Optical and X-ray observations of the PSR 1913 + 16 field

Details Optical and X-ray observations of the PSR 1913 + 16 field Optical and X-ray observations of the PSR 1913 + 16 field

Aug 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...200l..19d&link_type=abstract

Astrophysical Journal, vol. 200, Aug. 15, 1975, pt. 2, p. L19-L21. Research supported by the Science Research Council and ERDA

Astronomy and Astrophysics

Astronomy

13

Binary Stars, Pulsars, Stellar Spectrophotometry, X Ray Astronomy, Oao 3, Optical Properties, Spaceborne Astronomy, Ubv Spectra, X Ray Stars

Scientific paper

We have obtained medium-resolution spectra in the yellow of seven stars in the error box of the binary radio pulsar PSR 1913 + 16, using the image-tube scanner at the Lick 3-m telescope. None of the objects is spectroscopically abnormal and thus a strong candidate for membership in the system. The data are used to establish the extinction in the field, which is modest for this low galactic latitude. For three of the stars, limits of the order V exceeding 23 mag on optical pulsations with the frequency of the radio pulsar are derived. X-ray observations of the field have been obtained in the 2.5-7.5 keV band, using the UCL experiment aboard OAO Copernicus. No source is detected, with a 2 sigma upper limit on the time-averaged flux of 1.0 times 10 to the -10th power ergs per sq cm per sec.

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