Seven-year Collection of Well-monitored Fermi -LAT Gamma-Ray Burst Afterglows

Panaitescu, Alin-Daniel

doi:10.3847/1538-4357/837/1/13

Title: Seven-year Collection of Well-monitored Fermi -LAT Gamma-Ray Burst Afterglows

Abstract

Here we present the light curves and spectra of 24 afterglows that have been monitored by Fermi-LAT at 0.1–100 GeV over more than a decade. All light curves (except 130427) are consistent with a single power law starting from their peaks, which occur in most cases before the burst end. The light curves display a brightness–decay rate correlation, with all but one (130427) of the bright afterglows decaying faster than the dimmer afterglows. We attribute this dichotomy to the quick deposition of relativistic ejecta energy in the external shock for the brighter/faster-decaying afterglows and to an extended energy injection in the afterglow shock for the dimmer/slower-decaying light curves. The spectra of six afterglows (090328, 100414, 110721, 110731, 130427, 140619B) indicate the existence of a harder component above a spectral dip or ankle at energies of 0.3–3 GeV, offering evidence for inverse-Compton emission at higher energies and suggesting that the harder power-law spectra of five other LAT afterglows (130327B, 131231, 150523, 150627, 160509) could also be inverse-Compton, while the remaining, softer LAT afterglows should be synchrotron emission. Finally, marginal evidence for a spectral break and softening at higher energies is found for two afterglows (090902B and 090926).

Authors:

^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Publication Date:: Mon Feb 27 00:00:00 EST 2017

Research Org.:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Org.:: USDOE; National Aeronautics and Space Administration (NASA)

OSTI Identifier:: 1351224

Report Number(s):: LA-UR-16-23641
Journal ID: ISSN 1538-4357; TRN: US1700681

Grant/Contract Number:: AC52-06NA25396

Resource Type:: Accepted Manuscript

Journal Name:: The Astrophysical Journal (Online)

Additional Journal Information:: Journal Name: The Astrophysical Journal (Online); Journal Volume: 837; Journal Issue: 1; Journal ID: ISSN 1538-4357

Publisher:: Institute of Physics (IOP)

Country of Publication:: United States

Language:: English

Subject:: 79 ASTRONOMY AND ASTROPHYSICS; Astronomy and Astrophysics

Citation Formats


                    Panaitescu, Alin-Daniel. Seven-year Collection of Well-monitored Fermi -LAT Gamma-Ray Burst Afterglows.  United States: N. p., 2017. 
Web.  doi:10.3847/1538-4357/837/1/13.

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                    Panaitescu, Alin-Daniel. Seven-year Collection of Well-monitored Fermi -LAT Gamma-Ray Burst Afterglows.  United States.  https://doi.org/10.3847/1538-4357/837/1/13

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                    Panaitescu, Alin-Daniel. Mon .  
"Seven-year Collection of Well-monitored Fermi -LAT Gamma-Ray Burst Afterglows".  United States.  https://doi.org/10.3847/1538-4357/837/1/13.  https://www.osti.gov/servlets/purl/1351224.

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@article{osti_1351224,

  title        = {Seven-year Collection of Well-monitored Fermi -LAT Gamma-Ray Burst Afterglows},

  author       = {Panaitescu, Alin-Daniel},

  abstractNote = {Here we present the light curves and spectra of 24 afterglows that have been monitored by Fermi-LAT at 0.1–100 GeV over more than a decade. All light curves (except 130427) are consistent with a single power law starting from their peaks, which occur in most cases before the burst end. The light curves display a brightness–decay rate correlation, with all but one (130427) of the bright afterglows decaying faster than the dimmer afterglows. We attribute this dichotomy to the quick deposition of relativistic ejecta energy in the external shock for the brighter/faster-decaying afterglows and to an extended energy injection in the afterglow shock for the dimmer/slower-decaying light curves. The spectra of six afterglows (090328, 100414, 110721, 110731, 130427, 140619B) indicate the existence of a harder component above a spectral dip or ankle at energies of 0.3–3 GeV, offering evidence for inverse-Compton emission at higher energies and suggesting that the harder power-law spectra of five other LAT afterglows (130327B, 131231, 150523, 150627, 160509) could also be inverse-Compton, while the remaining, softer LAT afterglows should be synchrotron emission. Finally, marginal evidence for a spectral break and softening at higher energies is found for two afterglows (090902B and 090926).},

