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Title: The 8 second optical quasi-periodic oscillations in GX 339 - 4

Abstract

Submillisecond optical photometry of the black hole candidate GX 339 - 4 was obtained on August 1, 1989, (UT) using the 1.5 m telescope of the Cerro Tololo Inter-American Observatory. Eight second quasi-periodic oscillations of width 0.02-0.04 Hz and root mean square amplitude 4-6 percent are found. The visual magnitude of GX 339 - 4 at the beginning of the observation was m(v) = 17.7. Motch et al. (1985) have previously reported 7 s optical quasi-periodic oscillations when GX 339 - 4 was also m(v) = 17.7 and in an X-ray off-state. No X-ray observations were made during the present optical observations and so the X-ray state of GX 339 - 4 cannot be ascertained. In addition, Motch et al. have also reported 20 s optical quasi-periodic oscillations with 30-40 percent full amplitude but when GX 339 - 4 was much brighter, m(v) = 15.4, and in a hard X-ray state. 16 refs.

Authors:
; ; ;  [1]
  1. Oregon Univ., Eugene (USA) Observatories of the Carnegie Institution, Pasadena, CA (USA) Los Alamos National Lab., NM (USA) NASA, Ames Research Center, Moffett Field, CA (USA)
Publication Date:
OSTI Identifier:
6105506
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal; (USA)
Additional Journal Information:
Journal Volume: 365; Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BLACK HOLES; PHOTOMETRY; VISIBLE RADIATION; ACCRETION DISKS; BINARY STARS; COSMIC X-RAY SOURCES; EMISSION SPECTRA; OSCILLATIONS; X RADIATION; COSMIC RAY SOURCES; ELECTROMAGNETIC RADIATION; IONIZING RADIATIONS; RADIATIONS; SPECTRA; STARS; 640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar, Radio & X-Ray Sources

Citation Formats

Imamura, J N, Kristian, J, Middleditch, J, and Steiman-Cameron, T Y. The 8 second optical quasi-periodic oscillations in GX 339 - 4. United States: N. p., 1990. Web. doi:10.1086/169484.
Imamura, J N, Kristian, J, Middleditch, J, & Steiman-Cameron, T Y. The 8 second optical quasi-periodic oscillations in GX 339 - 4. United States. https://doi.org/10.1086/169484
Imamura, J N, Kristian, J, Middleditch, J, and Steiman-Cameron, T Y. 1990. "The 8 second optical quasi-periodic oscillations in GX 339 - 4". United States. https://doi.org/10.1086/169484.
@article{osti_6105506,
title = {The 8 second optical quasi-periodic oscillations in GX 339 - 4},
author = {Imamura, J N and Kristian, J and Middleditch, J and Steiman-Cameron, T Y},
abstractNote = {Submillisecond optical photometry of the black hole candidate GX 339 - 4 was obtained on August 1, 1989, (UT) using the 1.5 m telescope of the Cerro Tololo Inter-American Observatory. Eight second quasi-periodic oscillations of width 0.02-0.04 Hz and root mean square amplitude 4-6 percent are found. The visual magnitude of GX 339 - 4 at the beginning of the observation was m(v) = 17.7. Motch et al. (1985) have previously reported 7 s optical quasi-periodic oscillations when GX 339 - 4 was also m(v) = 17.7 and in an X-ray off-state. No X-ray observations were made during the present optical observations and so the X-ray state of GX 339 - 4 cannot be ascertained. In addition, Motch et al. have also reported 20 s optical quasi-periodic oscillations with 30-40 percent full amplitude but when GX 339 - 4 was much brighter, m(v) = 15.4, and in a hard X-ray state. 16 refs.},
doi = {10.1086/169484},
url = {https://www.osti.gov/biblio/6105506}, journal = {Astrophysical Journal; (USA)},
issn = {0004-637X},
number = ,
volume = 365,
place = {United States},
year = {Sat Dec 01 00:00:00 EST 1990},
month = {Sat Dec 01 00:00:00 EST 1990}
}