Browsing by Author "McNaught, R. H."

Now showing 1 - 20 of 33
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    Discovery of ~9000 new RR Lyrae in the southern Catalina surveys
    (2015) Torrealba, G.; Catelan, Márcio; Drake, A. J.; Djorgovski, S. G.; McNaught, R. H.; Belokurov, V.; Koposov, S.M.; Graham, M. J.; Mahabal, A.; Larson, S.; Christensen, E.
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    Supernova 2010gu
    (2010) 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.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.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.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.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.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.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.
    Further to CBET 2387, R. H. McNaught and G. Garradd, Australian National University; 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 CRTS discovery of an apparent supernova in unfiltered Siding Spring Survey (SSS) images: SN 2010 UT R.A. (2000.0) Decl. Mag. Offset 2010gu Aug. 7.67 22 19 23.16 -36 58 24.5 18.0 7".0 E, 3".3 N Further SSS magnitudes for 2010gu: July 9.81, [19.5; Aug. 10.76, 17.9. The host galaxy, 2MASX J22192259-3658278, has redshift z = 0.056....
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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 2010lr
    (2011) 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 CRTS discovery of an apparent supernova in unfiltered Siding Spring Survey (SSS) images: SN 2010 UT R.A. (2000.0) Decl. Mag. Offset 2010lr Dec. 30.46 0 02 35.50 -30 43 52.4 18.0 19".4 E, 13".3 N Further SSS magnitudes for 2010lr: 2010 Nov. 4.58 UT, [20.1; Dec. 28.47, 17.9. The presumed host galaxy, 2MASX J00023401-3044061, has redshift z = 0.062....
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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 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....
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    Supernova 2011gx in ESO 252-G10 = Tcp J05060576-4503003
    (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.; Ochner, P.; Valenti, S.; Benetti, S.; Pastorello, A.; Tomasella, L.; Bufano, F.
    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 2011gx Oct. 3.69 5 06 05.76 -45 03 00.3 18.3 41".5 W, 10".7 S Nothing was visible at this position on a SSS image from Mar. 5.52 UT (limiting mag 19.5). The object was designated TCP J05060576-4503003 when it was posted on the Central Bureau's TOCP webpage and is here designated SN 2011gx based on the spectroscopic confirmation reported below. Infrared CCD magnitudes (filter bandpass > 700 nm) for 2011gx by Joseph Brimacombe, Cairns, Australia: Oct. 5.584, 16.8 (position end figures 05s.76, 00".7); 6.701, 16.6 (image posted at URL http://www.flickr.com/photos/43846774@N02/6218866501/); 8.780, 16.7; 9.638, 16.5; 10.769, 16.6; 12.675, 16.6 (image posted at website URL http://www.flickr.com/photos/43846774@N02/6238615803/). P. Ochner, S. Valenti, S. Benetti, A. Pastorello, and L. Tomasella, 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 TCP J05060576-4503003 = SN 2011gx, obtained on Oct. 18.17 UT with the New Technology Telescope (+ EFOSC2; range 360-930 nm; resolution 1.8 nm) shows it to be a type-II supernova. The best fit to this spectrum found by GELATO (Harutyunyan et al. 2008, A.Ap. 488, 383; publicly available at https://gelato.tng.iac.es) is with spectra of type- II-plateau supernovae at about one month post-explosion. Together with the classical P-Cyg Balmer features, prominent lines of Ca II, Fe II, and Na I D are detected. Adopting a recessional velocity of 9821 km/s for ESO 252-G10 (Lauberts and Valentijn, 1989, THE SURFACE PHOTOMETRY CATALOGUE OF THE ESO- UPPSALA GALAXIES, European Southern Obsrvatory) the expansion velocity deduced from the H_alpha absorption is about 8000 km/s....
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    Supernova 2011hb = PSN J23275551+0846457
    (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.; Elenin, L.; Jacques, C.; Pimentel, E.
