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J/A+A/499/395       R magnitudes of 5 double QSOs            (Paraficz+, 2009)

Results of optical monitoring of 5 SDSS double QSOs with the Nordic Optical Telescope. Paraficz D., Hjorth J., Eliasdottir A. <Astron. Astrophys. 499, 395 (2009)> =2009A&A...499..395P
ADC_Keywords: QSOs ; Photometry Keywords: gravitational lensing, cosmological parameters - quasars: general Abstract: We present optical R-band light curves of five SDSS double QSOs (SDSS J0903+5028, SDSS J1001+5027, SDSS J1206+4332, SDSS J1353+1138, SDSS J1335+0118) obtained from monitoring at the Nordic Optical Telescope (NOT) between September 2005 and September 2007. We also present analytical and pixelated modeling of the observed systems. For SDSS J1206+4332, we measured the time delay to be Δτ=116+4-5days, which, for a Singular Isothermal Ellipsoid model, corresponds to a Hubble constant of 73+3-4km/s/Mpc. Simultaneous pixelated modeling of five other systems for which a time delay has now been previously measured at the NOT leads to H0=61.5+8-4km/s/Mpc. Finally, by comparing lightcurves of the two images of each system, suitably shifted by the predicted or observed time-delays, we found no evidence for microlensing variability over the course of the monitoring period. Description: Photometric parameters for five gravitationally lensed quasars obtained at the Nordic Optical Telescope: SDSS J0903+5028, SDSS J1001+5027, SDSS J1206+4332, SDSS J1353+1138, SDSS J1335+0118 are presented. For each quasar image magnitudes and magnitude error are given. Objects: ------------------------------------------------------------------------------ RA (2000) DE Designation(s) (File) ------------------------------------------------------------------------------ 09 03 34.9 +50 28 19 SDSS J0903+5028 = SDSS J090334.92+502819.2 (sdss0903.dat) 10 01 28.6 +50 27 57 SDSS J1001+5027 = SDSS J100128.61+502756.8 (sdss1001.dat) 12 06 29.6 +43 32 18 SDSS J1206+4332 = SDSS J120629.65+433217.6 (sdss1206.dat) 13 53 06.3 +11 38 05 SDSS J1353+1138 = SDSS J135306.35+113804.8 (sdss1353.dat) 13 35 34.8 +01 18 06 SDSS J1335+0118 = SDSS J133534.79+011805.5 (sdss1335.dat) ------------------------------------------------------------------------------ File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file sdss0903.dat 52 32 QSO SDSS 0903 photometric parameters for two images sdss1001.dat 52 30 QSO SDSS 1001 photometric parameters for two images sdss1206.dat 52 31 QSO SDSS 1206 photometric parameters for two images sdss1335.dat 52 32 QSO SDSS 1335 photometric parameters for two images sdss1353.dat 52 38 QSO SDSS 1353 photometric parameters for two images
See also: J/A+A/499/483 : Galactic center star cluster composition (Buchholz+, 2009) : SDSS Home Page Byte-by-byte Description of file: sdss*.dat
Bytes Format Units Label Explanations
1- 9 F9.6 mag RmagA R magnitude of A component 11- 19 F9.6 mag RmagB R magnitude of B component 21- 29 F9.6 mag RmagRef ? R magnitude of reference 31- 38 F8.6 mag e_RmagRef ? Reference R magnitude error 40- 52 F13.5 d JD Julian date
Acknowledgements: Paraficz D., danka.dark(at)
(End) Patricia Vannier [CDS] 09-Mar-2009
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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