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Nova Oph 2010 (No. 2)

20 Feb 2010, 20:03 UTC
Nova Oph 2010 (No. 2)
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CBET circular No. 2176, issued on February 19, 2010, announces the discovery by Hideo Nishimura (Japan) of a possible nova (mag 9.4) on two 13-s frames taken on Feb. 18.845 UT using a Minolta 120-mm f/3.5 lens and a Canon EOS 5D Digital camera.On our images taken on February 20.5, 2010 we can confirm the presence of an optical counterpart with unfiltered CCD magnitude about 9.4 (UCAC2 Catalogue reference stars) at coordinates:R.A. = 17 26 32.15, Decl.= -28 49 41.8(equinox 2000.0; UCAC2 catalogue reference stars).According to Nishimura nothing is visible at this position on his survey frames taken during each month in the span 2009 Feb.-Oct. 15 and on 2010 Feb. 2, 4, 5, 7, and 13.84 UT (limiting mag 11).Our confirmation image:This is an animation showing a comparison between our image and the archive DSS plate:Please click here for a bigger version: http://bit.ly/b7JFXtOn Vsnet mailing list Imamura-san (Okayama U. of Sci.) and Fujii-san have reported spectra of this object confirming it as a nova:According to Taichi Kato "Halpha emission was accompanied by a P Cyg absorption (blue-shifted by1000 km/s). Balmer emission lines with P Cyg profiles (700 km/s for Halpha) and Fe II lines were visible."by Ernesto Guido & ...

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