Upper limit to the flux of soft X rays from λ-Sco

Details Upper limit to the flux of soft X rays from λ-Sco Upper limit to the flux of soft X rays from λ-Sco

Mar 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974natur.248...34s&link_type=abstract

Nature, Volume 248, Issue 5443, pp. 34-35 (1974).

Physics

4

Scientific paper

DURING a rocket flight on May 26, 1971 which carried a number of large area thin window proportional counters, a soft X-ray source was observed by Bleeker et al.1 in Scorpio. Photons in the energy range 0.37 keV to 1.9 keV were detected from a position error box of approximately 40 square degrees. This admittedly large error box contains the bright star λ-Sco and it was suggested that this object may be the source of the soft X-ray emission that was detected. It is a B1 V star and exhibits a varying radial velocity with a period of about 5.6 d. It has a visual magnitude of 1.62 and its distance is estimated as 100 pc (ref. 2).

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