Browsing by Author "Howerton, S."

Now showing 1 - 20 of 36
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    Supernova 2010hj in Pgc 67413
    (2010) Drake, A. J.; Djorgovski, S. G.; Mahabal, A.; Graham, M. J.; Williams, R.; McNaught, R. H.; Garradd, G.; Howerton, S.; Prieto, J. L.; Catelan , Marcio; Beshore, E. C.; Larson, S. M.; Christensen, E.
    Report the discovery of an apparent supernova in unfiltered Siding Spring Survey (SSS) images: SN 2010 UT R.A. (2000.0) Decl. Mag. Offset 2010hj Aug. 4.61 21 49 09.84 -59 02 23.2 17.1 5".5 W, 8".2 S Nothing was visible at this position on an SSS image from 2009 Oct. 1.50 UT (limitiing mag 18.9), but 2010hj was detected again in SSS images on Aug. 29.59 (no magnitude provided). The host galaxy appears to be PGC 67413 = ESO 145-G16. Joseph Brimacombe, Cairns, Australia, reports that ten stacked 600-s CCD images (limiting magnitude 20) taken remotely with a 32-cm RCOS telescope (+ STL6K camera + clear filter) at the Macedon Ranges Observatory near Melbourne, Australia, on Aug. 29.727 show the new object to be at mag 18.3 and located approximately 7" west and 7" south of the presumed host-galaxy nucleus. Another stacked image (seven 1200-s frames; limiting magnitude 20), taken by Brimacombe on Sept. 2.636 with a 40-cm RCOS telescope (+ U16 camera + red filter) at the Coral Towers Observatory (Cairns), yields mag 18.6 for 2010hj; the Sept. 2 stacked image has been posted at the following website URL: http://www.flickr.com/photos/43846774@N02/4952444311/....
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    Supernova 2010jt
    (2010) Howerton, S.; Drake, A. J.; Djorgovski, S. G.; Mahabal, A.; Graham, M. J.; Williams, R.; McNaught, R. H.; Garradd, G.; Prieto, J. L.; Catelan , Marcio; Beshore, E. C.; Larson, S. M.; Christensen, E.
    Report the discovery of an apparent supernova in Siding Spring Survey (SSS) images made public via the "Catalina Real-time Transient Survey" program: SN 2010 UT R.A. (2000.0) Decl. Mag. Offset 2010jt Nov. 6.57 23 43 41.24 -41 18 46.9 19.0 20".5 E, 29".6 N Further SSS magnitudes for 2010jt: Oct. 18.51 UT, [20.5 (co-added image); Nov. 7.50, 19.0. The likely host galaxy, 6dFGS gJ234339.4-411917, has redshift z = 0.053....
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    Supernova 2010kq in UGC 1769
    (2010) Howerton, S.; Drake, A. J.; Djorgovski, S. G.; Mahabal, A.; Graham, M. J.; Williams, R.; Prieto, J. L.; Catelan , Marcio; Beshore, E. C.; Larson, S. M.; Christensen, E.
    Report the CRTS discovery of an apparent supernova in public images from the Catalina Sky Survey (CSS). SN 2010 UT R.A. (2000.0) Decl. Mag. Offset 2010kq Dec. 7.23 2 18 10.92 +37 05 42.4 18.3 0".3 E, 4".9 S After posting on the CBAT's unconfirmed-objects webpage, Markku Nissinen and Veli-Pekka Hentunen (Varkaus, Finland) report that their exposures (limiting mag R = 18.9; 3-sigma) taken on Dec. 9 remotely with a 51-cm f/6.8 GRAS011 Global-Rent-a-Scope (+ FLI ProLine PL-11002M camera) near Mayhill, NM, USA, yield position end figures 11s.05, 39".9 for 2010kq (which is 1".5 east and 6".1 south of the center of the galaxy UGC 1769); they note that nothing is visible at this position on a red Palomar Sky Survey F plate. Further CCD magnitude estimates for 2010kq (unfiltered unless otherwise noted): Nov. 15.20 UT, [19.5 (CSS); Dec. 9.088, R = 16.4 +/- 0.1 (Nissinen and Hentunen); 9.14, 16.4 (Howerton; remotely using the LB-1 0.6m telescope at Rodeo, NM, U.S.A.). Drake notes that the presumed host galaxy, UGC 1769, has redshift z = 0.027....
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    Supernova 2010ks in UGC 5622
    (2010) Howerton, S.; Drake, A. J.; Djorgovski, S. G.; Mahabal, A.; Graham, M. J.; Williams, R.; Prieto, J. L.; Catelan , Marcio; Beshore, E. C.; Larson, S. M.; Christensen, E.
