Published April 1991
| Version v1
Journal article
Discovery of 111 second pulsation from the X-ray source Scutum X-1
Description
A 111-sec-period X-ray pulsation from Sct X-1 is reported. The pulse profile was found to exhibit double peaks. The x-ray spectrum of Sct X-1 is fitted by a single power-law function with a photon index of about 1.9. Evidence for extremely large absorption (greater than 10 to the 23rd H/sq cm) has been found in the low-energy band and near the iron K-edge. When combined with the previous observations, these data show that the X-ray flux has been variable over more than two orders of magnitude. 15 refs
Additional details
Publishing Information
- Journal Title
- Astrophysical Journal
- Journal Volume
- 370
- Series
- Astrophys. J.
- Journal Page Range
- L77-L79
- ISSN
- 0004-637X
- CODEN
- ASJOA
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 22067693
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Descriptors DEI
- ABSORPTION SPECTRA; COSMIC X-RAY SOURCES; ENERGY SPECTRA; MAPS; PROPORTIONAL COUNTERS; PULSARS; STELLAR RADIATION; VARIATIONS; X-RAY SPECTRA
- Descriptors DEC
- COSMIC RADIO SOURCES; COSMIC RAY SOURCES; MEASURING INSTRUMENTS; RADIATION DETECTORS; RADIATIONS; SPECTRA