IAU Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

CBAT "Transient Object Followup Reports"

PSN J09554214+6940260

PSN J09554214+6940260   2014 01 21.81  *  09 55 42.14 +69 40 26.0  11.7 V   54W  21S  M82       0 0



2014 01 22.1504

I took confirmation images (exp. times were 30 sec, each) of this PSN with 0.43m Astrograph+FLI FLI-PL6303E CCD camera at Mayhill, USA (T21, iTelescope.NET), remotely. Photometry results were B=12.96, V=11.68, Rc=11.04 and Ic=10.63 using TYC 4383-2050-1 as a comparison. I checked various CCD images via google image search. My image is available at http://meineko.sakura.ne.jp/ccd/PSN_J09554214+6940260.jpg. Seiichiro Kiyota (Kamagaya, Japan)




2014 01 22.3690

We performed some follow-up of this object through a 0.50-m f/6.8 astrograph + CCD + f/4.5 focal reducer from MPC Code H06 (iTelescope, New Mexico). On our images taken on January 22.3, 2014 we can confirm the presence of an optical counterpart with unfiltered CCD magnitude 11.3 and R-filtered magnitude 11.0 at coordinates: R.A. = 09 55 42.17, Decl.= +69 40 25.9 (equinox 2000.0; UCAC-3 catalogue reference stars). Our confirmation image: http://bit.ly/1aIuXPr - An animation showing a comparison between our confirmation image and the archive POSS2/UKSTU plate (R Filter - 1998): http://bit.ly/KDLScg - Ernesto Guido, Nick Howes & Martino Nicolini




2014 01 22.399

V. Lipunov, E.Gorbovskoy, M. Pruzhinskaya, D. Denisenko, V. Yurkov, N. Tyurina report on behalf of the MASTER team: MASTER-Amur robotic telescope (http://176.123.192.71/) took several unfiltered images of the M82 on Jan. 22.40 UT. PSN photometry results are: 9.7 (calibrated vs 0.2B + 0.8R). Our image is available at http://master.sai.msu.ru/static/M82_SN.png




2014 01 22.3955

L. Elenin (Lyubertsy, Russia) and I. Molotov (Moscow, Russia) confirm an apparent supernova PSN J09554214+6940260 in M82. Object visible on 4 (BVRI) images remotely taken at ISON-NM Observatory (Mayhill, NM, USA) with 0.4-m f/3 telescope + CCD (KAF09000) on Jan. 22.3955, 2014. Object located at 09h 55m 42s.15 +/- 0".13, +69d 40' 25".8 +/- 0".11 (UCAC-4) with magnitudes 12.91B (22.3955); 11.72V (22.4101); 11.31R (22.4061); 11.33I (22.4066). Nothing is visible at this position on the archive POSS and POSSII images. Image of PSN J09554214+6940260 available at http://spaceobs.org/images/TOCP/PSNJ09554214+6940260-20140122.png




2014 01 15.571

Prediscovery observations by K. Itagaki, Yamagata, Japan (0.50-m f/6.8 refl. + unfiltered CCD, host galaxy is extracted using previous images) : Jan. 13.591 UT, <17.0 ; 14.559, <17.0 ; 15.571, 14.4 ; 16.641, 13.9 ; 17.612, 13.3 ; 19.618, 12.2 ; 20.620, 11.9.




2014 01 15.571

Images = http://www.k-itagaki.jp/psn-m82.jpg




2014 01 22.43508

Photometry: B= 12.9, V= 11.3, R= 10.9, Ic= 10.3; position end figures 42s.14, 25".7 on an image composed from 4-frames which were taken by B(180-s), V(90-s), R(60-s) Ic(60-s) remotely using a 0.43-m f/6.8 astrograph + CCD + f/4.5 focal reducer at the iTelescopeNET Mayhill, New Mexico. Observer T. Yusa, Osaki, Japan. Link to Imeges URL http://space.geocities.jp/yusastar77/supernova/PSNinM82_140122.htm




2014 01 22.490

Mag.= 11.4, position end figures 42s.18, 25".8 (refer to UCAC4 catalog) observed by T. Noguchi, Chiba-ken, Japan, on a 30-s frame (limit mag.= 17.5) with 0.23-m f/6.3 Schmidt-Cassegrain + unfiltered CCD, who informs an image posted at http://park8.wakwak.com/~ngc/images/PSNinM82.jpg.




2014 01 13.59

D. Denisenko, V. Lipunov and E. Gorbovskoy also report: we have checked the latest MASTER images of M82 before the supernova explosion. The object was not present on MASTER-Kislovodsk triplets of unfiltered 60-sec exposures on 2014 Jan. 03.77-03.81 UT (combined limiting magnitude 19.6) and on MASTER-Amur triplets on 2014 Jan. 13.56-13.59 UT (combined m_lim=18.5). Stacked MASTER images of Jan. 03 and Jan. 13 are uploaded to http://master.sai.msu.ru/static/OT/M82-2014Jan03-13-MASTER.jpg




2014 01 22.727

This transient was observed on 2014 01 22.727 by Gianluca Masi, Francesca Nocentini and Patrick Schmeer, remotely using the 17"-f/6.8 robotic unit part of the Virtual Telescope Project facility in Ceccano, Italy. 120-seconds exposures, unfiltered, show the source at mag. 11.2 (R mags for the reference stars from UCAC-4). We also performed astrometry, getting the following end figures: 42.14; 25.9 (J2000.0, mean residuals of 0.2" on both axes).




2014 01 22.466

This possible supernova in M82 was detected with 2 x 5 min images using a clear filter Photometry: Mag 11.56 +/- 0.35 C (V for ref) Astrometry: RA 09 5 42.13 Dec +69 40 26.0 These data were collected remotely by Joseph Brimacombe, Cairns, Australia. Link to image and further information: http://www.flickr.com/photos/43846774@N02/12086849523/




2014 01 22.865

This transient was observed on 2014 01 22.865 by Gianluca Masi, Patrick Schmeer and Francesca Nocentini, remotely using the 14" robotic unit part of the Virtual Telescope Project facility in Ceccano, Italy. Using a 100 lines/mm grating, providing a dispersion of 34.7 angstrom/pixel, we see a strong Si II absorption around 6150 Angstroms, suggesting this is a type Ia supernova.




2014 01 22.900

In addition to our preliminary spectroscopy, this transient was observed under better sky conditions on 2014 01 22.900 by Gianluca Masi, Patrick Schmeer and Francesca Nocentini, remotely using the 14" robotic unit part of the Virtual Telescope Project facility in Ceccano, Italy. Using a 100 lines/mm grating, providing a dispersion of 33.5 angstrom/pixel, several 300-seconds exposures were averaged, getting a good SNR spectrum. We see a strong Si II absorption, significantly blue-shifted of about 18.000/20.000 km/s, suggesting this is a type Ia supernova.




2014 01 16.381

KAIT detected the supernova on Jan 16.381 in a clear band image with preliminary measurement of mag about 13.3. A previous image taken on Jan 14.365 shows no emission at the supernova position with limiting mag about 18.0. A finding chart is posted at : http://astro.berkeley.edu/~zwk/findingchart/PSN_J09554214+6940260.jpg




2014 01 22.435

This possible supernova in M82 was detected with 4 x 10 min images using an infrared filter Photometry: Mag 10.93 +/- 0.63 IR > 700 nm (R for ref) Astrometry: RA 09 5 42.18 Dec +69 40 25.8 These data were collected remotely by Joseph Brimacombe, Cairns, Australia. Link to image and further information: http://www.flickr.com/photos/43846774@N02/12094731156/



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