5 papers
The X-Ray Continuum Emission Region in the Lensed Quasar SDSS J133907.23+131038.6 is Much Smaller than the Accretion Disk
Christopher W. Morgan, James B. Margeson, Gilberto Garcia +4
We analyze microlensing variability in 15 seasons of optical monitoring data and 4 epochs of new X-ray observations of the doubly-imaged gravitationally lensed quasar SDSS J133907.…
Primordial black holes in the main lensing galaxy of FBQ 0951+2635
Daniel Isla, Luis J. Goicoechea, Ana Esteban-Gutiérrez +4
Although dark matter in galaxies may consist of elementary particles different from those that make up ordinary matter and that would be smoothly distributed (still undetected), th…
SDSS J1001+5027: Strong microlensing-induced chromatic variation caught in the act
Luis J. Goicoechea, Vyacheslav N. Shalyapin
We conducted long-term monitoring of the doubly imaged gravitationally lensed quasar SDSS J1001+5027 consisting of spectro-photometric observations separated by 120 days (tim…
FBQ 0951+2635: time delay and structure of the main lensing galaxy
Vyacheslav N. Shalyapin, Luis J. Goicoechea, Eleana Ruiz-Hinojosa
As there is a long-standing controversy over the time delay between the two images of the gravitationally lensed quasar FBQ 0951+2635, we combined early and new optical light curve…
Parameter free Hubble constant from the quadruply lensed quasar SDSS J1004 + 4112
J. MartÃnez-Arrizabalaga, J. M. Diego, L. J. Goicoechea
We present a free-form lens model for the multiply lensed quasar in the galaxy cluster SDSS J. Our lens model makes minimal assumptions about the distribution of mass in…