  doi          = {10.3847/1538-4357/837/1/13},

  journal      = {The Astrophysical Journal (Online)},

  number       = 1,

  volume       = 837,

  place        = {United States},

  year         = {Mon Feb 27 00:00:00 EST 2017},

  month        = {Mon Feb 27 00:00:00 EST 2017}

}

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Works referenced in this record:

FERMI OBSERVATIONS OF GRB 090902B: A DISTINCT SPECTRAL COMPONENT IN THE PROMPT AND DELAYED EMISSION
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Abdo, A. A.; Ackermann, M.; Ajello, M.
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Grb110721a: an Extreme peak Energy and Signatures of the Photosphere
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High-Energy Emission of grb 130427a: Evidence for Inverse Compton Radiation
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Fan, Yi-Zhong; Tam, P. H. T.; Zhang, Fu-Wen
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The onset of the GeV afterglow of GRB 090510
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Ghirlanda, G.; Ghisellini, G.; Nava, L.
Astronomy and Astrophysics, Vol. 510
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AGILE DETECTION OF DELAYED GAMMA-RAY EMISSION FROM THE SHORT GAMMA-RAY BURST GRB 090510
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Giuliani, A.; Fuschino, F.; Vianello, G.
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External forward shock origin of high-energy emission for three gamma-ray bursts detected by Fermi: GRB high-energy photons detected by Fermi
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High Energy Emission of grb 130821a: Constraining the Density Profile of the Circum-Burst Medium as well as the Initial Lorentz Factor of the Outflow
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Liang, Yun-Feng; Zhou, Bei; He, Hao-Ning
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GRB 131231A: IMPLICATIONS OF THE GeV EMISSION
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Liu, Bin; Chen, Wei; Liang, Yun-Feng
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Evidence for a Canonical Gamma‐Ray Burst Afterglow Light Curve in the Swift XRT Data
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Swift gamma-ray burst afterglows and the forward-shock model
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Optical Flashes from Internal Pairs Formed in Gamma-Ray Burst Afterglows
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Panaitescu, A.
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Panaitescu, A.; Vestrand, W. T.
Monthly Notices of the Royal Astronomical Society, Vol. 414, Issue 4
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Panaitescu, A.; Vestrand, W. T.
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Peaks of optical and X-ray afterglow light curves
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Works referencing / citing this record:

Bulk Lorentz factors of gamma-ray bursts
journal, January 2018

Ghirlanda, G.; Nappo, F.; Ghisellini, G.
Astronomy & Astrophysics, Vol. 609
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GRB 190114C: from prompt to afterglow?
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Ravasio, M. E.; Oganesyan, G.; Salafia, O. S.
Astronomy & Astrophysics, Vol. 626
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High-Energy Emission from Gamma-Ray Bursts
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Daigne, Frederic
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Multiple Components in the Broadband γ -Ray Emission of the Short GRB 160709A
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Tak, Donggeun; Guiriec, Sylvain; Uhm, Z. Lucas
The Astrophysical Journal, Vol. 876, Issue 1
DOI: 10.3847/1538-4357/ab0e72

Closure Relations of Gamma-Ray Bursts in High Energy Emission
journal, September 2019

Tak, Donggeun; Omodei, Nicola; Lucas Uhm, Z.
The Astrophysical Journal, Vol. 883, Issue 2
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Bulk Lorentz factors of Gamma-Ray Bursts
text, January 2017

Ghirlanda, G.; Nappo, F.; Ghisellini, G.
arXiv
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Title: Seven-year Collection of Well-monitored Fermi -LAT Gamma-Ray Burst Afterglows

