Optical and near-infrared follow-up observations of four Fermi/LAT GRBs

Sheila McBreen, T. Krühler, A. Rau, J. Greiner, S. Savaglio, P. Afonso, C. Clemens, R. Filgas, F. E. Olivares, G. Szokoly, A. Yoldas, A. Küpcü Yoldas, D. A. Kann, S. Klose, A. Rossi, A. Updike

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Fermi can measure the spectral properties of gamma-ray bursts over a very large energy range. Localizations by the instruments on Fermi in combination with follow-up by Swift provide accurate positions for observations at longer wavelengths enabling the determination of redshifts, the true energy budget, host galaxy properties and facilitate comparison with pre-Fermi bursts. Multi-wavelength follow-up observations were performed on the afterglows of four bursts with high energy emission detected by Fermi/LAT, GRB 090323, GRB 090328, GRB 090510, GRB 090902B. The observations were obtained in the optical/near-infraredbands with GROND which is mounted at the MPG/ESO 2.2 m telescope, and additional optical observations of GRB 090323 were obtained with the 2 m telescope in Tautenburg, Germany. Further observations of GRB 090328, GRB 090510 and GRB090902B were obtained with the VLT, Chile. Three of the events are classified as long bursts while GRB 090510 is a short GRB. The afterglows of the long bursts exhibit power-law decay indices (α) from less than 1 to ∼2.3 and spectral indices (βopt) values from 0.65 to ∼ 1.2 which are fairly standard for GRB afterglows. Constraints are placed on the jet half opening angles of ≲ 2.1° to ≳ 6.4°, which allows limits to be placed on the beaming corrected energies. These range from ≲ 5 × 1050 erg to the one of the highest values ever recorded, ≳ 2.2 × 1052 erg for GRB 090902B. The extremely energetic long Fermi bursts have optical afterglows which lie in the top half of the brightness distribution of all optical afterglows detected in the Swift era or even in the top 5 % if incompleteness is considered.

Original languageEnglish
Title of host publicationProceedings of Science
Publication statusPublished - 2010
Event8th INTEGRAL Workshop on the Restless Gamma-Ray Universe, INTEGRAL 2010 - Dublin Castle, Dublin, Ireland
Duration: Sep 27 2010Sep 30 2010

Other

Other8th INTEGRAL Workshop on the Restless Gamma-Ray Universe, INTEGRAL 2010
CountryIreland
CityDublin Castle, Dublin
Period9/27/109/30/10

Fingerprint

afterglows
bursts
telescopes
brightness distribution
energy budgets
Chile
European Southern Observatory
Germany
gamma ray bursts
wavelengths
energy
galaxies
decay

ASJC Scopus subject areas

  • General

Cite this

McBreen, S., Krühler, T., Rau, A., Greiner, J., Savaglio, S., Afonso, P., ... Updike, A. (2010). Optical and near-infrared follow-up observations of four Fermi/LAT GRBs. In Proceedings of Science

Optical and near-infrared follow-up observations of four Fermi/LAT GRBs. / McBreen, Sheila; Krühler, T.; Rau, A.; Greiner, J.; Savaglio, S.; Afonso, P.; Clemens, C.; Filgas, R.; Olivares, F. E.; Szokoly, G.; Yoldas, A.; Küpcü Yoldas, A.; Kann, D. A.; Klose, S.; Rossi, A.; Updike, A.

Proceedings of Science. 2010.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

