ALMA and RATIR observations of GRB131030A

Abstract

We report on the first open-use based Atacama Large Millimeter/submm Array (ALMA) 345-GHz observation for the late afterglow phase of GRB131030A. The ALMA observation constrained a deep limit at 17.1 d for the afterglow and host galaxy. We also identified a faint submillimeter source (ALMAJ2300-0522) near the GRB131030A position. The deep limit at 345 GHz and multifrequency observations obtained using {\it Swift} and RATIR yielded forward shock modeling with a two-dimensional relativistic hydrodynamic jet simulation and described X-ray excess in the afterglow. The excess was inconsistent with the synchrotron self-inverse Compton radiation from the forward shock. The host galaxy of GRB131030A and optical counterpart of ALMAJ2300-0522 were also identified in the SUBARU image. Based on the deep ALMA limit for the host galaxy, the 3-$\sigma$ upper limits of IR luminosity and the star formation rate (SFR) is estimated as $L_{IR}<1.11\times 10^{11}{L}_{\odot }$ and SFR$<18.7$ ($M_{\odot }$~yr${}^{-1}$), respectively. Although the separation angle from the burst location (3.5 arcsec) was rather large, ALMAJ2300-0522 may be one component of the GRB131030A host galaxy, according to previous host galaxy cases.

16 pages, 7 figures, 1 table, PASJ in press

References in corpus (17)

• Astrophysics Source Code Library
• Subaru Deep Survey V. A Census of Lyman Break Galaxies at z=4 and 5 in the Subaru Deep Fields: Photometric Properties
• The UKIRT Wide Field Camera ZYJHK Photometric System: Calibration from 2MASS
• The optically unbiased GRB host (TOUGH) survey. I. Survey design and catalogs
• "Late prompt" emission in Gamma Ray Bursts?
• High Energy Afterglow from Gamma-ray Bursts
• X-ray Hardness Evolution in GRB Afterglows and Flares: Late Time GRB Activity Without N_H Variations
• High-Redshift Starbursting Dwarf Galaxies Revealed by GRB Afterglows
• The optically unbiased GRB host (TOUGH) survey. VI. Radio observations at z<1 and consistency with typical star-forming galaxies
• Faint Submillimeter Galaxies Revealed by Multifield Deep ALMA Observations: Number Counts, Spatial Clustering, and A Dark Submillimeter Line Emitter
• The metal-enriched host of an energetic gamma-ray burst at z ~ 1.6
• Two gamma-ray bursts from dusty regions with little molecular gas
• Multi-color Shallow Decay and Chromatic Breaks in the GRB 050319 Optical Afterglow
• Synchrotron Self-inverse Compton Radiation From Reverse-shock on GRB120326A
• Testing the External Shock Model of Gamma-Ray Bursts using the Late-Time Simultaneous Optical and X-ray Afterglows
• Early-time polarized optical light curve of GRB 131030A
• ALMA Observations of the Host Galaxy of GRB090423 at z=8.23: Deep Limits on Obscured Star Formation 630 Million Years After the Big Bang

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