Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

PSN J23470615+2929074

PSN J23470615+2929074   2015 08 06.6796*  23 47 06.15 +29 29 07.4  17.3 U   17E   7N  N7753     I 0

2015 08 06.680

Discovered by K. Itagaki, Yamagata, Japan, using 0.60-m f/5.7 reflector, who confirmed PSN on eight followed-up frames after the discovery. He writes nothing is visible at this location on the past frames, however who found a pre-discovery image on the recent frame taken on 2015 August 4.689 UT. PSN was reported as mag.= 17.7, position end figures 06s.13, 06".9. Discovery image was put at http://k-itagaki.jp/images/7753.jpg.

2015 08 06.9950

Mag.: 17.5(V) R.A.: 23 47 06.08; Decl.: +29 29 06.6 (2000.0). Reference: PPMXL Observer: Massimiliano Martignoni - Observatory: Stazione Astronomica Betelgeuse (B75), Magnago, Italy Telescope: Schmidt-Cassegrain 0.25m-f/10.0 - CCD: KAF0261E

2015 08 06.097

F. Ciabattari and E. Mazzoni report their pre-discovery detection of PSN J23470615+2929074 (unfiltered magnitude = 17.5 with respect to USNO-A2 field stars) on an image (limiting magnitude 18.8) obtained on August 06.097 UT with a 0.5m Newtonian telescope + CCD SBIG ST9 camera at Borgo a Mozzano - Italy, in the course of the Italian Supernovae Search Project. Object is located at A.R. = 23h47m06s.12, Decl. = +29°29'07".3 (equinox 2000.0, astrometry with respect to UCAC 2 stars). Image at https://www.flickr.com/photos/snimages/20392304542/

2015 08 08.4275

Photometry results were V=16.91 and Ic=16.52 with 0.61-m f/6.5 CDK astrograph + FLI PL09000 CCD at SRO (Sierra Remote Observatory) - Auberry, California. USA, iTelescope.NET remotely. Seiichiro Kiyota (Kamagaya, Japan)

2015 08 10.463

Mag.= 17.3, position end figures 06s.13, 07".5 observed by T. Noguchi, Chiba-ken, Japan, using 0.23-m f/6.3 Schmidt Cassegrain + unfiltered CCD. An image at http://park8.wakwak.com/~ngc/images/PSNinNGC7753.jpg.

2015 08 13.07802

This transient was observed on 2015 08 13.07802 by G. Masi, remotely using the 17"-f/6.8 robotic unit part of the Virtual Telescope Project facility, at Bellatrix Astronomical Observatory in Ceccano, Italy. 120-seconds exposures, unfiltered, show the source at mag. 17.5 (R mags for the reference stars from UCAC-4). We also performed astrometry, getting the following end figures: 06.14; 07.4 (J2000.0, mean residuals of 0.2" on both axes).