Multi-wavelength study of the luminous GRB 210619B observed with Fermi and ASIM
| Title: | Multi-wavelength study of the luminous GRB 210619B observed with Fermi and ASIM |
|---|---|
| Authors: | Caballero-García, M. D., Gupta, Rahul, Pandey, S. B., Oates, S. R., Marisaldi, M., Ramsli, A., Hu, Y. -D., Castro-Tirado, A. J., Sánchez-Ramírez, R., Connell, P. H., Christiansen, F., Ror, A. Kumar, Aryan, A., Bai, J. -M., Castro-Tirado, M. A., Fan, Y. -F., Fernández-García, E., Kumar, A., Lindanger, A., Mezentsev, A., Navarro-González, J., Neubert, T., Østgaard, N., Pérez-García, I., Reglero, V., Sarria, D., Sun, T. R., Xiong, D. -R., Yang, J., Yang, Y. -H., Zhang, B. -B. |
| Publication Year: | 2022 |
| Collection: | Astrophysics |
| Subject Terms: | Astrophysics - High Energy Astrophysical Phenomena |
| More Details: | We report on detailed multi-wavelength observations and analysis of the very bright and long GRB 210619B, detected by the Atmosphere-Space Interactions Monitor (ASIM) installed on the International Space Station (ISS) and the Gamma-ray Burst Monitor (GBM) on-board the Fermi mission. Our main goal is to understand the radiation mechanisms and jet composition of GRB 210619B. With a measured redshift of $z$ = 1.937, we find that GRB 210619B falls within the 10 most luminous bursts observed by Fermi so far. The energy-resolved prompt emission light curve of GRB 210619B exhibits an extremely bright hard emission pulse followed by softer/longer emission pulses. The low-energy photon indices ($\alpha_{\rm pt}$) values obtained using the time-resolved spectral analysis of the burst suggest a transition between the thermal (during harder pulse) to non-thermal (during softer pulse) outflow. We examine the correlation between spectral parameters and find that both peak energy and $\alpha_{\rm pt}$ exhibit the flux tracking pattern. The late time broadband photometric dataset can be explained within the framework of the external forward shock model with $\nu_m$ $< \nu_c$ $< \nu_{x}$ (where $\nu_m$, $\nu_c$, and $\nu_{x}$ are the synchrotron peak, cooling-break, and X-ray frequencies, respectively) spectral regime supporting a rarely observed hard electron energy index ($p<$ 2). We find moderate values of host extinction of E(B-V) = 0.14 $\pm$ 0.01 mag for the Small Magellanic Cloud (SMC) extinction law. In addition, we also report late-time optical observations with the 10.4 m GTC placing deep upper limits for the host galaxy ($z$=1.937), favouring a faint, dwarf host for the burst. Comment: 24 pages, 18 figures, 10 tables, accepted for publication in MNRAS |
| Document Type: | Working Paper |
| DOI: | 10.1093/mnras/stac3629 |
| Access URL: | http://arxiv.org/abs/2205.07790 |
| Accession Number: | edsarx.2205.07790 |
| Database: | arXiv |
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A.</searchLink><br /><searchLink fieldCode="AR" term="%22Fan%2C+Y%2E+-F%2E%22">Fan, Y. -F.</searchLink><br /><searchLink fieldCode="AR" term="%22Fernández-García%2C+E%2E%22">Fernández-García, E.</searchLink><br /><searchLink fieldCode="AR" term="%22Kumar%2C+A%2E%22">Kumar, A.</searchLink><br /><searchLink fieldCode="AR" term="%22Lindanger%2C+A%2E%22">Lindanger, A.</searchLink><br /><searchLink fieldCode="AR" term="%22Mezentsev%2C+A%2E%22">Mezentsev, A.</searchLink><br /><searchLink fieldCode="AR" term="%22Navarro-González%2C+J%2E%22">Navarro-González, J.</searchLink><br /><searchLink fieldCode="AR" term="%22Neubert%2C+T%2E%22">Neubert, T.