Takahashi FRC-300 (D=300mm, F=2330mm) + CCD Apogee Alta U9000 at Kazan State University Astrotel observatory (Karachay-Cherkessia, Russia, MPCCOD: 114). The new object is located at R.A. = 08h46m16s.90 +/- 0".1, Decl. = +31d15'55".4 +/- 0".1 (equinox 2000.0), which is about 16,5" east and 32,4" south of the center of 2MASX J08461580+3116278 galaxy (R.A. = 08h46m15.80s, Decl = +31d16'27".8). Nothing is visible at this position on the Palomar Sky Survey (POSS-II red) obtained 1998-04-18 (via the Digitized Sky Survey; limiting mag 21.0). In MPChecker no asteroids. The object may be a dwarf nova. Discovery image: http://goo.gl/jKOGp

2012 03 20.850

Confirm new object not on DSS at measured position: 08 46 16.90 +31 15 55.8 (UCAC-3). Mag 17.2R. Unfiltered ST9XE + C11. Nick James. MPC 970.

2012 03 20.904

This object has been imaged at Mandi Observatory with the 0.45m f:4.5 telescope + CCD. The TCP has been identified on 4 coadded 240s unfiltered images at position 08:46:16.94 + 31:15:55.93, m = 17.2 V,(limiting magnitude 19.0 V)Nothing is visible at this position on POSS2 red plate (limiting magnitude 21.0)-Paolo Corelli-Pagnacco-Italy

2012 03 20.81

I managed to do time-resolved photometry for 3 hours on this OT, before the clouds forced me to stop. I remotely used the photometric 14"@f/8.7 unit part of the Virtual Telescope Project, Ceccano, Italy . The OT (found at mag. 17.3) is clearly superhumping, with an amplitude of 0.5 mags, so being a SU UMa dwarf nova in superoutburst,. Also, it is showing sharp, >2-mag deep eclipses, with a duration around 25-30 minutes. A search for the superhump period provided a candidate of 2.27 hours, into the period gap. The LC is available here: http://virtualtelescope.bellatrixobservatory.org/TCP_J08461690_3115554_20mar2012.jpg

2012 03 21.939

E new magnitude estimation performed on 2x 120s unfiltered images obtained at Mandi Observatory with the 0.45m f:4.5 telescope + CCD confirmed the drop in magnitude of about 0.75m (m = 17.95 m), limiting magnitude 19.0m-Paolo Corelli-Pagnacco-Italy

2012 03 22.310

This transient near PGC 1939605 was seen with 3 x 15 min images Astrometry: RA 08 46 16.91 Dec 31 15 55.6 Photometry: 18.1 +/- 0.1 L These data were collected by Joseph Brimacombe, Cairns, Australia. Link to image and further information http://www.flickr.com/photos/43846774@N02/6862082488/

Valid HTML 4.01!