Abstract

Citation Formats

FERMI OBSERVATIONS OF GRB 090902B: A DISTINCT SPECTRAL COMPONENT IN THE PROMPT AND DELAYED EMISSION journal, November 2009

Fermi Observations of High-Energy Gamma-Ray Emission from GRB 080916C journal, February 2009

Detection of a Spectral Break in the Extra hard Component of grb 090926a journal, February 2011

THE FIRST FERMI -LAT GAMMA-RAY BURST CATALOG journal, October 2013

MULTIWAVELENGTH OBSERVATIONS OF GRB 110731A: GeV EMISSION FROM ONSET TO AFTERGLOW journal, January 2013

Fermi-LAT Observations of the Gamma-Ray Burst GRB 130427A journal, November 2013

FERMI OBSERVATIONS OF HIGH-ENERGY GAMMA-RAY EMISSION FROM GRB 090217A journal, June 2010

FERMI OBSERVATIONS OF GRB 090510: A SHORT-HARD GAMMA-RAY BURST WITH AN ADDITIONAL, HARD POWER-LAW COMPONENT FROM 10 keV TO GeV ENERGIES journal, May 2010

THE LARGE AREA TELESCOPE ON THE FERMI GAMMA-RAY SPACE TELESCOPE MISSION journal, May 2009

Grb110721a: an Extreme peak Energy and Signatures of the Photosphere journal, September 2012

High-Energy Emission of grb 130427a: Evidence for Inverse Compton Radiation journal, October 2013

The onset of the GeV afterglow of GRB 090510 journal, February 2010

AGILE DETECTION OF DELAYED GAMMA-RAY EMISSION FROM THE SHORT GAMMA-RAY BURST GRB 090510 journal, December 2009

External forward shock origin of high-energy emission for three gamma-ray bursts detected by Fermi: GRB high-energy photons detected by Fermi journal, August 2010

The physics of gamma-ray bursts & relativistic jets journal, February 2015

High Energy Emission of grb 130821a: Constraining the Density Profile of the Circum-Burst Medium as well as the Initial Lorentz Factor of the Outflow journal, January 2014

GRB 131231A: IMPLICATIONS OF THE GeV EMISSION journal, April 2014

Optical and Long‐Wavelength Afterglow from Gamma‐Ray Bursts journal, February 1997

Evidence for a Canonical Gamma‐Ray Burst Afterglow Light Curve in the Swift XRT Data journal, May 2006

Swift gamma-ray burst afterglows and the forward-shock model journal, July 2007

Optical Flashes from Internal Pairs Formed in Gamma-Ray Burst Afterglows journal, June 2015

Taxonomy of gamma-ray burst optical light curves: identification of a salient class of early afterglows journal, June 2008

Optical afterglows of gamma-ray bursts: peaks, plateaus and possibilities: Optical afterglows journal, May 2011

The possible ubiquity of energy injection in gamma-ray burst afterglows: Energy injection in GRB afterglows journal, August 2012

Peaks of optical and X-ray afterglow light curves journal, May 2013

Refreshed Shocks and Afterglow Longevity in Gamma-Ray Bursts journal, March 1998

GRB 090926A AND BRIGHT LATE-TIME FERMI LARGE AREA TELESCOPE GAMMA-RAY BURST AFTERGLOWS journal, June 2010

Discovery of an Extra hard Spectral Component in the High-Energy Afterglow Emission of grb 130427a journal, June 2013

Bulk Lorentz factors of gamma-ray bursts journal, January 2018

GRB 190114C: from prompt to afterglow? journal, June 2019

High-Energy Emission from Gamma-Ray Bursts journal, January 2012

Multiple Components in the Broadband γ -Ray Emission of the Short GRB 160709A journal, May 2019

Closure Relations of Gamma-Ray Bursts in High Energy Emission journal, September 2019

