iPTF14yb: The First Discovery of a Gamma-Ray Burst Afterglow Independent of a High-Energy Trigger

@article{Cenko2015iPTF14ybTF,
  title={iPTF14yb: The First Discovery of a Gamma-Ray Burst Afterglow Independent of a High-Energy Trigger},
  author={S. Bradley Cenko and Alexander L. Urban and Daniel A. Perley and Assaf Horesh and Alessandra Corsi and Derek B. Fox and Yi Cao and Mansi M. Kasliwal and A. Y. Lien and Iair Arcavi and Joshua S. Bloom and N. R. Butler and A. Cucchiara and Jos'e Antonio de Diego and Alexei V. Filippenko and Avishay Gal-yam and Neil Gehrels and Leonid N. Georgiev and J. J. Gonz{\'a}lez and John F. Graham and J. Greiner and David Alexander Kann and Christopher R. Klein and Fabian Knust and Shrinivas R. Kulkarni and Alexander S. Kutyrev and Russ R. Laher and William H. Lee and Peter E. Nugent and Jason Xavier Prochaska and Enrico Ramirez-Ruiz and Michael G. Richer and Adam Rubin and Yuji Urata and Karla Varela and A. M. Watson and Przemek R. Wozniak},
  journal={The Astrophysical Journal},
  year={2015},
  volume={803}
}
We report here the discovery by the Intermediate Palomar Transient Factory (iPTF) of iPTF14yb, a luminous (M_r ≈ 27.8 mag), cosmological (redshift 1.9733), rapidly fading optical transient. We demonstrate, based on probabilistic arguments and a comparison with the broader population, that iPTF14yb is the optical afterglow of the long-duration gamma-ray burst GRB 140226A. This marks the first unambiguous discovery of a GRB afterglow prior to (and thus entirely independent of) an associated high… 

Figures and Tables from this paper

iPTF17cw: An Engine-driven Supernova Candidate Discovered Independent of a Gamma-Ray Trigger
We present the discovery, classification, and radio-to-X-ray follow-up observations of iPTF17cw, a broad-lined (BL) type Ic supernova (SN) discovered by the intermediate Palomar Transient Factory
iPTF Archival Search for Fast Optical Transients
There has been speculation about a class of relativistic explosions with an initial Lorentz factor Γ_(init) smaller than that of classical gamma-ray bursts (GRBs). These "dirty fireballs" would lack
Gamma-ray bursts and their use as cosmic probes
  • P. Schady
  • Physics
    Royal Society Open Science
  • 2017
TLDR
Some of the milestones made in GRB research during the Swift era are summarized, and how previous widely accepted theoretical models have had to adapt to accommodate the new wealth of observational data are summarized.
Discovery of the Luminous, Decades-long, Extragalactic Radio Transient FIRST J141918.9+394036
We present the discovery of a slowly-evolving, extragalactic radio transient, FIRST J141918.9+394036, identified by comparing a catalog of radio sources in nearby galaxies against new observations
Analysis of broad-lined Type Ic supernovae from the (intermediate) Palomar Transient Factory
We study 34 Type Ic supernovae that have broad spectral features (SNe Ic-BL). This is the only SN type found in association with long-duration gamma-ray bursts (GRBs). We obtained our photometric
A Tale of Two Transients: GW 170104 and GRB 170105A
We present multi-wavelength follow-up campaigns by the AstroSat CZTI and GROWTH collaborations in search of an electromagnetic counterpart to the gravitational wave event GW 170104. At the time of
GRB 170817A as a Refreshed Shock Afterglow Viewed Off-axis
Energy injection into the external shock system that generates the afterglow to a gamma-ray burst (GRB) can result in a re-brightening of the emission. Here we investigate the off-axis view of a
The Unprecedented Properties of the First Electromagnetic Counterpart to a Gravitational Wave Source
We discovered Swope Supernova Survey 2017a (SSS17a) in the LIGO/Virgo Collaboration (LVC) localization volume of GW170817, the first detected binary neutron star (BNS) merger, only 10.9 hours after
The fast, luminous ultraviolet transient AT2018cow: extreme supernova, or disruption of a star by an intermediate-mass black hole?
Wide-field optical surveys have begun to uncover large samples of fast (t_rise 10 days. The spectrum remains extremely hot throughout its evolution, and the photospheric radius contracts with time
The Palomar Transient Factory Sky2Night programme
We present results of the Sky2Night project: a systematic, unbiased search for fast optical transients with the Palomar Transient Factory. We have observed 407deg2 in R-band for eight nights at a
...
...

References

SHOWING 1-10 OF 45 REFERENCES
Discovery of a cosmological, relativistic outburst via its rapidly fading optical emission
We report the discovery by the Palomar Transient Factory (PTF) of the transient source PTF11agg, which is distinguished by three primary characteristics: (1) bright (Rpeak = 18.3mag), rapidly fading
Orphan Afterglows of Collimated Gamma-Ray Bursts: Rate Predictions and Prospects for Detection
We make a quantitative prediction for the detection rate of orphan gamma-ray burst (GRB) afterglows as a function of flux sensitivity in X-ray, optical, and radio wave bands, based on a recent model
Dark Bursts in the Swift Era: The Palomar 60 Inch-Swift Early Optical Afterglow Catalog
We present multicolor optical observations of long-duration γ-ray bursts (GRBs) made over a three-year period with the robotic Palomar 60 inch telescope (P60). Our sample consists of all 29 events
The Swift gamma-ray burst mission
TLDR
The Swift mission will determine the origin of GRB, classify GRBs and search for new types, study the interaction of the ultrarelativistic outflows of GRBs with their surrounding medium, and use GRBs to study the early universe out to z >10.
The nature of "dark" gamma-ray bursts
Context. Thirteen years after the discovery of the first afterglows, the nature of dark gamma-ray bursts (GRB) still eludes explanation: while each long-duration GRB typically has an X-ray afterglow,
THE DETECTABILITY OF ORPHAN AFTERGLOWS
The realization that gamma-ray bursts (GRBs) release a constant amount of energy implies that post-jet-break afterglow evolution is largely universal. For a given redshift, all afterglows should be
A search for untriggered GRB afterglows with ROTSE-III
We present the results of a search for untriggered gamma-ray burst (GRB) afterglows with the Robotic Optical Transient Search Experiment-III (ROTSE-III) telescope array. This search covers
A relativistic type Ibc supernova without a detected γ-ray burst
TLDR
The discovery of luminous radio emission from the seemingly ordinary type Ibc SN 2009bb, which requires a substantial relativistic outflow powered by a central engine, is reported.
The Dynamics and Light Curves of Beamed Gamma-Ray Burst Afterglows
The energy requirements of gamma-ray bursts have in past been poorly constrained because of three major uncertainties: the distances to bursts, the degree of burst beaming, and the efficiency of
Jets in Gamma-Ray Bursts
In the afterglows of several gamma-ray bursts (GRBs), rapid temporal decay, which is inconsistent with spherical (isotropic) blast-wave models, is observed. In particular, GRB 980519 had the most
...
...