Browsing by Author "Bufano, F."

Now showing 1 - 18 of 18
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    New ATCA, ALMA and VISIR observations of the candidate LBV SK-67 266 (S61): The nebular mass from modelling 3D density distributions
    (2017) Agliozzo, C.; Nikutta, R.; Pignata, Giuliano; Phillips, N. M.; Ingallinera, A.; Buemi, C.; Umana, G.; Leto, P.; Trigilio, C.; Noriega-Crespo, A.; Paladini, R.; Bufano, F.; Cavallaro, F.
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    PESSTO : survey description and products from the first data release by the Public ESO Spectroscopic Survey of Transient Objects
    (2015) Smartt, S. J.; Valenti, S.; Fraser, M.; Inserra, C.; Young, D. R.; Sullivan, M.; Bauer, Franz Erik; Clocchiatti, Alejandro; Romero Cañizales, Cristina; Schulze, S.; Pastorello, A.; Benetti, S.; Gal-Yam, A.; Knapic, C.; Molinaro, M.; Smareglia, R.; Smith, K. W.; Taubenberger, S.; Yaron, O.; Anderson, J. P.; Ashall, C.; Balland, C.; Baltay, C.; Barbarino, C.; Baumont, S.; Bersier, D.; Blagorodnova, N.; Bongard, S.; Botticella, M. T.; Bufano, F.; Bulla, M.; Cappellaro, E.; Campbell, H.; Cellier-Holzem, F.; Chen, T. W.; Childress, M. J.; Contreras, C.; Dall’Ora, M.; Danziger, J.; de Jaeger, T.; De Cia, A.; Della Valle, M.; Dennefeld, M.; Elias Rosa, N.; Elman, N.; Feindt, U.; Fleury, M.; Gall, E.; González Gaitan, S.; Galbany, L.; Morales Garoffolo, A.; Greggio, L.; Guillou, L. L.; Hachinger, S.; Hadjiyska, E.; Hage, P. E.; Hillebrandt, W.; Hodgkin, S.; Hsiao, E. Y.; James, P. A.; Jerkstrand, A.; Kangas, T.; Kankare, E.; Kotak, R.; Kromer, M.; Kuncarayakti, H.; Leloudas, G.; Lundqvist, P.; Lyman, J. D.; Hook, I. M.; Maguire, K.; Manulis, I.; Margheim, S. J.; Mattila, S.; Maund, J. R.; Mazzali, P. A.; McCrum, M.; McKinnon, R.; Moreno Raya, M. E.; Nicholl, M.; Nugent, P.; Pain, R.; Pignata, Giuliano; Phillips, M. M.; Polshaw, J.; Pumo, M. L.; Rabinowitz, D.; Reilly, E.; Scalzo, R.; Schmidt, B.; Sim, S.; Sollerman, J.; Taddia, F.; Tartaglia, L.; Terreran, G.; Tomasella, L.; Turatto, M.; Walker, E.; Walton, N. A.; Wyrzykowski, L.; Yuan, F.; Zampieri, L.
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    SN 2009ib : A Type II-P supernova with an unusually long plateau
    (2015) Takáts, K.; Pignata, Giuliano; Pumo, M. L.; Paillas Villavicencio, Enrique; Zampieri, L.; Elias Rosa, N.; Benetti, S.; Bufano, F.; Cappellaro, E.; Ergon, M.
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    SN 2011hs : a fast and faint Type IIb supernova from a supergiant progenitor
    (2014) Bufano, F.; Pignata, Giuliano; Bersten, M.; Mazzali, P.; Ryder, S.; Margutti, R.; Milisavljevic, D.; Morelli, L.; Benetti, E.; Romero Cañizales, Cristina
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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 2011gs = Psn J04210999+1328044
    (2011) 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.; Bufano, F.; Valenti, S.; Pastorello, A.
