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Copyright by Central Bureau for Astronomical Telegrams. 2011CBET.2733A...1D Electronic Telegram No. 2733 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION SUPERNOVAE 2011cl-2011da [Editor's note: This text replaces that on CBET 2724. There are several changes to the second table (only).] A. J. Drake, S. G. Djorgovski, A. Mahabal, M. J. Graham, and R. Williams, California Institute of Technology; J. L. Prieto, Carnegie Observatories; M. Catelan, Pontificia Universidad Catolica de Chile; E. C. Beshore and S. M. Larson, Lunar and Planetary Laboratory, University of Arizona; and E. Christensen, Gemini Observatory, report the Catalina Real-time Transient Survey's discovery of sixteen supernovae in unfiltered Catalina Sky Survey, Mount Lemmon Survey, and Siding Spring Survey images; S. Howerton (Arkansas City, KS, U.S.A.) was also involved in the discovery of 2011co and 2011cq as part of their bright-host-galaxy supernova search. SN 2011 UT R.A. (2000.0) Decl. Mag. Offset 2011cl Feb. 4.21 8 26 49.16 +20 22 31.8 17.2 3" E, 37" N 2011cm Apr. 14.47 17 14 19.18 +43 59 55.2 18.1 1" E, 1" N 2011cn Apr. 24.30 13 55 31.54 - 2 30 00.5 19.0 1" E, 1" N 2011co Apr. 25.42 9 16 21.65 -23 37 17.4 18.5 26" E, 41" N 2011cp Apr. 26.17 7 52 32.61 +21 53 29.7 19.5 -- 2011cq Apr. 26.18 12 16 07.15 - 3 34 30.7 18.9 21" W, 18" S 2011cr Apr. 26.47 22 04 51.77 +12 46 13.0 17.9 16" E, 16" S 2011cs Apr. 27.18 12 08 01.08 +49 13 33.0 18.6 -- 2011ct Apr. 27.33 15 06 34.40 -10 19 36.5 19.1 2" E 2011cu Apr. 30.20 11 35 10.63 + 1 00 20.9 21.0 -- 2011cv Apr. 30.30 14 33 37.37 -12 02 20.9 19.2 4" E, 14" S 2011cw May 1.38 14 47 39.55 +51 41 04.7 18.3 1" S 2011cx May 2.28 12 14 22.16 +33 55 09.5 18.6 1" W 2011cy May 7.35 14 58 37.10 + 2 20 59.1 20.0 -- 2011cz May 4.23 12 11 24.09 +37 25 52.5 19.2 2" E, 2" S 2011da May 4.24 12 22 27.91 +37 49 39.5 19.2 2" E, 1" S Spectroscopic follow-up data were taken with the Palomar 5-m reflector (+ DBSP) on May 7 and 8 UT. Spectrograms (range 380-920 nm) were cross-correlated with a library of spectra using the SNIDs program (Blondin and Tonry 2007, Ap.J. 666, 1024). Tabulated below are the best matches found to spectra of earlier supernovae and the measured redshifts of the new objects. SN Type SN Match z 2011cl IIP 1992H 0.03 2011cm Ia 2002bo 0.03 2011cn Ia 1998bu 0.09 2011co IIP 2006bp 0.01 2011cp IIn -- 0.38 2011cq II-pec 1987A 0.02 2011cr Ia 2002bo 0.05 2011cs Ic 1995F 0.10 2011ct Ia 1994ae 0.11 2011cu Ia-pec 2000cx 0.08 2011cv Ia 1994ae 0.11 2011cw IIn 1996L 0.04 2011cx Ia 1989B 0.11 2011cy Ia 1999aa 0.16 2011cz IIP 2004et 0.06 2011da IIP 2004et 0.06 Several of these objects were posted on the Central Bureau's TOCP webpage, yielding the following respective preliminary designations: 2011cl, PSN J08264916+2022318; 2011co, TCP J09162165-2337174; 2011cp, PSN J07523261+2153297; 2011cq, PSN J12160715-0334307; 2011cr, PSN J22045177+1246130; 2011cu, PSN J11351063+0100209; 2011cv, PSN J14333737-1202209; 2011cz, PSN J12112409+3725525; 2011da, PSN J12222791+3749395. Additional CSS magnitudes for 2011cq: Apr. 11.24 UT, [20.1; 23.19, 19.0. D. D. Balam, D. Bohlender, D. Monin, and E. Chisholm, Dominion Astrophysical Observatory, National Research Council of Canada, report that images (limiting mag about 21.5) obtained with the 1.82-m Plaskett Telescope on Feb. 8.21 UT show PSN J08264916+2022318 = SN 2011cl at magnitude V = 17.56 (+/- 0.02), with colors B-V = +0.16 (0.04) and V-R = +0.18; SDSS DR6 magnitudes were converted to Kron-Cousins magnitudes using the conversion formulae of Chonis and Gaskell (2007, A.J. 135, 264) from differential