2020A&A...639A.103S


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.05CET18:39:54

2020A&A...639A.103S - Astronomy and Astrophysics, volume 639A, 103-103 (2020/7-1)

The Carnegie Supernova Project II. Observations of the intermediate-luminosity red transient SNhunt120.

STRITZINGER M.D., TADDIA F., FRASER M., TAURIS T.M., SUNTZEFF N.B., CONTRERAS C., DRYBYE S., GALBANY L., HOLMBO S., MORRELL N., PHILLIPS M.M., PRIETO J.L., ANAIS J., ASHALL C., BARON E., BURNS C.R., HOEFLICH P., HSIAO E.Y., KARAMEHMETOGLU E., MORIYA T.J., BOTTICELLA M.T., CAMPILLAY A., CASTELLON S., GONZALEZ C., PUMO M.L. and TORRES-ROBLEDO S.

Abstract (from CDS):

We present multiwavelength observations of two gap transients that were followed by the Carnegie Supernova Project-II. The observations are supplemented with data obtained by a number of different programs. Here in the first of two papers, we focus on the intermediate-luminosity red transient (ILRT) designated SNhunt120, while in a companion paper we examine the luminous red novae AT 2014ej. Our data set for SNhunt120 consists of an early optical discovery, estimated to be within three days after outburst, the subsequent optical and near-infrared broadband followup extending over a period of about two months, two visual and two near-infrared wavelength spectra, and Spitzer Space Telescope observations extending from early (+28d) to late (+1155d) phases. SNhunt120 resembles other ILRTs such as NGC 300-2008-OT and SN 2008S, and like these other ILRTs, SNhunt120 exhibits prevalent mid-infrared emission at both early and late phases. From the comparison of SNhunt120 and other ILRTs to electron-capture supernova simulations, we find that the current models underestimate the explosion kinetic energy and thereby produce synthetic light curves that overestimate the luminosity. Finally, examination of pre-outburst Hubble Space Telescope images yields no progenitor detection.

Abstract Copyright: © ESO 2020

Journal keyword(s): supernovae: individual: SNhunt120 - supernovae: general

Simbad objects: 10

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Number of rows : 10

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME NGC 300 OT2008-1 ev 00 54 34.16 -37 38 28.6           ~ 110 1
2 NAME AT 2017be ev 08 13 13.38 +45 59 16.8           ~ 9 0
3 PTF 10fqs SN* 12 18 50.16 +14 26 39.2       20.0   ~ 29 0
4 NAME M85 OT2006-1 No* 12 25 23.82 +18 10 56.2     19.30     ~ 58 1
5 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5988 0
6 NAME M51 OT2019-1 ev 13 29 42.394 +47 11 16.99           ~ 12 0
7 LSQ 12brd SN? 14 53 53.95 +03 34 04.9           ~ 6 1
8 NGC 5775 GiP 14 53 57.653 +03 32 40.10   13.0 11.34     ~ 398 2
9 SN 2008S ev 20 34 45.33 +60 05 58.4   19.89 18.79 17.93   SNIIn? 215 1
10 NAME AT 2014ej SN? 23 16 09.79 -42 34 57.5           ~ 4 0

    Equat.    Gal    SGal    Ecl

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2021.03.05-18:39:54

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