    Report the CRTS discovery of an apparent supernova in public images from Catalina Sky Survey (CSS). SN 2010 UT R.A. (2000.0) Decl. Mag. Offset 2010ks Dec. 11.46 10 23 42.44 +33 46 49.0 17.0 7".8 E, 22".0 N Further unfiltered CCD magnitude estimates of 2010ks: June 15.20 UT, [19.3 (CSS); Dec. 12.42, 17.4 (LB-1 0.6-m telescope at Rodeo, NM). The presumed host galaxy, UGC 5622, has redshift z = 0.033....
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    Supernova 2011ae in MCG -03-30-19 = Psn J11544925-1651436
    (2011) Howerton, S.; Drake, A. J.; Djorgovski, S. G.; Mahabal, A.; Graham, M. J.; Williams, R.; Prieto, J. L.; Catelan , Marcio; Beshore, E. C.; Larson, S. M.; Christensen, E.; Sahu, D. K.; Arora, S.; Anto, P.
    Report the Catalina Real-time Transient Survey's discovery of an apparent supernova in public images from the Catalina Sky Survey (CSS). SN 2011 UT R.A. (2000.0) Decl. Mag. Offset 2011ae Feb. 12.43 11 54 49.25 -16 51 43.6 15.5 4".9 W, 8".4 N Further unfiltered CCD magnitude estimates for 2011ae: Feb. 5.46 UT, [18.5 (CSS); 13.41, 15.3 (remotely with the LB3 0.35-m telescope at Rodeo, NM, U.S.A.). Drake writes that the presumed host galaxy has redshift z = 0.0060. The object was given the designation PSN J11544925-1651436 when posted by Drake on the Central Bureau's TOCP webpage, and based on the spectroscopy below is here assigned the final designation SN 2011ae. D. K. Sahu, S. Arora, and P. Anto, Indian Institute of Astrophysics, Bangalore, report that a low-resolution spectrogram (range 350-930 nm) of 2011ae, obtained on Feb. 21.75 UT with the Indian Astronomical Observatory's 2-m Himalayan Chandra Telescope (+ HFOSC), shows it to be a normal type-Ia supernova, a few days before maximum light. Using the SNID code of Blondin and Tonry (2007, Ap.J. 666, 1024), the spectrum of 2011ae is found to best match that of SN 1990N at about 5 days before maximum light. Adopting a recession velocity of 1813 km/s for the presumed host galaxy (de Vaucouleurs et al. 1991, Third Reference Catalogue of Bright Galaxies), MCG -03-30-19, the velocity corresponding to the Si II 635.5-nm absorption line is 12500 km/s....
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    Supernova 2011an in UGC 4139 = Psn J07592442+1625082
    (2011) Howerton, S.; Drake, A. J.; Djorgovski, S. G.; Mahabal, A.; Graham, M. J.; Williams, R.; Prieto, J. L.; Catelan , Marcio; Beshore, E. C.; Larson, S. M.; Christensen, E.; Marion, G. H.; Calkins, M.
    Report the Catalina Real-time Transient Survey's discovery of an apparent supernova in public images from the Catalina Sky Survey. SN 2011 UT R.A. (2000.0) Decl. Mag. Offset 2011an Mar. 1.19 7 59 24.42 +16 25 08.2 18.4 11".6 E, 8".5 S This object was designated PSN J07592442+1625082 when posted on the Central Bureau's TOCP webpage and is here designated SN 2011an based on the spectroscopy reported below. Further unfiltered CCD magnitudes for 2011an: Jan. 28.26 UT, [20.5 (Mt. Lemmon Survey); Mar. 2.13, 16.9 (Howerton, 0.2-m telescope); Mar. 3.269, 15.7 (Joseph Brimacombe, Cairns, Australia; remotely using a 51-cm RCOS telescope + STL11K camera at New Mexico Skies Observatory, Mayhill, NM, U.S.A.; position end figures 24s.38, 09".1). Brimacombe has posted his image at URL http://www.flickr.com/photos/43846774@N02/5493974475/. The presumed host galaxy is UGC 4139 = PGC 22391. G. H. Marion, Harvard-Smithsonian Center for Astrophysics (CfA), on behalf of the CfA Supernova Group, report that a spectrum (range 340-740 nm) of PSN J07592442+1625082 = 2011an was obtained on Mar. 5 UT by M. Calkins with the F. L. Whipple Observatory 1.5-m telescope (+ FAST). Cross-correlation with a library of supernova spectra using the "Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) shows that 2011an is a type-IIn supernova, similar to SN 2001fa near maximum light....
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    Supernova 2011be = Psn J09225262+2159157
    (2011) Howerton, S.; Drake, A. J.; Djorgovski, S. G.; Mahabal, A.; Graham, M. J.; Williams, R.; Prieto, J. L.; Catelan , Marcio; Beshore, E. C.; Larson, S. M.; Christensen, E.; Marion, G. H.
