Supernova 2011hd in PGC 28823 = PSN J09584830+3447033.

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dc.catalogadordfo
dc.contributor.authorDrake, A. J.
dc.contributor.authorDjorgovski, S. G.
dc.contributor.authorMahabal, A.
dc.contributor.authorGraham, M. J.
dc.contributor.authorWilliams, R.
dc.contributor.authorPrieto, J. L.
dc.contributor.authorCatelan, Marcio
dc.contributor.authorBeshore, E. C.
dc.contributor.authorLarson, S. M.
dc.contributor.authorChristensen, E.
dc.contributor.authorBrimacombe, J.
dc.contributor.authorKoff, R. A.
dc.contributor.authorLuppi, F.
dc.date.accessioned2024-03-05T15:15:26Z
dc.date.available2024-03-05T15:15:26Z
dc.date.issued2011
dc.description.abstractReport the discovery of an apparent supernova in unfiltered Catalina Sky Survey (CSS) images: SN 2011 UT R.A. (2000.0) Decl. Mag. Offset 2011hd Oct. 24.51 9 58 48.30 +34 47 03.3 15.9 6".8 E, 7".9 S The variable was designated PSN J09584830+3447033 when it was posted on the Central Bureau's TOCP webpage and is here designated SN 2011hd based on the spectroscopic confirmation reported below. Additional CCD magnitudes (unfiltered unless otherwise noted) for 2011hd: Apr. 29.26 UT, [20.5 (CSS); Oct. 25.463, 15.9 (J. Brimacombe, Cairns, Australia; position end figures 48s.33, 03".7); 28.425, 16.2 (R. A. Koff, Bennett, CO, USA, Meade 0.25-m f/10 reflector + Apogee AP-47p camera; position end figures 48s.31, 03".2; image scale 2"/pixel; limiting magnitude 19.0); 30.112, R = 16.0 (Federica Luppi, Varese, Italy, 0.36-m f/7.9 reflector + Bessell R filter; position end figures 48s.34, 03".5; reference stars from CMC-14 catalogue; image posted at URL http://www.astrogeo.va.it/pub/TOCP/PSN_09584830+3447033.jpg). Brimacombe's image is posted at URL http://www.flickr.com/photos/43846774@N02/6281645148/. 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 J09584830+3447033 = 2011hd 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 2011hd 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 2003du at +18 days and z = 0.015. L. Tomasella, A. Pastorello, S. Valenti, and S. Benetti, Istituto Nazionale di Astrofisica (INAF), Osservatorio Astronomico di Padova, on behalf of a larger collaboration, report that a spectrogram of 2011hd, obtained on Oct. 30.12 UT with the Ekar-Copernico 1.82-m telescope (+ AFOSC; range 360-810 nm; resolution 2.2 nm), is that of a type-Ia supernova. Comparison of the observed spectrum with a library of supernova spectra, using the "GELATO" code (Harutyunyan et al. 2008, A.Ap. 488, 383), suggests a normal type-Ia supernova 2-3 weeks after its B-band maximum brightness. The expansion velocity derived from the Si II 635.5-nm minimum is about 10000 km/s.
dc.fuente.origenORCID
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/84181
dc.information.autorucInstituto de Astrofísica; Catelan , Marcio; 0000-0001-6003-8877; 1001556
dc.language.isoen
dc.rightsacceso restringido
dc.titleSupernova 2011hd in PGC 28823 = PSN J09584830+3447033.
dc.typeinforme
sipa.codpersvinculados1001556
sipa.trazabilidadORCID;2024-01-22
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