PSN J12184868+1424435 2014 01 26.83 * 12 18 48.68 +14 24 43.5 17.2 U 14W 16S M99 9 9
2014 01 26.83
We discovered this object in M99 on Jan.26.83 2014 UT in the Tsinghua University-NAOC Transient Survey (TNTS), and the magnitude of the object on unfiltered CCD was about 17.2 mag. Discovery and reference images: http://www.thca.tsinghua.edu.cn/~wangxf/TNTS/PSNJ12184868+1424435.png. Follow up observations are encouraged.
2014 01 28.2924
I took follow-up V (180 sec, 3 frames) and Ic (120sec , 3 frames) band images of this PSN with 0.25m Astrograph+SBIG ST-10XME CCD camera at Mayhill, USA (T05, iTelescope.NET), remotely. Photometry results were V=15.44 and Ic=14.95 using TYC 879-740-1 as a comparison. But, they might have large error as PSN is located close to nucleus of M99 and difficult to measure brightness. I checked various CCD images via google image search to identify the PSN. Position end figures were 48.67 and 44.26. UCAC3 catalog was used for references. My image is available at http://meineko.sakura.ne.jp/ccd/PSN_J12184868+1424435.jpg. Seiichiro Kiyota (Kamagaya, Japan)
2014 01 28.4545
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 28.4, 2014 we can confirm the presence of an optical counterpart with unfiltered CCD magnitude 15.7 and at coordinates: R.A. = 12 18 48.73, Decl.= +14 24 44.3 (equinox 2000.0; UCAC-3 catalogue reference stars). Our confirmation image: http://bit.ly/1e4aiII - An animation showing a comparison between our confirmation image and the archive POSS2/UKSTU plate (R Filter - 1992): http://bit.ly/1i6yBoC - Ernesto Guido, Nick Howes & Martino Nicolini
2014 01 24.847
Prediscovery observations by K. Itagaki, Yamagata, Japan, with a 0.50-m reflector + unfiltered CCD at the Takamizawa station, Tochigi prefecture; Jan 24.847, a trace; Jan 26.762 UT, 17.9: (host-galaxy light extracted). The images can be seen at: http://www.k-itagaki.jp/m99.jpg ,
2014 01 28.
This transient was observed on 2014 01 28.968 by Gianluca Masi, Francesca Nocentini and Patrick Schmeer, 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. 15.1 (R mags for the reference stars from UCAC-4). We also performed astrometry, getting the following end figures: 48.73; 44.4 (J2000.0, mean residuals of 0.2" on both axes).
2014 01 28.968
(sorry, the previous submission was incomplete) This transient was observed on 2014 01 28.968 by Gianluca Masi, Francesca Nocentini and Patrick Schmeer, 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. 15.1 (R mags for the reference stars from UCAC-4). We also performed astrometry, getting the following end figures: 48.73; 44.4 (J2000.0, mean residuals of 0.2" on both axes).
2014 01 29.0518
Mag.: 15.9(V) R.A.: 12 18 48.73; Decl.: +14 24 43.2 (2000.0). Reference: PPMXL Observer: Massimiliano Martignoni - Observatory: Stazione Astronomica Betelgeuse (B75), Magnago, Italy Telescope: Schmidt-Cassegrain 0.25m-f/10.0 - CCD: KAF0261E
2014 01 29.03147
This object was observed by Federica Luppi and Luca Buzzi from Schiaparelli Observatory, Varese, Italy. In a stack of images totalling 10 minutes of unfiltered exposure time, the object has position end figures 48s.74, 44".1 and magnitude 16.1. Image posted at URL http://www.astrogeo.va.it/pub/TOCP/PSN_M99.jpg
2014 01 28.9958
This supernova was observed at mag.+15,4 by Marco Mancini and Marco Burali with Takahashi FRC 300 F 7.8 camera CCD FLI 1001 and filter CLS-CCD. Observatory MTM, Pistoia Italy.
2014 01 29.367
This Type 1c supernova in M99 was detected with 21 x 5 min images using a clear filter, 3 x 5 min images using a visual filter, 3 x 5 min images using a red filter, 2 x 5 min images using a blue filter and 2 x 5 min images using an infrared filter Photometry: Mag 15.76 +/- 0.11 C (V for ref), 15.70 +/- 0.01 V, 15.36 +/- 18 R, 15.98 +/- 0.04 B and 15.70 +/- 0.08 I (R for ref) Astrometry: RA 12 18 48.68 Dec +14 24 44.7 (clear filter) These data were collected remotely by Joseph Brimacombe, Cairns, Australia. Link to image and further information: http://www.flickr.com/photos/43846774@N02/12215830803/