GRB 120422A/SN 2012bz: Bridging the gap between low- and high-luminosity gamma-ray bursts
S. SchulzeMillennium Center for Supernova ScienceD. MalesaniDark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, DenmarkAntonino CucchiaraDepartment of Astronomy and Astrophysics, UCO/Lick Observatory, University of California, Santa Cruz, CA 95064, USAN. R. TanvirDepartment of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UKT. KrühlerEuropean Southern Observatory, Alonso de Córdova 3107, Vitacura Casilla 19001, Santiago 19, ChileA. de Ugarte PostigoDark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, DenmarkG. LeloudasAlbaNovaJ. LymanAstrophysics Research Institute, Liverpool John Moores University, IC2, Liverpool Science Park Liverpool L3 5RF, UKD. BersierAstrophysics Research Institute, Liverpool John Moores University, IC2, Liverpool Science Park Liverpool L3 5RF, UKK. WiersemaDepartment of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UKD. A. PerleyDepartment of Astronomy, California and of Technology, MC 249-17, 1200 East California Blvd, Pasadena CA 91125, USAP. SchadyMax-Planck-Institut für extraterrestrische Physik, Giessenbachstrasse 1, 85748 Garching, GermanyJ. GorosabelIkerbasque, Basque Foundation for Science, Alameda de Urquijo 36-5, 48008 Bilbao, SpainJ. P. AndersonDepartamento de Astronoma, Universidad de Chile, Casilla 36-D, Santiago, ChileA. J. Castro‐TiradoInstituto de Astrofsica de Andaluca Consejo Superior de Investigaciones Cientficas (IAA-CSIC), Glorieta de la Astronoma s/n, 18008 Granada, SpainS. B. CenkoDepartment of Astronomy, University of California, Berkeley, CA 94720-3411, USAA. DeDepartment of Particle Physics and Astrophysics, Faculty of Physics, Weizmann Institute of Science, 76100 Rehovot, IsraelL. E. EllerbroekAstronomical and Anton Pannekoek, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The NetherlandsJ. P. U. FynboDark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, DenmarkJ. GreinerMax-Planck-Institut für extraterrestrische Physik, Giessenbachstrasse 1, 85748 Garching, GermanyJ. HjorthDark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, DenmarkД. А. КаннThüringer Landessternwarte Tautenburg, Sternwarte 5, 07778 Tautenburg, GermanyL. KaperAstronomical and Anton Pannekoek, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The NetherlandsS. KloseThringer Landessternwarte Tautenburg, Sternwarte 5, 07778 Tautenburg, GermanyA. J. LevanDepartment of Physics, University of Warwick, Coventry, CV4 7AL, UKS. MartínEuropean Southern Observatory, Alonso de Córdova 3107, Vitacura Casilla 19001, Santiago 19, ChileP. T. O’BrienDepartment of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UKK. L. PageDepartment of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UKG. PignataDepartamento de Ciencias Fisicas, Universidad Andres Bello, Avda. Republica 252, Santiago, ChileSarah Grace RapaportResearch School of Astronomy and Astrophysics, Mount Stromlo Observatory, Cotter Road, Weston Creek, ACT 2611, AustraliaR. Sánchez-RamírezInstituto de Astrofísica de Andalucía Consejo Superior de Investigaciones Científicas (IAA-CSIC), Glorieta de la Astronomía s/n, 18008 Granada, SpainJ. SollermanAlbaNovaI. A. SmithDepartment of Physics and Astronomy, Rice University, 6100 South Main MS-108, Houston, TX 77005-1892, USAMartin SparreDark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, DenmarkC. C. ThöneInstituto de Astrofísica de AndalucíaD. WatsonDark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, DenmarkD. XuDepartment of Particle Physics and Astrophysics, Faculty of Physics, Weizmann Institute of Science, 76100 Rehovot, IsraelF. E. BauerSpace Science Institute, 4750 Walnut Street, Suite 205, Boulder, CO 80301, USAMatthew BaylissDepartment of Physics, Harvard University, 17 Oxford Street, Cambridge, MA 02138, USAG. BjörnssonCentre