Photometry of the X-ray source Aquila X-1 during its 1978 outburst

Details Photometry of the X-ray source Aquila X-1 during its 1978 outburst Photometry of the X-ray source Aquila X-1 during its 1978 outburst

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979sval....5..206l&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 5, Aug. 1979, p. 383-387.) Soviet Astronomy Letters, vol. 5, July-Aug. 1979, p. 206-208

Astronomy and Astrophysics

Astronomy

4

Binary Stars, Stellar Spectrophotometry, Visual Photometry, X Ray Astronomy, X Ray Stars, Astronomical Photography, Brightness, Distance, Electrophotometry, Interstellar Extinction, Light Curve, Ubv Spectra

Scientific paper

Photoelectric U, B, V and photographic B, V photometry of Aql X-1 during the flare of July-August 1978 is reported. The optical radiation was variable, exhibiting a period matching the 1.3 day X-ray period; the object is therefore a binary system. The interstellar absorption is estimated; if the object is of spectral type B2 V-B3 V its distance would be approximately 10 kpc. The color variations in Aql X-1 are similar to those in the recurrent X-ray nova V616 Mon.

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