    Report the Catalina Real-time Transient Survey's discovery of an apparent supernova in public images from the Catalina Sky Survey (CSS). SN 2011 UT R.A. (2000.0) Decl. Mag. Offset 2011be Mar. 25.14 9 22 52.62 +21 59 15.7 17.7 6".2 W, 43".7 N Further unfiltered CCD magnitude estimates of 2011be: Mar. 11.23 UT, [19.7 (CSS); 26.17, 17.1 (remotely using a 0.5-m LB-1 telescope at Rodeo, NM, U.S.A.). G. H. Marion, Harvard-Smithsonian Center for Astrophysics (CfA), on behalf of the CfA Supernova Group, reports that a spectrum (range 340-740 nm) of PSN J09225262+2159157 = SN 2011be was obtained on Apr. 2 UT by Marion with the F. L. Whipple Observatory 1.5-m telescope (+ FAST). Cross-correlation with a library of supernova spectra using the "Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) shows that the object is a type-Ia supernova near maximum light. Using a redshift of z = 0.0348, measured from host-galaxy emission lines, the velocity of the Si II 635.5-nm feature is estimated to be approximately 10700 km/s....
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    Supernova 2011bg = Psn J11561431+2521119
    (2011) Howerton, S.; Drake, A. J.; Djorgovski, S. G.; Mahabal, A.; Graham, M. J.; Williams, R.; Prieto, J. L.; Catelan, Marcio; Beshore, E. C.; Larson, S. M.; Christensen, E.; Marion, G. H.
    Report the Catalina Real-time Transient Survey's discovery of an apparent supernova in public images from the Catalina Sky Survey (CSS). SN 2011 UT R.A. (2000.0) Decl. Mag. Offset 2011bg Mar. 26.34 11 56 14.31 +25 21 11.9 16.7 1" N This variable was designated PSN J11561431+2521119 when posted at the Central Bureau's TOCP webpage and is here designated SN 2011bg based on the spectroscopic report below. Further unfiltered CCD magnitudes for 2011bg: Mar. 5.33 UT, [18.4 (CSS); 28.31, 16.3 (remotely using a 0.5-m LB-1 telescope at Rodeo, NM, U.S.A.). G. H. Marion, Harvard-Smithsonian Center for Astrophysics (CfA), on behalf of the CfA Supernova Group, reports that a spectrum (range 340-740 nm) of PSN J11561431+2521119 = SN 2011bg was obtained on Apr. 2 UT by Marion with the F. L. Whipple Observatory 1.5-m telescope (+ FAST). Cross-correlation with a library of supernova spectra using the "Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) shows that 2011bg is a type-Ia supernova of the 1991T-like sub-class at a few days before maximum light. Using a redshift of z = 0.0322, measured from host-galaxy emission lines, the velocity of the Si II 635.5-nm feature is estimated to be approximately 10500 km/s....
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    Supernova 2011bn = Psn J16164236+0014299
    (2011) Howerton, S.; Drake, A. J.; Djorgovski, S. G.; Mahabal, A.; Graham, M. J.; Williams, R.; Prieto, J. L.; Catelan, Marcio; Beshore, E. C.; Larson, S. M.; Christensen, E.; Tomasella, L.; Benetti, S.; Bufano, F.
    Report the discovery via the Catalina Real-time Transient Survey (CRTS) of an apparent supernova in public images from the Catalina Sky Survey (CSS). This variable was designated PSN J16164236+0014299 when posted on the Central Bureau's TOCP webpage and is here designated SN 2011bn based on the spectroscopic confirmation reported below. SN 2011 UT R.A. (2000.0) Decl. Mag. Offset 2011bn Mar. 8.46 16 16 42.36 + 0 14 29.9 18.9 17".9 W, 16".9 S Further unfiltered CCD magnitudes for 2011bn: Feb. 11.52 UT, [19.7 (CSS); Mar. 9.50, 17.9 (remotely using a 0.5-m LB-1 telescope near Rodeo, NM, U.S.A., by the CRTS team); 10.430, 18.0 (Joseph Brimacombe, Cairns, Australia; remotely using a 51-cm RCOS telescope + STL11K camera at New Mexico Skies Observatory, Mayhill, NM, U.S.A.; position end figures 42s.54, 28".6). Brimacombe has posted his image at the following website URL: http://www.flickr.com/photos/43846774@N02/5515332321/. L. Tomasella and S. Benetti, Istituto Nazionale di Astrofisica (INAF), Osservatorio Astronomico di Padova; and F. Bufano, INAF, Osservatorio Astronomico di Catania, on behalf of a larger collaboration, report that a spectrum of 2011bn = PSN J16164236+0014299, obtained on Apr. 10.41 UT with the New Technology Telescope (+ EFOSC2; range 340-750 nm, resolution 1.3 nm), shows it to be a type-II supernova. The best fits to this noisy spectrum found by GELATO (Harutyunyan et al. 2008, A.Ap. 488, 383; publicly available at https://gelato.tng.iac.es) are with spectra of type-II supernovae at about one month post explosion, adopting a recession velocity of 9183 km/s for UGC 10306 (Bottinelli et al. 1993, A.Ap. 102, 57; via NED)....
