GRB 110715A: Multiwavelength study of the first gamma-ray burst observed with ALMA

GRB 110715A: Multiwavelength study of the first gamma-ray burst observed with ALMA

GRB 110715A had a bright afterglow that was obscured inthe optical by a high Galactic extinction. We discovered the submillimetercounterpart with APEX and followed it in radio with ATCAfor over 2 months. Additional submm observations were performedwith ALMA as a test of the ToO procedures during com...

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Bibliographic Details
Main Authors: Sanchez-Ramirez, R., Hancock, Paul, Murphy, T., de Ugarte Postigo, A., Gorosabel, J., Kann, D., Thöne, C., Lundgren, A., Kamble, A., Oates, S., Fynbo, J., de Gregorio Monsalvo, I., Garcia-Appadoo, D., Martin, S., Kuin, N., Greiner, J., Castro-Tirado, A.
Other Authors: A.J. Castro-Tirado
Format: Conference Paper
Published: European Astronomical Society 2013
Online Access:http://hdl.handle.net/20.500.11937/14602
Description
Summary:GRB 110715A had a bright afterglow that was obscured inthe optical by a high Galactic extinction. We discovered the submillimetercounterpart with APEX and followed it in radio with ATCAfor over 2 months. Additional submm observations were performedwith ALMA as a test of the ToO procedures during commissioning,becoming the first GRB afterglow to be detected by the observatory.UV, optical and NIR observations were performed with Swift/UVOTand 2.2 m/GROND in La Silla and X-ray data were obtained bySwift/XRT. The dataset is complemented with spectroscopic data fromthe VLT/X-shooter spectrograph. The absorption features presentin the intermediate resolution optical/nIR spectra reveal a redshiftof 0.8224 and a host galaxy environment with low ionization. We fit inthe host galaxy absorption features two velocity components separatedby 30 km/s, implying a host galaxy with low dynamical activity.

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