A. Gal-Yam (Author), T. Petrushevska (Author)

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

supernovae;transient;

Data

Language: English
Year of publishing:
Typology: 1.25 - Other Component Parts
Organization: UNG - University of Nova Gorica
UDC: 524
COBISS: 5011707 Link will open in a new window
ISSN: Y507-5343
Views: 2427
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Other data

URN: URN:SI:UNG
Type (COBISS): Not categorized
Pages: str. 1
Issue: ǂNo. ǂ7567
Chronology: 2015
ID: 10900656