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Calet Upper Limits On X-Ray And Gamma-Ray Counterparts Of Gw151226, O. Adriani, Y. Akaike, K. Asano, Y. Asaoka, M. G. Bagliesi, G. Bigongiari, W. R. Binns, S. Bonechi, M. Bongi, P. Brogi, J. H. Buckley, N. Cannady, G. Castellini, C. Checchia, M. L. Cherry, G. Collazuol, V. Di Felice, K. Ebisawa, H. Fuke, T. G. Guzik, T. Hams, M. Hareyama, N. Hasebe, K. Hibino, M. Ichimura, K. Ioka, W. Ishizaki, M. H. Israel, A. Javaid, K. Kasahara, J. Kataoka, R. Kataoka, Y. Katayose
Calet Upper Limits On X-Ray And Gamma-Ray Counterparts Of Gw151226, O. Adriani, Y. Akaike, K. Asano, Y. Asaoka, M. G. Bagliesi, G. Bigongiari, W. R. Binns, S. Bonechi, M. Bongi, P. Brogi, J. H. Buckley, N. Cannady, G. Castellini, C. Checchia, M. L. Cherry, G. Collazuol, V. Di Felice, K. Ebisawa, H. Fuke, T. G. Guzik, T. Hams, M. Hareyama, N. Hasebe, K. Hibino, M. Ichimura, K. Ioka, W. Ishizaki, M. H. Israel, A. Javaid, K. Kasahara, J. Kataoka, R. Kataoka, Y. Katayose
Faculty Publications
We present upper limits in the hard X-ray and gamma-ray bands at the time of the Laser Interferometer Gravitational-wave Observatory (LIGO) gravitational-wave event GW151226 derived from the CALorimetric Electron Telescope (CALET) observation. The main instrument of CALET, CALorimeter (CAL), observes gamma-rays from ∼1 GeV up to 10 TeV with a field of view of ∼2 sr. The CALET gamma-ray burst monitor (CGBM) views ∼3 sr and ∼2π sr of the sky in the 7 keV-1 MeV and the 40 keV-20 MeV bands, respectively, by using two different scintillator-based instruments. The CGBM covered 32.5% and 49.1% of the GW151226 sky localization …
Gravitational-Wave Observations May Constrain Gamma-Ray Burst Models: The Case Of Gw150914-Gbm, P. Veres, R. D. Preece, A. Goldstein, P. Mészáros, E. Burns, V. Connaughton
Gravitational-Wave Observations May Constrain Gamma-Ray Burst Models: The Case Of Gw150914-Gbm, P. Veres, R. D. Preece, A. Goldstein, P. Mészáros, E. Burns, V. Connaughton
Faculty Publications
The possible short gamma-ray burst (GRB) observed by Fermi/GBM in coincidence with the first gravitational-wave (GW) detection offers new ways to test GRB prompt emission models. GW observations provide previously inaccessible physical parameters for the black hole central engine such as its horizon radius and rotation parameter. Using a minimum jet launching radius from the Advanced LIGO measurement of GW 150914, we calculate photospheric and internal shock models and find that they are marginally inconsistent with the GBM data, but cannot be definitely ruled out. Dissipative photosphere models, however, have no problem explaining the observations. Based on the peak energy …
Fermi Gbm Observations Of Ligo Gravitational-Wave Event Gw150914, V. Connaughton, E. Burns, A. Goldstein, L. Blackburn, M. S. Briggs, B. B. Zhang, J. Camp, N. Christensen, C. M. Hui, P. Jenke, T. Littenberg, J. E. Mcenery, J. Racusin, P. Shawhan, L. Singer, J. Veitch, C. A. Wilson-Hodge, P. N. Bhat, E. Bissaldi, W. Cleveland, G. Fitzpatrick, M. M. Giles, M. H. Gibby, A. Von Kienlin, R. M. Kippen, S. Mcbreen, B. Mailyan, C. A. Meegan, W. S. Paciesas, R. D. Preece, O. J. Roberts, L. Sparke, M. Stanbro
Fermi Gbm Observations Of Ligo Gravitational-Wave Event Gw150914, V. Connaughton, E. Burns, A. Goldstein, L. Blackburn, M. S. Briggs, B. B. Zhang, J. Camp, N. Christensen, C. M. Hui, P. Jenke, T. Littenberg, J. E. Mcenery, J. Racusin, P. Shawhan, L. Singer, J. Veitch, C. A. Wilson-Hodge, P. N. Bhat, E. Bissaldi, W. Cleveland, G. Fitzpatrick, M. M. Giles, M. H. Gibby, A. Von Kienlin, R. M. Kippen, S. Mcbreen, B. Mailyan, C. A. Meegan, W. S. Paciesas, R. D. Preece, O. J. Roberts, L. Sparke, M. Stanbro
Faculty Publications
With an instantaneous view of 70% of the sky, the Fermi Gamma-ray Burst Monitor (GBM) is an excellent partner in the search for electromagnetic counterparts to gravitational-wave (GW) events. GBM observations at the time of the Laser Interferometer Gravitational-wave Observatory (LIGO) event GW150914 reveal the presence of a weak transient above 50 keV, 0.4 s after the GW event, with a false-alarm probability of 0.0022 (2.9σ). This weak transient lasting 1 s was not detected by any other instrument and does not appear to be connected with other previously known astrophysical, solar, terrestrial, or magnetospheric activity. Its localization is ill-constrained …
Do The Fermi Gamma-Ray Burst Monitor And Swift Burst Alert Telescope See The Same Short Gamma-Ray Bursts?, Eric Burns, Valerie Connaughton, Bin Bin Zhang, Amy Lien, Michael S. Briggs, Adam Goldstein, Veronique Pelassa, Eleonora Troja
