TCP J17344775-2409042 2015 10 11.4129* 17 34 47.75 -24 09 04.2 11.8 U Oph N 0
2015 10 11.4730
Koichi Nishiyama, Kurume,Japan and Fujio Kabashima, Miyaki,Japan report a discovery of TCP (mag.= 11.8) in Oph on two 40-s unfiltered CCD frames taken around 2015 Oct. 11.4129UT ( limiting magnitude=13.3 ), using a 135-mm f/4 camera lens (+FLI 09000 camera). We have confirmed immediately the appearance of our discovery this TCP on four 40-s unfiltered CCD frames taken around 2015 Oct 11.473UT ( limiting magnitude=18.1), using a 0.50-m f/6.8 reflector (+FLI 1001E camera). ( magnitude of referred catalogue Hipparcos, others reference catalogue GSC-ACT) Nothing is visible at this location on one past survey frames taken on 2015 Oct. 07.405 UT(limiting mag.= 13.4) nor on DSS, We have checked in Minor Planets. nearest star in IGSL3, has position end figures 47s352, 02"06, distance 5"9, magnitudes R2=18.55 I=16.44
2015 10 11.41474
This TCP was discovered independently by Shigehisa Fujikawa, Kan'onji, Kagawa, Japan, on a CCD frame taken using a MINOLTA F 3.5 f 120mm lens. He reported his discovery to National Astronomical Observatory of Japan at 12:04 UTC on 2015 Oct 11 just before the above discovery was posted on the TOCP page. His frame was taken on 2015 Oct 11.41474 UT and yielded the position end figures as 47s.36 and 06".6 and the magnitude as 12.1. He confirmed the object on a CCD frame using an f 400mm lens taken on 2015 Oct 11.49011 and the frame yielded the position end figures as 47s.77 and 03".7 and the magnitude as 11.7.
2015 10 11.394
Mag.= 12.0 observed by T. Kojima, Gunma-ken, Japan, pre-discovery observation, using Canon EOS D60 + 135-mm f/2.8 lens.
2015 10 11.72132
This transient was observed on 2015 10 11.72132 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. 30-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: 47.74; 04.0 (J2000.0, mean residuals of 0.2" on both axes).
2015 10 12.0900
Photometry results were B=13.65, V=12.04, Rc=11.12 and Ic=10.09 with 0.50-m f/4.5 CDK astrograph + FLI-PL11002M CCD f iTelescope.NET at Mayhill, NM, USA, remotely. My image is available at http://meineko.sakura.ne.jp/ccd/TCP_J17344775-2409042.jpg Seiichiro Kiyota (Kamagaya, Japan)
2015 10 12.421
Mr. Fujii (Kurashiki, Okayama, Japan) writes that he obtained a spectrogram of this object with the 0.4-m telescope at the Fujii Kurosaki Observatory, and that he found the H-alpha emission line with a P-Cyg profile, from which he estimated the expansion velocity of about 700 km/s. He found a very deep Na I D absorption line whose equivalent width was about 1.1 nm. He also writes that the spectrogram implies heavy interstellar reddening. His spectrogram is posted at http://otobs.org/FBO/etc/tcp_oph.htm.
2015 10 13.40691
V= 12.9 (Tycho catalog), position end figures 47s.74, 03".7, remotely using 0.43-m f/6.8 astrograph + CCD(FLI Proline 16803)at the iTelescopeNET, Siding Spring, Australia. Observer T. Yusa, Osaki, Japan. An image is put on URL http://space.geocities.jp/yusastar77/supernova/NVinOph_151013.htm