Evidence for intrinsic absorption in the Swift X-ray afterglows

S. Campana; P. Romano; S. Covino; D. Lazzati; A. De Luca; G. Chincarini; A. Moretti; G. Tagliaferri; G. Cusumano; P. Giommi; V. Mangano; M. Perri; V. La Parola; M. Capalbi; T. Mineo; L. A. Antonelli; D. N. Burrows; J. E. Hill; J. L. Racusin; J. A. Kennea; D. C. Morris; C. Pagani; J. A. Nousek; J. P. Osborne; M. R. Goad; K. L. Page; A. P. Beardmore; O. Godet; P. T. O'Brien; A. A. Wells; L. Angelini; N. Gehrels

doi:10.1051/0004-6361:20053823

Evidence for intrinsic absorption in the Swift X-ray afterglows

S. Campana, P. Romano, S. Covino, D. Lazzati, A. De Luca, G. Chincarini, A. Moretti, G. Tagliaferri, G. Cusumano, P. Giommi, V. Mangano, M. Perri, V. La Parola, M. Capalbi, T. Mineo, L. A. Antonelli, D. N. Burrows, J. E. Hill, J. L. Racusin, J. A. KenneaD. C. Morris, C. Pagani, J. A. Nousek, J. P. Osborne, M. R. Goad, K. L. Page, A. P. Beardmore, O. Godet, P. T. O'Brien, A. A. Wells, L. Angelini, N. Gehrels

Astronomy & Astrophysics

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Abstract

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.

Original language	English (US)
Pages (from-to)	61-65
Number of pages	5
Journal	Astronomy and Astrophysics
Volume	449
Issue number	1
DOIs	https://doi.org/10.1051/0004-6361:20053823
State	Published - Apr 2006

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.1051/0004-6361:20053823

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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., ... Gehrels, N. (2006). Evidence for intrinsic absorption in the Swift X-ray afterglows. Astronomy and Astrophysics, 449(1), 61-65. https://doi.org/10.1051/0004-6361:20053823

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title = "Evidence for intrinsic absorption in the Swift X-ray afterglows",

abstract = "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.",

author = "S. Campana and P. Romano and S. Covino and D. Lazzati and {De Luca}, A. and G. Chincarini and A. Moretti and G. Tagliaferri and G. Cusumano and P. Giommi and V. Mangano and M. Perri and {La Parola}, V. and M. Capalbi and T. Mineo and Antonelli, {L. A.} and Burrows, {D. N.} and Hill, {J. E.} and Racusin, {J. L.} and Kennea, {J. A.} and Morris, {D. C.} and C. Pagani and Nousek, {J. A.} and Osborne, {J. P.} and Goad, {M. R.} and Page, {K. L.} and Beardmore, {A. P.} and O. Godet and O'Brien, {P. T.} and Wells, {A. A.} and L. Angelini and N. Gehrels",

year = "2006",

month = apr,

doi = "10.1051/0004-6361:20053823",

language = "English (US)",

volume = "449",

pages = "61--65",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

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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, LA, Burrows, DN, Hill, JE, Racusin, JL, Kennea, JA, Morris, DC, Pagani, C, Nousek, JA, Osborne, JP, Goad, MR, Page, KL, Beardmore, AP, Godet, O, O'Brien, PT, Wells, AA, Angelini, L & Gehrels, N 2006, 'Evidence for intrinsic absorption in the Swift X-ray afterglows', Astronomy and Astrophysics, vol. 449, no. 1, pp. 61-65. https://doi.org/10.1051/0004-6361:20053823

TY - JOUR

T1 - Evidence for intrinsic absorption in the Swift X-ray afterglows

AU - Campana, S.

AU - Romano, P.

AU - Covino, S.

AU - Lazzati, D.

AU - De Luca, A.

AU - Chincarini, G.

AU - Moretti, A.

AU - Tagliaferri, G.

AU - Cusumano, G.

AU - Giommi, P.

AU - Mangano, V.

AU - Perri, M.

AU - La Parola, V.

AU - Capalbi, M.

AU - Mineo, T.

AU - Antonelli, L. A.

AU - Burrows, D. N.

AU - Hill, J. E.

AU - Racusin, J. L.

AU - Kennea, J. A.

AU - Morris, D. C.

AU - Pagani, C.

AU - Nousek, J. A.

AU - Osborne, J. P.

AU - Goad, M. R.

AU - Page, K. L.

AU - Beardmore, A. P.

AU - Godet, O.

AU - O'Brien, P. T.

AU - Wells, A. A.

AU - Angelini, L.

AU - Gehrels, N.

PY - 2006/4

Y1 - 2006/4

N2 - 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.

AB - 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.

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UR - http://www.scopus.com/inward/citedby.url?scp=33645663185&partnerID=8YFLogxK

U2 - 10.1051/0004-6361:20053823

DO - 10.1051/0004-6361:20053823

M3 - Article

AN - SCOPUS:33645663185

SN - 0004-6361

VL - 449

SP - 61

EP - 65

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

IS - 1

ER -

Evidence for intrinsic absorption in the Swift X-ray afterglows

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