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Title:iPTF discovery of iPTF15ayt, a young Type II Supernova showing flash-spectroscopy signatures, and an HST target
Authors:ID Gal-Yam, Avishay, Department of Particle Physics and Astrophysics, Faculty of Physics, The Weizmann Institute of Science, Rehovot 76100, Israel. (Author)
ID Petrushevska, Tanja, The Oskar Klein Centre, Department of Physics, Stockholm University, AlbaNova, SE-106 91 Stockholm, Sweden (Author), et al.
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Language:English
Work type:Not categorized
Typology:1.25 - Other Component Parts
Organization:UNG - University of Nova Gorica
Abstract:The intermediate Palomar Transient Factory (ATel#4807) reports the discovery of iPTF15ayt, a young type II SN in a nearby galaxy (redshift z=0.045715, mean distance modulus DM=36.52, metric distance d~202 Mpc; NED). The transient was discovered on 2015 May 26.32 UT at RA(J2000) = 14:56:27.85, DEC(J2000) = +18:22:24.7, at a magnitude of 19.6 in the PTF g-band (calibrated with respect to SDSS), which corresponds to an absolute magnitude of -16.9 (according to the above DM). A non-detection (3-sigma, to a limiting PTF g-band magnitude of 21.4) was obtained at the location ~24 hr earlier on 2015 May 25.35 UT. A spectrum was promptly obtained on 2015 May 26.45 (~2.5 hours from event confirmation) with the GMOS spectrograph mounted on Gemini-N, showing flash-spectroscopy signatures (Gal-Yam et al., 2014, Nature, 509, 471) - narrow to intermediate width Balmer series emission lines and broader prominent He II 4686 and C IV 5806, all on top of a hot blue continuum. We have triggered the Hubble Space Telescope in order to obtain a series of prompt UV spectra of this event, as well as numerous other follow-up programs. We encourage additional monitoring at all wavelengths of this young supernova.
Keywords:Optical, Ultra-Violet, Supernovae
Publication status:Published
Year of publishing:2015
PID:20.500.12556/RUNG-3635-d76a5c13-d304-1573-316f-3afc8208759f New window
COBISS.SI-ID:5011707 New window
NUK URN:URN:SI:UNG:REP:ZCHH72IG
Publication date in RUNG:24.01.2018
Views:4149
Downloads:0
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GAL-YAM, Avishay and PETRUSHEVSKA, Tanja, 2015, iPTF discovery of iPTF15ayt, a young Type II Supernova showing flash-spectroscopy signatures, and an HST target. In : The astronomer’s telegram [online]. [Accessed 4 April 2025]. Retrieved from: https://repozitorij.ung.si/IzpisGradiva.php?lang=eng&id=3635
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Title:The astronomer's telegram
ISSN:Y507-5343

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