activity
20112026
most citedThe awakening of BL Lacertae: observations by Fermi, Swift, and the GASP-WEBT

135 citations · 449 across the 20 of their papers we have counts for

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Showing astro-ph.HEShow all

15 papers · 1 filter

astro-ph.HE2026

Exploring the multi-wavelength properties of the high energetic event ZTF20abbiixp/GRB 200524A: from prompt emission to afterglow

A. Ghosh, Dimple, K. Misra +32

We conducted a comprehensive multi-wavelength analysis of a high energetic long-duration ZTF20abbiixp / GRB~200524A detected by \textit{Fermi} Gamma Ray Burst Monitor (GBM). Our st…

astro-ph.HE2026

Earliest simultaneous multi-color optical observations of GRB 230328B: from 41 seconds to the host-galaxy identification

T. Komesh, A. Pozanenko, N. Pankov +36

We present a multiwavelength study of the long-duration gamma-ray burst GRB 230328B, combining prompt gamma-ray observations with exceptionally early simultaneous optical photometr…

astro-ph.HE2026★ 2 cited

First detection of VHE gamma-ray signal from the FSRQ TON 0599

MAGIC Collaboration, K. Abe, S. Abe +245

TON\,0599 (z=0.7247) belongs to the few flat spectrum radio quasars (FSRQs) detected in the very high energy (VHE, \,GeV) gamma-ray band. Its redshift makes it currently o…

astro-ph.HE2025★ 3 cited

Multiband optical variability on diverse timescales of the blazar Ton 599 from 2011 to 2023

O. Vince, C. M. Raiteri, M. Villata +72

(Shortened)Context: We analyze the optical variability of the FSRQ Ton 599 using BVRI photometry from the WEBT collaboration (2011-2023), complemented by photometric and spectrosco…

astro-ph.HE2025

Optical and Near-infrared Observations of SN 2023ixf for over 600 days after the Explosion

Gaici Li, Xiaofeng Wang, Yi Yang +37

Context.We present a comprehensive photometric and spectroscopic study of the nearby Type II supernova (SN) 2023ixf, with our extensive observations spanning the phases from ~3 to…

astro-ph.HE2024★ 15 cited

A wiggling filamentary jet at the origin of the blazar multi-wavelength behaviour

C. M. Raiteri, M. Villata, M. I. Carnerero +96

Blazars are beamed active galactic nuclei known for their strong multi-wavelength variability on timescales from years down to minutes. We aim to investigate the suitability of the…

astro-ph.HE2024★ 30 cited

A fast X-ray transient from a weak relativistic jet associated with a type Ic-BL supernova

H. Sun, W. -X. Li, L. -D. Liu +163

Massive stars end their lives as core-collapse supernovae, amongst which some extremes are broad-lined type Ic supernovae from Wolf-Rayet stars associated with long-duration gamma-…

astro-ph.HE2024★ 9 cited

The variability patterns of the TeV blazar PG 1553+113 from a decade of MAGIC and multi-band observations

MAGIC Collaboration, H. Abe, S. Abe +264

PG 1553+113 is one of the few blazars with a convincing quasi-periodic emission in the gamma-ray band. The source is also a very high-energy (VHE; >100 GeV) gamma-ray emitter. To b…

astro-ph.HE2023★ 1 cited

Ready for O4 II: GRANDMA Observations of Swift GRBs during eight-weeks of Spring 2022

I. Tosta e Melo, J. -G. Ducoin, Z. Vidadi +106

We present a campaign designed to train the GRANDMA network and its infrastructure to follow up on transient alerts and detect their early afterglows. In preparation for O4 II camp…

astro-ph.HE2023

Extreme photometric and polarimetric variability of blazar S4 0954+65 at its maximum optical and -ray brightness levels

C. M. Raiteri, M. Villata, M. I. Carnerero +64

In 2022 the BL Lac object S4 0954+65 underwent a major variability phase, reaching its historical maximum brightness in the optical and -ray bands. We present optical photometri…

astro-ph.HE2023★ 1 cited

GRANDMA and HXMT Observations of GRB 221009A -- the Standard-Luminosity Afterglow of a Hyper-Luminous Gamma-Ray Burst

D. A. Kann, S. Agayeva, V. Aivazyan +113

GRB 221009A is the brightest Gamma-Ray Burst (GRB) detected in more than 50 years of study. In this paper, we present observations in the X-ray and optical domains after the GRB ob…

astro-ph.HE2020★ 52 cited

The dual nature of blazar fast variability. Space and ground observations of S5 0716+714

C. M. Raiteri, M. Villata, D. Carosati +39

Blazar S5 0716+714 is well-known for its short-term variability, down to intra-day time-scales. We here present the 2-min cadence optical light curve obtained by the TESS space tel…

astro-ph.HE2016★ 46 cited

Multicolour modelling of SN 2013dx associated with GRB 130702A

A. A. Volnova, M. V. Pruzhinskaya, A. S. Pozanenko +13

We present optical observations of SN 2013dx, related to the Fermi burst GRB 130702A occurred at a redshift z = 0.145. It is the second-best sampled GRB-SN after SN~1998bw: the obs…

astro-ph.HE2016★ 30 cited

Synchrotron emission from the blazar PG 1553+113. An analysis of its flux and polarization variability

C. M. Raiteri, F. Nicastro, A. Stamerra +4

In 2015 July 29 - September 1 the satellite XMM-Newton pointed at the BL Lac object PG 1553+133 six times, collecting data for 218 hours. During one of these epochs, simultaneous o…

astro-ph.HE2013★ 135 cited

The awakening of BL Lacertae: observations by Fermi, Swift, and the GASP-WEBT

C. M. Raiteri, M. Villata, F. D'Ammando +4

Since the launch of the Fermi satellite, BL Lacertae has been moderately active at gamma-rays and optical frequencies until May 2011, when the source started a series of strong fla…