Von Braun, Kaspar, Kane, Stephen R.
Long-period transiting exoplanets provide an opportunity to study the mass-radius relation and internal structure of extrasolar planets. Their studies grant insights into planetary evolution akin to...
Exoplanetary Transit Constraints Based upon Secondary Eclipse Observations (2009)
Kane , Stephen R., Von Braun, Kaspar
Transiting extrasolar planets provide an opportunity to study the mass-radius relation of planets as well as their internal structure. The existence of a secondary eclipse enables further study of...
Refining Exoplanet Ephemerides and Transit Observing Strategies (2009)
Kane, Stephen R., Mahadevan, Suvrath, Von Braun, Kaspar, Laughlin, Gregory, Ciardi, David R.
Transiting planet discoveries have yielded a plethora of information regarding the internal structure and atmospheres of extra-solar planets. These discoveries have been restricted to the...
Observational Window Functions in Planet Transit Surveys (2009)
Von Braun, Kaspar, Kane, Stephen R., Ciardi, David R.
The probability that an existing planetary transit is detectable in one's data is sensitively dependent upon the window function of the observations. We quantitatively characterize and provide...
Exoplanetary Transit Constraints Based Upon Secondary Eclipse Observations (2009)
Kane, Stephen R., Von Braun, Kaspar
Transiting extrasolar planets provide an opportunity to study the mass-radius relation of planets as well as their internal structure. The existence of a secondary eclipse enables further study of...
Observational Window Functions in Planet Transit Surveys (2009)
Von Braun, Kaspar, Kane, Stephen R., Ciardi, David R.
The probability that an existing planetary transit is detectable in one's data is sensitively dependent upon the window function of the observations. We quantitatively characterize and provide...
Directly Determined Linear Radii and Effective Temperatures of Exoplanet Host Stars (2009)
Van Belle, Gerard T., Von Braun, Kaspar
We present interferometric angular sizes for 12 stars with known planetary companions, for comparison with 28 additional main-sequence stars not known to host planets. For all objects we estimate...
Strong Water Absorption in the Dayside Emission Spectrum of the Planet HD 189733b (2009)
Grillmair, Carl J., Burrows, Adam, Charbonneau, David, Armus, Lee, Stauffer, John, Meadows, Victoria, ...
Recent observations of the extrasolar planet HD 189733b did not reveal the presence of water in the emission spectrum of the planet. Yet models of such 'Hot Jupiter' planets predict an abundance of...
Directly Determined Linear Radii and Effective Temperatures of Exoplanet Host Stars (2009)
Van Belle, Gerard T., Von Braun, Kaspar
We present interferometric angular sizes for 12 stars with known planetary companions, for comparison with 28 additional main-sequence stars not known to host planets. For all objects we estimate...
Strong water absorption in the dayside emission spectrum of the planet HD189733b (2008)
Grillmair, Carl J., Burrows, Adam, Charbonneau, David, Armus, Lee, Stauffer, John, Meadows, Victoria, ...
Recent observations of the extrasolar planet HD189733b did not reveal the presence of water in the emission spectrum of the planet^1. Yet models of such 'hot-Jupiter' planets predict an abundance of...
Constraining orbital parameters through planetary transit monitoring (2008)
Kane, Stephen R., Von Braun, Kaspar
The orbital parameters of extrasolar planets have a significant impact on the probability that the planet will transit the host star. This was recently demonstrated by the transit detection of HD...
Constraining Orbital Parameters Through Planetary Transit Monitoring (2008)
Kane, Stephen R., Von Braun, Kaspar
The orbital parameters of extra-solar planets have a significant impact on the probability that the planet will transit the host star. This was recently demonstrated by the transit detection of HD...
Transit Detection of Radial Velocity Planets (2008)
Kane, Stephen R., Von Braun, Kaspar
The orbital parameters of extra-solar planets have a significant impact on the probability that the planet will transit the host star. This was recently demonstrated by the transit detection of HD...
Spitzer 24 μm time series observations of the eclipsing M dwarf binary GU Boötis (2008)
Von Braun, Kaspar, Van Belle, Gerard T., Ciardi, David R., Lopez-Morales, Mercedes, Hoard, D. W., Wachter, Stefanie
We present a set of Spitzer 24 μm MIPS time series observations of the M dwarf eclipsing binary star GU Boötis. Our data cover three secondary eclipses of the system: two consecutive events and an...
