A. S. Fruchter

Space Telescope Science Institute

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Co-Authors

A. J. Levan

University of Warwick

N. R. Tanvir

University of Leicester

P. Jakobsson

University of Iceland

P. T. O’Brien

University of Leicester

J. P. U. Fynbo

University of Copenhagen

J. Hjorth

University of Copenhagen

C. Kouveliotou

George Washington University

D. A. Perley

Liverpool John Moores University

K. Wiersema

University of Washington

R. A. M. J. Wijers

University of Amsterdam

Cooperative Institutions

National Institute for Astrophysics

122

Centre National de la Recherche Scientifique

107

University of California, Berkeley

Lawrence Berkeley National Laboratory

Max Planck Institute for Physics

Goddard Space Flight Center

Universitat de Barcelona

California Institute of Technology

The University of Tokyo

Institut d'Estudis Espacials de Catalunya

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A photometric redshift of z = 6.39 ± 0.12 for GRB 050904

Nature (2006)

J. Haislip M. Nysewander D. Reichart A. J. Levan N. R. Tanvir

Photometric redshift

10.1038/nature04552

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Citations (111)

Investigating Murder in the Galaxy: Theory and Prediction for the Eclipsing Pulsar 1957+20

Bulletin of the American Astronomical Society (1988)

A. S. Fruchter

Source

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Citations (0)

GRB 161219B/SN 2016jca: a powerful stellar collapse

Monthly Notices of the Royal Astronomical Society (2019)

C. Ashall P. A. Mazzali E. Pian S. E. Woosley E. Palazzi

We report observations and analysis of the nearby gamma-ray burst GRB\,161219B (redshift $z=0.1475$) and the associated Type Ic supernova (SN) 2016jca. GRB\,161219B had an isotropic gamma-ray energy of $\sim 1.6 \times 10^{50}$\,erg. Its afterglow is likely refreshed at an epoch preceding the first photometric points (0.6\,d), which slows down the decay rates. Combined analysis of the SN light curve and multiwavelength observations of the afterglow suggest that the GRB jet was broad during the afterglow phase (full opening angle $\sim 42^\circ \pm 3^\circ$). Our spectral series shows broad absorption lines typical of GRB supernovae (SNe), which testify to the presence of material with velocities up to $\sim 0.25$c. The spectrum at 3.73\,d allows for the very early identification of a SN associated with a GRB. Reproducing it requires a large photospheric velocity ($35,000 \pm 7000$\,\kms). The kinetic energy of the SN is estimated through models to be \KE $\approx 4 \times 10^{52}$\,erg in spherical symmetry. The ejected mass in the explosion was \Mej $\approx 6.5 \pm 1.5$\,\Msun, much less than that of other GRB-SNe, demonstrating diversity among these events. The total amount of \Nifs\ in the explosion was $0.27 \pm 0.05$\,\Msun. The observed spectra require the presence of freshly synthesised \Nifs\ at the highest velocities, at least 3 times more than a standard GRB-SN. We also find evidence for a decreasing \Nifs\ abundance as a function of decreasing velocity. This suggests that SN\,2016jca was a highly aspherical explosion viewed close to on-axis, powered by a compact remnant. Applying a typical correction for asymmetry, the energy of SN\,2016jca was $\sim$ (1--3) $\times 10^{52}$\,erg, confirming that most of the energy produced by GRB-SNe goes into the kinetic energy of the SN ejecta.

10.1093/mnras/stz1588

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Citations (57)

New candidates for magnetar counterparts from a deep search with theHubble Space Telescope

Monthly Notices of the Royal Astronomical Society (2022)

A A Chrimes A. J. Levan A. S. Fruchter P. Groot C. Kouveliotou

We report the discovery of six new magnetar counterpart candidates from deep near-infrared Hubble Space Telescope imaging. The new candidates are among a sample of nineteen magnetars for which we present HST data obtained between 2018-2020. We confirm the variability of previously established near-infrared counterparts, and newly identify candidates for PSRJ1622-4950, SwiftJ1822.3-1606, CXOUJ171405.7-381031, SwiftJ1833-0832, SwiftJ1834.9-0846 and AXJ1818.8-1559 based on their proximity to X-ray localisations. The new candidates are compared with the existing counterpart population in terms of their colours, magnitudes, and near-infrared to X-ray spectral indices. We find two candidates for AXJ1818.8-1559 which are both consistent with previously established counterparts. The other new candidates are likely to be chance alignments, or otherwise have a different origin for their near-infrared emission not previously seen in magnetar counterparts. Further observations and studies of these candidates are needed to firmly establish their nature.

