Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

PSN J16501647+2334449

PSN J16501647+2334449   2015 04 14.48  *  16 50 16.47 +23 34 44.9  18.3 U   11E   3S  N6233     D 0

2015 04 15.91009

This transient was observed on 2015 04 15.91009 by G. Masi and P. Catalano, remotely using the 17"-f/6.8 robotic unit part of the Virtual Telescope Project facility, at Bellatrix Astronomical Observatory in Ceccano, Italy. 180-seconds exposures, unfiltered, show the source at mag. 17.4 (R mags for the reference stars from UCAC-4). We also performed astrometry, getting the following end figures: 16.48; 44.6 (J2000.0, mean residuals of 0.1" on both axes).

2015 04 17.468

PSN J16501647+2334449 = SNhunt286. Object measured 17.5 +/- 0.1 with V as reference using the robotic telescope T21 (0.43-m f/6.8 astrograph + CCD + f/4.5 focal reducer) of iTelescope.net in Mayhill, NM. Comparison stars are from SDSS whose g and r were used to determine V. Image: https://www.flickr.com/photos/watchingthesky/17156119016. S. Howerton

2015 04 16.672

This probable supernova in NGC 6233 was detected with 12 x 10 min images using a clear filter Photometry: Mag 17.88 +/- 0.08 C (V for ref; USNOA2 V) Astrometry: RA 16 50 16.52 Dec +23 34 44.7 These data were collected remotely by Joseph Brimacombe, Coral Towers Observatory, Cairns, Australia. Link to image and further information: https://www.flickr.com/photos/43846774@N02/16560515414/

2015 04 17.468

Due to an error, the photometry for 2015-04-17.468 should be 17.8 +/- 0.1. A luminance filter was used with V as reference.

2015 04 19.471

PSN J16501647+2334449 = SNhunt286. Object measured 18.1 +/- 0.1 on a stack of two 120-second luminance images with V as reference using the robotic telescope T21 (0.43-m f/6.8 astrograph + CCD + f/4.5 focal reducer) of iTelescope.net in Mayhill, NM. Comparison stars are from SDSS whose g and r were used to determine V. S. Howerton