Transit timing analysis of CoRoT-1b (2009)
Csizmadia, Sz., Renner, S., Barge, P., Agol, E., Aigrain, S., Alonso, R., ...
CoRoT, the pioneer space-based transit search, steadily provides thousands of high-precision light curves with continuous time sampling over periods of up to 5 months. The transits of a planet...
The Sizes of the X-ray and Optical Emission Regions of RXJ1131-1231 (2009)
Dai, X., Kochanek, C. S., Chartas, G., Kozlowski, S., Morgan, C. W., Garmire, G., ...
We use gravitational microlensing of the four images of the z=0.658 quasar RXJ1131-1231 to measure the sizes of the optical and X-ray emission regions of the quasar. The (face-on) scale length of the...
Alien Maps of an Ocean-Bearing World (2009)
Cowan, N. B., Agol, E., Meadows, V. S., Robinson, T., Livengood, T. A., Deming, D., ...
[Abridged] To simulate the kinds of observations that will eventually be obtained for exoplanets, the Deep Impact spacecraft obtained light curves of Earth at seven wavebands spanning 300-1000 nm as...
Eigenbrod, A., Courbin, F., Meylan, G., Agol, E., Anguita, T., Schmidt, R. W., ...
We present the continuation of our long-term spectroscopic monitoring of the gravitationally lensed quasar QSO 2237+0305. We investigate the chromatic variations observed in the UV/optical continuum...
Microlensing to probe the quasar structure: spectrophotometry of Q2237+0305 and of J1131-1231 (2008)
Sluse, D., Eigenbrod, A., Courbin, F., Hutsemékers, D., Meylan, G., ...
We present the main results of the first long-term spectrophotometric monitoring of the ``Einstein cross'' Q2237+0305 and of the single-epoch spectra of the lensed quasar J1131-1231. From October...
Microlensing variability in the gravitationally lensed quasar Q2237+0305 = the Einstein Cross (2008)
Eigenbrod, A., Courbin, F., Sluse, D., Meylan, G., Agol, E.
We present the results of the first long-term (2.2 years) spectroscopic monitoring of a gravitationally lensed quasar, namely the Einstein Cross Q2237+0305. We spatially deconvolve deep VLT/FORS1...
Two-micron all-sky survey J01542930+0053266 : a new eclipsing M dwarf binary system (2008)
Becker, A. C., Agol, E., Silvestri, N. M., Bochanski, J. J., Laws, C., West, A. A., ...
We report on Two-Micron All-Sky Survey (2MASS) J01542930+0053266, a faint eclipsing system composed of two M dwarfs. The variability of this system was originally discovered during a pilot study of...
The periodic eclipses of the pre-main-sequence binary, KH 15D, have been explained by a circumbinary dust ring inclined to the orbital plane, which causes occultations of the stars as they pass...
2MASS J01542930+0053266 : A New Eclipsing M-dwarf Binary System (2008)
Becker, A. C., Agol, E., Silvestri, N. M., Bochanski, J. J., Laws, C., West, A. A., ...
We report on 2MASS J01542930+0053266, a faint eclipsing system composed of two M dwarfs. The variability of this system was originally discovered during a pilot study of the 2MASS Calibration Point...
Eigenbrod, A., Courbin, F., Sluse, D., Meylan, G., Agol, E.
We present the results of the first long-term (2.2 years) spectroscopic monitoring of a gravitationally lensed quasar, namely the Einstein Cross Q2237+0305. The goal of this paper is to present the...
Hot Nights on Extrasolar Planets: Mid-IR Phase Variations of Hot Jupiters (2007)
Cowan, N. B., Agol, E., Charbonneau, D.
We present results from Spitzer Space Telescope observations of the mid-infrared phase variations of three short-period extrasolar planetary systems: HD 209458, HD 179949 and 51 Peg. We gathered IRAC...
Chartas, G., Eracleous, M., Dai, X., Agol, E., Gallagher, S.
We present results from Chandra and XMM-Newton observations of the low-ionization broad absorption line (LoBAL) quasar H 1413+117. Our spatial and spectral analysis of a recent deep Chandra...
On detecting terrestrial planets with timing of giant planet transits (2004)
Agol, E., Steffen, J., Sari, R., Clarkson, W.
The transits of a planet on a Keplerian orbit occur at time intervals exactly equal to the period of the orbit. If a second planet is introduced the orbit is not Keplerian and the transits are no...
Chartas, G., Eracleous, M., Agol, E., Gallagher, S. C.
We present new results uncovered by a re-analysis of a Chandra observation of the gravitationally lensed, low-ionization broad absorption line (LoBAL) quasar H 1413+117. Previous analyses of the same...
Chandra Observations of QSO 2237+0305 (2003)
Dai, X., Chartas, G., Agol, E., Bautz, M. W., Garmire, G. P.
We present the observations of the gravitationally lensed system QSO 2237+0305 performed with the Chandra X-ray Observatory on 2000 Sept. 6, and on 2001 Dec. 8 for 30.3 ks and 9.5 ks, respectively....
The size of a quasar's mid-IR emission region inferred from microlensed images of Q2237+0305 (2001)
Wyithe, J. S. B., Agol, E., Fluke, C. J.
We use published mid-IR and V-band flux ratios for images A and B of Q2237+0305 to demonstrate that the size of the mid-IR emission region has a scale comparable to or larger than the microlens...
Constraints on the mass-profile of the lens galaxy G2237+0305 (2001)
Wyithe, J. S. B., Agol, E., Turner, E. L., Schmidt, R. W.
Published parametric models of the Einstein Cross gravitational lens demonstrate that the image geometry can be reproduced by families of models. In particular, the slope of the mass-profile for the...
Chartas, G., Agol, E., Eracleous, M., Garmire, G., Bautz, M. W., Morgan, N. D.
We present results from monitoring of the distant (z = 2.64), gravitationally lensed quasar MG J0414+0534 with the Chandra X-ray Observatory. An Fe Ka line at 6.49 +/- 0.09 keV (rest-frame) with an...
Hubeny, Ivan, Blaes, Omer, Krolik, Julian H., Agol, E.
We extend our models of the vertical structure and emergent radiation field of accretion disks around supermassive black holes described in previous papers of this series. Our models now include both...
The Puzzle of the Lyman Continuum Polarization of QSOs (2000)
Shields, Gregory, Agol, E., Blaes, Omer
Recent spectropolarimetry of QSOs has revealed a surprising rise in polarization in the Lyman continuum of several objects. We discuss several recent attempts to interpret this feature, including the...
Predicting caustic crossing high magnification events in Q2237+0305 (2000)
Wyithe, J. S. B., Turner, E. L., Webster, R. L., Agol, E.
The central regions of the gravitationally lensed quasar Q2237+0305 can be indirectly resolved on nano-arcsecond scales if viewed spectrophotometricly during a microlensing high magnification event...