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Probing into emission mechanisms of GRB 190530A using time-resolved spectra and polarization studies: Synchrotron Origin?

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Probing into emission mechanisms of GRB 190530A using time-resolved spectra and polarization studies: Synchrotron Origin? / Gupta, Rahul; Gupta, S; Chattopadhyay, T et al.
In: Monthly Notices of the Royal Astronomical Society, Vol. 511, No. 2, 30.04.2022, p. 1694-1713.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Gupta, R, Gupta, S, Chattopadhyay, T, Lipunov, V, Castro-Tirado, AJ, Bhattacharya, D, Pandey, SB, Oates, SR, Kumar, A, Hu, Y-D, Valeev, AF, Minaev, PY, Kumar, H, Vinko, J, Dimple, D, Sharma, V, Aryan, A, Castellón, A, Gabovich, A, Moskvitin, A, Ordasi, A, Pál, A, Pozanenko, A, Zhang, B-B, Kumar, B, Svinkin, D, Saraogi, D, Vlasenko, D, Fernández-García, E, Gorbovskoy, E, Anupama, GC, Misra, K, Sárneczky, K, Kriskovics, L, Castro-Tirado, MÁ, Caballero-García, MD, Tiurina, N, Balanutsa, P, Lopez, RR, Sánchez-Ramírez, R, Szakáts, R, Belkin, S, Guziy, S, Iyyani, S, Tiwari, SN, Vadawale, SV, Sun, T, Bhalerao, V, Kornilov, V & Sokolov, VV 2022, 'Probing into emission mechanisms of GRB 190530A using time-resolved spectra and polarization studies: Synchrotron Origin?', Monthly Notices of the Royal Astronomical Society, vol. 511, no. 2, pp. 1694-1713. https://doi.org/10.1093/mnras/stac015

APA

Gupta, R., Gupta, S., Chattopadhyay, T., Lipunov, V., Castro-Tirado, A. J., Bhattacharya, D., Pandey, S. B., Oates, S. R., Kumar, A., Hu, Y.-D., Valeev, A. F., Minaev, P. Y., Kumar, H., Vinko, J., Dimple, D., Sharma, V., Aryan, A., Castellón, A., Gabovich, A., ... Sokolov, V. V. (2022). Probing into emission mechanisms of GRB 190530A using time-resolved spectra and polarization studies: Synchrotron Origin? Monthly Notices of the Royal Astronomical Society, 511(2), 1694-1713. https://doi.org/10.1093/mnras/stac015

Vancouver

Gupta R, Gupta S, Chattopadhyay T, Lipunov V, Castro-Tirado AJ, Bhattacharya D et al. Probing into emission mechanisms of GRB 190530A using time-resolved spectra and polarization studies: Synchrotron Origin? Monthly Notices of the Royal Astronomical Society. 2022 Apr 30;511(2):1694-1713. Epub 2022 Jan 8. doi: 10.1093/mnras/stac015

Author

Gupta, Rahul ; Gupta, S ; Chattopadhyay, T et al. / Probing into emission mechanisms of GRB 190530A using time-resolved spectra and polarization studies : Synchrotron Origin?. In: Monthly Notices of the Royal Astronomical Society. 2022 ; Vol. 511, No. 2. pp. 1694-1713.

Bibtex

@article{ebe7e78e19c1493991ef615c749d7309,
title = "Probing into emission mechanisms of GRB 190530A using time-resolved spectra and polarization studies: Synchrotron Origin?",
abstract = "Multipulsed GRB 190530A, detected by the Gamma-ray Burst Monitor (GBM) and Large Area Telescope onboard Fermi, is the sixth most fluent GBM burst detected so far. This paper presents the timing, spectral, and polarimetric analysis of the prompt emission observed using AstroSat and Fermi to provide insight into the prompt emission radiation mechanisms. The time-integrated spectrum shows conclusive proof of two breaks due to peak energy and a second lower energy break. Time-integrated (55.43 ± 21.30 per cent) as well as time-resolved polarization measurements, made by the Cadmium Zinc Telluride Imager (CZTI) onboard AstroSat, show a hint of high degree of polarization. The presence of a hint of high degree of polarization and the values of low energy spectral index (αpt) do not run over the synchrotron limit for the first two pulses, supporting the synchrotron origin in an ordered magnetic field. However, during the third pulse, αpt exceeds the synchrotron line of death in few bins, and a thermal signature along with the synchrotron component in the time-resolved spectra is observed. Furthermore, we also report the earliest optical observations constraining afterglow polarization using the MASTER (P < 1.3 per cent) and the redshift measurement (z = 0.9386) obtained with the 10.4 m GTC (Gran Telescopio Canarias) telescopes. The broad-band afterglow can be described with a forward shock model for an ISM (interstellar medium)-like medium with a wide jet opening angle. We determine a circumburst density of n0 ∼ 7.41, kinetic energy EK ∼ 7.24 × 1054 erg, and radiated gamma-ray energy Eγ,iso ∼ 6.05 × 1054 erg.",
author = "Rahul Gupta and S Gupta and T Chattopadhyay and V Lipunov and Castro-Tirado, {A J} and D Bhattacharya and Pandey, {S B} and Oates, {S R} and Amit Kumar and Y-D Hu and Valeev, {A F} and Minaev, {P Yu} and H Kumar and J Vinko and Dimple Dimple and V Sharma and A Aryan and A Castell{\'o}n and A Gabovich and A Moskvitin and A Ordasi and A P{\'a}l and A Pozanenko and B-B Zhang and B Kumar and D Svinkin and D Saraogi and D Vlasenko and E Fern{\'a}ndez-Garc{\'i}a and E Gorbovskoy and Anupama, {G C} and K Misra and K S{\'a}rneczky and L Kriskovics and Castro-Tirado, {M {\'A}} and Caballero-Garc{\'i}a, {M D} and N Tiurina and P Balanutsa and Lopez, {R R} and R S{\'a}nchez-Ram{\'i}rez and R Szak{\'a}ts and S Belkin and S Guziy and S Iyyani and Tiwari, {S N} and Vadawale, {Santosh V} and T Sun and V Bhalerao and V Kornilov and Sokolov, {V V}",
year = "2022",
month = apr,
day = "30",
doi = "10.1093/mnras/stac015",
language = "English",
volume = "511",
pages = "1694--1713",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "OXFORD UNIV PRESS",
number = "2",