    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 2011hb Oct. 24.24 23 27 55.51 + 8 46 45.7 18.8 6".7 W, 25".2 S The variable was designated PSN J23275551+0846457 when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2011hb based on the spectroscopic confirmation reported below. Additional unfiltered CCD magnitudes for 2011hb: Oct. 6.19 UT, [20.5 (CSS); 16.24, 20.3 (CSS); 26.082, 17.3 (L. Elenin, remotely using a 0.45-m f/2.8 astrograph at the ISON-NM Observatory near Mayhill, NM, USA; limiting mag about 19.7; position end figures 55.s.55, 45".5; NOMAD reference stars; image posted at website URL http://spaceobs.org/images/TOCP/PSNJ23275551+0846457.jpg); 26.142, 17.5 (C. Jacques and E. Pimentel, Belo Horizonte, Brazil; remotely using the GRAS G05 telescope in New Mexico; position end figures 55s.59, 45".2; UCAC2 reference stars; limiting magnitude 19.0; image posted at the following website URL: http://ceamig-rea.net/tocp/ngc7674_tocp.jpg). 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 J23275551+0846457 = SN 2011hb was obtained on Oct. 28 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 2011hb is a type-Ia supernova several days before maximum light. SNID finds that the best fit is to a template from the normal type-Ia supernova 2005cf at -10 days. The Si II 635.5-nm feature is broad and asymmetrical; an estimated redshift of z = 0.028924 for NGC 7674 (Nishiura et al. 2000, A.J. 120, 1691) is used to measure the velocity at the minimum of this feature to be about 14700 km/s
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    Supernova 2011hm in Pgc 7743 = Psn J02021338-0605016
    (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.; Tomasella, L.; Valenti, S.; Pastorello, A.; Fiaschi, M.; Benetti, S.
    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 2011hm Oct. 27.35 2 02 13.38 - 6 05 01.6 18.8 3".2 E, 17".5 S This variable was designated PSN J02021338-0605016 when it was posted on the Central Bureau's TOCP webpage and is here designated SN 2011hm based on the spectroscopic confirmation reported below. Further CCD magnitudes for 2011hm (unfiltered unless noted otherwise): Oct. 17.26 UT, [19.2 (CSS); 30.011, R = 17.2 (Federica Luppi, Varese, Italy; 0.36-m f/7.9 reflector + Bessell R filter; position end figures 13s.50, 00".8; reference stars from CMC-14 catalogue); 30.229, 17.8 (Joseph Brimacombe, Cairns, Australia; position end figures 13s.46, 00".9). Luppi's image is posted at the following website URL: http://www.astrogeo.va.it/pub/TOCP/PSN_G-1-6-31.jpg. Brimacombe's image is posted at URL http://www.flickr.com/photos/43846774@N02/6297260951/. L. Tomasella, S. Valenti, A. Pastorello, M. Fiaschi, and S. Benetti, Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Padova, on behalf of a larger collaboration, report that a low-S/N spectrogram of PSN J02021338-0605016 = SN 2011hm was obtained on Oct. 30.94 UT with the Ekar- Copernico 1.82-m telescope (+ AFOSC; range 380-820 nm; resolution 2.2 nm). A comparison of the observed spectrum with a library of supernova spectra using the "GELATO" code (Harutyunyan et al. 2008, A.Ap. 488, 383) suggests that 2011hm is a type-II supernova. A broad H_alpha feature with P-Cyg profile is visible, along with a number of Fe II features. From the position of the minimum of the H_alpha absorption, an expansion velocity of the ejecta of about 13000 km/s is deduced....
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    Supernova 2011ho in NGC 3847 = Psn J11441295+3330581
    (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.; Foley, R. J.; Kasen, D.; Filippenko, A. V.; Marion, G. H.; Berlind, P.
    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 2011ho Oct. 28.49 11 44 12.95 +33 30 58.1 18.7 12".8 W, 5".8 N This variable was designated PSN J11441295+3330581 when it was posted on the Central Bureau's TOCP webpage and is here designated SN 2011ho based on the spectroscopic confirmation reported below. Further unfiltered CCD magnitudes for 2011ho: June 11.21 UT, [19.0 (CSS); Oct. 30.495, 18.3 (Joseph Brimacombe, Cairns, Australia; position end figures 13s.10, 59".2; image posted at website URL http://www.flickr.com/photos/43846774@N02/6297040020/). R. J. Foley, Harvard-Smithsonian Center for Astrophysics; and D. Kasen and A. V. Filippenko, University of California, Berkeley, report that a CCD spectrum (range 310-1020 nm), obtained on Oct. 31 UT with the Keck I 10-m telescope (+ LRIS), shows that PSN J11441295+3330581 = SN 2011ho is a type-Ia supernova near maximum brightness. The spectrum exhibits a large Si II 597.2-nm/635.5-nm ratio, indicating a cooler photosphere and a lower luminosity. The spectrum is similar to that of SN 1986G at -3 days (Phillips et al. 1987, PASP 99, 592), but it also resembles spectra of the more typical type-Ia supernovae 1992A and 2004eo at a similar epoch. After removing the recession velocity of 9520 km/s (obtained from the Sloan Digital Sky Survey), the minimum of the Si II 635.5-nm feature is blueshifted by 11700 km/s. 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 J11441295+3330581 = 2011ho was obtained on Nov. 3 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 2011ho is a 1991bg-like type-Ia supernova near maximum light. Good fits can be found to several templates of normal and 1991bg-like type-Ia supernovae within three days of maximum. The presence of a strong feature from Si II 597.2-nm and the reported brightness of 2011ho are consistent with a subluminous, or 1991bg-like, type-Ia supernova. Using an estimated redshift of z = 0.031829 for NGC 3847 as reported in NED (de Vaucouleurs et al. 1991, RC3.9C), the velocity of the Si II 635.5-nm and 597.2-nm features are estimated to be 10700 km/s and 10500 km/s, respectively....