    Report the discovery of an apparent supernova in unfiltered Catalina Sky Survey (CSS) images: SN 2011 UT R.A. (2000.0) Decl. Mag. Offset 2011gs Sep. 23.46 4 21 09.99 +13 28 04.4 17.4 10".1 E, 3".7 S This variable was designated PSN J04210999+1328044 when it was posted on the Central Bureau's TOCP webpage and is here designated SN 2011gs based on the spectroscopic report below. Further CCD magnitudes for 2011gs: Mar. 29.15 UT, [19.4 (CSS); Sept. 29.39, 17.6 (CSS); Oct. 2.131, R = 18.9 (Federica Luppi, Varese, Italy; 0.36-m f/7.9 reflector + Bessell R filter; position end figures 10s.03, 04".5; CMC-14 catalogue reference stars; image posted at website URL http://www.astrogeo.va.it/pub/TOCP/PSN_J04210999+1328044.jpg). F. Bufano, Istituto Nazionale di Astrofisica (INAF), Osservatorio Astronomico di Catania; and S. Valenti and A. Pastorello, INAF, Osservatorio Astronomico di Padova, on behalf of a larger collaboration, report that a spectrum of PSN J04210999+1328044 = SN 2011gs, obtained on Oct. 1.95 UT with the Ekar-Copernico 1.82-m telescope (+ AFOSC), shows it 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) suggests a normal type-Ia supernova about 30 after its B-band maximum (the deduced redshift is 0.027).
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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 2011ig = Psn J01055465-1220486
    (2011) 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.; Valenti, S.; Pastorello, A.; Benetti, S.; Tomasella, L.; Bufano, F.; Ochner, P.
    Report the discovery of an apparent supernova in unfiltered Catalina Sky Survey (CSS) images: SN 2011 UT R.A. (2000.0) Decl. Mag. Offset 2011ig Nov. 17.21 1 05 54.65 -12 20 48.6 16.9 0".7 W, 3".7 S The variable was designated PSN J01055465-1220486 when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2011ig based on the spectroscopic confirmation reported below. Additional CCD magnitudes for 2011ig: Oct. 30.28 UT, [17.5 (CSS); Nov. 20.316, 17.5 (J. Brimacombe, Cairns, Australia; luminance filter; position end figures 54s.65, 50".2; image posted at website URL http://www.flickr.com/photos/43846774@N02/6375756043/). 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 spectrogram of PSN J01055465-1220486 = SN 2011ig, obtained on Nov. 20.89 UT with the 1.82-m Copernico Telescope (+ AFOSC; range 340-790 nm, resolution 2.2 nm), suggests that it is a 1991T-like type-Ia supernova. Cross-correlation with a library of supernova spectra via the "Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) indicates that 2011ig is similar to SN 1999aa (Garavini et al. 2004, A.J. 128, 387) around maximum light. Assuming a redshift of z = 0.065, the ejecta velocity deduced from the minimum of the Si II 635-nm line is about 13500 km/s....
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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 2011iw
    (2011) Mahabal, A.; Drake, A. J.; Djorgovski, S. G.; Graham, M. J.; Williams, R.; Prieto, J. L.; Catelan, Marcio; Beshore, E. C.; Larson, S. M.; Christensen, E.; Tomasella, L.; Benetti, S.; Pastorello, A.; Valenti, S.; Bufano, F.; Altavilla, G.
    Report the discovery of a supernova in unfiltered Catalina Sky Survey (CSS) images: SN 2011 UT R.A. (2000.0) Decl. Mag. 2011iw Nov. 29.09 23 34 48.20 +24 45 01.6 16.9 Nothing was visible at this position on a CSS image from Sept. 19.35 UT (limiting mag 19.5). Spectroscopic follow-up observations (range 400-800 nm) were taken with the Palomar 5-m telescope on Nov. 29.25. The spectrum exhibits strong, narrow Balmer emission lines corresponding to a redshift z = 0.023, which are superimposed on a blue continuum. A broad feature is observed near 610 nm that is likely due to He I. The object is thus identified as a likely type-IIn supernova. L. Tomasella, S. Benetti, A. Pastorello, S. Valenti, and F. Bufano, Istituto Nazionale di Astrofisica (INAF), Osservatorio Astronomico di Padova; and G. Altavilla, INAF, Osservatorio Astronomico di Bologna, on behalf of a larger collaboration and the Gaia Science Alerts Follow-up Programme, report that spectrograms of 2011iw, obtained on Nov. 30.80 UT with the Asiago 1.82-m Copernico Telescope (+ AFOSC; range 350-820 nm, resolution 2.4 nm) by the Service Telescope Operating Team and with the Cassini 1.52-m telescope (+ BFOSC; range 490-800 nm; resolution 1.4 nm) on Nov. 30.81, show it to be a type-IIn supernova soon after explosion. The spectrum is dominated by a blue continuum and intense Balmer emissions with a composite profile. They consist of an unresolved component overimposed on a broader line (FWHM about 4000 km/s). A broad bump (FWHM about 4600 km/s) is also present close to the He I 587.6-nm transition. The redshift of the supernova (z about 0.0230) has been derived from the narrow emissions of the Balmer lines....
