IAU Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

CBAT "Transient Object Followup Reports"

TCP J00431492+4119128

TCP J00431492+4119128   2013 09 09.5246*  00 43 14.92 +41 19 12.8  16.9 U  345E 184N  M31       N 0

2013 09 09.5246

Koichi Nishiyama, Kurume,Japan and Fujio Kabashima, Miyaki,Japan report the discovery of a possible nova? .(mag.= 16.9) in M31 on nine 40-s unfiltered CCD frames taken around 2013 Sep. 09.52464 UT, ( limiting magnitude = 19.1 ) using a Meade 200R 0.40-m f/9.8 reflector (+SBIG STL1001E camera). as follows Nothing is visible at this location on our past frames taken on 2013 Aug. 26.745 UT (limiting magnitude = 19.1) and Sep 04.692 UT (limiting magnitude = 19.4). . We have checked in Minor Planets. Nothing is visible at the position of possible nova on the Digitized Sky Survey(POSS2/UKSTU) from 1986 Nov. 27 (limiting red mag 18.7) and 1993 Oct. 21(limiting infrared mag 17.9). the nearest star in M31 catalogue (http://www.lowell.edu/users/massey/lgsurvey.html) has position end figures 14s88, 13."7, distance 1."0, magnitudes V=21.4, B=22.3, R=20.9

2013 09 09.627

D. Denisenko, V. Lipunov, E. Gorbovskoy (SAI MSU) report on behalf of the large MASTER-Net collaboration: this possible nova in M31 was independently detected on MASTER-Amur survey images (180-sec unfiltered exposures with 0.40-m f/2.5 reflector + 4Kx4K CCD, limit 18.2m). Magnitudes: Sep. 09.627, 16.8; Sep. 09.641, 16.3. The object was marginally visible on Sep. 08.643 UT image with the same telescope (mag 18.3:, limit 18.8). Position end figures (average of 3 measurements): 14s.96, 12".2. Discovery and reference images: http://master.sai.msu.ru/static/OT/J00431492+4119128-MASTER.png

2013 09 08.643

MASTER-Amur prediscovery image on 2013 Sep. 08.643 UT (sum of three 180-sec unfiltered exposures) with the position of possible Nova marked: http://master.sai.msu.ru/static/OT/J00431492+4119128-MASTER-Sep08.jpg

2013 09 12.452

TCP J00431492+4119128 Mag.= 17.5, position end figures 14s.96, 12".2 observed by T. Noguchi, Chiba-ken, Japan, from 16 stacked 30-s frames (limit mag.= 18.5) using 0.23-m f/6.3 Schmidt-Cassegrain + unfiltered CCD. See a posted image at http://park8.wakwak.com/~ngc/images/TCPinM31.jpg.

2013 09 12.837

This transient was observed on 2013 09 12.837 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. 17.1 (R mags for the reference stars from UCAC-4). We also performed astrometry, getting the following end figures: 214.95s 12.8" (J2000.0, mean residuals of 0.15" on both axes).

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