IPTF14yb: The first discovery of a gamma-ray burst afterglow independent of a high-energy trigger

S. Bradley Cenko, Alex L. Urban, Daniel A. Perley, Assaf Horesh, Alessandra Corsi, Derek B. Fox, Yi Cao, Mansi M. Kasliwal, Amy Lien, Iair Arcavi, Joshua S. Bloom, Nathaniel Butler, Antonino Cucchiara, José A De Diego, Alexei V. Filippenko, Avishay Gal-Yam, Neil Gehrels, Leonid Georgiev, J. Jesús González, John F. GrahamJochen Greiner, D. Alexander Kann, Christopher R. Klein, Fabian Knust, S. R. Kulkarni, Alexander Kutyrev, Russ Laher, William H. Lee, Peter E. Nugent, J. Xavier Prochaska, Enrico Ramirez-Ruiz, Michael G. Richer, Adam Rubin, Yuji Urata, Karla Varela, Alan M. Watson, Przemek R. Wozniak

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

We report here the discovery by the Intermediate Palomar Transient Factory (iPTF) of iPTF14yb, a luminous(Mr ≈ -27.8 mag), cosmological (redshift 1.9733), rapidly fading optical transient. We demonstrate, based onprobabilistic arguments and a comparison with the broader population, that iPTF14yb is the optical afterglow ofthe long-duration gamma-ray burst GRB 140226A. This marks the first unambiguous discovery of a GRBafterglow prior to (and thus entirely independent of) an associated high-energy trigger. We estimate the rate ofiPTF14yb-like sources (i.e., cosmologically distant relativistic explosions) based on iPTF observations, inferringan all-sky value of Rrel = 610 yr?1 (68% confidence interval of 1102000 yr?1). Our derived rate is consistent(within the large uncertainty) with the all-sky rate of on-axis GRBs derived by the Swift satellite. Finally, webriefly discuss the implications of the nondetection to date of bona fide orphan afterglows (i.e., those lackingdetectable high-energy emission) on GRB beaming and the degree of baryon loading in these relativistic jets.

Original languageEnglish (US)
Article numberL24
JournalAstrophysical Journal Letters
Volume803
Issue number2
DOIs
StatePublished - Apr 20 2015

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afterglows
gamma ray bursts
actuators
industrial plants
sky
energy
orphan
fading
confidence interval
explosions
explosion
confidence
baryons
intervals
estimates
rate

Keywords

  • gamma-ray burst: general
  • stars: flare
  • supernovae: general

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Cenko, S. B., Urban, A. L., Perley, D. A., Horesh, A., Corsi, A., Fox, D. B., ... Wozniak, P. R. (2015). IPTF14yb: The first discovery of a gamma-ray burst afterglow independent of a high-energy trigger. Astrophysical Journal Letters, 803(2), [L24]. https://doi.org/10.1088/2041-8205/803/2/L24

IPTF14yb : The first discovery of a gamma-ray burst afterglow independent of a high-energy trigger. / Cenko, S. Bradley; Urban, Alex L.; Perley, Daniel A.; Horesh, Assaf; Corsi, Alessandra; Fox, Derek B.; Cao, Yi; Kasliwal, Mansi M.; Lien, Amy; Arcavi, Iair; Bloom, Joshua S.; Butler, Nathaniel; Cucchiara, Antonino; Diego, José A De; Filippenko, Alexei V.; Gal-Yam, Avishay; Gehrels, Neil; Georgiev, Leonid; González, J. Jesús; Graham, John F.; Greiner, Jochen; Kann, D. Alexander; Klein, Christopher R.; Knust, Fabian; Kulkarni, S. R.; Kutyrev, Alexander; Laher, Russ; Lee, William H.; Nugent, Peter E.; Xavier Prochaska, J.; Ramirez-Ruiz, Enrico; Richer, Michael G.; Rubin, Adam; Urata, Yuji; Varela, Karla; Watson, Alan M.; Wozniak, Przemek R.

In: Astrophysical Journal Letters, Vol. 803, No. 2, L24, 20.04.2015.

Research output: Contribution to journalArticle

Cenko, SB, Urban, AL, Perley, DA, Horesh, A, Corsi, A, Fox, DB, Cao, Y, Kasliwal, MM, Lien, A, Arcavi, I, Bloom, JS, Butler, N, Cucchiara, A, Diego, JAD, Filippenko, AV, Gal-Yam, A, Gehrels, N, Georgiev, L, González, JJ, Graham, JF, Greiner, J, Kann, DA, Klein, CR, Knust, F, Kulkarni, SR, Kutyrev, A, Laher, R, Lee, WH, Nugent, PE, Xavier Prochaska, J, Ramirez-Ruiz, E, Richer, MG, Rubin, A, Urata, Y, Varela, K, Watson, AM & Wozniak, PR 2015, 'IPTF14yb: The first discovery of a gamma-ray burst afterglow independent of a high-energy trigger', Astrophysical Journal Letters, vol. 803, no. 2, L24. https://doi.org/10.1088/2041-8205/803/2/L24
Cenko, S. Bradley ; Urban, Alex L. ; Perley, Daniel A. ; Horesh, Assaf ; Corsi, Alessandra ; Fox, Derek B. ; Cao, Yi ; Kasliwal, Mansi M. ; Lien, Amy ; Arcavi, Iair ; Bloom, Joshua S. ; Butler, Nathaniel ; Cucchiara, Antonino ; Diego, José A De ; Filippenko, Alexei V. ; Gal-Yam, Avishay ; Gehrels, Neil ; Georgiev, Leonid ; González, J. Jesús ; Graham, John F. ; Greiner, Jochen ; Kann, D. Alexander ; Klein, Christopher R. ; Knust, Fabian ; Kulkarni, S. R. ; Kutyrev, Alexander ; Laher, Russ ; Lee, William H. ; Nugent, Peter E. ; Xavier Prochaska, J. ; Ramirez-Ruiz, Enrico ; Richer, Michael G. ; Rubin, Adam ; Urata, Yuji ; Varela, Karla ; Watson, Alan M. ; Wozniak, Przemek R. / IPTF14yb : The first discovery of a gamma-ray burst afterglow independent of a high-energy trigger. In: Astrophysical Journal Letters. 2015 ; Vol. 803, No. 2.
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AU - Urban, Alex L.

AU - Perley, Daniel A.

AU - Horesh, Assaf

AU - Corsi, Alessandra

AU - Fox, Derek B.

AU - Cao, Yi

AU - Kasliwal, Mansi M.

AU - Lien, Amy

AU - Arcavi, Iair

AU - Bloom, Joshua S.

AU - Butler, Nathaniel

AU - Cucchiara, Antonino

AU - Diego, José A De

AU - Filippenko, Alexei V.

AU - Gal-Yam, Avishay

AU - Gehrels, Neil

AU - Georgiev, Leonid

AU - González, J. Jesús

AU - Graham, John F.

AU - Greiner, Jochen

AU - Kann, D. Alexander

AU - Klein, Christopher R.

AU - Knust, Fabian

AU - Kulkarni, S. R.

AU - Kutyrev, Alexander

AU - Laher, Russ

AU - Lee, William H.

AU - Nugent, Peter E.

AU - Xavier Prochaska, J.

AU - Ramirez-Ruiz, Enrico

AU - Richer, Michael G.

AU - Rubin, Adam

AU - Urata, Yuji

AU - Varela, Karla

AU - Watson, Alan M.

AU - Wozniak, Przemek R.

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