Go long, go deep: finding optical jet breaks for SWIFT-ERA GRBs with the lbt

X. Dai, P. M. Garnavich, J. L. Prieto, K. Z. Stanek, C. S. Kochanek, Jill Bechtold, N. Bouche, P. Buschkamp, E. Diolaiti, Xiaohui Fan, E. Giallongo, R. Gredel, J. M. Hill, L. Jiang, C. McClelland, P. Milne, F. Pedichini, R. W. Pogge, R. Ragazzoni, J. RhoadsR. Smareglia, D. Thompson, R. M. Wagner

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Using the 8.4 m Large Binocular Telescope, we observed six GRB afterglows from 2.8 hr to 30.8 days after the burst triggers to systematically probe the late-time behaviors of afterglows including jet breaks, flares, and supernova bumps. We detected five afterglows with Sloan r′ magnitudes ranging from 23.0 to 26.3 mag. The depth of our observations allows us to extend the temporal baseline for measuring jet breaks by another decade in timescale. We detected two jet breaks and a third candidate, all of which are not detectable without deep, latetime optical observations. In the other three cases, we do not detect the jet breaks either because of contamination from the host galaxy light, the presence of a supernova bump, or the intrinsic faintness of the optical afterglow. This suggests that the basic picture that GRBs are collimated is still valid and that the apparent lack of Swift jet breaks is due to poorly sampled afterglow light curves, particularly at late times.

Original languageEnglish (US)
JournalAstrophysical Journal
Volume682
Issue number2 PART 2
DOIs
StatePublished - 2008

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afterglows
supernovae
flares
light curve
bursts
contamination
actuators
probe
telescopes
galaxies
timescale
probes

Keywords

  • Bursts Online material
  • Color figures
  • Gamma rays

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Dai, X., Garnavich, P. M., Prieto, J. L., Stanek, K. Z., Kochanek, C. S., Bechtold, J., ... Wagner, R. M. (2008). Go long, go deep: finding optical jet breaks for SWIFT-ERA GRBs with the lbt. Astrophysical Journal, 682(2 PART 2). https://doi.org/10.1086/591041

Go long, go deep : finding optical jet breaks for SWIFT-ERA GRBs with the lbt. / Dai, X.; Garnavich, P. M.; Prieto, J. L.; Stanek, K. Z.; Kochanek, C. S.; Bechtold, Jill; Bouche, N.; Buschkamp, P.; Diolaiti, E.; Fan, Xiaohui; Giallongo, E.; Gredel, R.; Hill, J. M.; Jiang, L.; McClelland, C.; Milne, P.; Pedichini, F.; Pogge, R. W.; Ragazzoni, R.; Rhoads, J.; Smareglia, R.; Thompson, D.; Wagner, R. M.

In: Astrophysical Journal, Vol. 682, No. 2 PART 2, 2008.

Research output: Contribution to journalArticle

Dai, X, Garnavich, PM, Prieto, JL, Stanek, KZ, Kochanek, CS, Bechtold, J, Bouche, N, Buschkamp, P, Diolaiti, E, Fan, X, Giallongo, E, Gredel, R, Hill, JM, Jiang, L, McClelland, C, Milne, P, Pedichini, F, Pogge, RW, Ragazzoni, R, Rhoads, J, Smareglia, R, Thompson, D & Wagner, RM 2008, 'Go long, go deep: finding optical jet breaks for SWIFT-ERA GRBs with the lbt', Astrophysical Journal, vol. 682, no. 2 PART 2. https://doi.org/10.1086/591041
Dai, X. ; Garnavich, P. M. ; Prieto, J. L. ; Stanek, K. Z. ; Kochanek, C. S. ; Bechtold, Jill ; Bouche, N. ; Buschkamp, P. ; Diolaiti, E. ; Fan, Xiaohui ; Giallongo, E. ; Gredel, R. ; Hill, J. M. ; Jiang, L. ; McClelland, C. ; Milne, P. ; Pedichini, F. ; Pogge, R. W. ; Ragazzoni, R. ; Rhoads, J. ; Smareglia, R. ; Thompson, D. ; Wagner, R. M. / Go long, go deep : finding optical jet breaks for SWIFT-ERA GRBs with the lbt. In: Astrophysical Journal. 2008 ; Vol. 682, No. 2 PART 2.
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T2 - finding optical jet breaks for SWIFT-ERA GRBs with the lbt

AU - Dai, X.

AU - Garnavich, P. M.

AU - Prieto, J. L.

AU - Stanek, K. Z.

AU - Kochanek, C. S.

AU - Bechtold, Jill

AU - Bouche, N.

AU - Buschkamp, P.

AU - Diolaiti, E.

AU - Fan, Xiaohui

AU - Giallongo, E.

AU - Gredel, R.

AU - Hill, J. M.

AU - Jiang, L.

AU - McClelland, C.

AU - Milne, P.

AU - Pedichini, F.

AU - Pogge, R. W.

AU - Ragazzoni, R.

AU - Rhoads, J.

AU - Smareglia, R.

AU - Thompson, D.

AU - Wagner, R. M.

PY - 2008

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AB - Using the 8.4 m Large Binocular Telescope, we observed six GRB afterglows from 2.8 hr to 30.8 days after the burst triggers to systematically probe the late-time behaviors of afterglows including jet breaks, flares, and supernova bumps. We detected five afterglows with Sloan r′ magnitudes ranging from 23.0 to 26.3 mag. The depth of our observations allows us to extend the temporal baseline for measuring jet breaks by another decade in timescale. We detected two jet breaks and a third candidate, all of which are not detectable without deep, latetime optical observations. In the other three cases, we do not detect the jet breaks either because of contamination from the host galaxy light, the presence of a supernova bump, or the intrinsic faintness of the optical afterglow. This suggests that the basic picture that GRBs are collimated is still valid and that the apparent lack of Swift jet breaks is due to poorly sampled afterglow light curves, particularly at late times.

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