Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

PSN J15053007+0138024

PSN J15053007+0138024   2015 03 16.49  *  15 05 30.07 +01 38 02.4  19.2 U   39E   3S  N5839     D 0

2015 03 19.71

PSN J15053007+0138024 = SNhunt281. Object was significantly brighter on 2 x 180-second luminance exposures with robotic T31 (0.50-m f/6.8 astrograph + CCD + focal reducer) of iTelescope.net in Siding Spring, Australia. SNhunt281 measured 16.18 +/- 0.06 with V as reference. Comparison stars are from UCAC4. Image: https://www.flickr.com/photos/watchingthesky/16681350779. S. Howerton

2015 03 22.788

Object measured 15.02V +/- 0.03 on a single 120-second filtered exposure with robotic T9 (0.32-m f/9.3 Ritchey-Chretien + CCD + Focal Reducer) of iTelescope.net in Siding Spring, Australia. Image: https://www.flickr.com/photos/watchingthesky/16895745682. S. Howerton

2015 03 22.96205

This transient was observed on 2015 03 22.96205 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. 15.0 (R mags for the reference stars from UCAC-4). We also performed astrometry, getting the following end figures: 30.09; 02.3 (J2000.0, mean residuals of 0.1" on both axes).

2015 04 01.385

SNhunt281 is near peak. On an average of two 180-second filtered exposures taken through AAVSOnet 0.5-m Sonoita Reasearch Observatory in Arizona the supernova measured 13.82V +/- 0.03. Additional photometries of 13.92B +/- 0.02 (2015-04-01.379) and 13.83sr +/- 0.02 (2015-04-01.389) were determined. Comparison stars are from UCAC4. S. Howerton

2015 04 03.0200

Mag.: 13.8(V) R.A.: 15 05 30.09; Decl.: +01 38 02.1 (2000.0). Reference: PPMXL Observer: Massimiliano Martignoni - Observatory: Stazione Astronomica Betelgeuse (B75), Magnago, Italy Telescope: Schmidt-Cassegrain 0.25m-f/10.0 - CCD: KAF0261E