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    Supernova 2011bz in NGC 5442 = Psn J14044453-0943160
    (2011) Howerton, S.; Drake, A. J.; Djorgovski, S. G.; Mahabal, A.; Graham, M. J.; Williams, R.; Prieto, J. L.; Catelan, Marcio; Beshore, E. C.; Larson, S. M.; Christensen, E.; Brimacombe, J.; Marion, G. H.; Calkins, M.
    Report the Catalina Real-time Transient Survey's discovery of an apparent supernova in public images from the Mount Lemmon Survey. SN 2011 UT R.A. (2000.0) Decl. Mag. Offset 2011bz Apr. 24.34 14 04 43.75 - 9 43 04.7 17.4 19" E, 26" S Note that Drake has revised the position from that used to automatically assign the provisional designation (PSN J14044453-0943160) that was given when this presumed supernova was posted on the Central Bureau's TOCP webpage; it is here designated SN 2011bz based on the spectroscopic report below. Additional unfiltered CCD magnitudes for 2011bz: Mar. 13.44 UT, [19.0 (Catalina Sky Survey; via Drake); Apr. 26.240, 17.5 (J. Brimacombe, Cairns, Australia; remotely using a 51-cm RCOS telescope _ STL11K camera at the New Mexico Skies Observatory near Mayhill, NM, U.S.A.; position end figures 43s.60, 02".7); 26.661, 17.4 (Brimacombe; remotely using a 40-cm RCOS telescope + STL6K camera at the Macedon Ranges Observatory, Melbourne, Australia; position end figures 43s.62, 03".0). Brimacombe's first image is posted at website URL http://www.flickr.com/photos/43846774@N02/5657422949/; his second image is at http://www.flickr.com/photos/43846774@N02/5659643256/. G. H. Marion, Harvard-Smithsonian Center for Astrophysics (CfA), on behalf of the CfA Supernova Group, report that a spectrum (range 340-740 nm) of PSN J14044453-0943160 = SN 2011bz was obtained on Apr. 26 UT by M. Calkins with the F. L. Whipple Observatory 1.5-m telescope (+ FAST). Cross- correlation with a library of supernova spectra using the "Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) shows that 2011bz is a type-Ia supernova a few days after maximum light. The velocity of the Si II 635.5-nm feature is estimated to be approximately 10700 km/s, using an estimated redshift of z = 0.0291, measured from host- galaxy emission lines....
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    Supernova 2011D in UGC 2498
    (2011) Narla, A.; Cenko, S. B.; Li, W.; Filippenko, A. V.; Howerton, S.; Drake, A. J.; Djorgovski, S. G.; Mahabal, A.; Graham, M. J.; Williams, R.; Prieto, J. L.; Catelan, Marcio; Beshore, E. C.; Larson, S. M.; Christensen, E.; Marion, G. H.; Challis, P.; Berlind, P.
    Via public images from the Catalina Sky Survey (CSS). 2011 UT R.A. (2000.0) Decl. Mag. Offset Observers Jan. 5.09 3 02 14.58 +17 20 58.9 18.2 33".8 E, 14".7 N CSS Jan. 6.30 3 02 14.53 +17 20 58.3 18.2 34".4 E, 14".8 N KAIT Additional magnitudes for 2011D: 2010 Dec. 8.32 UT, [19.3 (KAIT); 10.19, [19.4 (CSS); 2011 Jan. 7.21, 18.2 (KAIT); 8.13, 17.8 (S. Howerton, remotely with the LB-1 0.6-m telescope near Rodeo, NM, U.S.A.). Drake notes that the presumed host galaxy, UGC 2498, has redshift z = 0.0231. G. H. Marion and P. Challis, Harvard-Smithsonian Center for Astrophysics (CfA), on behalf of the CfA Supernova Group, report that a spectrum (range 340-740 nm) was obtained of 2011D on Jan. 8 UT by P. Berlind with the F. L. Whipple Observatory 1.5-m telescope (+ FAST). Cross-correlation with a library of supernova spectra using the "Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) shows that 2011D is a type-IIb supernova a few days before maximum light....
