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2014•Astronomy and AstrophysicsOpen access

GRB 120422A/SN 2012bz: Bridging the gap between low- and high-luminosity gamma-ray bursts

S. Schulze, D. Malesani, Antonino Cucchiara, N. R. Tanvir, T. Krühler, A. de Ugarte Postigo, G. Leloudas, J. Lyman, D. Bersier, K. Wiersema, D. A. Perley, P. Schady, J. Gorosabel, J. P. Anderson, A. J. Castro‐Tirado, S. B. Cenko, A. De Cia, L. E. Ellerbroek, J. P. U. Fynbo, J. Greiner, J. Hjorth, Д. А. Канн, L. Kaper, S. Klose, A. J. Levan, S. Martín, P. T. O’Brien, K. L. Page, G. Pignata, Sarah Grace Rapaport, R. Sánchez-Ramírez, J. Sollerman, I. A. Smith, Martin Sparre, C. C. Thöne, D. Watson, D. Xu, F. E. Bauer, Matthew Bayliss, G. Björnsson, Michael Bremer, Z. Cano, S. Covino, V. D’Elia, D. A. Frail, S. Geier, P. Goldoni, O. E. Hartoog, P. Jakobsson, H. Korhonen, K. Y. Lee, B. Milvang‐Jensen, M. Nardini, A. Nicuesa Guelbenzu, Masamune Oguri, S. B. Pandey, G. Petitpas, A. Rossi, Andreas Sandberg, S. Schmidl, G. Tagliaferri, R. P. J. Tilanus, J. M. Winters, D. E. Wright, Eva Wuyts

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Abstract

Context. At low redshift, a handful of gamma-ray bursts (GRBs) have been discovered with luminosities that are substantially lower (Liso ≲ 1048.5 erg s-1) than the average of more distant ones (Liso ≳ 1049.5 erg s-1). It has been suggested that the properties of several low-luminosity (low-L) GRBs are due to shock break-out, as opposed to the emission from ultrarelativistic jets. This has led to much debate about how the populations are connected.

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What this paper is about

Context. At low redshift, a handful of gamma-ray bursts (GRBs) have been discovered with luminosities that are substantially lower (Liso ≲ 1048.5 erg s-1) than the average of more distant ones (Liso ≳ 1049.5 erg s-1). It has been suggested that the properties of several low-luminosity (low-L) GRBs are due to shock break-out, as opposed to the emission from ultrarelativistic jets. This has led to much debate about how the populations are connected.

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Available abstract

Context. At low redshift, a handful of gamma-ray bursts (GRBs) have been discovered with luminosities that are substantially lower (Liso ≲ 1048.5 erg s-1) than the average of more distant ones (Liso ≳ 1049.5 erg s-1). It has been suggested that the properties of several low-luminosity (low-L) GRBs are due to shock break-out, as opposed to the emission from ultrarelativistic jets. This has led to much debate about how the populations are connected.

Key concepts: Physics, Astrophysics, Gamma-ray burst, Redshift, Galaxy, Supernova, Luminosity, Spectral energy distribution

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GRB 120422A/SN 2012bz: Bridging the gap between low- and high-luminosity gamma-ray bursts — Research Paper | ScholarLens