A Rapid Microlensing Event in the Q0957+561 A,B Gravitational Lens System

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.

References in corpus (13)

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Cited by in corpus (18)

• Microlensing of the Broad Emission Line Region in the Quadruple Lens SDSS J1004+4112
• Microlensing variability in the gravitationally lensed quasar Q2237+0305 = the Einstein Cross, I. Spectrophotometric monitoring with the VLT
• Observations Supporting the Existence of an Intrinsic Magnetic Moment Inside the Central Compact Object Within the Quasar Q0957+561
• Observational determination of the time delays in gravitational lens system Q2237+030
• A New Microlensing Event in the Doubly-Imaged Quasar Q0957+561
• Anomalous Fluctuations in Observations of Q0957+561 A,B: Smoking Gun of a Cosmic String?
• Microlensing of a Ring Model for Quasar Structure
• Quasar Microlensing: when compact masses mimic smooth matter
• Accretion Disc Structure and Orientation in the Lensed and Microlensed Q0957+561 Quasar
• Gravitational Nanolensing from Subsolar Mass Dark Matter Halos
• GLITP Optical Monitoring of QSO 0957+561: VR Light Curves and Variability
• Revealing the nonlinear behaviour of the lensed quasar Q0957+561
• High-redshift microlensing and the spatial distribution of dark matter in the form of MACHOs
• Q2237+0305 in X-rays: spectra and variability with XMM-Newton
• Do the Herschel cold clouds in the Galactic halo embody its dark matter?
• The Mass Function of Primordial Rogue Planet MACHOs in quasar nanolensing
• Primordial Planet Formation
• A partially occulting MACHO-microlensing event in the Twin Quasar Q0957+561