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    Supernova 2011id = Psn J02574049-5102281
    (2011) McNaught, R. H.; Garradd, G.; Drake, A. J.; Djorgovski, S. G.; Graham, M. J.; Mahabal, A.; Williams, R.; Prieto, J. L.; Catelan, Marcio; Beshore, E. C.; Larson, S. M.; Christensen, E.; Brimacombe, J.; Sanders, N.; Milisavljevic, D.; Soderberg, A.
    Report the discovery of an apparent supernova in unfiltered Siding Spring Survey (SSS) images: SN 2011 UT R.A. (2000.0) Decl. Mag. Offset 2011id Nov. 1.59 2 57 40.49 -51 02 28.1 18.2 6".9 E, 4".9 S The variable was designated PSN J02574049-5102281 when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2011id based on the spectroscopic confirmation reported below. Additional CCD magnitudes for 2011id: Aug. 28.77 UT, [19.2 (SSS); Nov. 2.635, 18.0 (J. Brimacombe, Cairns, Australia; infrared filter, bandpass > 700 nm; position end figures 40s.51, 27".8; image posted at http://www.flickr.com/photos/43846774@N02/6306763959/). N. Sanders, D. Milisavljevic, and A. Soderberg, Harvard University, report that low-dispersion spectra (range 400-930 nm), obtained on Nov. 18.3 UT with the Magellan-Baade telescope (+ IMACS), show PSN J02574049-5102281 = SN 2011id to be a type-Ia supernova. Cross-correlation with a library of supernova spectra using the "Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) shows matches with normal type-Ia events between +20 and +40 days....
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    Supernova 2011ih in UGC 1774 = Psn J02182782+0533165
    (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.; Pastorello, A.; Benetti, S.; Tomasella, L.; Bufano, F.; Ochner, P.
    Report the discovery of an apparent supernova in public images from the Mount Lemmon Survey (MLS). SN 2011 UT R.A. (2000.0) Decl. Mag. Offset 2011ih Nov. 19.12 2 18 27.82 + 5 33 16.5 19.5 7".1 E, 3".4 N The variable was designated PSN J02182782+0533165 when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2011ih based on the spectroscopic confirmation reported below. Additional CCD magnitudes for 2011ih: Nov. 1.34 UT, 19.4 (MLS); 21.184, 18.4 (Joseph Brimacombe, Cairns, Australia; luminance filter presumed; position end figures 27s.64, 16".4; image posted at URL http://www.flickr.com/photos/43846774@N02/6376386519/). S. Valenti, A. Pastorello, S. Benetti, L. Tomasella, F. Bufano, and P. Ochner, Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Padova, on behalf of a larger collaboration, report that a low-signal-to-noise spectrogram of PSN J02182782+0533165 = SN 2011ih, obtained on Nov. 20.93 UT with the 1.82-m Copernico Telescope (+ AFOSC; range 340-790 nm, resolution 2.2 nm), shows that 2011ih is a type-II supernova at a redshift z = 0.030. A narrow component of H_alpha is also visible, superimposed on the broad P-Cyg profile, which is probably due to the contamination of an H II region in the host galaxy....
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    Supernova 2011ik in UGC 1871 = Psn J02250409+2212519
    (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.; Berlind, P.
    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 2011ik Nov. 24.20 2 25 04.09 +22 12 51.9 17.9 7".1 W, 9".3 S The variable was designated PSN J02250409+2212519 when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2011ik based on the spectroscopic confirmation reported below. Additional CCD magnitudes for 2011ik: Nov. 26.292 UT, 18.7 (Joseph Brimacombe, Cairns, Australia; observed remotely using a 51-cm RCOS telescope + STL11K camera + luminance filter at the New Mexico Skies Observatory near Mayhill, New Mexico; position end figures 04s.19, 53".6; image posted at the following website URL: http://www.flickr.com/photos/43846774@N02/6411553661/); 27.350, 17.2 (R. A. Koff, Bennett, CO, USA; Meade 0.25-m f/10 reflector + unfiltered Apogee AP-47p camera; limiting magnitude 18.7; marginal detection in galaxy glow; position end figures 04s.06, 53".0; UCAC3 reference stars). 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 J02250409+2212519 = 2011ik was obtained on Nov. 26 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 2011ik is a type-Ia supernova more than two weeks after maximum light. A good fit is found to the template of the normal type-Ia supernova 2003cg at +24 days....