Spitzer 24-micron Time-Series Observations of the Eclipsing M-dwarf Binary GU Bootis (2007)
Von Braun, Kaspar, Van Belle, Gerard T., Ciardi, David R., Lopez-Morales, Mercedes, Hoard, D. W., Wachter, Stefanie
We present a set of {\it Spitzer} 24$\mu$m MIPS time series observations of the M-dwarf eclipsing binary star GU Bo\"otis. Our data cover three secondary eclipses of the system: two consecutive...
Observational Window Functions in Planet Transit Searches (2007)
Von Braun, Kaspar, Ciardi, David R.
Window functions describe, as a function of orbital period, the probability that an existing planetary transit is detectable in one's data for a given observing strategy. We show the dependence of...
The Spitzer 24-micron Photometric Light Curve of the Eclipsing M-dwarf Binary GU Bootis (2007)
Von Braun, Kaspar, Van Belle, Gerard T., Ciardi, David, Lopez-Morales, Mercedes, Hoard, D. W., Wachter, Stefanie
We present a carefully controlled set of Spitzer 24 \micron MIPS time series observations of the low mass eclipsing binary star GU Bo\"otis (GU Boo). Our data cover three secondary eclipses of the...
Lee, Brian L., Von Braun, Kaspar, Mallen-Ornelas, Gabriela, Yee, H. K. C., Seager, Sara, Gladders, Michael D.
The EXPLORE Project expanded in 2003 to include a campaign to monitor rich southern open clusters for transits of extrasolar planets (EXPLORE/OC). In May and June 2003, we acquired precise,...
EXPLORE/OC: A Search for Planetary Transits in the Field of NGC 2660 (2003)
Von Braun, Kaspar, Lee, Brian, Mallen-Ornelas, Gabriela, Yee, Howard, Seager, Sara, Gladders, Mike
We present preliminary photometric results of a monitoring study of the open cluster NGC 2660 as part of the EXPLORE/OC project to find planetary transits in Galactic open clusters. Analyzing a total...
A Search for Eclipsing Binaries in Galactic Globular Clusters (2003)
We report on the discovery and analysis of short-period (0.1 days $< P
Von Braun, Kaspar, Mateo, Mario, Chiboucas, Kristin, Athey, Alex, Hurley-Keller, Denise
We report on photometry results of the equatorial globular clusters (GCs) M10 and M12. These two clusters are part of our sample of GCs which we are probing for the existence of photometrically...
Variable Stars in the Field of the Globular Cluster NGC 3201 (2001)
Von Braun, Kaspar, Mateo, Mario
We report on the discovery and analysis of 14 short-period variable stars in the field of the southern globular cluster NGC 3201, located within roughly two magnitudes on either side of the...
An Extinction Map and Color Magnitude Diagram for the Globular Cluster NGC 3201 (2000)
Von Braun, Kaspar, Mateo, Mario
Differential $E_{V-I}$ variations of up to $\sim 0.2$ mag on a scale of arcminutes across NGC 3201 are presented in the form of an extinction map. This map, created by calculating average $E_{V-I}$...
Observational Mishaps - a Database (1999)
Von Braun, Kaspar, Chiboucas, Kristin, Hurley-Keller, Denise
We present a World-Wide-Web-accessible database of astronomical images which suffer from a variety of observational problems, ranging from common occurences, such as dust grains on filters and/or the...
Color-color Relations for Red Giants in Star Clusters (1998)
Von Braun, Kaspar, Chiboucas, Kristin, Minske, Jocelyn Kelly, Salgado, Jose Francisco, Worthey, Guy
New Johnson-Cousins UBVRI photometry of giants in globular clusters is combined with JHK photometry on the CIT system to produce color sequences for giants from the globular clusters M3, M5, M13, and...
Tests of the Tully-Fisher Relation II: Scatter Using Optical Rotation Curves (1997)
Raychaudhury, Somak, Von Braun, Kaspar, Bernstein, Gary M., Guhathakurta, Puragra
We investigate the amount of scatter in the Tully-Fisher relation (TFR) when using optical long-slit H-alpha rotation curves to determine the velocity widths of spiral galaxies. We study a sample of...