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    Supernova 2011iz = Psn J03213648+2233461
    (2011) 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.; Elenin, L.; Foglia, S.; Galli, G.; Tomasella, L.; Benetti, S.; Pastorello, A.; Valenti, S.; Bufano, F.
    Report the discovery of an apparent supernova in unfiltered Mount Lemmon Survey (MLS) images: SN 2011 UT R.A. (2000.0) Decl. Mag. Offset 2011iz Nov. 30.26 3 21 36.48 +22 33 46.1 17.6 0".1 W, 15".3 S The variable was designated PSN J03213648+2233461 when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2011iz based on the spectroscopic confirmation reported below. Further CCD magnitudes for 2011iz (unfiltered unless noted otherwise): Oct. 20.43 UT, [20.5 (MLS); Dec. 1.475, 18.2 (Joseph Brimacombe, Cairns, Australia; remotely using a 51-cm RCOS telescope + STL11K camera + luminance filter at New Mexico Skies Observatory near Mayhill, NM, U.S.A.; position end figures 36s.49, 45".7; image posted at website URL http://www.flickr.com/photos/43846774@N02/6438246969/); 4.323, 17.2 (L. Elenin, Lyubertsy, Russia; three 300-s images remotely taken at the ISON-NM Observatory near Mayhill with a 0.45-m f/2.8 telescope + KAF09000 CCD chip; position end figures 36s.47 +/- 0".1, 46".6 +/- 0".1; reference stars from the NOMAD catalogue; stars; limiting mag about 19.8; image posted at URL http://spaceobs.org/images/TOCP/PSNJ03213648+2233461-20111204.png); 6.948, 17.8 (S. Foglia and G. Galli, Pogliano Milanese, Italy; 0.28-m f/6.8 Schmidt- Cassegrain reflector + ST8XME camera; position end figures 36s.49, 46".3; UCAC-2 reference stars); 10.988, 18.9 (Federica Luppi, Varese, Italy; 0.35-m f/7.9 reflector + Bessell-R filter; position end figures 36s.47, 46".4; reference stars from CMC-14 catalogue). L. Tomasella, S. Benetti, A. Pastorello, S. Valenti, and F. Bufano, Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Padova, on behalf of a larger collaboration, report that a spectrogram of PSN J03213648+2233461 = SN 2011iz, obtained on Dec. 15.93 UT with the Asiago 1.82-m Copernico Telescope (+ AFOSC; range 350-820 nm; resolution 2.4 nm), shows it to be a type-Ia supernova. The best fit to this spectrum found by GELATO (Harutyunyan et al. 2008, A.Ap. 488, 383; available at website URL https://gelato.tng.iac.es/login.cgi) suggests that 2011iz is similar to SN 1989B (Barbon et al. 1990, A.Ap. 237, 79) about two weeks after maximum light, if a redshift of 0.038 is assumed for the host galaxy....
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    Supernova 2011jd
    (2011) 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.; Tomasella, L.; Benetti, S.; Pastorello, A.; Valenti, S.; Bufano, F.
    Report the discovery of an apparent supernova in unfiltered Catalina Sky Survey (CSS) images: SN 2011 UT R.A. (2000.0) Decl. Mag. Offset 2011jd Nov. 19.17 0 22 54.27 +13 52 22.4 18.3 0".2 W, 2".2 N Further CSS magnitudes for 2011jd: Oct. 15.36 UT, [19.5; Nov. 27.20, 18.1. L. Tomasella, S. Benetti, A. Pastorello, S. Valenti, and F. Bufano, Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Padova, on behalf of a larger collaboration, report that a spectrogram of 2011jd, obtained on Dec. 18.87 UT with the Asiago 1.82-m Copernico Telescope (+ AFOSC; range 350-820 nm; resolution 2.4 nm), shows it to be a type-Ia supernova. The best fit to this spectrum found by GELATO (Harutyunyan et al. 2008, A.Ap. 488, 383; available at website URL https://gelato.tng.iac.es/login.cgi) suggests that 2011jd is similar to type-Ia supernovae between three and four weeks after maximum light, if a redshift of 0.079 is assumed for the host galaxy....