Bulk Lorentz factors of Gamma-Ray Bursts text, January 2017

FERMI OBSERVATIONS OF GRB 090902B: A DISTINCT SPECTRAL COMPONENT IN THE PROMPT AND DELAYED EMISSION
journal, November 2009

Fermi Observations of High-Energy Gamma-Ray Emission from GRB 080916C
journal, February 2009

Detection of a Spectral Break in the Extra hard Component of grb 090926a
journal, February 2011

THE FIRST FERMI -LAT GAMMA-RAY BURST CATALOG
journal, October 2013

MULTIWAVELENGTH OBSERVATIONS OF GRB 110731A: GeV EMISSION FROM ONSET TO AFTERGLOW
journal, January 2013

Fermi-LAT Observations of the Gamma-Ray Burst GRB 130427A
journal, November 2013

FERMI OBSERVATIONS OF HIGH-ENERGY GAMMA-RAY EMISSION FROM GRB 090217A
journal, June 2010

FERMI OBSERVATIONS OF GRB 090510: A SHORT-HARD GAMMA-RAY BURST WITH AN ADDITIONAL, HARD POWER-LAW COMPONENT FROM 10 keV TO GeV ENERGIES
journal, May 2010

THE LARGE AREA TELESCOPE ON THE FERMI GAMMA-RAY SPACE TELESCOPE MISSION
journal, May 2009

Grb110721a: an Extreme peak Energy and Signatures of the Photosphere
journal, September 2012

High-Energy Emission of grb 130427a: Evidence for Inverse Compton Radiation
journal, October 2013

The onset of the GeV afterglow of GRB 090510
journal, February 2010

AGILE DETECTION OF DELAYED GAMMA-RAY EMISSION FROM THE SHORT GAMMA-RAY BURST GRB 090510
journal, December 2009

External forward shock origin of high-energy emission for three gamma-ray bursts detected by Fermi: GRB high-energy photons detected by Fermi
journal, August 2010

The physics of gamma-ray bursts & relativistic jets
journal, February 2015

High Energy Emission of grb 130821a: Constraining the Density Profile of the Circum-Burst Medium as well as the Initial Lorentz Factor of the Outflow
journal, January 2014

GRB 131231A: IMPLICATIONS OF THE GeV EMISSION
journal, April 2014

Optical and Long‐Wavelength Afterglow from Gamma‐Ray Bursts
journal, February 1997

Evidence for a Canonical Gamma‐Ray Burst Afterglow Light Curve in the Swift XRT Data
journal, May 2006

Swift gamma-ray burst afterglows and the forward-shock model
journal, July 2007

Optical Flashes from Internal Pairs Formed in Gamma-Ray Burst Afterglows
journal, June 2015

Taxonomy of gamma-ray burst optical light curves: identification of a salient class of early afterglows
journal, June 2008

Optical afterglows of gamma-ray bursts: peaks, plateaus and possibilities: Optical afterglows
journal, May 2011

The possible ubiquity of energy injection in gamma-ray burst afterglows: Energy injection in GRB afterglows
journal, August 2012

Peaks of optical and X-ray afterglow light curves
journal, May 2013

Refreshed Shocks and Afterglow Longevity in Gamma-Ray Bursts
journal, March 1998

GRB 090926A AND BRIGHT LATE-TIME FERMI LARGE AREA TELESCOPE GAMMA-RAY BURST AFTERGLOWS
journal, June 2010

Discovery of an Extra hard Spectral Component in the High-Energy Afterglow Emission of grb 130427a
journal, June 2013

Bulk Lorentz factors of gamma-ray bursts
journal, January 2018

GRB 190114C: from prompt to afterglow?
journal, June 2019

High-Energy Emission from Gamma-Ray Bursts
journal, January 2012

Multiple Components in the Broadband γ -Ray Emission of the Short GRB 160709A
journal, May 2019

Closure Relations of Gamma-Ray Bursts in High Energy Emission
journal, September 2019

Bulk Lorentz factors of Gamma-Ray Bursts
text, January 2017