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    Supernova 2011dr in Pgc 64099 = Psn J20062026-4245581
    (2011) Howerton, S.; Drake, A. J.; Djorgovski, S. G.; Mahabal, A.; Graham, M. J.; Williams, R.; Prieto, J. L.; Catelan, Marcio; McNaught, R. H.; Garradd, G.; Beshore, E. C.; Larson, S. M.; Christensen, E.; Valenti, S.; Benetti, S.
    Report the discovery of an apparent supernova in public images from the Siding Spring Survey (SSS), with the discovery observation tabulated below: SN 2011 UT R.A. (2000.0) Decl. Mag. Offset 2011dr May 25.82 20 06 20.26 -42 45 58.1 17.8 9".7 W, 7".0 S The variable was designated PSN J20062026-4245581 when posted on the Central Bureau's TOCP webpage and is here designated SN 2011dr based on the spectroscopic confirmation below. Additional magnitudes for 2011dr: Apr. 30.73 UT, [19.2 (SSS); May 26.732, 17.0 (Joseph Brimacombe, Coral Towers Observatory, Cairns, Australia; 30-cm telescope + STL6K camera + red filter; position end figures 20s.28, 56".5). Brimacombe's image is posted at website URL http://www.flickr.com/photos/43846774@N02/5763117132/. S. Valenti and S. Benetti, Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Padova, on behalf of a larger collaboration, report that a spectrogram (range 330-750 nm; resolution 1.5 nm) of PSN J20062026-4245581 = SN 2011dr, obtained on June 26.40 UT with the European Southern Observatory's New Technology Telescope (+ EFOSC), is that of a type-IIP supernova. After cross-correlation with a library of supernova spectra via the "GELATO" code (Harutyunyan et al. 2008, A.Ap. 488, 383; available at website URL https://gelato.tng.iac.es/login.cgi), the spectrum of SN 2011dr appears to be very similar to that of SN 1999gi (Leonard et al. 2002, A.J. 124, 2490) at one month after explosion....
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    Supernova 2011ds = Psn J20022093-2013134
    (2011) Howerton, S.; Drake, A. J.; Djorgovski, S. G.; Mahabal, A.; Graham, M. J.; Williams, R.; Prieto, J. L.; Catelan, Marcio; McNaught, R. H.; Garradd, G.; Beshore, E. C.; Larson, S. M.; Christensen, E.; Valenti, S.; Benetti, S.
    Report the discovery of an apparent supernova in public images from the Catalina Sky Survey; it was confirmed in images obtained with the Siding Spring Survey (SSS). SN 2011 UT R.A. (2000.0) Decl. Mag. Offset 2011ds May 13.42 20 02 20.93 -20 13 13.4 16.6 6" W, 17" N The variable was designated PSN J20022093-2013134 when posted at the Central Bureau's TOCP webpage and is here designated SN 2011ds based on the spectroscopic confirmation that is detailed below. Further magnitudes for 2011ds: Apr. 11.74 [19.0 (SSS); May 14.69, 16.6 (SSS); 15.721, 16.6 (Joseph Brimacombe, Coral Towers Observatory, Cairns, Australia, 30-cm telescope + STL6K camera + red filter; position end figures 20s.92, 12".8). Brimacombe's image is posted at URL http://www.flickr.com/photos/43846774@N02/5724709574/. S. Valenti and S. Benetti, Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Padova, on behalf of a larger collaboration, report that a low-signal-to-noise spectrogram (range 330-750 nm; resolution 1.5 nm) of PSN J20022093-2013134 = SN 2011ds, obtained on June 26.43 UT with the European Southern Observatory's New Technology Telescope (+ EFOSC2), is consistent with that of a type-II supernova. The spectrum indeed shows strong hydrogen H-alpha at 669.1 nm, mainly in emission with a full-width-at-half-maximum of about 7400 km/s....
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    Supernova 2011fz in UGC 12271 = Psn J22582030+0217299
    (2011) Howerton, S.; Drake, A. J.; Djorgovski, S. G.; Mahabal, A.; Graham, M. J.; Williams, R.; Prieto, J. L.; Catelan, Marcio; McNaught, R. H.; Garradd, G.; Beshore, E. C.; Larson, S. M.; Christensen, E.; Valenti, S.; Benetti, S.; Tomasella, L.; Ochner, P.; Pastorello, A.
