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Title: DISCOVERY OF HIGH-ENERGY GAMMA-RAY EMISSION FROM THE BINARY SYSTEM PSR B1259-63/LS 2883 AROUND PERIASTRON WITH FERMI

Abstract

We report on the discovery of {>=}100 MeV {gamma}-rays from the binary system PSR B1259-63/LS 2883 using the Large Area Telescope (LAT) on board Fermi. The system comprises a radio pulsar in orbit around a Be star. We report on LAT observations from near apastron to {approx}128 days after the time of periastron, t{sub p} , on 2010 December 15. No {gamma}-ray emission was detected from this source when it was far from periastron. Faint {gamma}-ray emission appeared as the pulsar approached periastron. At {approx}t{sub p} + 30 days, the {>=}100 MeV {gamma}-ray flux increased over a period of a few days to a peak flux 20-30 times that seen during the pre-periastron period, but with a softer spectrum. For the following month, it was seen to be variable on daily timescales, but remained at {approx}(1-4) x 10{sup -6} cm{sup -2} s{sup -1} before starting to fade at {approx}t{sub p} + 57 days. The total {gamma}-ray luminosity observed during this period is comparable to the spin-down power of the pulsar. Simultaneous radio and X-ray observations of the source showed no corresponding dramatic changes in radio and X-ray flux between the pre-periastron and post-periastron flares. We discuss possible explanations for themore » observed {gamma}-ray-only flaring of the source.« less

Authors:
 [1]; ; ; ; ; ; ; ; ;  [2];  [3];  [4]; ;  [5]; ;  [6];  [7];  [8];  [9];  [10]
  1. Center for Earth Observing and Space Research, College of Science, George Mason University, Fairfax, VA 22030 (United States)
  2. W. W. Hansen Experimental Physics Laboratory, Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics and SLAC National Accelerator Laboratory, Stanford University, Stanford, CA 94305 (United States)
  3. Laboratoire AIM, CEA-IRFU/CNRS/Universite Paris Diderot, Service d'Astrophysique, CEA Saclay, 91191 Gif sur Yvette (France)
  4. Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, I-34127 Trieste (Italy)
  5. Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131 Padova (Italy)
  6. Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, I-56127 Pisa (Italy)
  7. Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, I-06123 Perugia (Italy)
  8. Dipartimento di Fisica 'M. Merlin' dell'Universita e del Politecnico di Bari, I-70126 Bari (Italy)
  9. Laboratoire Leprince-Ringuet, Ecole polytechnique, CNRS/IN2P3, Palaiseau (France)
  10. Institut de Ciencies de l'Espai (IEEC-CSIC), Campus UAB, 08193 Barcelona (Spain)
Publication Date:
OSTI Identifier:
21562531
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal Letters
Additional Journal Information:
Journal Volume: 736; Journal Issue: 1; Other Information: DOI: 10.1088/2041-8205/736/1/L11; Journal ID: ISSN 2041-8205
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BINARY STARS; EMISSION; GAMMA RADIATION; LUMINOSITY; PULSARS; RADIOWAVE RADIATION; X RADIATION; COSMIC RADIO SOURCES; ELECTROMAGNETIC RADIATION; IONIZING RADIATIONS; OPTICAL PROPERTIES; PHYSICAL PROPERTIES; RADIATIONS; STARS

