A blast from the infant Universe: The very high-z GRB210905A
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A blast from the infant Universe : The very high-z GRB210905A. / Rossi, A.; Frederiks, D. D.; Kann, D. A.; De Pasquale, M.; Pian, E.; Lamb, G.; D'Avanzo, P.; Izzo, L.; Levan, A. J.; Malesani, D. B.; Melandri, A.; Guelbenzu, A. Nicuesa; Schulze, S.; Strausbaugh, R.; Tanvir, N. R.; Amati, L.; Campana, S.; Cucchiara, A.; Ghirlanda, G.; Della Valle, M.; Klose, S.; Salvaterra, R.; Starling, R. L. C.; Stratta, G.; Tsvetkova, A. E.; Vergani, S. D.; D'Ai, A.; Burgarella, D.; Covino, S.; D'Elia, V.; Postigo, A. de Ugarte; Fausey, H.; Fynbo, J. P. U.; Frontera, F.; Guidorzi, C.; Heintz, K. E.; Masetti, N.; Maiorano, F.; Mundell, C. G.; Oates, S. R.; Page, M. J.; Palazzi, E.; Palmerio, J.; Pugliese, G.; Rau, A.; Saccardi, A.; Sbarufatti, B.; Svinkin, D. S.; Tagliaferri, G.; van der Horst, A. J.; Watson, D. J.; Ulanov, M.; Wiersema, K.; Xu, D.; Zhang, J.
In: Astronomy & Astrophysics, Vol. 665, A125, 21.09.2022.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - A blast from the infant Universe
T2 - The very high-z GRB210905A
AU - Rossi, A.
AU - Frederiks, D. D.
AU - Kann, D. A.
AU - De Pasquale, M.
AU - Pian, E.
AU - Lamb, G.
AU - D'Avanzo, P.
AU - Izzo, L.
AU - Levan, A. J.
AU - Malesani, D. B.
AU - Melandri, A.
AU - Guelbenzu, A. Nicuesa
AU - Schulze, S.
AU - Strausbaugh, R.
AU - Tanvir, N. R.
AU - Amati, L.
AU - Campana, S.
AU - Cucchiara, A.
AU - Ghirlanda, G.
AU - Della Valle, M.
AU - Klose, S.
AU - Salvaterra, R.
AU - Starling, R. L. C.
AU - Stratta, G.
AU - Tsvetkova, A. E.
AU - Vergani, S. D.
AU - D'Ai, A.
AU - Burgarella, D.
AU - Covino, S.
AU - D'Elia, V.
AU - Postigo, A. de Ugarte
AU - Fausey, H.
AU - Fynbo, J. P. U.
AU - Frontera, F.
AU - Guidorzi, C.
AU - Heintz, K. E.
AU - Masetti, N.
AU - Maiorano, F.
AU - Mundell, C. G.
AU - Oates, S. R.
AU - Page, M. J.
AU - Palazzi, E.
AU - Palmerio, J.
AU - Pugliese, G.
AU - Rau, A.
AU - Saccardi, A.
AU - Sbarufatti, B.
AU - Svinkin, D. S.
AU - Tagliaferri, G.
AU - van der Horst, A. J.
AU - Watson, D. J.
AU - Ulanov, M.
AU - Wiersema, K.
AU - Xu, D.
AU - Zhang, J.
