Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.254..563g&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 254, Feb. 15, 1992, p. 563-567.
Astronomy and Astrophysics
Astronomy
6
Quasars, Satellite Observation, Spectrum Analysis, X Ray Sources, X Ray Spectra, Bremsstrahlung, Canonical Forms, Exosat Satellite, Extragalactic Radio Sources, Heao 2
Scientific paper
Exosat observations (0.1-10 keV) of the radio-loud quasar 1928 + 73, which displays superluminal motion, were made at four epochs between 1983/283 and 1984/009, and spectra of this source are obtained from the Exosat database. The X-ray spectrum (0.1-10 keV) can be explained by a power law and uniform absorption model. No significant low-energy absorption or soft excess were detected. Both soft (0.1-2 keV) and hard (2-10 keV) X-ray-flux variations of this quasar were found on a time-scale of one month. Spectral-index values obtained from the power-law model suggest that they exceed the 'canonical' value. A thermal bremsstrahlung model also fits well. Uncorrelated variations of the soft and hard fluxes are found in this source which indicate that they have different origins. A soft excess is apparent when the spectra are fitted with a canonical photon index of about 1.7. The spectra presented here are the first in the X-ray region for 1928 + 73.
Ghosh Kajal K.
Soundararajaperumal S.
No associations
LandOfFree
The X-ray spectrum of the superluminal quasar 1928 + 73 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 The X-ray spectrum of the superluminal quasar 1928 + 73, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The X-ray spectrum of the superluminal quasar 1928 + 73 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1050054