Computer Science
Scientific paper
Apr 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974natur.248..492h&link_type=abstract
Nature, Volume 248, Issue 5448, pp. 492 (1974).
Computer Science
2
Scientific paper
THE binary system associated with the 6.87-mag B0.5Ib star, HD 77581, which is identified1,2 with the Vela X-ray source, 2U0900-40, is a good candidate for optical studies with high time resolution because of its relative brightness. A 28-min data set consisting of consecutive integrations of 1 ms was taken on the night of February 25-26, 1973 with the Cerro Tololo 152-cm telescope using an S-20 photomultiplier with no filter. Analyses using power-spectral and cepstrum techniques3 show no significant activity at a level greater than 0.25% in the range from 0.06 Hz to 500 Hz (except for instrumental artefacts at 60, 180, 300 and 500 Hz). No aperiodic variations were detected to a weaker limit (1%-2%) at low frequencies (<10 Hz) increased variance ascribable to atmospheric scintillation was present. This result was confirmed by a separate analysis of about 15 min of data from an observation of 1 h on the night of January 13-14, 1973. That the X-ray emission is actually associated with a degenerate, collapsed (and perhaps invisible) companion to the brilliant supergiant, however, makes a stronger limit very desirable.
Hesser James Edward
Lasker Barry M.
Miller Richard H.
No associations
LandOfFree
Search for high frequency optical variations in Vela XR-1 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Search for high frequency optical variations in Vela XR-1, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Search for high frequency optical variations in Vela XR-1 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-811925