Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

PSN J23011153+1243218

PSN J23011153+1243218   2013 07 17.06  *  23 01 11.53 +12 43 21.8  18.3 U    6E       U12307    9 3

2013 07 21.0088

This transient was observed by Gianluca Masi and Francesca Nocentini, remotely using the 17" robotic unit part of the Virtual Telescope Project facility in Ceccano, Italy. Unfiltered images show the source at mag. 18.6 (R mags for the reference stars from UCAC-4). We also performed astrometry, getting the following end figures: 11.53s; 22.1" (J2000.0, mean residuals of 0.2" on both axes)

2013 07 22.657

This possible supernova in UGC 12307 was detected with 13 x 15 min images using an infrared filter Photometry: Mag 18.73 +/- 0.21 IR > 700 nm (R as ref) Astrometry: RA 23 01 11.55 Dec +12 43 21.4 These data were collected by Joseph Brimacombe, Cairns, Australia. Link to image and further information: http://www.flickr.com/photos/43846774@N02/9347167933/

2013 08 05.0596

SN to be confirmed in UGC 12307 detected with 3 x 3 min images (exp 9 min). Astrometry: RA 23 01 11.51 Dec +12 43 21.7 (ref stars UCAC2) Photometry: 17.91R +/-0.03 (USNO A2R Ref stars 169R, 186R, 174R). Measure using R filter. Observer and measurer: Xavier Bros, ANYSLLUM OBSERVATORY, Ager, Spain. T-350mm f4.6. Link to image and further information: http://www.anysllum.com/PSN_UGC12307.jpg

2013 08 07.636

Follow-up This possible supernova in UGC 12307 was detected with 7 x 15 min images using an infrared filter Photometry: Mag 19.49 +/- 0.21 IR > 700 nm (R as ref) Astrometry: RA 23 01 11.56 Dec +12 43 21.7 These data were collected by Joseph Brimacombe, Cairns, Australia. Link to image and further information: http://www.flickr.com/photos/43846774@N02/9463556290/

2013 08 11.08846

This object was observed by Federica Luppi and Luca Buzzifrom Schiaparelli Observatory, Varese, Italy. In a stack of images totalling 15 minutes of unfiltered exposure time, the object has position end figures 11s.54, 21".9 and magnitude 18.7. Image posted at URL http://www.astrogeo.va.it/pub/TOCP/PSN_U12307.jpg

2013 08 11.572

Follow-up This possible supernova in UGC 12307 was detected with 5 x 15 min images using an infrared filter Photometry: Mag 20.00 +/- 0.24 IR > 700 nm (R as ref) Astrometry: RA 23 01 11.60 Dec +12 43 22.0 These data were collected by Joseph Brimacombe, Cairns, Australia. Link to image and further information: http://www.flickr.com/photos/43846774@N02/9490654035/