Citation Formats

Abdo, A. A., Ackermann, M., Ajello, M., Allafort, A., Bechtol, K., Berenji, B., Blandford, R. D., Borgland, A. W., Buehler, R., Cameron, R. A., Ballet, J., Barbiellini, G., Bastieri, D., Buson, S., Bellazzini, R., Bregeon, J., Bonamente, E., Brigida, M., Bruel, P., and Caliandro, G. A., E-mail: aous.abdo@nrl.navy.mil, E-mail: dmnparent@gmail.com, E-mail: kent.wood@nrl.navy.mil, E-mail: Simon.Johnston@atnf.csiro.au, E-mail: Andrii.Neronov@unige.ch. DISCOVERY OF HIGH-ENERGY GAMMA-RAY EMISSION FROM THE BINARY SYSTEM PSR B1259-63/LS 2883 AROUND PERIASTRON WITH FERMI. United States: N. p., 2011. Web. doi:10.1088/2041-8205/736/1/L11.
Abdo, A. A., Ackermann, M., Ajello, M., Allafort, A., Bechtol, K., Berenji, B., Blandford, R. D., Borgland, A. W., Buehler, R., Cameron, R. A., Ballet, J., Barbiellini, G., Bastieri, D., Buson, S., Bellazzini, R., Bregeon, J., Bonamente, E., Brigida, M., Bruel, P., & Caliandro, G. A., E-mail: aous.abdo@nrl.navy.mil, E-mail: dmnparent@gmail.com, E-mail: kent.wood@nrl.navy.mil, E-mail: Simon.Johnston@atnf.csiro.au, E-mail: Andrii.Neronov@unige.ch. DISCOVERY OF HIGH-ENERGY GAMMA-RAY EMISSION FROM THE BINARY SYSTEM PSR B1259-63/LS 2883 AROUND PERIASTRON WITH FERMI. United States. doi:10.1088/2041-8205/736/1/L11.
Abdo, A. A., Ackermann, M., Ajello, M., Allafort, A., Bechtol, K., Berenji, B., Blandford, R. D., Borgland, A. W., Buehler, R., Cameron, R. A., Ballet, J., Barbiellini, G., Bastieri, D., Buson, S., Bellazzini, R., Bregeon, J., Bonamente, E., Brigida, M., Bruel, P., and Caliandro, G. A., E-mail: aous.abdo@nrl.navy.mil, E-mail: dmnparent@gmail.com, E-mail: kent.wood@nrl.navy.mil, E-mail: Simon.Johnston@atnf.csiro.au, E-mail: Andrii.Neronov@unige.ch. Wed . "DISCOVERY OF HIGH-ENERGY GAMMA-RAY EMISSION FROM THE BINARY SYSTEM PSR B1259-63/LS 2883 AROUND PERIASTRON WITH FERMI". United States. doi:10.1088/2041-8205/736/1/L11.
@article{osti_21562531,
title = {DISCOVERY OF HIGH-ENERGY GAMMA-RAY EMISSION FROM THE BINARY SYSTEM PSR B1259-63/LS 2883 AROUND PERIASTRON WITH FERMI},
author = {Abdo, A. A. and Ackermann, M. and Ajello, M. and Allafort, A. and Bechtol, K. and Berenji, B. and Blandford, R. D. and Borgland, A. W. and Buehler, R. and Cameron, R. A. and Ballet, J. and Barbiellini, G. and Bastieri, D. and Buson, S. and Bellazzini, R. and Bregeon, J. and Bonamente, E. and Brigida, M. and Bruel, P. and Caliandro, G. A., E-mail: aous.abdo@nrl.navy.mil, E-mail: dmnparent@gmail.com, E-mail: kent.wood@nrl.navy.mil, E-mail: Simon.Johnston@atnf.csiro.au, E-mail: Andrii.Neronov@unige.ch},
abstractNote = {We report on the discovery of {>=}100 MeV {gamma}-rays from the binary system PSR B1259-63/LS 2883 using the Large Area Telescope (LAT) on board Fermi. The system comprises a radio pulsar in orbit around a Be star. We report on LAT observations from near apastron to {approx}128 days after the time of periastron, t{sub p} , on 2010 December 15. No {gamma}-ray emission was detected from this source when it was far from periastron. Faint {gamma}-ray emission appeared as the pulsar approached periastron. At {approx}t{sub p} + 30 days, the {>=}100 MeV {gamma}-ray flux increased over a period of a few days to a peak flux 20-30 times that seen during the pre-periastron period, but with a softer spectrum. For the following month, it was seen to be variable on daily timescales, but remained at {approx}(1-4) x 10{sup -6} cm{sup -2} s{sup -1} before starting to fade at {approx}t{sub p} + 57 days. The total {gamma}-ray luminosity observed during this period is comparable to the spin-down power of the pulsar. Simultaneous radio and X-ray observations of the source showed no corresponding dramatic changes in radio and X-ray flux between the pre-periastron and post-periastron flares. We discuss possible explanations for the observed {gamma}-ray-only flaring of the source.},
doi = {10.1088/2041-8205/736/1/L11},
journal = {Astrophysical Journal Letters},
issn = {2041-8205},
number = 1,
volume = 736,
place = {United States},
year = {2011},
month = {7}
}