2015A&A...581A..86M


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.13CEST07:29:27

2015A&A...581A..86M - Astronomy and Astrophysics, volume 581A, 86-86 (2015/9-1)

The high-redshift gamma-ray burst GRB 140515A . A comprehensive X-ray and optical study.

MELANDRI A., BERNARDINI M.G., D'AVANZO P., SANCHEZ-RAMIREZ R., NAPPO F., NAVA L., JAPELJ J., DE UGARTE POSTIGO A., OATES S., CAMPANA S., COVINO S., D'ELIA V., GHIRLANDA G., GAFTON E., GHISELLINI G., GNEDIN N., GOLDONI P., GOROSABEL J., LIBBRECHT T., MALESANI D., SALVATERRA R., THOENE C.C., VERGANI S.D., XU D. and TAGLIAFERRI G.

Abstract (from CDS):

High-redshift gamma-ray bursts (GRBs) offer several advantages when studying the distant Universe, providing unique information about the structure and properties of the galaxies in which they exploded. Spectroscopic identification with large ground-based telescopes has improved our knowledge of this kind of distant events. We present the multi-wavelength analysis of the high-z Swift GRB GRB140515A (z=6.327). The best estimate of the neutral hydrogen fraction of the intergalactic medium towards the burst is xHI≤0.002. The spectral absorption lines detected for this event are the weakest lines ever observed in GRB afterglows, suggesting that GRB140515A exploded in a very low-density environment. Its circum-burst medium is characterised by an average extinction (AV∼0.1) that seems to be typical of z≥6 events. The observed multi-band light curves are explained either with a very hard injected spectrum (p=1.7) or with a multi-component emission (p=2.1). In the second case a long-lasting central engine activity is needed in order to explain the late time X-ray emission. The possible origin of GRB140515A in a Pop III (or in a Pop II star with a local environment enriched by Pop III) massive star is unlikely.

Abstract Copyright:

Journal keyword(s): gamma-ray burst: general - gamma-ray burst: individual: GRB 140515A - galaxies: high-redshift - intergalactic medium

Simbad objects: 18

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Number of rows : 18

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9446 1
2 GRB 050904 gB 00 54 50.794 +14 05 09.42           ~ 431 1
3 SN 2011kl SN* 00 57 22.64 -46 48 03.6           SNSLSN 174 1
4 GRB 140304A gB 02 02 33.90 +33 28 27.9           ~ 51 0
5 GRB 130925A gB 02 44 42.38 -26 09 15.8           ~ 114 0
6 GRB 121027A gB 04 14 23.450 -58 49 47.17           ~ 95 0
7 GRB 080913 gB 04 22 57.90 -25 07 38.6           ~ 174 0
8 GRB 131227A gB 04 29 30.78 +28 52 59.2           ~ 21 0
9 GRB 090423 gB 09 55 33.19 +18 08 57.7           ~ 309 0
10 GRB 140515A gB 12 24 15.48 +15 06 17.7           ~ 53 0
11 GRB 090429B gB 14 02 40.10 +32 10 14.6           ~ 121 0
12 GRB 120521C gB 14 17 09.10 +42 08 39.8           ~ 61 0
13 GRB 130606A gB 16 37 35.12 +29 47 46.4           ~ 114 0
14 GRB 050814 gB 17 36 45.390 +46 20 21.60           ~ 134 0
15 GRB 120923A gB 20 15 10.73 +06 13 16.9           ~ 36 0
16 GRB 060522 gB 21 31 44.850 +02 53 10.80           ~ 115 0
17 GRB 060927A gB 21 58 11.930 +05 21 50.32           ~ 173 0
18 GRB 071025 gB 23 40 17.02 +31 46 42.4           ~ 95 0

    Equat.    Gal    SGal    Ecl

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2020.07.13-07:29:27

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