    Report the discovery of an apparent supernova in public images from the Catalina Sky Survey (CSS). SN 2011 UT R.A. (2000.0) Decl. Mag. Offset 2011fz Sep. 18.28 22 58 20.30 + 2 17 29.9 16.6 13".3 W, 23".0 S The new object was designated PSN J22582030+0217299 when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2011fz based on the spectroscopic report below. Additional unfiltered CCD magnitudes for 2011fz: July 2.38 UT, 19.0 (CSS); Sept. 19.381, 17.9 (Joseph Brimacombe, Cairns, Australia; position end figures 20s.26, 29".2; image posted at website URL http://www.flickr.com/photos/43846774@N02/6170077719/); 19.89, 17.1 (Nick James, Chelmsford, Essex, England; Celestron 11 telescope + ST9XE camera; position end figures 20s.26, 29".0; UCAC-3 reference stars). S. Valenti, S. Benetti, L. Tomasella, and P. Ochner, Osservatorio Astronomico di Padova, Istituto Nazionale di Astrofisica; and A. Pastorello, Dipartimento di Astronomia, Universita di Padova, on behalf of a larger collaboration, report that a spectrogram of PSN J22582030+0217299 = SN 2011fz, obtained on Sept. 24.95 UT, suggests that it is a type-Ib/c supernova observed several weeks after maximum. Using the distance module of 34.14 for UGC 12271 (Mould et al. 2000, Ap.J. 529, 786; via the NED website) and an apparent magnitude of 17.7, 2011fz has an absolute magnitude of -16.45, which is consistent with magnitudes of type-Ib/c supernovae at this phase....
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    Supernova 2011gh in NGC 2405 = Psn J07321603+2554300
    (2011) Howerton, S.; Drake, A. J.; Djorgovski, S. G.; Mahabal, A.; Graham, M. J.; Williams, R.; Prieto, J. L.; Catelan, Marcio; McNaught, R. H.; Garradd, G.; Beshore, E. C.; Larson, S. M.; Christensen, E.; Valenti, S.; Benetti, S.; Tomasella, L.; Ochner, P.; Pastorello, A.
    Report the discovery of an apparent supernova in public images from the Catalina Sky Survey. SN 2011 UT R.A. (2000.0) Decl. Mag. Offset 2011gh Sep. 19.48 7 32 14.94 +25 54 14.6 18.3 12".5 E, 8".7 S Drake originally posted position end figures 16s.03, 30".0 on the Central Bureau's TOCP webpage, and the provisional designation PSN J07321603+2554300 was assigned to this varible; the designation SN 2011gh is assigned here, based on the spectroscopic confirmation reported below. Additional CCD magnitudes for 2011gh (unfiltered unless noted otherwise): Apr. 29.17 UT, [19.5 (Mount Lemmon Survey; via Drake); Sept. 20.476, 19.1 (Joseph Brimacombe, Cairns, Australia); 21.475, R = 19.0 (Brimacombe). Brimacombe's Sept. 20 image is posted at URL http://www.flickr.com/photos/43846774@N02/6167919130/; his Sept. 21 image is at http://www.flickr.com/photos/43846774@N02/6174516626/. S. Valenti, S. Benetti, L. Tomasella, and P. Ochner, Osservatorio Astronomico di Padova, Istituto Nazionale di Astrofisica; and A. Pastorello, Dipartimento di Astronomia, Universita di Padova, on behalf of a larger collaboration, report that a spectrogram (range 360-810 nm; resolution 2.2 nm) of PSN J07321603+2554300 = SN 2011gh, obtained on Sept. 26.10 UT, suggests that it is a type-Ib/c supernova. Cross-correlation with a library of supernova spectra via the "GELATO" code (Harutyunyan et al. 2008, A.Ap. 488, 383; available at URL https://gelato.tng.iac.es/login.cgi), suggests a type-Ib/c supernova a few weeks after B-band maximum....
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    Supernova 2011gi in Pgc 1981 = Psn J00324300+2606516
    (2011) Howerton, S.; Drake, A. J.; Djorgovski, S. G.; Mahabal, A.; Graham, M. J.; Williams, R.; Prieto, J. L.; Catelan, Marcio; McNaught, R. H.; Garradd, G.; Beshore, E. C.; Larson, S. M.; Christensen, E.; Koff, R. A.; Marion, G. H.