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    Supernova 2011je = Psn J04055376+1328129
    (2011) Howerton, S.; Drake, A. J.; Djorgovski, S. G.; Mahabal, A.; Graham, M. J.; Williams, R.; Catelan, Marcio; Beshore, E. C.; Larson, S. M.; Christensen, E.; Koff, R. A.; Miller, P.; Roche, P.; Tripp, A.; Miles, R.; Holmes, R.; Foglia, S.; Buzzi, L.; Galli, G.; Tomasella, L.; Benetti, S.; Pastorello, A.; Valenti, S.; Bufano, F.
    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 2011je Nov. 27.39 4 05 53.76 +13 28 12.9 18.4 11".4 W, 2".4 S The variable was designated PSN J04055376+1328129 when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2011je based on the spectroscopic confirmation reported below. Additional CCD magnitudes for 2011je (unfiltered unless noted otherwise): Nov. 28.340 UT, 17.8 (R. A. Koff, Bennett, CO, USA; Meade 0.25-m f/10 Schmidt-Cassegrain reflector + Apogee AP-47p camera; limiting magnitude 20.0; position end figures 53s.77, 11".0; UCAC3 reference stars); 28.395, 18.7 (Joseph Brimacombe, Cairns, Australia; remotely using a 51-cm RCOS telescope + STL11K camera + luminance filter at the New Mexico Skies Observatory near Mayhill, NM, U.S.A.; position end figures 53s.85, 12".4); 28.477, R = 18.0 (P. Miller, P. Roche, A. Tripp, R. Miles, R. Holmes, S. Foglia, and L. Buzzi with the 2.0-m f/10 "Faulkes Telescope North" + Bessell R filter at Haleakala; seeing 1".2; position end figures 53s.83, 12".6; image posted at the following website URL: www.astrogeo.va.it/pub/TOCP/PSNJ04055376+1328129_FTN.jpg); Dec. 6.975, 17.3 (S. Foglia and G. Galli, Pogliano Milanese, Italy; 0.28-m f/6.8 Schmidt- Cassegrain reflector + ST8-XME camera; position end figures 53s.79, 12".6; UCAC-2 reference stars). Brimacombe's image is posted at website URL http://www.flickr.com/photos/43846774@N02/6423174897/. L. Tomasella, S. Benetti, A. Pastorello, S. Valenti, and F. Bufano, Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Padova, on behalf of a larger collaboration, report that a spectrogram of PSN J04055376+1328129 = SN 2011je, obtained on Dec. 18.93 UT with the Asiago 1.82-m Copernico Telescope (+ AFOSC; range 350-820 nm; resolution 2.4 nm), shows it to be a peculiar type-II supernova most similar to SN 1994aj at a phase of 43 days after maximum light (Benetti et al. 1998, MNRAS 294, 448). The spectrum is dominated by a broad H-alpha emission (FWHM about 13000 km/s) overimposed with a narrow (not resolved) feature with P-Cyg profile, from which an expantion velocity of < 1100 km/s is deduced (the redshift of the parent galaxy, 0.0174, has been derived from the peak of the narrow H-alpha emission)....
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    Supernova 2011ji
    (2011) Drake, A. J.; Graham, M. J.; Mahabal, A.; Williams, R.; Djorgovski, S. G.; Prieto, J. L.; Catelan, Marcio; Beshore, E. C.; Larson, S. M.; Christensen, E.; Tomasella, L.; Valenti, S.; Benetti, S.; Bufano, F.; Fiaschi, M.; Pastorello, A.; Ochner, P.
