Determining time delay in the gravitationally lensed system QSO2237+0305

Details Determining time delay in the gravitationally lensed system QSO2237+0305 Determining time delay in the gravitationally lensed system QSO2237+0305

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006a%26a...452...37k&link_type=abstract

Astronomy and Astrophysics, Volume 452, Issue 1, June II 2006, pp.37-46

Astronomy and Astrophysics

Astrophysics

14

Gravitational Lensing, Galaxies: Quasars: Individual:, Q2237+0305, Methods: Data Analysis, Cosmology: Observations

Scientific paper

Aims.We considered the possibility of measuring time delays between components of the multiplied quasar QSO2237+0305 and between V and R band variations. Methods: .The analysis is based on the flux variations of four components observed by the OGLE collaboration and Maidanak group during the last quarter of 2003. The observed gradients of the brightness variations in this period for OGLE data in V band are 3.4 mmag/day, 2.2 mmag/day, 2.4 mmag/day, and 1.1 mmag/day for the components A, B, C, and D, respectively. The variations are probably intrinsic source variations. The basic method used for time-delay measurements is the cross-correlation technique. To estimate the uncertainty of the time-delay measurements, Monte Carlo simulations were carried out. Results: .The calculations showed the impossibility of unambiguously measuring the differential time delays between the components. The observations at shorter wavelengths seem to be the only way to achieve robust time delay measurements in the system. The wavelength-dependent time delays can be used to provide the evidence of an accretion-disk structure of the central optical variable source. The observed V and R band variations of component C show good correlation with the correlation coefficient of 0.83. However, the obtained time delay, about 16.2 days, and its accuracy are far from reliable.

Affiliated with

Also associated with

No associations

Rating

Determining time delay in the gravitationally lensed system QSO2237+0305 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 Determining time delay in the gravitationally lensed system QSO2237+0305, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Determining time delay in the gravitationally lensed system QSO2237+0305 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1854587