A. Kutyrev
A5066446964- Gamma-ray bursts and supernovae
- SAS software applications and methods
- Astronomy and Astrophysical Research
- Astronomical Observations and Instrumentation
- Stellar, planetary, and galactic studies
- Astrophysical Phenomena and Observations
- Astro and Planetary Science
- Calibration and Measurement Techniques
- Adaptive optics and wavefront sensing
- Spectroscopy and Chemometric Analyses
- Superconducting and THz Device Technology
- Astrophysics and Cosmic Phenomena
- Pulsars and Gravitational Waves Research
- Spacecraft Design and Technology
- Advanced MEMS and NEMS Technologies
- CCD and CMOS Imaging Sensors
- Astrophysics and Star Formation Studies
- Planetary Science and Exploration
- Spectroscopy and Laser Applications
- Photocathodes and Microchannel Plates
- Particle Detector Development and Performance
- Atmospheric Ozone and Climate
- Scientific Research and Discoveries
- Galaxies: Formation, Evolution, Phenomena
- Particle Accelerators and Free-Electron Lasers
University of Maryland, College Park
2014-2024
Goddard Space Flight Center
2015-2024
Deleted Institution
2010-2024
Joint Space Science Institute
2024
National Aeronautics and Space Administration
2015-2023
Space Telescope Science Institute
2019
University of California, Santa Cruz
2018
University of Maryland, Baltimore County
2009-2018
University of Mary
2008-2017
Global Science & Technology (United States)
2007
We have gathered optical photometry data from the literature on a large sample of Swift-era gamma-ray burst (GRB) afterglows including GRBs up to September 2009, for total 76 GRBs, and present an additional three pre-Swift not included in earlier sample. Furthermore, we publish 840 new points 42 GRB afterglows, sets 050319, 050408, 050802, 050820A, 050922C, 060418, 080413A 080810. analyzed light curves all derived spectral energy distributions with best quality, allowing us estimate host...
Wide-field optical surveys have begun to uncover large samples of fast (trise ≲ 5 d), luminous (Mpeak < −18), blue transients. While commonly attributed the breakout a supernova shock into dense wind, great distances transients this class found so far hampered detailed investigation their properties. We present photometry and spectroscopy from comprehensive worldwide campaign observe AT 2018cow (ATLAS 18qqn), first fast-luminous transient be in real time at low redshift. Our spectra (<2 days...
Long-duration gamma-ray bursts (GRBs) are powerful cosmic explosions, signaling the death of massive stars. Among them, GRB 221009A is by far brightest burst ever observed. Because its enormous energy (Eiso ≈ 1055 erg) and proximity (z 0.15), an exceptionally rare event that pushes limits our theories. We present multiwavelength observations covering first 3 months afterglow evolution. The x-ray brightness decays as a power law with slope ≈t-1.66, which not consistent standard predictions...
The recent discovery of a faint gamma-ray burst (GRB) coincident with the gravitational wave (GW) event GW 170817 revealed existence population low-luminosity short duration transients produced by neutron star mergers in nearby Universe. These events could be routinely detected existing monitors, yet previous observations failed to identify them without aid triggers. Here we show that GRB150101B was an analogue GRB170817A located at cosmological distance. GRB 150101B characterized bright...
We present imaging and spectroscopy of a hydrogen-poor superluminous supernova (SLSN) discovered by the intermediate Palomar Transient Factory: iPTF13ajg. At redshift z=0.7403, derived from narrow absorption lines, iPTF13ajg peaked at an absolute magnitude M(u,AB)=-22.5, one most luminous supernovae to date. The uBgRiz light curves, obtained with P48, P60, NOT, DCT, Keck telescopes, nine-epoch spectral sequence secured VLT (covering 3 rest-frame months), are tied together photometrically...
We report the results of our observing campaign on GRB140903A, a nearby (z=0.351) short duration (T90~0.3 s) gamma-ray burst discovered by Swift. monitored X-ray afterglow with Chandra up to 21 days after burst, and detected steeper decay flux approximately 1 day. Continued monitoring at optical radio wavelengths showed similar in nearly same time, we interpret it as evidence narrowly collimated jet. By using standard fireball model describe evolution, derive jet opening angle 5 deg...
ABSTRACT A significant fraction (30 per cent) of well-localized short gamma-ray bursts (sGRBs) lack a coincident host galaxy. This leads to two main scenarios: (i) that the progenitor system merged outside visible light its host, or (ii) sGRB resided within faint and distant galaxy was not detected by follow-up observations. Discriminating between these scenarios has important implications for constraining formation channels neutron star mergers, rate environments gravitational wave sources,...
We present optical and near-infrared (NIR) photometry for three gamma-ray burst supernovae (GRB-SNe): GRB 120729A, 130215A / SN 2013ez 130831A 2013fu. In the case of 2013ez, we also spectroscopy at t-t0=16.1 d, which covers rest-frame 3000-6250 Angstroms. Based on Fe II (5169) Si (II) (6355), our spectrum indicates an unusually low expansion velocity 4000-6350 km/s, lowest ever measured a GRB-SN. Additionally, determined brightness shape each accompanying relative to template supernova (SN...
