SIMBAD references

S. Nakano, Sumoto, Japan, reports the discovery by Koichi Itagaki (Teppo-cho, Yamagata, Japan) of an apparent supernova (mag 18.3) on a 15-s unfiltered CCD frame (limiting magnitude 19.5) taken on Feb. 21.856 UT using a 0.60-m f/5.7 reflector (+ BITRAN camera). The new object is located 14" east and 23" north of the center of IC 1277. Nothing is visible at this position on the Digitized Sky Survey (limiting mag about 20; no bandpass or plate type provided) on on Itagaki's image from 2006 Aug. 15.52 (limiting mag 20.5). The variable was designated PSN J18102840+3100342 when posted at the Central Bureau's TOCP webpage and is here designated 2011ap based on the spectroscopic report below. Reported astrometry and unfiltered CCD magnitudes for 2011ap:

---------------------------------------------------------------------------— 2011 UT R.A. (2000.0) Decl. Mag. Observer ---------------------------------------------------------------------------— Feb. 16.234 18 10 28.41 +31 00 34.3 18.5 Boles 18.547 18.5 Boles 21.856 18 10 28.40 +31 00 34.2 18.3 Itagaki 22.446 18 10 28.37 +31 00 34.1 17.6 Brimacombe 22.45 18 10 28.35 +31 00 33.5 18.3 Koff 22.469 18 10 28.36 +31 00 33.9 18.0 Yusa 22.730 18 10 28.35 +31 00 34.1 17.9 Kadota 22.841 18.1 Itagaki 23.508 16.8 Brimacombe 25.551 16.4 " Mar. 1.504 15.9 " 6.505 16.0 " ---------------------------------------------------------------------------—

T. Boles (Coddenham, England). 0.35-m reflector. Independent discovery (reported after Itagaki's discovery). Offset approximately 14".5 east and 22".8 north of the center of IC 1277.

J. Brimacombe (Cairns, Australia). Remotely using a 51-cm RCOS telescope at New Mexico Skies Observatory near Mayhill, NM, U.S.A. Magnitude and position for Feb. 22 image measured by Boles (otherwise measured by Brimacombe). Brightness on Feb. 23 was 0.2 mag brighter than on Feb. 22. Images posted at http://www.flickr.com/photos/43846774@N02/5472457359/, http://www.flickr.com/photos/43846774@N02/5477943145/, and http://www.flickr.com/photos/43846774@N02/5504029518/.

Ken-ichi Kadota (Ageo, Japan). 0.25-m f/5 reflector + SBIG ST-9E camera (limiting mag 18.9); offset 13".5 east, 22".1 north. Communicated by Nakano. His image is posted at the following website URL: http://members.jcom.home.ne.jp/kenic-k/image/PSNinIC1277-20110222.jpg.

T. Yusa (Osaki, Japan). remotely with a 0.25-m f/3.4 hyperbolic astrograph + SBIG ST-10XME CCD camera at the RAS Observatory near Mayhill, NM, U.S.A. Three 120-s exposures (limiting mag 19.5). Offset 13".1 east, 22".6 south. Image posted at http://space.geocities.jp/yusastar77/PSNJ181028403100342.htm.

R. A. Koff (Bennett, CO, U.S.A.). Twenty-five co-added 60-s images.