PY - 2022/9/21
Y1 - 2022/9/21
N2 - We present a detailed follow-up of the very energetic GRB210905A at a high redshift of z = 6.312 and its luminous X-ray and optical afterglow. Following the detection by Swift and Konus-Wind, we obtained a photometric and spectroscopic follow-up in the optical and near-infrared (NIR), covering both the prompt and afterglow emission from a few minutes up to 20 Ms after burst. With an isotropic gamma-ray energy release of E-iso = 1.27(-0.19)(+0.20) x 10(54) erg, GRB210905A lies in the top similar to 7% of gamma-ray bursts (GRBs) in the Konus-Wind catalogue in terms of energy released. Its afterglow is among the most luminous ever observed, and, in particular, it is one of the most luminous in the optical at t >= 0.5 d in the rest frame. The afterglow starts with a shallow evolution that can be explained by energy injection, and it is followed by a steeper decay, while the spectral energy distribution is in agreement with slow cooling in a constant-density environment within the standard fireball theory. A jet break at similar to 46.2 +/- 16.3 d (6.3 +/- 2.2 d rest-frame) has been observed in the X-ray light curve; however, it is hidden in the H band due to a constant contribution from the host galaxy and potentially from a foreground intervening galaxy. In particular, the host galaxy is only the fourth GRB host at z > 6 known to date. By assuming a number density n = 1 cm(-3) and an efficiency eta = 0.2, we derived a half-opening angle of 8.4 degrees +/- 1.0 degrees, which is the highest ever measured for a z greater than or similar to 6 burst, but within the range covered by closer events. The resulting collimation-corrected gamma-ray energy release of similar or equal to 1 x 10(52) erg is also among the highest ever measured. The moderately large half-opening angle argues against recent claims of an inverse dependence of the half-opening angle on the redshift. The total jet energy is likely too large to be sustained by a standard magnetar, and it suggests that the central engine of this burst was a newly formed black hole. Despite the outstanding energetics and luminosity of both GRB210905A and its afterglow, we demonstrate that they are consistent within 2 sigma with those of less distant bursts, indicating that the powering mechanisms and progenitors do not evolve significantly with redshift.
AB - We present a detailed follow-up of the very energetic GRB210905A at a high redshift of z = 6.312 and its luminous X-ray and optical afterglow. Following the detection by Swift and Konus-Wind, we obtained a photometric and spectroscopic follow-up in the optical and near-infrared (NIR), covering both the prompt and afterglow emission from a few minutes up to 20 Ms after burst. With an isotropic gamma-ray energy release of E-iso = 1.27(-0.19)(+0.20) x 10(54) erg, GRB210905A lies in the top similar to 7% of gamma-ray bursts (GRBs) in the Konus-Wind catalogue in terms of energy released. Its afterglow is among the most luminous ever observed, and, in particular, it is one of the most luminous in the optical at t >= 0.5 d in the rest frame. The afterglow starts with a shallow evolution that can be explained by energy injection, and it is followed by a steeper decay, while the spectral energy distribution is in agreement with slow cooling in a constant-density environment within the standard fireball theory. A jet break at similar to 46.2 +/- 16.3 d (6.3 +/- 2.2 d rest-frame) has been observed in the X-ray light curve; however, it is hidden in the H band due to a constant contribution from the host galaxy and potentially from a foreground intervening galaxy. In particular, the host galaxy is only the fourth GRB host at z > 6 known to date. By assuming a number density n = 1 cm(-3) and an efficiency eta = 0.2, we derived a half-opening angle of 8.4 degrees +/- 1.0 degrees, which is the highest ever measured for a z greater than or similar to 6 burst, but within the range covered by closer events. The resulting collimation-corrected gamma-ray energy release of similar or equal to 1 x 10(52) erg is also among the highest ever measured. The moderately large half-opening angle argues against recent claims of an inverse dependence of the half-opening angle on the redshift. The total jet energy is likely too large to be sustained by a standard magnetar, and it suggests that the central engine of this burst was a newly formed black hole. Despite the outstanding energetics and luminosity of both GRB210905A and its afterglow, we demonstrate that they are consistent within 2 sigma with those of less distant bursts, indicating that the powering mechanisms and progenitors do not evolve significantly with redshift.
KW - gamma-ray burst: general
KW - gamma-ray burst: individual: GRB210905A
KW - GAMMA-RAY BURST
KW - SWIFT/BAT6 COMPLETE SAMPLE
KW - AFTERGLOW LIGHT CURVES
KW - STAR-FORMATION CLUES
KW - JET OPENING ANGLE
KW - GRB HOST GALAXIES
KW - X-RAY
KW - OPTICAL FLASH
KW - PROMPT EMISSION
KW - POPULATION III
U2 - 10.1051/0004-6361/202243225
DO - 10.1051/0004-6361/202243225
M3 - Journal article
VL - 665
JO - Astronomy & Astrophysics
JF - Astronomy & Astrophysics
SN - 0004-6361
M1 - A125
ER -
ID: 322188533