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J/ApJ/789/125     Light curves of the quasar He 0435-1223    (Blackburne+, 2014)

The optical, ultraviolet, and X-ray structure of the quasar He 0435-1223. Blackburne J.A., Kochanek C.S., Chen B., Dai X., Chartas G. <Astrophys. J., 789, 125 (2014)> =2014ApJ...789..125B (SIMBAD/NED BibCode)
ADC_Keywords: QSOs ; Magnitudes ; Gravitational lensing Keywords: accretion, accretion disks - gravitational lensing: micro - quasars: individual: HE 0435-1223 Abstract: Microlensing has proved an effective probe of the structure of the innermost regions of quasars and an important test of accretion disk models. We present light curves of the lensed quasar HE 0435-1223 in the R band and in the ultraviolet (UV), and consider them together with X-ray light curves in two energy bands that are presented in a companion paper. Using a Bayesian Monte Carlo method, we constrain the size of the accretion disk in the rest-frame near- and far-UV, and constrain for the first time the size of the X-ray emission regions in two X-ray energy bands. The R-band scale size of the accretion disk is about 1015.23 cm (∼23rg), slightly smaller than previous estimates, but larger than would be predicted from the quasar flux. In the UV, the source size is weakly constrained, with a strong prior dependence. The UV to R-band size ratio is consistent with the thin disk model prediction, with large error bars. In soft and hard X-rays, the source size is smaller than ∼1014.8 cm (∼10rg) at 95% confidence. We do not find evidence of structure in the X-ray emission region, as the most likely value for the ratio of the hard X-ray size to the soft X-ray size is unity. Finally, we find that the most likely value for the mean mass of stars in the lens galaxy is ∼0.3 M, consistent with other studies. Description: We use eight seasons of optical R-band photometry resulting from an ongoing monitoring campaign using A Novel Double Imaging Camera (DePoy et al. 2003SPIE.4841..827D) on the Small and Moderate Aperture Research Telescope System 1.3 m telescope. The magnitudes of the four images of HE 0435 have been monitored since 2003 August in the R band (rest frame 2417 Å, with a cadence varying from one day to about a week. An automated pipeline subtracts instrumental bias and flat-fields the images in the standard way. Three to six images are obtained per epoch, and we combine them to increase the signal to noise ratio and reject cosmic rays. We measure the fluxes of the quasar images and the lens galaxy using the point spread function (PSF) fitting method described in detail by Kochanek et al. (2006ApJ...640...47K). Objects: ---------------------------------------------------------- RA (ICRS) DE Designation ---------------------------------------------------------- 04 38 14.8 -12 17 15 HE 0435-1223 = HE 0435-1223 ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 59 403 R-band Light Curves
See also: J/A+A/455/L1 : Variability of 5 gravitationally lensed QSOs (Paraficz+, 2006) J/AJ/135/1384 : R-band variability in 5 blazars (Gupta+, 2008) J/A+A/499/395 : R magnitudes of 5 double QSOs (Paraficz+, 2009) J/A+A/536/A53 : R-band light curves of HE 0435-1223 (Courbin+, 2011) J/A+A/544/A51 : R-band photometry of the lensed quasar UM673 (Koptelova+, 2012) J/ApJ/756/52 : R-band light curve of QSO J0158-4325 images (Morgan+, 2012) J/A+A/553/A121 : 2 lensed quasars light curves (Eulaers+, 2013) J/A+A/556/A22 : R-band light curves of RX J1131-1231 (Tewes+, 2013) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 11 F11.3 d HJD Heliocentric Julian Date 13- 17 F5.3 mag RmagA R band magnitude for image A 19- 23 F5.3 mag e_RmagA Uncertainty in Rmag-A 25- 29 F5.3 mag RmagB R band magnitude for image B 31- 35 F5.3 mag e_RmagB Uncertainty in Rmag-B 37- 41 F5.3 mag RmagC R band magnitude for image C 43- 47 F5.3 mag e_RmagC Uncertainty in Rmag-C 49- 53 F5.3 mag RmagD R band magnitude for image D 55- 59 F5.3 mag e_RmagD Uncertainty in Rmag-D
History: From electronic version of the journal
(End) Prepared by [AAS], Tiphaine Pouvreau [CDS] 09-Mar-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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