Do The Fermi Gamma-Ray Burst Monitor And Swift Burst Alert Telescope See The Same Short Gamma-Ray Bursts?, Eric Burns, Valerie Connaughton, Bin Bin Zhang, Amy Lien, Michael S. Briggs, Adam Goldstein, Veronique Pelassa, Eleonora Troja
Faculty Publications
Compact binary system mergers are expected to generate gravitational radiation detectable by ground-based interferometers. A subset of these, the merger of a neutron star with another neutron star or a black hole, are also the most popular model for the production of short gamma-ray bursts (GRBs). The Swift Burst Alert Telescope (BAT) and the Fermi Gamma-ray Burst Monitor (GBM) trigger on short GRBs (SGRBs) at rates that reflect their relative sky exposures, with the BAT detecting 10 per year compared to about 45 for GBM. We examine the SGRB populations detected by Swift BAT and Fermi GBM. We find that …
Estimating Long Grb Jet Opening Angles And Rest-Frame Energetics, Adam Goldstein, Valerie Connaughton, Michael S. Briggs, Eric Burns
Estimating Long Grb Jet Opening Angles And Rest-Frame Energetics, Adam Goldstein, Valerie Connaughton, Michael S. Briggs, Eric Burns
Faculty Publications
We present a method to estimate the jet opening angles of long duration gamma-ray bursts (GRBs) using the prompt gamma-ray energetics and an inversion of the Ghirlanda relation, which is a correlation between the time-integrated peak energy of the GRB prompt spectrum and the collimation-corrected energy in gamma-rays. The derived jet opening angles using this method and detailed assumptions match well with the corresponding inferred jet opening angles obtained when a break in the afterglow is observed. Furthermore, using a model of the predicted long GRB redshift probability distribution observable by the Fermi Gamma-ray Burst Monitor (GBM), we estimate the …
Upper Limits On The Rates Of Binary Neutron Star And Neutron Star-Black Hole Mergers From Advanced Ligo's First Observing Run, B. P. Abbott, R. Abbott, T. D. Abbott, M. R. Abernathy, F. Acernese, K. Ackley, C. Adams, T. Adams, P. Addesso, R. X. Adhikari, V. B. Adya, C. Affeldt, M. Agathos, K. Agatsuma, N. Aggarwal, O. D. Aguiar, L. Aiello, A. Ain, P. Ajith, B. Allen, A. Allocca, P. A. Altin, S. B. Anderson, W. G. Anderson, K. Arai, M. C. Araya, C. C. Arceneaux, J. S. Areeda, N. Arnaud, K. G. Arun, S. Ascenzi, G. Ashton, M. Ast
Upper Limits On The Rates Of Binary Neutron Star And Neutron Star-Black Hole Mergers From Advanced Ligo's First Observing Run, B. P. Abbott, R. Abbott, T. D. Abbott, M. R. Abernathy, F. Acernese, K. Ackley, C. Adams, T. Adams, P. Addesso, R. X. Adhikari, V. B. Adya, C. Affeldt, M. Agathos, K. Agatsuma, N. Aggarwal, O. D. Aguiar, L. Aiello, A. Ain, P. Ajith, B. Allen, A. Allocca, P. A. Altin, S. B. Anderson, W. G. Anderson, K. Arai, M. C. Araya, C. C. Arceneaux, J. S. Areeda, N. Arnaud, K. G. Arun, S. Ascenzi, G. Ashton, M. Ast
Faculty Publications
We report here the non-detection of gravitational waves from the merger of binary-neutron star systems and neutron star-black hole systems during the first observing run of the Advanced Laser Interferometer Gravitationalwave Observatory (LIGO). In particular, we searched for gravitational-wave signals from binary-neutron star systems with component masses ∈[1, 3] M⊙? and component dimensionless spins <0.05. We also searched for neutron star-black hole systems with the same neutron star parameters, black hole mass ∈[2, 99] M⊙, and no restriction on the black hole spin magnitude. We assess the sensitivity of the two LIGO detectors to these systems and find that they could have detected the merger of binary-neutron star systems with component mass distributions of 1.35 ± 0.13M⊙ at a volume-weighted average distance of ∼70 Mpc, and for neutron star-black hole systems with neutron star masses of 1.4M⊙ and black hole masses of at least 5M⊙, a volume-weighted average distance of at least ∼110 Mpc. From this we constrain with 90% confidence the merger rate to be less than 12,600 Gpc-3 yr-1 for binary-neutron star systems and less than 3600 Gpc-3 yr-1 for neutron star-black hole systems. We discuss the astrophysical implications of these results, which we find to be in conflict with only the most optimistic predictions. However, we find that if no detection of neutron star-binary mergers is made in the next two Advanced LIGO and Advanced Virgo observing runs we would place significant constraints on the merger rates. Finally, assuming a rate of -10+20-7 Gpc-3 yr-1, short gamma-ray bursts beamed toward the Earth, and assuming that all short gamma-ray bursts have binary-neutron star (neutron star-black hole) progenitors, we can use our 90% confidence rate upper limits to constrain the beaming angle of the gamma-ray burst to be greater than -2°.3+1.7-1.1 (-4°.3+3.1-1.9).