2006A&A...449...61C

Query : 2006A&A...449...61C

2006A&A...449...61C - Astronomy and Astrophysics, volume 449, 61-65 (2006/4-1)

Evidence for intrinsic absorption in the Swift X-ray afterglows.

CAMPANA S., ROMANO P., COVINO S., LAZZATI D., DE LUCA A., CHINCARINI G., MORETTI A., TAGLIAFERRI G., CUSUMANO G., GIOMMI P., MANGANO V., PERRI M., LA PAROLA V., CAPALBI M., MINEO T., ANTONELLI L.A., BURROWS D.N., HILL J.E., RACUSIN J.L., KENNEA J.A., MORRIS D.C., PAGANI C., NOUSEK J.A., OSBORNE J.P., GOAD M.R., PAGE K.L., BEARDMORE A.P., GODET O., O'BRIEN P.T., WELLS A.A., ANGELINI L. and GEHRELS N.

Abstract (from CDS):

Gamma-ray burst (GRB) progenitors are observationally linked to the death of massive stars. X-ray studies of the GRB afterglows can deepen our knowledge of the ionization status and metal abundances of the matter in the GRB environment. Moreover, the presence of local matter can be inferred through its fingerprints in the X-ray spectrum, i.e. the presence of absorption higher than the Galactic value. A few studies based on BeppoSAX and XMM-Newton found evidence of higher than Galactic values for the column density in a number of GRB afterglows. Here we report on a systematic analysis of 17 GRBs observed by Swift up to April 15, 2005. We observed a large number of GRBs with an excess of column density. Our sample, together with previous determinations of the intrinsic column densities for GRBs with known redshift, provides evidence for a distribution of absorption consistent with that predicted for randomly occurring GRB within molecular clouds.

Abstract Copyright: ∼

Journal keyword(s): gamma rays: bursts - X-rays: general

CDS comments: Paragraph 1. GRB 980506 is a probable misprint for GRB 780506

Simbad objects: 38

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Number of rows : 38
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 GRB 021004 gB 00 26 54.68 +18 55 41.6           ~ 547 0
2 GRB 050326 gB 00 27 49.110 -71 22 16.40   20.55       ~ 59 0
3 GRB 000210 gB 01 59 15 -40 40.0           ~ 172 0
4 GRB 050406 gB 02 17 52.200 -50 11 15.81     18.83     ~ 122 0
5 GRB 050318 gB 03 18 51.000 -46 23 43.61 18.10 18.68 17.58     ~ 178 0
6 GRB 030227 gB 04 57 32.2 +20 29 54           ~ 74 0
7 GRB 050219B gB 05 25 15.990 -57 45 28.70   21.38 20.40     ~ 56 0
8 GRB 050410 gB 05 59 13.460 +79 36 12.00           ~ 50 0
9 GRB 041223 gB 06 40 47.39 -37 04 22.6           ~ 43 0
10 GRB 980329 gB 07 02 41 +38 50.7           ~ 273 1
11 GRB 780506 gB 07 42 48 -41 51.3           ~ 10 0
12 GRB 001025 gB 08 36.6 -13 04           ~ 47 1
13 GRB 050319 gB 10 16 47.900 +43 32 53.80   18.02 17.01     ~ 258 0
14 GRB 050219A gB 11 05 38.990 -40 41 03.00           ~ 90 0
15 GRB 011211 gB 11 15 16 -21 56.0           ~ 299 0
16 GRB 030226 gB 11 33 04.9 +25 53 56           ~ 204 0
17 GRB 050215B gB 11 37 48.030 +40 47 43.39           ~ 70 0
18 GRB 050408 gB 12 02 17.320 +10 51 10.00           ~ 151 0
19 GRB 050412 gB 12 04 25.060 -01 12 03.60           ~ 83 0
20 GRB 030328 gB 12 10 48.4 -09 20 51           ~ 144 0
21 GRB 050124 gB 12 51 30.560 +13 02 39.50           ~ 61 0
22 GRB 990510 gB 13 38 07.64 -80 29 48.8           ~ 488 1
23 GRB 020405 gB 13 58 03.12 -31 22 22.2   21.9 21.5     ~ 249 1
24 GRB 050730 gB 14 08 17.090 -03 46 18.90   20.32 17.68     ~ 313 0
25 GRB 050128 gB 14 38 17.750 -34 45 55.61           ~ 66 0
26 GRB 010222 G 14 52 12.5 +43 01 06           ~ 355 1
27 GRB 990123 gB 15 25 29 +44 45.0     8.95     ~ 989 1
28 GRB 050401 gB 16 31 28.84 +02 11 14.5           ~ 335 0
29 GRB 000926 gB 17 04 15 +51 46.0           ~ 364 0
30 GRB 020322 gB 18 00 48.5 +81 06 13           ~ 44 0
31 GRB 050223 gB 18 05 32.200 -62 28 20.40           ~ 106 0
32 GRB 050126 gB 18 32 27.22 +42 22 14.2           ~ 124 0
33 GRB 050306 gB 18 49 13.950 -09 09 08.60     19.16     ~ 54 0
34 GRB 000214 gB 18 54 27.0 -66 27 30           ~ 90 0
35 GRB 020813A gB 19 46 41.874 -19 36 04.81           ~ 303 0
36 GRB 050315 gB 20 25 54.100 -42 36 02.19           ~ 215 0
37 GRB 050117A gB 23 53 47.24 +65 56 00.2           ~ 64 0
38 GRB 980703 gB 23 59 06.7 +08 35 07           ~ 445 1

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