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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/56642
- SN 1997cy/GRB 970514: a new piece in the gamma-ray burst puzzle?
- Germany, Lisa M.; Reiss, David J.; Sadler, Elaine M.; Schmidt, Brian P.; Stubbs, C. W.
- We present observations of SN 1997cy, a supernova (SN) discovered as part of the Mount Stromlo Abell Cluster SN Search (Reiss et al.), which does not easily fit into the traditional classification scheme for supernovae. This object's extraordinary optical properties and coincidence with GRB 970514, a short duration gamma-ray burst (GRB), suggest a second case, after SN 1998bw/GRB 980425, for a SN-GRB association. SN 1997cy is among the most luminous SNe yet discovered (MR « -20.1, Ho = 65) and has a peculiar spectrum. We present evidence that SN 1997cy ejected approximately 2.6 Mo of 56Ni, supported by its late-time light curve and Fe II/[Fe III] lines in its spectrum, although it is possible that both these observations can be explained via circumstellar interaction. While SN 1998bw and SN 1997cy appear to be very different objects with respect to both their gamma-ray and optical properties, SN 1997cy and the optical transient associated with GRB 970508 have roughly similar late-time optical behavior. This similarity may indicate that the late-time optical output of these two intrinsically bright transient events have a common physical process. Although the connection between GRB 970514 and SN 1997cy is suggestive, it is not conclusive. However, if this association is real, follow-up of short duration GRBs detected with BATSE or HETE2 should reveal objects similar to SN 1997cy.
- Publication type
- Journal article
- Astrophysical Journal, Vol. 533, no. 1 (Apr 2000), pp. 320-328
- Publication year
- FOR Code(s)
- 0201 Astronomical and Space Sciences; 020110 Stellar Astronomy and Planetary Systems
- Gamma rays; Gamma-ray bursts; GRB; Mount Stromlo Abell Cluster SN Search; SN 1997cy; SN; Supernovae
- University of Chicago Press
- Publisher URL
- Copyright © 2000 The American Astronomical Society. All rights reserved. Publisher does not officially support author/institution self-archiving of either the postprint (final, revised accepted draft) or published version of full text.
- Peer reviewed