IAU Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

CBAT "Transient Object Followup Reports"

PSN J22340480+6826240

PSN J22340480+6826240   2014 07 16.0347*  22 34 04.80 +68 26 24.0  17.2 U    2E   4S  P166758   0 2

2014 07 16.0347

Paolo Campaner report the discovery of an apparent supernova (unfiltered magnitude = 17.2) on images (limiting magnitude 19.0) obtained on July 16.0347 UT with a 0.4m telescope + CCD Atik 428ex at Ponte di Piave - Italy, in the course of the Italian Supernovae Search Project. The new object is located at A.R. = 22h34m04s.80, Decl. = +68°26'24".0 at 2" East and 4" South of the centre of Galaxy PGC166758.

2014 07 17.97464

This transient was observed on 2014 07 17.97464 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. 16.3 (R mags for the reference stars from UCAC-4). We also performed astrometry, getting the following end figures: 04.26; 26.7 (J2000.0, mean residuals of 0.2" on both axes).

2014 07 19.986

Several low resolution spectra of this transient were obtained on 2014 07 19.986 by G. Masi, remotely using the 14" robotic unit part of the Virtual Telescope Project facility in Ceccano, Italy. 15, 300-seconds images were taken using a 100 lines/mm grating, with a dispersion of 34.5 angstroms/pixel. They were co-added and the resulting image shows Si II absorption around 6250 angstroms, suggesting this is a type Ia supernova. Assuming a recessional velocity of 4355 km/s for the host galaxy (UGC 09267, via NED), an expansion velocity of about 9100 km/s is derived from the minimum of the Si II 6350-angstrom line.

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