</searchLink><br /><searchLink fieldCode="AR" term="%22Østgaard%2C+N%2E%22">Østgaard, N.</searchLink><br /><searchLink fieldCode="AR" term="%22Pérez-García%2C+I%2E%22">Pérez-García, I.</searchLink><br /><searchLink fieldCode="AR" term="%22Reglero%2C+V%2E%22">Reglero, V.</searchLink><br /><searchLink fieldCode="AR" term="%22Sarria%2C+D%2E%22">Sarria, D.</searchLink><br /><searchLink fieldCode="AR" term="%22Sun%2C+T%2E+R%2E%22">Sun, T. R.</searchLink><br /><searchLink fieldCode="AR" term="%22Xiong%2C+D%2E+-R%2E%22">Xiong, D. -R.</searchLink><br /><searchLink fieldCode="AR" term="%22Yang%2C+J%2E%22">Yang, J.</searchLink><br /><searchLink fieldCode="AR" term="%22Yang%2C+Y%2E+-H%2E%22">Yang, Y. -H.</searchLink><br /><searchLink fieldCode="AR" term="%22Zhang%2C+B%2E+-B%2E%22">Zhang, B. -B.</searchLink> – Name: DatePubCY Label: Publication Year Group: Date Data: 2022 – Name: Subset Label: Collection Group: HoldingsInfo Data: Astrophysics – Name: Subject Label: Subject Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Astrophysics+-+High+Energy+Astrophysical+Phenomena%22">Astrophysics - High Energy Astrophysical Phenomena</searchLink> – Name: Abstract Label: Description Group: Ab Data: We report on detailed multi-wavelength observations and analysis of the very bright and long GRB 210619B, detected by the Atmosphere-Space Interactions Monitor (ASIM) installed on the International Space Station (ISS) and the Gamma-ray Burst Monitor (GBM) on-board the Fermi mission. Our main goal is to understand the radiation mechanisms and jet composition of GRB 210619B. With a measured redshift of $z$ = 1.937, we find that GRB 210619B falls within the 10 most luminous bursts observed by Fermi so far. The energy-resolved prompt emission light curve of GRB 210619B exhibits an extremely bright hard emission pulse followed by softer/longer emission pulses. The low-energy photon indices ($\alpha_{\rm pt}$) values obtained using the time-resolved spectral analysis of the burst suggest a transition between the thermal (during harder pulse) to non-thermal (during softer pulse) outflow. We examine the correlation between spectral parameters and find that both peak energy and $\alpha_{\rm pt}$ exhibit the flux tracking pattern. The late time broadband photometric dataset can be explained within the framework of the external forward shock model with $\nu_m$ $< \nu_c$ $< \nu_{x}$ (where $\nu_m$, $\nu_c$, and $\nu_{x}$ are the synchrotron peak, cooling-break, and X-ray frequencies, respectively) spectral regime supporting a rarely observed hard electron energy index ($p<$ 2). We find moderate values of host extinction of E(B-V) = 0.14 $\pm$ 0.01 mag for the Small Magellanic Cloud (SMC) extinction law. In addition, we also report late-time optical observations with the 10.4 m GTC placing deep upper limits for the host galaxy ($z$=1.937), favouring a faint, dwarf host for the burst.<br />Comment: 24 pages, 18 figures, 10 tables, accepted for publication in MNRAS – Name: TypeDocument Label: Document Type Group: TypDoc Data: Working Paper – Name: DOI Label: DOI Group: ID Data: 10.1093/mnras/stac3629 – Name: URL Label: Access URL Group: URL Data: <link linkTarget="URL" linkTerm="http://arxiv.org/abs/2205.07790" linkWindow="_blank">http://arxiv.org/abs/2205.07790</link> – Name: AN Label: Accession Number Group: ID Data: edsarx.2205.07790 |
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