}

RIS

TY - JOUR

T1 - Probing into emission mechanisms of GRB 190530A using time-resolved spectra and polarization studies

T2 - Synchrotron Origin?

AU - Gupta, Rahul

AU - Gupta, S

AU - Chattopadhyay, T

AU - Lipunov, V

AU - Castro-Tirado, A J

AU - Bhattacharya, D

AU - Pandey, S B

AU - Oates, S R

AU - Kumar, Amit

AU - Hu, Y-D

AU - Valeev, A F

AU - Minaev, P Yu

AU - Kumar, H

AU - Vinko, J

AU - Dimple, Dimple

AU - Sharma, V

AU - Aryan, A

AU - Castellón, A

AU - Gabovich, A

AU - Moskvitin, A

AU - Ordasi, A

AU - Pál, A

AU - Pozanenko, A

AU - Zhang, B-B

AU - Kumar, B

AU - Svinkin, D

AU - Saraogi, D

AU - Vlasenko, D

AU - Fernández-García, E

AU - Gorbovskoy, E

AU - Anupama, G C

AU - Misra, K

AU - Sárneczky, K

AU - Kriskovics, L

AU - Castro-Tirado, M Á

AU - Caballero-García, M D

AU - Tiurina, N

AU - Balanutsa, P

AU - Lopez, R R

AU - Sánchez-Ramírez, R

AU - Szakáts, R

AU - Belkin, S

AU - Guziy, S

AU - Iyyani, S

AU - Tiwari, S N

AU - Vadawale, Santosh V

AU - Sun, T

AU - Bhalerao, V

AU - Kornilov, V

AU - Sokolov, V V

PY - 2022/4/30

Y1 - 2022/4/30

N2 - Multipulsed GRB 190530A, detected by the Gamma-ray Burst Monitor (GBM) and Large Area Telescope onboard Fermi, is the sixth most fluent GBM burst detected so far. This paper presents the timing, spectral, and polarimetric analysis of the prompt emission observed using AstroSat and Fermi to provide insight into the prompt emission radiation mechanisms. The time-integrated spectrum shows conclusive proof of two breaks due to peak energy and a second lower energy break. Time-integrated (55.43 ± 21.30 per cent) as well as time-resolved polarization measurements, made by the Cadmium Zinc Telluride Imager (CZTI) onboard AstroSat, show a hint of high degree of polarization. The presence of a hint of high degree of polarization and the values of low energy spectral index (αpt) do not run over the synchrotron limit for the first two pulses, supporting the synchrotron origin in an ordered magnetic field. However, during the third pulse, αpt exceeds the synchrotron line of death in few bins, and a thermal signature along with the synchrotron component in the time-resolved spectra is observed. Furthermore, we also report the earliest optical observations constraining afterglow polarization using the MASTER (P < 1.3 per cent) and the redshift measurement (z = 0.9386) obtained with the 10.4 m GTC (Gran Telescopio Canarias) telescopes. The broad-band afterglow can be described with a forward shock model for an ISM (interstellar medium)-like medium with a wide jet opening angle. We determine a circumburst density of n0 ∼ 7.41, kinetic energy EK ∼ 7.24 × 1054 erg, and radiated gamma-ray energy Eγ,iso ∼ 6.05 × 1054 erg.

AB - Multipulsed GRB 190530A, detected by the Gamma-ray Burst Monitor (GBM) and Large Area Telescope onboard Fermi, is the sixth most fluent GBM burst detected so far. This paper presents the timing, spectral, and polarimetric analysis of the prompt emission observed using AstroSat and Fermi to provide insight into the prompt emission radiation mechanisms. The time-integrated spectrum shows conclusive proof of two breaks due to peak energy and a second lower energy break. Time-integrated (55.43 ± 21.30 per cent) as well as time-resolved polarization measurements, made by the Cadmium Zinc Telluride Imager (CZTI) onboard AstroSat, show a hint of high degree of polarization. The presence of a hint of high degree of polarization and the values of low energy spectral index (αpt) do not run over the synchrotron limit for the first two pulses, supporting the synchrotron origin in an ordered magnetic field. However, during the third pulse, αpt exceeds the synchrotron line of death in few bins, and a thermal signature along with the synchrotron component in the time-resolved spectra is observed. Furthermore, we also report the earliest optical observations constraining afterglow polarization using the MASTER (P < 1.3 per cent) and the redshift measurement (z = 0.9386) obtained with the 10.4 m GTC (Gran Telescopio Canarias) telescopes. The broad-band afterglow can be described with a forward shock model for an ISM (interstellar medium)-like medium with a wide jet opening angle. We determine a circumburst density of n0 ∼ 7.41, kinetic energy EK ∼ 7.24 × 1054 erg, and radiated gamma-ray energy Eγ,iso ∼ 6.05 × 1054 erg.

U2 - 10.1093/mnras/stac015

DO - 10.1093/mnras/stac015

M3 - Journal article

VL - 511

SP - 1694

EP - 1713

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 2

ER -