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 SN2013df in NGC 4414 

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Crop at 0.76 arcsec/pixel

"SN2013df (RA 12 26 29.33, Dec. +31 13 38.3), discovered June 7, 2013 in the galaxy NGC 4414 (offset 32E 14N), 14.4 magnitude, type IIb SN discovered by Fabrizio Ciabattari and Emiliano Mazzoni with the 50cm Newton telescope at Mount Agliale (Lucca). " [Report from Italian Supernovae Search Project]

NGC 4414 is an unbarred spiral galaxy about 62 million light-years away in the constellation Coma Berenices. It is a flocculent galaxy, with short segments of spiral structure but without the dramatic well-defined spiral arms of a grand design spiral. In 1974 a supernova, SN 1974G, was observed and is the only supernova in this galaxy to be recorded so far. NGC 4414 is also a very isolated galaxy without signs of past interactions with other galaxies[4] and despite not being a starburst galaxy shows a high density and richness of gas -both atomic and molecular, with the former extending far beyond its optical disk.[Text adapted from Wikipedia]

Optics: GSO RC 10" F8 2000mm - Astrograph Ritchie-Chrétien
Mount: AP Mach1 GTO on Gemini Q-Lock tripod
Camera: QSI-640WSG
Filters: Astrodon LRGB 1.25" I Series Gen II
Guiding Systems: SXV-AO-LF Active Optics - SX Lodestar
Dates/Times: 10 June 2011 - Start UT 21.33
Location: Pragelato - Turin - Italy
Exposure Details: L:R:G:B => 40:18:18:18 = > (8x5):(6x3):(6x3):(6x3) color Bin2 [num x minutes]
Cooling Details: -25°C
Acquisition: Maxim DL/CCD, TheSkyX, Voyager
Processing: CCDStack2+, PS CS5
Mean FWHM: 3.12"
SQM-L: 20.88