Astronomy and Astrophysics – Astrophysics
Scientific paper
May 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...204.6006b&link_type=abstract
American Astronomical Society Meeting 204, #60.06; Bulletin of the American Astronomical Society, Vol. 36, p.767
Astronomy and Astrophysics
Astrophysics
Scientific paper
QSOs/AGN are the most luminous (≈1046 to 1047 ergs s-1) continuous emitters of energy in the Universe. Their power source is believed to be matter accretion onto a super-massive black hole (MBH≈ 108 - 109 M&sun;). A long-standing challenge is to deduce their physical properties (e.g. black hole mass, accretion rate) from their observed properties. A common observed property is their relatively quiescent variability on monthly time scales, however little is known about intranight variability. We present preliminary results of a pilot study of the intranight variability of quasars of various type. There is substantial evidence for variations of a few hundredths of a magnitude over hourly time scales in both the B and R bands. As the sample size increases, we will make statistical studies of the QSO/AGN variability properties using Fourier analysis, structure function analysis, and wavelet techniques.
Based on observations with the VATT: the Alice P. Lennon Telescope and the Thomas J. Bannan Astrophysics Facility. Work supported by NASA West Virginia EPSCoR.
Beppler B.
Busche J.
Tartamella C.
Turnshek David
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