We present the results of a multiwavelength campaign FRB 20201124A, third closest repeating fast radio burst recently localized in nearby (z=0.0978) galaxy. Deep VLA observations led to detection quiescent emission, also marginally visible X-rays with Chandra. Imaging at 22 GHz allowed us resolve source on scale $\gtrsim$ 1 arcsec and locate it position FRB, within an error 0.2 arcsec. EVN e-MERLIN sampled small angular scales, from 2 100 mas, providing tight upper limits presence compact...
Abstract Gamma-ray bursts (GRBs) are fascinating events due to their panchromatic nature. We study optical plateaus in GRB afterglows via an extended search into archival data. comprehensively analyze all published GRBs with known redshifts and observed by many ground-based telescopes (e.g., Subaru Telescope, RATIR) around the world several space-based observatories such as Neil Gehrels Swift Observatory. fit 500 light curves, showing existence of plateau 179 cases. This sample is 75% larger...
Abstract We report observations of the optical counterpart long gamma-ray burst (GRB) GRB 230812B and its associated supernova (SN) SN 2023pel. The proximity ( z = 0.36) high energy E γ ,iso ∼ 10 53 erg) make it an important event to study as a probe connection between massive star core collapse relativistic jet formation. With phenomenological power-law model for afterglow, we find late-time flattening consistent with presence SN. 2023pel has absolute peak r -band magnitude M −19.46 ± 0.18...
The Reionization and Transients InfraRed camera (RATIR) is a simultaneous optical/NIR multi-band imaging which 100% time-dedicated to the followup of Gamma-ray Bursts. mounted on 1.5-meter Johnson telescope Mexican Observatorio Astronomico Nacional Sierra San Pedro Martir in Baja California. With rapid slew capability autonomous interrupt capabilities, system will image GRBs 6 bands (i, r, Z, Y, J, H) within minutes receiving satellite position, detecting optically faint afterglows NIR...
We report here the discovery by Intermediate Palomar Transient Factory (iPTF) of iPTF14yb, a luminous ($M_{r}\approx-27.8$ mag), cosmological (redshift 1.9733), rapidly fading optical transient. demonstrate, based on probabilistic arguments and comparison with broader population, that iPTF14yb is afterglow long-duration gamma-ray burst GRB 140226A. This marks first unambiguous prior to (and thus entirely independent of) an associated high-energy trigger. estimate rate iPTF14yb-like sources...
We present optical and near-infrared light curves spectra of SN 2013dx, associated with the nearby (redshift 0.145) gamma-ray burst GRB 130702A. The prompt isotropic energy released from 130702A is measured to be $E_{\gamma,iso}=6.4_{-1.0}^{+1.3}\times10^{50}$erg (1keV-10MeV in rest frame), placing it intermediate between low-luminosity GRBs like 980425/SN 1998bw broader cosmological population. compare observed $g'r'i'z'$ 2013dx a template, finding that evolves ~20% faster (steeper rise...
We present a detailed multiwavelength analysis of two short gamma-ray bursts (sGRBs) detected by the Neil Gehrels Swift Observatory: GRB 160624A at z = 0.483 and 200522A 0.554.These sGRBs demonstrate very different properties in their observed emission environment.GRB is associated with late-type galaxy an old stellar population (≈3 Gyr) moderate ongoing star formation (≈1 M yr -1 ).Hubble Gemini limits on optical/near-infrared from are among most stringent for sGRBs, leading to tight...
ABSTRACT We present the largest optical photometry compilation of gamma-ray bursts (GRBs) with redshifts (z). include 64813 observations 535 events (including upper limits) from 28 February 1997 to 18 August 2023. also a user-friendly web tool grbLC which allows users visualize photometry, coordinates, redshift, host galaxy extinction, and spectral indices for each event in our database. Furthermore, we have added Gamma-ray Coordinate Network (GCN) scraper that can be used collect data by...
We report the serendipitous discovery of a bright point source flare in Abell cluster 1795 with archival EUVE and Chandra observations. Assuming emission is associated source, X-ray 0.5-7 keV flux declined by factor ~2300 over time span 6 years, following power-law decay index ~2.44+-0.40. The data alone vary ~20. spectrum well fit blackbody constant temperature kT~0.09 (~10^6 K). spatially coincident nuclear region faint, inactive galaxy photometric redshift consistent at one sigma level...
ABSTRACT GRB 210704A is a burst of intermediate duration (T90 ∼ 1–4 s) followed by fading afterglow and an optical excess that peaked about 7 d after the explosion. Its properties, in particular those excess, do not easily fit into well-established classification scheme gamma-ray bursts (GRBs) as being long or short, leaving nature its progenitor uncertain. We present multiwavelength observations counterpart, observed up to 160 burst. In order decipher system, we detailed analysis...
The Reionization And Transients Infra-Red (RATIR) camera is intended for robotic operation on the 1.5-meter Harold Johnson telescope of Observatorio Astronómico Nacional Sierra de San Pedro Mártir, Baja California, Mexico. This paper describes work we have carried out to successfully automate and prepare it RATIR. One novelty our use real-time absolute astrometry from finder telescopes point guide main telescope.