McBreen, S, Krühler, T, Rau, A, Greiner, J, Savaglio, S, Afonso, P, Clemens, C, Filgas, R, Olivares, FE, Szokoly, G, Yoldas, A, Küpcü Yoldas, A, Kann, DA, Klose, S, Rossi, A & Updike, A 2010, Optical and near-infrared follow-up observations of four Fermi/LAT GRBs. in Proceedings of Science. 8th INTEGRAL Workshop on the Restless Gamma-Ray Universe, INTEGRAL 2010, Dublin Castle, Dublin, Ireland, 9/27/10.
McBreen S, Krühler T, Rau A, Greiner J, Savaglio S, Afonso P et al. Optical and near-infrared follow-up observations of four Fermi/LAT GRBs. In Proceedings of Science. 2010
McBreen, Sheila ; Krühler, T. ; Rau, A. ; Greiner, J. ; Savaglio, S. ; Afonso, P. ; Clemens, C. ; Filgas, R. ; Olivares, F. E. ; Szokoly, G. ; Yoldas, A. ; Küpcü Yoldas, A. ; Kann, D. A. ; Klose, S. ; Rossi, A. ; Updike, A. / Optical and near-infrared follow-up observations of four Fermi/LAT GRBs. Proceedings of Science. 2010.
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abstract = "Fermi can measure the spectral properties of gamma-ray bursts over a very large energy range. Localizations by the instruments on Fermi in combination with follow-up by Swift provide accurate positions for observations at longer wavelengths enabling the determination of redshifts, the true energy budget, host galaxy properties and facilitate comparison with pre-Fermi bursts. Multi-wavelength follow-up observations were performed on the afterglows of four bursts with high energy emission detected by Fermi/LAT, GRB 090323, GRB 090328, GRB 090510, GRB 090902B. The observations were obtained in the optical/near-infraredbands with GROND which is mounted at the MPG/ESO 2.2 m telescope, and additional optical observations of GRB 090323 were obtained with the 2 m telescope in Tautenburg, Germany. Further observations of GRB 090328, GRB 090510 and GRB090902B were obtained with the VLT, Chile. Three of the events are classified as long bursts while GRB 090510 is a short GRB. The afterglows of the long bursts exhibit power-law decay indices (α) from less than 1 to ∼2.3 and spectral indices (βopt) values from 0.65 to ∼ 1.2 which are fairly standard for GRB afterglows. Constraints are placed on the jet half opening angles of ≲ 2.1° to ≳ 6.4°, which allows limits to be placed on the beaming corrected energies. These range from ≲ 5 × 1050 erg to the one of the highest values ever recorded, ≳ 2.2 × 1052 erg for GRB 090902B. The extremely energetic long Fermi bursts have optical afterglows which lie in the top half of the brightness distribution of all optical afterglows detected in the Swift era or even in the top 5 {\%} if incompleteness is considered.",
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AU - Krühler, T.

AU - Rau, A.

AU - Greiner, J.

AU - Savaglio, S.

AU - Afonso, P.

AU - Clemens, C.

AU - Filgas, R.

AU - Olivares, F. E.

AU - Szokoly, G.

AU - Yoldas, A.

AU - Küpcü Yoldas, A.

AU - Kann, D. A.

AU - Klose, S.

AU - Rossi, A.

AU - Updike, A.

PY - 2010

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N2 - Fermi can measure the spectral properties of gamma-ray bursts over a very large energy range. Localizations by the instruments on Fermi in combination with follow-up by Swift provide accurate positions for observations at longer wavelengths enabling the determination of redshifts, the true energy budget, host galaxy properties and facilitate comparison with pre-Fermi bursts. Multi-wavelength follow-up observations were performed on the afterglows of four bursts with high energy emission detected by Fermi/LAT, GRB 090323, GRB 090328, GRB 090510, GRB 090902B. The observations were obtained in the optical/near-infraredbands with GROND which is mounted at the MPG/ESO 2.2 m telescope, and additional optical observations of GRB 090323 were obtained with the 2 m telescope in Tautenburg, Germany. Further observations of GRB 090328, GRB 090510 and GRB090902B were obtained with the VLT, Chile. Three of the events are classified as long bursts while GRB 090510 is a short GRB. The afterglows of the long bursts exhibit power-law decay indices (α) from less than 1 to ∼2.3 and spectral indices (βopt) values from 0.65 to ∼ 1.2 which are fairly standard for GRB afterglows. Constraints are placed on the jet half opening angles of ≲ 2.1° to ≳ 6.4°, which allows limits to be placed on the beaming corrected energies. These range from ≲ 5 × 1050 erg to the one of the highest values ever recorded, ≳ 2.2 × 1052 erg for GRB 090902B. The extremely energetic long Fermi bursts have optical afterglows which lie in the top half of the brightness distribution of all optical afterglows detected in the Swift era or even in the top 5 % if incompleteness is considered.

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