FURTHER EVIDENCE THAT QUASAR X-RAY EMITTING REGIONS ARE COMPACT: X-RAY AND OPTICAL MICROLENSING IN THE LENSED QUASAR Q J0158-4325

We present four new seasons of optical monitoring data and six epochs of X-ray photometry for the doubly imaged lensed quasar Q J0158-4325. The high-amplitude, short-period microlensing variability for which this system is known has historically precluded a time delay measurement by conventional met...

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Bibliographic Details
Published in:The Astrophysical journal 2012-09, Vol.756 (1), p.1-9
Main Authors: Morgan, Christopher W, Hainline, Laura J, Chen, Bin, Tewes, Malte, Kochanek, Christopher S, Dai, Xinyu, Kozlowski, Szymon, Blackburne, Jeffrey A, Mosquera, Ana M, Chartas, G, Courbin, F, Meylan, G
Format: Article
Language:English
Subjects:
ACCRETION DISKS
ASTROPHYSICS
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
COSMOLOGY
Emission analysis
EMISSION SPECTRA
Emissions control
GAMMA ASTRONOMY
GRAVITATIONAL LENSES
HARD X RADIATION
MONTE CARLO METHOD
Monte Carlo methods
NONLUMINOUS MATTER
PHOTOMETRY
PHOTON EMISSION
QUASARS
SOFT X RADIATION
TIME DELAY
VISIBLE RADIATION
X-RAY SPECTRA
X-rays
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Summary:We present four new seasons of optical monitoring data and six epochs of X-ray photometry for the doubly imaged lensed quasar Q J0158-4325. The high-amplitude, short-period microlensing variability for which this system is known has historically precluded a time delay measurement by conventional methods. We attempt to circumvent this limitation by the application of a Monte Carlo microlensing analysis technique, but we are only able to prove that the delay must have the expected sign (image A leads image B). Despite our failure to robustly measure the time delay, we successfully model the microlensing at optical and X-ray wavelengths to find a half-light radius for soft X-ray emission log(r sub(1/2,)X,soft/cm) = (ProQuest: Formulae and/or non-USASCII text omitted), an upper limit on the half-light radius for hard X-ray emission log(r sub(1/2,)X,hard/cm) [< or =, slant] 14.6, and a refined estimate of the inclination-corrected scale radius of the optical R-band (rest frame 3100 [Angstrom]) continuum emission region of log(r sub(s)/cm) = 15.6 + or - 0.3.
ISSN:0004-637X
1538-4357
DOI:10.1088/0004-637X/756/1/52