Recurrence of the blue wing enhancements in the high ionization lines of SDSS 1004+4112 A

Abstract

We present integral field spectroscopic observations of the quadruple-lensed QSO SDSS 1004+4112 taken with the fiber system INTEGRAL at the William Herschel Telescope on 2004 January 19. In May 2003 a blueward enhancement in the high ionization lines of SDSS 1004+4112A was detected and then faded. Our observations are the first to note a second event of similar characteristics less than one year after. Although initially attributed to microlensing, the resemblance among the spectra of both events and the absence of microlensing-induced changes in the continuum of component A are puzzling. The lack of a convincing explanation under the microlensing or intrinsic variability hypotheses makes the observed enhancements particularly relevant, calling for close monitoring of this object.

4 pages, 5 figures

References in corpus (16)

• Reverberation Measurements for 17 Quasars and the Size-Mass-Luminosity Relations in Active Galactic Nuclei
• Central Masses and Broad-Line Region Sizes of Active Galactic Nuclei: I. Comparing the Photoionization and Reverberation Techniques
• An Empirical Ultraviolet Template for Iron Emission in Quasars as Derived from I Zw 1
• Evidence for Supermassive Black Holes in Active Galactic Nuclei from Emission-Line Reverberation
• Dust and Extinction Curves in Galaxies with z>0: The Interstellar Medium of Gravitational Lens Galaxies
• A Gravitationally Lensed Quasar with Quadruple Images Separated by 14.62 Arcseconds
• Observations and Theoretical Implications of the Large Separation Lensed Quasar SDSS J1004+4112
• The Influence of Gravitational Microlensing on the Broad Emission Lines of Quasars
• Microlensing of the Broad Emission Line Region in the Quadruple Lens SDSS J1004+4112
• Detection of the 2175ÅExtinction Feature at z=0.83
• Chandra Observations of QSO 2237+0305
• Disentangling microlensing and differential extinction in the double QSO HE0512-3329
• Gravitational microlensing of quasar broad line regions at large optical depths
• Caught in the Act; Chandra Observations of Microlensing of the Radio-Loud Quasar MG J0414+0534
• The extinction law in high redshift galaxies
• Chandra Observations of the Cloverleaf Quasar H 1413+117: A Unique Laboratory for Microlensing Studies of a Lobal Quasar

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