for Astrophysics and Cosmology, Science and, University of Iceland, Dunhagi 5, 107 Reykjavík, IcelandMichael BremerInstitute de Radioastronomie Millimtrique (IRAM), 300 rue de la Piscine, 38406 Saint Martin d'Hres, FranceZ. CanoCentre for Astrophysics and Cosmology, Science and, University of Iceland, Dunhagi 5, 107 Reykjavík, IcelandS. CovinoINAF -Osservatorio Astronomico di Brera, via E. Bianchi 46 23807 Merate, ItalyV. D’EliaASI-Science Data Center, via del Politecnico, 00133 Roma, ItalyD. A. FrailNational Radio Astronomy Observatory, PO Box O, Socorro NM 87801, USAS. GeierNordic Optical Telescope, Apartado 474, 38700 Santa Cruz de La Palma, SpainP. GoldoniCommissariat à l'Énergie Atomique et aux Énergies AlternativesO. E. HartoogAstronomical and Anton Pannekoek, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The NetherlandsP. JakobssonCentre for Astrophysics and Cosmology, Science and, University of Iceland, Dunhagi 5, 107 Reykjavík, IcelandH. KorhonenFinnish Centre for Astronomy with ESO (FINCA), University of Turku, Vislntie 20, 21500 Piikki, FinlandK. Y. LeeAlbaNovaB. Milvang‐JensenDark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, DenmarkM. NardiniUniversit degli studi di Milano-Bicocca, Piazza della Scienza 3, 20126 Milano, ItalyA. Nicuesa GuelbenzuThringer Landessternwarte Tautenburg, Sternwarte 5, 07778 Tautenburg, GermanyMasamune OguriKavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU, WPI), University of Tokyo, 277-8583 Chiba, JapanS. B. PandeyAryabhatta Research and of observational-sciences, Manora peak, Nainital 263 129, IndiaG. PetitpasHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USAA. RossiThringer Landessternwarte Tautenburg, Sternwarte 5, 07778 Tautenburg, GermanyAndreas SandbergThe Oskar Klein Centre, Department of Astronomy, Stockholm University, AlbaNova University Centre, 10691 Stockholm, SwedenG. TagliaferriINAF -Osservatorio Astronomico di Brera, via E. Bianchi 46 23807 Merate, ItalyR. P. J. TilanusJames Clerk Maxwell Telescope, Joint Astronomy Centre, 660 North A'ohoku Place, University Park, Hilo, HI 96720, USAJ. M. WintersInstitute de Radioastronomie Millimtrique (IRAM), 300 rue de la Piscine, 38406 Saint Martin d'Hres, FranceD. E. WrightAstrophysics Research Centre, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN, UKEva WuytsDepartment of Astronomy & Astrophysics, The University of Chicago, 5640 S. Ellis Avenue, Chicago, IL 60637, USA
2014en
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ABI
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Context. At low redshift, a handful of gamma-ray bursts (GRBs) have been discovered with luminosities that are substantially lower (L iso < 10 48.5 erg s -1 ) than the average of more distant ones (L iso > 10 49.5 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. Aims. The burst at redshift z = 0.283 from 2012 April 22 is one of the very few examples of intermediate-L GRBs with a -ray luminosity of L iso 10 49.6-49.9 erg s -1 that have been detected up to now. With the robust detection of its accompanying supernova SN 2012bz, it has the potential to answer important questions on the origin of low-and high-L GRBs and the GRB-SN connection. Methods. We carried out a spectroscopy campaign using medium-and low-resolution spectrographs with 6-10-m class telescopes, which covered a time span of 37.3 days, and a multi-wavelength imaging campaign, which ranged from radio to X-ray energies over a duration of 270 days. Furthermore, we used a tuneable filter that is centred at H to map star-formation in the host and the surrounding galaxies. We used these data to extract and model the properties of different radiation components and fitted the spectral energy distribution to extract the properties of the host galaxy.
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