2025A&A...701A..11V

Query : 2025A&A...701A..11V

2025A&A...701A..11V - Astronomy and Astrophysics, volume 701A11 (2025/9-1)

The GROND gamma-ray burst sample II. Fireball parameters for four gamma-ray burst afterglows.

VARELA K., GREINER J., SCHADY P. and VAN EERTEN H.

Abstract (from CDS):

Afterglows of gamma-ray bursts (GRBs) are, in general, well described by the fireball model. Yet, deducing the full set of model parameters from observations without prior assumptions has been possible for only a handful of GRBs. With GROND, a seven-channel simultaneous optical and near-infrared imager at the 2.2 m telescope of the Max-Planck Society at ESO/La Silla, a dedicated GRB afterglow observing program was conducted between 2007 and 2016. Here, we combine GROND observations of four particularly well-sampled GRBs with public Swift/XRT data as well as sub-millimetre and radio data from both, our own and other groups' programmes, to determine the basic fireball afterglow parameters. We find that all four bursts exploded into a wind environment. We are able to infer the evolution of the magnetic field strength from our data, and we find evidence for its origin through shock amplification of the magnetic field of the circumburst medium.

Abstract Copyright: © The Authors 2025

Journal keyword(s): techniques: photometric - gamma-ray burst: general - gamma-ray burst: individual: GRB 100418A - gamma-ray burst: individual: GRB 110715A - gamma-ray burst: individual: GRB 121024A - gamma-ray burst: individual: GRB 130418A

Simbad objects: 65

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Number of rows : 65
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 GRB 021004 gB 00 26 54.68 +18 55 41.6           ~ 560 0
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
3 GRB 050904 gB 00 54 50.794 +14 05 09.42           ~ 496 0
4 GRB 100901A gB 01 49 03.56 +22 45 30.6           ~ 170 0
5 Fermi bn140304557 gB 02 02 33.90 +33 28 27.9           ~ 106 0
6 GRB 141026A gB 02 56 20.29 +26 55 42.4           ~ 60 0
7 GRB 121024A gB 04 41 53.31 -12 17 26.1           ~ 143 0
8 Fermi bn161001045 gB 04 47 40.84 -57 15 39.9           ~ 41 0
9 GRB 970228 gB 05 01 46.7 +11 46 53           ~ 650 1
10 GRB 991216 gB 05 09 31.2983 +11 17 07.262           ~ 430 0
11 GRB 160131A gB 05 12 40.31 -07 02 59.4           ~ 86 0
12 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
13 GRB 090328 gB 06 02 39.69 -41 52 55.1           ~ 194 1
14 SN 2016jca SN* 06 06 51.36 -26 47 29.7           SNIc 140 0
15 Fermi bn080928628 gB 06 20 16.85 -55 11 59.3           ~ 187 0
16 GRB 970508 gB 06 53 49.2 +79 16 19           ~ 883 1
17 GRB 080129 gB 07 01 08.13 -07 50 47.8           ~ 85 0
18 GRB 980329 gB 07 02 41 +38 50.7           ~ 276 1
19 GRB 070125 gB 07 51 17.80 +31 09 04.8           ~ 188 0
20 GRB 080916C gB 07 59 23.24 -56 38 16.8           ~ 386 0
21 GRB 141121A gB 08 10 40.68 +22 13 02.7           ~ 108 0
22 GRB 980326 gB 08 36 34.3 -18 51 24           ~ 268 0
23 Fermi bn090423330 gB 09 55 33.19 +18 08 57.7           ~ 392 0
24 GRB 130418A gB 09 56 08.86 +13 40 01.8           ~ 70 0
25 SN 2003dh SN* 10 44 50.030 +21 31 18.15     16.2     SNIcpec 1261 1
26 GRB 011211 gB 11 15 16 -21 56.0           ~ 305 0
27 SN 2013cq SN* 11 32 32.84 +27 41 56.2           SNIc 613 1
28 GRB 030226 gB 11 33 04.9 +25 53 56           ~ 212 0
29 GRB 971214 gB 11 56 26.4 +65 12 01           ~ 445 1
30 GRB 000418 gB 12 25 21 +20 05.0           ~ 219 0
31 GRB 050416 gB 12 33 54.600 +21 03 26.69     19.12     ~ 300 1
32 Fermi bn090323002 gB 12 42 50.28 +17 03 11.9           ~ 244 1
33 Fermi bn100414097 gB 12 48 30.0 +08 41 35           ~ 136 0
34 GRB 990510 gB 13 38 07.64 -80 29 48.8           ~ 499 1
35 GRB 140311A gB 13 57 13.29 +00 38 31.7           ~ 86 0
36 GRB 020405 gB 13 58 03.12 -31 22 22.2   21.9 21.5     ~ 259 1
37 GRB 080319B gB 14 31 41.04 +36 18 09.2           ~ 508 0
38 GRB 010222 G 14 52 12.5 +43 01 06           ~ 364 1
39 GRB 990123 gB 15 25 29 +44 45.0     8.95     ~ 1012 1
40 GRB 120404A gB 15 40 02.29 +12 53 06.3           ~ 104 0
41 GRB 060418 gB 15 45 42.600 -03 38 20.00 15.73 16.19 14.98     ~ 389 0
42 GRB 110715A gB 15 50 44.090 -46 14 06.53           ~ 120 0
43 GRB 070521 gB 16 10 38.600 +30 15 22.70           ~ 164 0
44 GRB 000301C gB 16 20 18.5 +29 26 35           ~ 361 0
45 GRB 991208 gB 16 33 53.51 +46 27 21.5           ~ 269 1
46 GRB 000926 gB 17 04 15 +51 46.0           ~ 373 0
47 GRB 100418A gB 17 05 26.96 +11 27 41.9           ~ 198 0
48 Fermi bn090902462 gB 17 39 45.26 +27 19 28.1           ~ 440 0
49 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
50 Fermi bn120326056 gB 18 15 37.06 +69 15 35.4           ~ 188 0
51 Fermi bn110731465 gB 18 42 00.99 -28 32 13.8           ~ 193 0
52 Fermi bn140713780 gB 18 44 25.13 +59 38 00.8           ~ 40 0
53 GRB 110625A gB 19 06 55.85 +06 45 19.2           ~ 69 0
54 GRB 020813A gB 19 46 41.874 -19 36 04.81           ~ 316 0
55 GRB 160625B gB 20 34 23.67 +06 55 11.1           ~ 235 0
56 Fermi bn160509374 gB 20 47 00.90 +76 06 30.1           ~ 141 0
57 GRB 181201A gB 21 17 11.20 -12 37 50.9           ~ 60 0
58 GRB 051221 G 21 54 48.626 +16 53 27.16 19.49         ~ 377 0
59 Fermi bn090510016 G 22 14 12.6230 -26 34 58.550           ~ 548 0
60 GRB 050820A gB 22 29 38.110 +19 33 37.10 18.33 19.00 18.47     ~ 409 0
61 SN 2008hw SN* 22 39 50.39 -40 08 49.1           SNIc 197 1
62 GRB 980519 gB 23 22 21.5 +77 15 43           ~ 203 0
63 Fermi bn090926181 gB 23 33 36.18 -66 19 25.9           ~ 339 0
64 GRB 051022A gB 23 56 04.200 +19 36 32.30           ~ 194 1
65 GRB 980703 gB 23 59 06.7 +08 35 07           ~ 453 1

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