    Report the discovery of an apparent supernova in unfiltered Mount Lemmon Survey (MLS) images: SN 2011 UT R.A. (2000.0) Decl. Mag. 2011ji Nov. 28.41 9 08 21.16 +16 33 37.1 18.5 Further MLS magnitudes for 2011ji: May 13.21 UT, [19.2; Dec. 24.47, 18.9. L. Tomasella, S. Valenti, S. Benetti, F. Bufano, M. Fiaschi, A. Pastorello, and P. Ochner, Osservatorio Astronomico di Padova, Istituto Nazionale di Astrofisica, on behalf of a larger collaboration, report that a spectrogram of 2011ji, obtained on Dec. 24.02 UT with the Asiago 1.82-m Copernico Telescope (+ AFOSC; range 350-820 nm; resolution 2.4 nm), suggests that 2011ji is a type-Ia supernova around one month after maximum. Using GELATO (Harutyunyan et al. 2008, A.Ap. 488, 383; available at website URL https://gelato.tng.iac.es/login.cgi), the spectrum is found to be similar to that of SN 1999gp at 34 days past maximum. A narrow H_alpha feature is visible in the spectrum, fixing the redshift at z = 0.089. However, because of the poor resolution of the spectrum, it cannot be verified if H_alpha is circumstellar or due to a contaminating H II region....
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    Supernova 2011jj in Pgc 5364 = Psn J01263180+3137026
    (2011) Howerton, S.; Drake, A. J.; Djorgovski, S. G.; Mahabal, A.; Graham, M. J.; Williams, R.; Catelan, Marcio; Beshore, E. C.; Larson, S. M.; Christensen, E.; Tomasella, L.; Valenti, S.; Benetti, S.; Bufano, F.; Fiaschi, M.; Pastorello, A.; Ochner, 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 2011jj Dec. 1.09 1 26 31.80 +31 37 02.6 19.8 23".0 W, 3".8 N Note that the position is close to SN 2011ix (cf. CBET 2942), which is also seen in some of the follow-up CSS images. The variable was designated PSN J01263180+3137026 when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2011jj based on the spectroscopic confirmation reported below. Additional magnitudes for 2011jj (unfiltered unless noted otherwise): Sept. 22.24 UT, [20.2 (CSS); Oct. 16.183, 19.1 (Joseph Brimacombe, Cairns, Australia; remotely using a 51-cm RCOS telescope + STL11K camera + luminance filter at the New Mexico Skies Observatory near Mayhill, NM, U.S.A.; position end figures 31s.76, 02".8); 18.22, 19.3 (CSS); 24.33, 19.5 (CSS); Nov. 1.25, 19.3 (CSS); 1.403, 19.4 (Brimacombe; position end figures 31s.82, 02".8); Dec. 18.213, 19.5 (Brimacombe; position end figures 31s.80, 03".0). Brimacombe's Oct. 16 image is posted at the following website URL: http://www.flickr.com/photos/43846774@N02/6536985993/; his Nov. 1 image is posted at http://www.flickr.com/photos/43846774@N02/6539516343/; and his Dec. 18 image is posted at http://www.flickr.com/photos/43846774@N02/6536691675/. L. Tomasella, S. Valenti, S. Benetti, F. Bufano, M. Fiaschi, A. Pastorello, and P. Ochner, Osservatorio Astronomico di Padova, Istituto Nazionale di Astrofisica, on behalf of a larger collaboration, report that a spectrogram of PSN J01263180+3137026 = SN 2011jj, obtained on Dec. 23.77 UT with the Asiago 1.82-m Copernico Telescope (+ AFOSC; range 350-820 nm; resolution 2.4nm), suggests that it is a type-IIP supernova around 50 days after explosion. Cross-correlation with a library of supernova spectra via the "Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) indicates that 2011jj is similar to SN 2004et (Maguire et al. 2010, MNRAS 404, 981)....
