Periodicities in X-ray binaries from swift/BAT observations

Robin Corbet, Craig Markwardt, Louis Barbier, Scott Barthelmy, Jay Cummings, Neil Gehrels, Hans Krimm, David Palmer, Takanori Sakamoto, Goro Sato, Jack Tueller

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The Burst Alert Telescope (BAT) on board Swift has accumulated extensive light curves for 265 sources (not including GRBs) in the energy range 14 to 200 keV. We present here a summary of searches for periodic modulation in the flux from X-ray binaries. Our results include: determination of the orbital periods of IGR J16418-4532 and IGR J16320-4751; the disappearance of a previously known 9.6 day period in 4U 2206+54; the detection of a 5 hour period in the symbiotic X-ray binary 4U 1954+31, which might be the slowest neutron star rotation period yet discovered; and the detection of flares in the supergiant system IE 1145.1-6141 which occur at both periastron and apastron passage with nearly equal amplitude. We compare techniques of weighting data points in power spectra and present a method related to the semi-weighted mean which, unlike conventional weighting, works well over a wide range of source brightness.

Original languageEnglish
Pages (from-to)200-203
Number of pages4
JournalProgress of Theoretical Physics Supplement
Issue number169
Publication statusPublished - 2007

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periodic variations
bursts
telescopes
thermal neutrons
flares
neutron stars
light curve
power spectra
brightness
x rays
modulation
orbitals
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Corbet, R., Markwardt, C., Barbier, L., Barthelmy, S., Cummings, J., Gehrels, N., ... Tueller, J. (2007). Periodicities in X-ray binaries from swift/BAT observations. Progress of Theoretical Physics Supplement, (169), 200-203.

Periodicities in X-ray binaries from swift/BAT observations. / Corbet, Robin; Markwardt, Craig; Barbier, Louis; Barthelmy, Scott; Cummings, Jay; Gehrels, Neil; Krimm, Hans; Palmer, David; Sakamoto, Takanori; Sato, Goro; Tueller, Jack.

In: Progress of Theoretical Physics Supplement, No. 169, 2007, p. 200-203.

Research output: Contribution to journalArticle

Corbet, R, Markwardt, C, Barbier, L, Barthelmy, S, Cummings, J, Gehrels, N, Krimm, H, Palmer, D, Sakamoto, T, Sato, G & Tueller, J 2007, 'Periodicities in X-ray binaries from swift/BAT observations', Progress of Theoretical Physics Supplement, no. 169, pp. 200-203.
Corbet R, Markwardt C, Barbier L, Barthelmy S, Cummings J, Gehrels N et al. Periodicities in X-ray binaries from swift/BAT observations. Progress of Theoretical Physics Supplement. 2007;(169):200-203.
Corbet, Robin ; Markwardt, Craig ; Barbier, Louis ; Barthelmy, Scott ; Cummings, Jay ; Gehrels, Neil ; Krimm, Hans ; Palmer, David ; Sakamoto, Takanori ; Sato, Goro ; Tueller, Jack. / Periodicities in X-ray binaries from swift/BAT observations. In: Progress of Theoretical Physics Supplement. 2007 ; No. 169. pp. 200-203.
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