A Rapid Microlensing Event in the Q0957+561A, B Gravitational Lens System
- 1 September 2003
- journal article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 594 (1) , 97-100
- https://doi.org/10.1086/376832
Abstract
We re-analyze brightness data sampled intensively over 5 nights at two epochs separated by the quasar lens time delay, to examine the nature of the observed microlensing. We find strong evidence for a microlensing event with an amplitude of 1% and a time scale of twelve hours. The existence of such rapid microlensing, albeit at low amplitude, imposes constraints on the nature of the quasar and of the baryonic dark matter.Keywords
All Related Versions
This publication has 15 references indexed in Scilit:
- New aperture photometry of QSO 0957+561; application to time delay and microlensingAstronomy & Astrophysics, 2003
- Around‐the‐Clock Observations of the Q0957+561A,B Gravitationally Lensed Quasar. II. Results for the Second Observing SeasonThe Astrophysical Journal, 2003
- Around the Clock Observations of the Q0957+561A,B Gravitationally Lensed QuasarThe Astrophysical Journal, 2002
- Time Delay in QSO 0957+561 From 1984–1999 Optical DataThe Astrophysical Journal, 2001
- Short time-scale fluctuations in the difference light curves of QSO 0957+561A,B: microlensing or noise?Monthly Notices of the Royal Astronomical Society, 2001
- Hourly Variability in Q0957+561The Astrophysical Journal, 2000
- Precision Photometry for Q0957+561 Images A and BThe Astrophysical Journal, 1999
- Signatures of Accretion Disks in Quasar MicrolensingThe Astrophysical Journal, 1997
- A Robust Determination of the Time Delay in 0957+561A, B and a Measurement of the Global Value of Hubble's ConstantThe Astrophysical Journal, 1997
- The time delay of gravitational lens 0957 + 561. I - Methodology and analysis of optical photometric data. II - Analysis of radio data and combined optical-radio analysisThe Astrophysical Journal, 1992