    Report the discovery of an apparent supernova in public images from the Catalina Sky Survey (CSS). SN 2011 UT R.A. (2000.0) Decl. Mag. Offset 2011gi Sep. 21.27 0 32 43.00 +26 06 51.6 18.2 13".8 W, 13".6 S This variable was designated PSN J00324300+2606516 when it was posted on the Central Bureau's TOCP webpage and is here designated 2011gi based on the spectroscopic confirmation reported below. Additional unfiltered CCD magnitudes for 2011gi: June 10.44 UT, [19.5 (CSS); Sept. 23.151, 18.5 (Joseph Brimacombe, Cairns, Australia; position end figures 43s.00, 51".2; image posted at URL http://www.flickr.com/photos/43846774@N02/6177438626/); 23.246, 17.9 (R. A. Koff, Bennett, CO, USA; Meade 0.25-m f/10 Schmidt-Cassegrain reflector + Apogee AP-47p CCD camera; thirty stacked 60-s images; limiting mag 20.5; image scale 2"/pixel; position end figures 42s.97, 51".2, UCAC3 reference stars). G. H. Marion, Harvard-Smithsonian Center for Astrophysics (CfA), on behalf of the CfA Supernova Group, report that a spectrum (range 340-740 nm) of PSN J00324300+2606516 = 2011gi was obtained on Sept. 27 UT by Marion with the F. L. Whipple Observatory 1.5-m telescope (+ FAST). Cross-correlation with a library of supernova spectra using the "Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) shows that 2011gi is a type-Ia supernova about 40 days after maximum light. The best-fit SNID templates are for 1991T-like type-Ia supernovae between 37 and 45 days post-maximum at z = 0.034....
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    Supernova 2011gl in Pgc 16578 = Psn J05014307-1523247
    (2011) Howerton, S.; McNaught, R. H.; Garradd, G.; Drake, A. J.; Djorgovski, S. G.; Mahabal, A.; Graham, M. J.; Williams, R.; Prieto, J. L.; Catelan, Marcio; Beshore, E. C.; Larson, S. M.; Christensen, E.; Brimacombe, J.; Marion, G. H.
    Report the discovery of an apparent supernova in public unfiltered-CCD images from the Siding Spring Survey (SSS): SN 2011 UT R.A. (2000.0) Decl. Mag. Offset 2011gl Sep. 23.71 5 01 43.07 -15 23 24.7 18.2 42".9 E, 29".7 N The variable was designated PSN J05014307-1523247 when it was posted on the Central Bureau's TOCP webpage and is here designated SN 2011gl based on the spectroscopic confirmation reported below. Additional unfiltered CCD magnitudes for 2011gl: Mar. 26.45 UT, [19.3 (SSS); Sept. 25.483, 17.7 (J. Brimacombe, Cairns, Australia; position end figures 43s.07, 25".3; image posted at website URL http://www.flickr.com/photos/43846774@N02/6183792395/. G. H. Marion, Harvard-Smithsonian Center for Astrophysics (CfA), on behalf of the CfA Supernova Group, reports that a spectrum (range 340-740 nm) of PSN J05014307-1523247 = 2011gl was obtained on Sept. 29 UT by Marion with the F. L. Whipple Observatory 1.5-m telescope (+ FAST). Cross-correlation with a library of supernova spectra using the "Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) shows that 2011gl is a type-Ia supernova about two weeks after maximum light. The best-fit SNID template is to SN 2005am at +16 days and z = 0.043....
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    Supernova 2011gp in UGC 3119 = Psn J04390804+1131516
    (2011) Howerton, S.; Drake, A. J.; Djorgovski, S. G.; Mahabal, A.; Graham, M. J.; Williams, R.; Prieto, J. L.; Catelan, Marcio; Beshore, E. C.; Larson, S. M.; Christensen, E.; Valenti, S.; Cappellaro, E.; Benetti, S.; Turatto, M.; Pastorello, A.
    Report the discovery of an apparent supernova in public images from the Mount Lemmon Survey: SN 2011 UT R.A. (2000.0) Decl. Mag. Offset 2011gp Sep. 30.45 4 39 08.04 +11 31 51.6 18.4 5".1 E, 1".7 N This variable was designated PSN J04390804+1131516 when it was posted on the Central Bureau's TOCP webpage and is here designated SN 2011?? based on the spectroscopic report below. S. Valenti, E. Cappellaro, S. Benetti, Osservatorio Astronomico di Padova, Istituto Nazionale di Astrofisica (INAF); M. Turatto, Osservatorio Astronomico di Trieste, INAF; and A. Pastorello, Dipartimento di Astronomia, Universita di Padova, on behalf of a larger collaboration, report that a spectrogram (range 360-810 nm; resolution 2.2 nm) of PSN J04390804+1131516 = SN 2011gp, obtained on Sept. 30.95 UT with the Ekar-Copernico 1.82-m telescope (+ AFOSC), shows a red continuum, strong H_alpha emission, Na I D, and other lines typical of type-II supernovae. Cross-correlation with a library of supernova spectra via the "Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024), suggests that 2011gp is a couple of months after maximum light....
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    Supernova 2011gq = Psn J21422844-1606305
    (2011) Howerton, S.; Drake, A. J.; Djorgovski, S. G.; Mahabal, A.; Graham, M. J.; Williams, R.; Prieto, J. L.; Catelan, Marcio; McNaught, R. H.; Garradd, G.; Beshore, E. C.; Larson, S. M.; Christensen, E.; Magill, L.; Kotak, R.; Nielsen, M. B.
