Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

CBAT "Transient Object Followup Reports"

PSN J18185620+2339370

PSN J18185620+2339370   2012 08 08.062 *  18 18 56.20 +23 39 37.0  16.5 U   11E  17N  N6619     3 -


2012 08 08.0625

Reports the discovery by Fabio Martinelli and Riccardo Mancini of an apparent supernova (mag about 16.5) on unfiltered CCD images (limiting mag about 18.0) taken with 0.35-m telescope of the Osservatorio Astronomico Montecatini val di Cecina, Italy, behalf of the Italian Supernovae Search Project (ISSP) on Agu. 08.0625 UT. The new object is located at R.A. = 18h18m56s.2, Decl. = +23d39'37".0 (equinox 2000.0), which is 11" east and 17" nord of the nucleus of NGC 6619. Nothing is visible at this position on Palomar Sky Survey infrared, red, and blue plates.



2012 08 07.615

D. Denisenko, V. Lipunov (SAI MSU), V. Yurkov, E. Sinyakov (Blagoveschensk Educational State University) report on behalf of a larger MASTER collaboration: We confirm PSN J18185620+2339370 on two unfiltered images (60-sec exposures) taken by MASTER-Amur robotic telescope (0.40-m f/2.5 reflector + 16 Mpix CCD) on 2012 Aug. 07 at 14:45:47 UT and 15:28:17 UT (10 hours before the discovery by ISSP). Position end figures (averaged from two exposures) are 56.00s, 32.9", unfiltered magnitude on Aug. 07.615 UT is 16.6+/-0.1. Nothing is visible on MASTER-Kislovodsk images taken on 2012 July 21.78 UT (limiting magnitude 19.2), as well as on earlier MASTER-Tunka images of 2012 June 25.66 UT and MASTER-Amur images of 2012 June 20.63 UT. Comparison of Aug. 07 and June 20 MASTER-Amur images is posted at http://master.sai.msu.ru/static/OT/PSNJ18185620+2339370-MASTER-Amur.jpg



2012 08 08.8653

Mag.: 16.1(Rc) Observer: Massimiliano Martignoni - Observatory: Stazione Astronomica Betelgeuse (B75), Magnago, Italy Telescope: Schmidt-Cassegrain 0.25m-f/10.0 - CCD: KAF0261E



2012 08 09.2377

L. Elenin (Lyubertsy, Russia) and I. Molotov (Moscow, Russia) confirm an apparent supernova PSN J18185620+2339370 in NGC 6619. Object visible on 3x300sec images remotely taken at ISON-NM Observatory (Mayhill, NM, USA) with 0.45-m f/2.8 telescope + CCD (KAF09000) on Aug. 09.2377. Object located at 18h 18m 55s.96 +/- 0".09, +23d 39' 32".4 +/- 0".11 (NOMAD) and have magnitude about 16.4U (mag. limit ~20.5m). Nothing is visible at this position on the POSS and POSSII images. Image of PSN J18185620+2339370 available at http://spaceobs.org/images/TOCP/PSNJ18185620+2339370-20120809.png



2012 08 14.8723

Photometry: 15.70 +/-0.10 U Astrometry: RA 18 18 55.96 Dec. +23 39 32.6 (equinox 2000.0). GiaGa Obs. Pogliano Milanese (MI) Italy (MPC 203). 0.28 m f/6.8 Schmidt-Cassegrain + ST8XME, UCAC-3 Reference stars, exp. 15 min. (average of 10 images, each 90 sec.). Observers S. Foglia, G. Galli


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