photometry using the SDSS star J082645.70+202333.1. On Feb. 9.309, differential magnitudes/colors measured from the star SDSS J082645.37+202348.8 were V = 17.51 (0.02), B-V = +0.28, and V-R = +0.11; the position of SN 2011cl (which appears associated with IC 2373) is measured to be R.A. = 8h26m49s.21, Decl. = +20d22'31".6 (equinox 2000.0). Joseph Brimacombe, Cairns, Australia, reports position end figures 21s.57, 18".0 for SN 2011co = TCP J09162165-2337174 (which appears near NGC 2815) from an image taken on Apr. 26.513 UT remotely using a 40-cm RCOS telescope (+ STL6K camera) at the Macedon Ranges Observatory, Melbourne, Australia. He also provides the following unfiltered CCD magnitudes for 2011co: Apr. 26.513, 18.2; 27.154, 18.0; 28.119, 18.0. Brimacombe has posted images of 2011co at the following website URLs: http://www.flickr.com/photos/43846774@N02/5659923511/ http://www.flickr.com/photos/43846774@N02/5663295862/ http://www.flickr.com/photos/43846774@N02/5668951707/. Brimacombe reports mag 19.7 and position end figures 32s.61, 29".1 for PSN J07523261+2153297 = SN 2011cp from seven stacked 600-s images taken on May 18.155 UT remotely using a 51-cm RCOS telescope (+ STL11K camera) at the New Mexico Skies Observatory near Mayhill, NM, U.S.A. Brimacombe reports mag 18.6 and position end figures 07s.22, 31".6 for PSN J12160715-0334307 = SN 2011cq (which is near PGC 39280) from six stacked 1200-s images taken on Apr. 27.476 UT remotely using a 40-cm RCOS telescope (+ U9000 camera) at the Macedon Ranges Observatory; his image is posted at website URL http://www.flickr.com/photos/43846774@N02/5663148210/. Additional unfiltered CCD magnitudes for PSN J22045177+1246130 = SN 2011cr: May 7.456 UT, 18.2 (Brimacombe; remotely using a 51-cm RCOS telescope + STL11K camera at New Mexico Skies Observatory; position end figures 51s.76, 12".1); May 8.429, 19.2 (R. A. Koff, Bennett, CO, U.S.A.; position end figures 51s.69, 11".9; thirty 60-s images, limiting mag 20.0). Brimacombe measures unfiltered CCD mag 21.2 and position end figures 10s.66, 20".4 for PSN J11351063+0100209 = SN 2011cu from four stacked 1200-s images taken on May 8.218 UT remotely using a 51-cm RCOS telescope (+ STL11K camera) at New Mexico Skies Observatory; his image is posted at website URL http://www.flickr.com/photos/43846774@N02/5702116808/. Brimacombe measures red mag 20.1 and position end figures 37s.4, 20".8 for PSN J14333737-1202209 = SN 2011cv from six stacked 1200-s images taken on May 10.706 UT with a 30-cm telescope (+ STL6K camera) at his Coral Towers Observatory in Cairns, noting that 2011cv is near PGC 119986; his image is posted at website URL http://www.flickr.com/photos/43846774@N02/5708939361/. Additional CCD magnitudes for PSN J12112409+3725525 = SN 2011cz: May 5.266 UT, 19.5 (Koff; thirty-nine stacked 60-s unfiltered images; limiting mag 20.6; position end figures 24s.04, 53".3); May 11.246, 19.0 (Brimacombe; six stacked 1200-s images taken remotely using a 51-cm RCOS telescope + red filter + STL11K camera at New Mexico Skies Observatory). Additional unfiltered CCD magnitudes for PSN J12222791+3749395 = SN 2011da: May 5.229 UT, 19.8 (Koff; forty stacked 60-s images; limiting mag 21.2; position end figures 27s.93, 40".0); May 11.358, 19.3 (Brimacombe; twelve stacked 600-s images taken remotely using a 51-cm RCOS telscope + STL11K camera at New Mexico Skies Observatory; position end figures 27s.96, 40".4). NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2011 CBAT 2011 May 31 (CBET 2733) Daniel W. E. Green
Retrieve 32 NED objects in this reference.
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