Prompt and Follow-up Multi-wavelength Observations of the GRB 161017A

Sadovnichy, V. A.; Panasyuk, M. I.; Свертилов, С. И.; Lipunov, V.; Bogomolov, V. V.; Gorbovskoy, E.; Bogomolov, A. V.; Castro-Tirado, A. J.; Gabovich, A.; Hu, Y. D.; Iyudin, A. F.; Jeong, Hyeonju; Jeong, S.; Kim, M. B.; Корнилов, В. Г.; Myagkova, I. N.; Park, I. H.; Petrov, V.; Rebolo, R.; Sánchez-Ramírez, R.; Reglero, V.; Соколов, В. В.; Tyurina, N.; Valeev, A. F.; Vlasenko, D.; Yashin, I. V.; Yurkov, V.; Zhang, Bin-Bin

doi:10.3847/1538-4357/aac08e

Cited by 19 publications

(8 citation statements)

References 29 publications

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“…The VWFC enables wide-field coverage in white light (W) with constant sky imaging every 5 s, which is crucial for GRB prompt detections (Gorbovskoy et al 2010;Kornilov et al 2012;Sadovnichy et al 2018). The brightness of the optical afterglow at discovery was W = 10.3 mag and it remained at this brightness for ∼150 s post-burst, thereafter rapidly declining in brightness.…”

Section: Master Photometry Of Grb 191221bmentioning

confidence: 99%

Spectropolarimetry and photometry of the early afterglow of the gamma-ray burst GRB 191221B

Buckley

Bagnulo

Britto

et al. 2021

Monthly Notices of the Royal Astronomical Society

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We report on results of spectropolarimetry of the afterglow of the long gamma-ray burst GRB 191221B, obtained with SALT/RSS and VLT/FORS2, as well as photometry from two telescopes in the MASTER Global Robotic Network, at the MASTER-SAAO (South Africa) and MASTER-OAFA (Argentina) stations. Prompt optical emission was detected by MASTER-SAAO 38 s after the alert, which dimmed from a magnitude (white-light) of ∼10 to 16.2 mag over a period of ∼10 ks, followed by a plateau phase lasting ∼10 ks and then a decline to ∼18 mag after 80 ks. The light curve shows complex structure, with four or five distinct breaks in the power-law decline rate. SALT/RSS linear spectropolarimetry of the afterglow began ∼2.9 h after the burst, during the early part of the plateau phase of the light curve. Absorption lines seen at ∼6010 Å and 5490 Å are identified with the Mg II 2799 Å line from the host galaxy at z = 1.15 and an intervening system located at z = 0.96. The mean linear polarisation measured over 3400 − 8000 Å was ∼1.5% and the mean equatorial position angle (θ) ∼65○. VLT/FORS2 spectropolarimetry was obtained ∼10 h postburst, during a period of slow decline (α = −0.44), and the polarisation was measured to be p = 1.2% and θ = 60○. Two observations with the MeerKAT radio telescope, taken 30 and 444 days after the GRB trigger, detected radio emission from the host galaxy only. We interpret the light curve and polarisation of this long GRB in terms of a slow-cooling forward-shock.

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Section: Master Photometry Of Grb 191221bmentioning

confidence: 99%

Spectropolarimetry and photometry of the early afterglow of the gamma-ray burst GRB 191221B

Buckley

Bagnulo

Britto

et al. 2021

Monthly Notices of the Royal Astronomical Society

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“…MASTER Global Robotic Net was developed to study the key tasks of modern extreme energy astrophysics: to discover optical counterparts of gamma-ray bursts and to discover polarization of GRB prompt optical emission [24][25][26][27][28][29] ; to independently localize the sources of gravitational wave, detected by LIGO/Virgo 12,13 , to investigate high energy neutrino sources 30 , fast radio bursts sources [31][32][33][34] and other extreme processes in Universe. MASTER conducted optical observations that reveal strong evidence for high energy neutrino progenitor 30 .…”

Section: Monitoringmentioning

confidence: 99%

First Prompt Optical Observations of Nearest Fast Radio Burst new New Astromomical Method

Липунов

Корнилов

Gorbovskoy

et al. 2020

Preprint

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With the discovery of gamma ray bursts1,2, it became clear that our Universe flickers with superfast catastrophic events, sometimes lasting for a thousandths of a second. These ultra-fast transients - the peculiar one-day butterflies of the Universe - shine so brightly that they are noticed even on the other end of the Universe and, moreover, by very small telescopes. But in the radio range, the sky remained silent until the beginning of the 21st century. Only in 2007, radio astronomers analyzing archival observations of the Parkes Radio Telescope first encountered fast transients 3,4 . About a hundred such sources have already been discovered. We report the first optical observation of the closest radio burster FRB 180916.J0158+655-8 synchronously with a radio burst. In total, we obtained about 155,093 images at MASTER Global Robotic Net9*. In the course of our observations, we found a new method for detecting objects deep below the noise level. In addition, using the new method, we found the excess of photons in the FRB direction at a level of 23 m associated with the emission of the host galaxy.

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“…and its autodetection system. Eight telescopes with a field of view of 4-8 deg up to 20 mag are distributed on the Earth, designed specially to disco v er and investigate optical counterparts of GRBs(Lipunov et al 2016 ;Sadovnichy et al 2018 ;Ershova et al 2020 ), GWs(Lipunov et al 2017 ), and other high-energy astrophysics sources in large error fields. The automatic strategy (MASTER central planner) of optical follow-up to triggers with large error fields (…”

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confidence: 99%

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

Gupta

Chattopadhyay

et al. 2022

Monthly Notices of the Royal Astronomical Society

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Multi-pulsed GRB 190530A, detected by the GBM and LAT 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 %) 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 %) and the redshift measurement (z= 0.9386) obtained with the 10.4m GTC telescopes. The broadband afterglow can be described with a forward shock model for an ISM-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 γ-ray energy Eγ, iso ∼ 6.05 × 1054 erg, respectively.

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Prompt and Follow-up Multi-wavelength Observations of the GRB 161017A

Cited by 19 publications

References 29 publications

Spectropolarimetry and photometry of the early afterglow of the gamma-ray burst GRB 191221B

Spectropolarimetry and photometry of the early afterglow of the gamma-ray burst GRB 191221B

First Prompt Optical Observations of Nearest Fast Radio Burst new New Astromomical Method

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

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