Magnetar

Spitzer Space Telescope

10.1093/mnras/stac870

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Citations (6)

A new constraint for gamma-ray burst progenitor mass

Monthly Notices of the Royal Astronomical Society (2007)

Josefin Larsson A. J. Levan M. B. Davies A. S. Fruchter

Recent comparative observations of long duration gamma-ray bursts (LGRBs) and core collapse supernovae (cc SN) host galaxies demonstrate that these two, highly energetic transient events are distributed very differently upon their hosts. LGRBs are much more concentrated on their host galaxy light than cc SN. Here we explore the suggestion that this differing distribution reflects different progenitor masses for LGRBs and cc SN. Using a simple model we show that, assuming cc SN arise from stars with main sequence masses $>$8 M$_{\odot}$, GRBs are likely to arise from stars with initial masses $>$ 20 M$_{\odot}$. This difference can naturally be explained by the requirement that stars which create a LGRB must also create a black hole.

10.1111/j.1365-2966.2007.11523.x

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Citations (25)

Correction to: Comparing emission- and absorption-based gas-phase metallicities in GRB host galaxies at z = 2−4 using JWST

Monthly Notices of the Royal Astronomical Society (2024)

P. Schady Robert M. Yates L. Christensen A. De A. Rossi

10.1093/mnras/stae1037

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Citations (0)

An eclipsing millisecond pulsar in the globular cluster Terzan 5

Nature (1990)

A. G. Lyne R. N. Manchester N. D’Amico L. Staveley‐Smith S. Johnston

Orbital period

Eclipse

Pulsar planet

X-ray pulsar

Orbital elements

10.1038/347650a0

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Citations (135)

X-rays from the eclipsing pulsar 1957 +20

Nature (1992)

A. S. Fruchter Jay A. Bookbinder M. R. Garcia C. D. Bailyn

Pulsar wind nebula

Pulsar planet

X-ray pulsar

Orbital period

10.1038/359303a0

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Citations (15)

A very energetic supernova associated with the γ-ray burst of 29 March 2003

Nature (2003)

J. Hjorth J. Sollerman P. Møller J. P. U. Fynbo S. E. Woosley

Hypernova

10.1038/nature01750

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Citations (1,295)

The host galaxies of core-collapse supernovae and gamma-ray bursts

Monthly Notices of the Royal Astronomical Society (2010)

K. M. Svensson A. J. Levan N. R. Tanvir A. S. Fruchter Louis-Gregory Strolger

We present a comparative study of the galactic and small scale environments of gamma-ray bursts (GRB) and core collapse supernovae (CCSN). We use a sample of 34 GRB hosts at z<1.2, and a comparison sample of 58 supernova hosts located within the Great Observatories Origins Deep Survey footprint. We fit template spectra to the available photometric data, which span the range 0.45-24 micron, and extract absolute magnitudes, stellar masses and star formation rates from the resulting fits. Our results broadly corroborate previous findings, but offer significant enhancements in spectral coverage and a factor 2-3 increase in sample size. Specifically, we find that CCSN occur frequently in massive spirals (spiral fraction ~50%). In contrast GRBs occur in small, relatively low mass galaxies with high specific and surface star formation rates, and have a spiral fraction of only ~10%. A comparison of the rest frame absolute magnitudes of the GRB and CCSN sample is less conclusive than found in previous work, suggesting that while GRB hosts are typically both smaller and bluer than those of CCSN their total blue light luminosities are only slightly lower. We suggest this is likely due to rapid periods of intensified star formation activity, as indicated by the high specific star formation rates, which both create the GRB progenitors and briefly significantly enhance the host galaxy blue luminosity. Finally, our analysis of local environments of GRBs and CCSN shows that GRBs are highly concentrated on their host light, and further occur in regions of higher absolute surface luminosity than CCSN.

Absolute magnitude

Stellar mass

10.1111/j.1365-2966.2010.16442.x

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Citations (162)