Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-04-18
Astronomy and Astrophysics
Astrophysics
11 pages, 10 figures, accepted for publication in Astronomy & Astrophysics
Scientific paper
10.1051/0004-6361:20064934
We present simultaneous XMM-Newton UV and X-ray observations of the quadruply lensed quasar SDSS J1004+4112 (RBS 825). Simultaneously with the XMM-Newton observations we also performed integral field spectroscopy on the two closest lens images A and B using the Calar Alto PMAS spectrograph. In X-rays the widely spaced components C and D are clearly resolved, while the closer pair of images A and B is marginally resolved in the XMM-EPIC images. The integrated X-ray flux of the system has decreased by a factor of 6 since it was observed in the ROSAT All Sky Survey in 1990, while the X-ray spectrum became much harder with the power law index evolving from Gamma=-2.3 to -1.86. By deblending the X-ray images of the lensed QSO we find that the X-ray flux ratios between the lens images A and B are significantly different from the simultaneously obtained UV ratios and previously measured optical flux ratios. Our optical spectrum of lens image A shows an enhancement in the blue emission line wings, which has been observed in previous epochs as a transient feature. We propose a scenario where intrinsic UV and X-ray variability gives rise to line variations which are selectively magnified in image A by microlensing. The extended emission of the lensing cluster of galaxies is clearly detected in the EPIC images, we measure a 0.5-2.0 keV luminosity of 1.4 E44 erg/s. Based on the cluster X-ray properties, we estimate a mass of 2-6 E14 solar masses.
Christensen Lars Lindberg
Lamer Georg
Schwope Axel
Wisotzki Luc
No associations
LandOfFree
Strange magnification pattern in the large separation lens SDSS J1004+4112 from optical to X-rays 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 Strange magnification pattern in the large separation lens SDSS J1004+4112 from optical to X-rays, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Strange magnification pattern in the large separation lens SDSS J1004+4112 from optical to X-rays will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-195359