Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

PSN J16590286+2754556

PSN J16590286+2754556   2013 10 16.8267*  16 59 02.86 +27 54 55.6  17.3 U    4W   1S  P1821408  A 0

2013 10 15.8210

After reporting the optical transient PSN J16590286+2754556 a pre-discovery image of was found taken the night before on 2013 10 15.8210 U.T. with measured end figures of 02.90s and 55.7". The brightness is too difficult to measure but estimated to be 0.3 mag. fainter than at discovery. 35cm f/6 SXVR H9 - Ron Arbour Pennell observatory South Wonston U.K

2013 10 17.728

This transient was observed on 2013 10 17.728 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. 17.4 (R mags for the reference stars from UCAC-4). We also performed astrometry (with a seeing of 1.5" and a scale of 0.63"/pixel to better see the suspect, just a few arcseconds away from the galaxy's nucleus), getting the following end figures: 02.80s 55.0" (J2000.0, mean residuals of 0.15" on both axes).

2013 10 17.728

This transient was observed on 2013 10 17.728 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. 17.4 (R mags for the reference stars from UCAC-4). We also performed astrometry (with a seeing of 1.5" and a scale of 0.63"/pixel to better see the suspect, just a few arcseconds away from the galaxy's nucleus), getting the following end figures: 02.80s 55.0" (J2000.0, mean residuals of 0.15" on both axes).

2013 10 17.7758

This possible supernova was observed again for a third night at 2013 10 17.7758 U.T. showing a slight increase in brightness to mag. 17.1 unfiltered and astrometry with end figures of 02.82s and 55.3". Ron Arbour Pennell Observatory South Wonston U.K.

2013 10 09.8201

D. Grennan, Raheny Observatory, Dublin, Ireland, reports that this possible supernova was detected on a stack of 10 x 60sec exposures taken at 2013 10 19.82006. The new object appears at position with end figures RA=02.82" and DEC=55.3". Estimated magnitude is +17.0. Image was acquired with a 0.35-m astrograph and CCD with sampling at 0.69"/pixel. The image is available at http://www.webtreatz.com/images/ra2013_001.jpg

2013 10 19.8201

Clarification: The above observation was made on 2013 10 19.8201. Not 2013 10 09.8201 as given in the header.