Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

PSN J07310540+5756108

PSN J07310540+5756108   2013 09 06.8145*  07 31 05.40 +57 56 10.8  16.7 U    7W  11S  P21194    9 0

2013 09 08.091

This transient was observed on 2013 09 08.091 by Gianluca Masi, Francesca Nocentini and Patrick Schmeer, remotely using the 17" robotic unit part of the Virtual Telescope Project facility in Ceccano, Italy. Unfiltered images show a source at mag. 18.5 (R mags for the reference stars from UCAC-4). We also performed astrometry, getting the following end figures: 05.34s; 11.1" (J2000.0, mean residuals of 0.15" on both axes).

2013 09 08.086

PSN J07310540+5756108 2013 09 08.086 mag 16.3R R.A. = 07h31m05s.34 Decl. = + 57 56 11.0 This reported transient object was found on 4x120s exposure with C14 AND sT9XE (unfiltered) ccd at Tarbatness Observatory MPC Code 181 at 2013 09 08.086UT Position = RA 07 31 05.34 Dec+ 57 56 11.0 UCAC-3 R mag=16.3 Observation and measurement Denis Buczynski

2013 09 08.477

This possible supernova in PGC 21194 was detected with 3 x 5 min images using a luminance filter Photometry: 18.00 +/- 0.07 L (V as ref) Astrometry: RA 07 31 05.38 Dec +57 56 10.9 These data were collected remotely by Joseph Brimacombe, Cairns, Australia. Link to image and further information: http://www.flickr.com/photos/43846774@N02/9703959135/

2013 09 11.661

Follow up image from the same MASTER-Amur telescope with which this PSN was discovered: http://master.sai.msu.ru/static/OT/J07310540+5756108-Sep11-MASTER-Amur.jpg (sum of four 60-sec exposures). Magnitude (unfiltered with the Red zero point): 2013 Sep. 11.661 UT, 17.6+/-0.3.