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    Supernova 2011jk in UGC 3843 = Psn J07274305+2006217
    (2011) Howerton, S.; Drake, A. J.; Djorgovski, S. G.; Mahabal, A.; Graham, M. J.; Williams, R.; Catelan, Marcio; Beshore, E. C.; Larson, S. M.; Christensen, E.; Tomasella, L.; Valenti, S.; Benetti, S.; Bufano, F.; Fiaschi, M.; Pastorello, A.; 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 2011jk Nov. 27.39 7 25 43.05 +20 06 21.7 19.2 10".5 W, 13".7 N The variable was designated PSN J07274305+2006217 when it was posted at the Central Bureau's TOCP webpage because the right ascension was originally posted erroneously as 27' instead of the proper 25'; the variable is here designated SN 2011jk based on the spectroscopic confirmation reported below. Additional CCD magnitudes for 2011jk (unfiltered unless noted otherwise): Mar. 5.20 UT, [20.6 (MLS); Nov. 28.319, 18.6 (Joseph Brimacombe, Cairns, Australia; remotely using a 51-cm RCOS telescope + STL11K camera + luminance filter at the New Mexico Skies Observatory near Mayhill, NM, U.S.A.; position end figures 43s.13, 22".0); Dec. 24.42, 19.0 (MLS). Brimacombe's image is posted at website URL http://www.flickr.com/photos/43846774@N02/6421768255/. L. Tomasella, S. Valenti, S. Benetti, F. Bufano, M. Fiaschi, A. Pastorello, and P. Ochner, Osservatorio Astronomico di Padova, Istituto Nazionale di Astrofisica, on behalf of a larger collaboration, report that a low-signal-to-noise spectrogram of PSN J07274305+2006217 = SN 2011jk, obtained on Dec. 23.97 UT with the Asiago 1.82-m Copernico Telescope (+ AFOSC; range 350-820 nm; resolution 2.4 nm), suggests that it is a type-IIP supernova, similar to SN 2005cs (Pastorello et al. 2009, MNRAS 394, 2266) at a couple of months after the explosion....
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    Supernova 2012bu in NGC 3449 = Psn J10525661-3256071
    (2012) 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.; Morrell, N.; Lopez, P.; Lira, P.; Pignata, G.; Bufano, F.
    Report the discovery of an apparent supernova in public images from the Siding Spring Survey (SSS). SN 2012 UT R.A. (2000.0) Decl. Mag. Offset 2012bu Jan. 16.69 10 52 56.61 -32 56 07.1 18.4 37".2 E, 27".7 S The variable was designated PSN J10525661-3256071 when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2012bu based on the spectroscopic confirmation reported below. Further CCD magnitudes for 2012bu: 2010 June 26.40 UT, [19.2 (SSS); 2012 Jan. 18.436, 17.9 (Joseph Brimacombe, Cairns, Australia; 51-cm RCOS telescope + STL11K camera + luminance filter at the New Mexico Skies Observatory near Mayhill, NM, U.S.A.; position end figures 56s.53, 07".7); 18.45, 18.3 (L. Elenin, Lyubertsy, Russia; remotely taken at the ISON-NM Observatory near Mayhill with a 0.45-m f/2.8 telescope; position end figures 56s.52, 07".7; UCAC3 reference stars; limiting mag about 20.0). The image by Brimacombe is posted at the following website URL: http://www.flickr.com/photos/43846774@N02/6722843895/. N. Morrell, Las Campanas Observatory; P. Lopez and P. Lira, Universidad de Chile; and G. Pignata and F. Bufano, Universidad Andres Bello, report that an optical spectrogram (range 370-910 nm) of PSN J10525661-3256071 = SN 2012bu, obtained on Mar. 30.14 UT with the du Pont 2.5-m telescope (+ WFCCD) at Las Campanas Observatory, shows it to be a type-II supernova. Adopting a recession velocity of 3274 km/s for NGC 3449 (Theureau et al., 1998, A.Ap. Suppl. 130, 333; via NED), the best fits to this spectrum found by GELATO (Harutyunyan et al. 2008, A.Ap. 488,383; publicly available at website URL https://gelato.tng.iac.es) is with spectra of evolved type-II-plateau supernovae.
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    The delay of shock breakout due to circumstellar material evident in most type II supernovae
    (2018) Forster, F.; Moriya, T. J.; Maureira, J. C.; Anderson, J. P.; Blinnikov, S.; Bufano, F.; Cabrera Vives, G.; Clocchiatti, Alejandro; De Jaeger, T.; Estevez, P. A.; Galbany, L.; González -Gaitán, S.; Grafener, G.; Hamuy, M.; Hsiao, E. Y.; Huentelemu, P.; Huijse, P.; Kuncarayakti, H.; Martínez, J.; Medina, G.; Olivares, F.; Pignata, Giuliano; Razza, A.; Reyes, I.; San Martín, J.; Smith, R. C.; Vera, E.; Vivas, A. K.; Postigo, A. D.; Yoon, S. C.; Ashall, C.; Fraser, M.; Gal-Yam, A.; Kankare, E.; Le Guillou, L.; Mazzali, P. A.; Walton, N. A.; Young, D. R.