    Report the discovery of an apparent supernova in public images from the Mount Lemmon Survey. SN 2011 UT R.A. (2000.0) Decl. Mag. Offset 2011gq Sep. 26.24 21 42 28.44 -16 06 30.5 19.2 9".4 W, 7".6 N This variable was designated PSN J21422844-1606305 when it was posted on the Central Bureau's TOCP webpage and is here designated SN 2011gq based on the spectroscopic report below. Joseph Brimacombe, Cairns, Australia, reports position end figures 28s.38, 30".5 from an unfiltered CCD image taken on Sept. 27.265 UT (image at URL http://www.flickr.com/photos/43846774@N02/6191438300/). Additional unfiltered CCD magnitudes for 2011gq: Sept. 28.870, 19.2 (Federica Luppi and Luca Buzzi, Varese, Italy, 0.38-m f/6.8 reflector; position end figures 28s.41, 30".0; CMC-14 catalogue reference stars; image posted at URL http://www.astrogeo.va.it/pub/TOCP/PSN_P902335.jpg); 29.214, 19.8 (Brimacombe; image posted at http://www.flickr.com/photos/43846774@N02/6196354104/). L. Magill and R. Kotak, Queen's University, Belfast, report that an optical spectrogram (range 350-900 nm) of PSN J21422844-1606305 = SN 2011gq was obtained at the Nordic Optical Telescope (+ ALFOSC) by M. B. Nielsen on Sept. 28.85 UT. After cross-correlated with a library of supernova spectra using the "Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024), the best fit was with a normal type-Ia supernova and similar to SN 1998aq at an epoch of 66 days (Branch et al. 2003, A.J. 126, 1489). Fitting with SNID yields a redshift of 0.053....
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    Supernova 2011gt in IC 4913 = Psn J19564826-3719375
    (2011) Howerton, S.; Drake, A. J.; Djorgovski, S. G.; Mahabal, A.; Graham, M. J.; Williams, R.; Prieto, J. L.; Catelan, Marcio; McNaught, R. H.; Garradd, G.; Beshore, E. C.; Larson, S. M.; Christensen, E.; Jacques, C.; Pimentel, E.; Miller, P.; Roche, P.; Tripp, A.; Miles, R.; Holmes, R.; Foglia, S.; Buzzi, L.; Anderson, J.; Pignata, G.
    Report the discovery of an apparent supernova in public images from the Siding Spring Survey (SSS). SN 2011 UT R.A. (2000.0) Decl. Mag. Offset 2011gt Sep. 26.42 19 56 48.26 -37 19 37.5 16.0 7".6 E, 4".5 N The new object was designated PSN J19564826-3719375 when it was posted on the Central Bureau's TOCP webpage and is here designated SN 2011gt based on the spectroscopic confirmation reported below. Additional CCD magnitudes for 2011gt (unfiltered unless otherwise noted): Aug. 22.48 UT, [18.5 (SSS); Sept. 27.109, 15.7 (C. Jacques and E. Pimentel, Belo Horizonte, Brazil; position end figures 48s.25, 37".9; UCAC2 reference stars; image posted at URL http://ceamig-rea.net/SUPERNOVAE/CONFIRMATIONS/PSN_J19564826-3719375/I4913.jpg); 27.467, R = 15.6 (P. Miller, P. Roche, A. Tripp, R. Miles, R. Holmes, S. Foglia, and L. Buzzi with the 2.0-m f/10 Faulkes Telescope South + Bessell R filter at Siding Spring; position end figures 48s.28, 38".0; PPMXL catalogue; image posted at URL http://www.astrogeo.va.it/pub/TOCP/PSN_I4913_FTS.jpg); 27.467, R = 17.5 (Joseph Brimacombe, Cairns, Australia; position end figures 48s.27, 37".3; image at http://www.flickr.com/photos/43846774@N02/6190491181/); Oct. 1.560, R = 17.6 (Brimacombe; image posted at the following website URL: http://www.flickr.com/photos/43846774@N02/6203147137/). J. Anderson, Universidad de Chile; and G. Pignata, Universidad Andres Bello, on behalf of the Millennium Center for Supernova Science, report that they obtained a spectrogram of PSN J19564826-3719375 = SN 2011gt on Sept. 30.1 UT with the Magellan II Clay 6.5-m telescope (+ LDSS3) at Las Campanas Observatory, which shows it to be a type-Ia supernova. Comparison with a library of supernova spectra via the "Supernova Identification" tool (Blondin and Tonry 2007, Ap.J. 666, 1024) provides very good matches with normal type-Ia events around 3 weeks past maximum light....