IAU Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

CBAT "Transient Object Followup Reports"

PSN J12243098+7532086

PSN J12243098+7532086   2014 06 18.8800*  12 24 30.98 +75 32 08.6  16.0 U   10E  24N  N4386     9 0



2014 06 18.8800

Giancarlo Cortini (Monte Maggiore Observatory-Predappio-ITALY) reports the discovery of a possible supernova in NGC 4386 by 0.35m. Sch.-Cass.F/5.5 + SXVR-H9 CCD camera on several unfiltered images taken on: 2014/06/18.88, 70sec. exposure, mag.about+16.0,limit mag.+19.0; the new object is located at: R.A. 12 24 30.98, DECL. +75 32 08.6(2000.0) wich is :10.5 arcsec.E and 24 arcsec.N from the centre of the parent galaxy. My past images of the same field taken on 2014/05/20.91 showed nothing at that position (limit mag.+19.0) and it doesn't appear on P.O.S.S. II red and blue plates. No known minor planet is marked in that position for the time of the discovery.




2014 06 18.92967

Confirmed new object not on DSS. Position from single 60s R band exposure: 12 24 30.93 +75 32 08.8 (UCAC-4). R mag 16.2. C11 + ST9XE. Nick James.




2014 06 18.93746

V band mag from 10x60s = 16.26V. Image at: http://www.nickdjames.com/supernovae/2014/ngc4386_20140618_2234_ndj.jpg




2014 06 18.954

Object measured 16.6V +/- 0.4 on single 120 seconds V filtered exposure with the 0.32m T18 of iTelescope.net at AstroCamp Observatory. Nerpio, Spain. Comparison stars were from UCAC4. Image: https://www.flickr.com/photos/watchingthesky/14455458875. S. Howerton




2014 06 19.9129

This transient was observed on 2014 06 19.9129 by G. Masi, remotely using the 17"-f/6.8 corrected Dall-Kirkham 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. 16.0 (R mags for the reference stars from UCAC-4). We also performed astrometry, getting the following end figures: 31.00; 08.8 (J2000.0, mean residuals of 0.2" on both axes).




2014 06 19.956

Object measured 16.0V +/- 0.3 on single 120 seconds V filtered exposure with the 0.32m T18 of iTelescope.net at AstroCamp Observatory. Nerpio, Spain. Comparison stars were from UCAC4. S. Howerton




2014 06 19.9465

Several low resolution spectra of this transient were obtained on 2014 06 19.9465 by G. Masi, remotely using the 14" robotic unit part of the Virtual Telescope Project facility in Ceccano, Italy. 12, 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 6100 angstroms, suggesting this is a type Ia supernova. Assuming a recessional velocity of 1677 km/s for the host galaxy (NGC 4386, via NED), an expansion velocity of 12000 km/s is derived from the minimum of the Si II 6350-angstrom line.




2014 06 20.6

image and spectrum for this object are available here, from the Virtual Telescope: http://www.virtualtelescope.eu/?p=8332




2014 06 21.174

Photometry of 15.56V +/- 0.03 with 0.28m f/10 SCT with focal reducer to f/5 and Orion StarShoot Deep Space Monochrome Imager III. Exposure was 30x20 seconds in Johnson V. Arkansas City, Kansas. Comparison stars are from UCAC4. Image: https://www.flickr.com/photos/watchingthesky/14283931490. S. Howerton




2014 06 19.229

This possible supernova in NGC 4386 was detected with 4 x 10 min images using a clear filter Photometry: Mag 16.91 +/- 0.29 C (V for ref; USNOA2) Astrometry: RA 12 24 31.07 Dec +75 32 08.4 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@N02/14447477466/




2014 06 20.209

Follow-up This possible supernova in NGC 4386 was detected with 5 x 10 min images using a clear filter Photometry: Mag 16.44 +/- 0.29 C (V for ref; USNOA2) Astrometry: RA 12 24 31.07 Dec +75 32 08.5 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@N02/14447477466



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