Andrew W. Howard

Discovery of Precursor LBV Outbursts in Two Recent Optical Transients: The Fitfully Variable Missing Links UGC 2773-OT and SN 2009ip (2009)

Smith, Nathan, Miller, Adam A., Li, Weidong, Filippenko, Alexei V., Silverman, Jeffrey M., Howard, Andrew W., ...

We present progenitor star detections, light curves, and spectra of SN 2009ip and the 2009 optical transient in UGC 2773 (U2773-OT), which were not genuine supernovae (SNe). In particular, precursor...

HAT-P-7: A Retrograde or Polar Orbit, and a Third Body (2009)

Winn, Joshua N., Johnson, John Asher, Albrecht, Simon, Howard, Andrew W., Marcy, Geoffrey W., Crossfield, Ian J., ...

We show that the exoplanet HAT-P-7b has an extremely tilted orbit, with a true angle of at least 86 degrees with respect to its parent star's equatorial plane, and a strong possibility of retrograde...

Refined stellar, orbital and planetary parameters of the eccentric HAT-P-2 planetary system (2009)

Pál, András, Bakos, Gáspár Á., Torres, Guillermo, Noyes, Robert W., Fischer, Debra A., Johnson, John A., ...

We present refined parameters for the extrasolar planetary system HAT-P-2 (also known as HD 147506), based on new radial velocity and photometric data. HAT-P-2b is a transiting extrasolar planet that...

A Substellar Companion in a 1.3 yr Nearly-circular Orbit of HD 16760 (2009)

Sato, Bunei, Fischer, Debra A., Ida, Shigeru, Harakawa, Hiroki, Omiya, Masashi, Johnson, John A., ...

We report the detection of a substellar companion orbiting the G5 dwarf HD 16760 from the N2K sample. Precise Doppler measurements of the star from Subaru and Keck revealed a Keplerian velocity...

A Third Exoplanetary System with Misaligned Orbital and Stellar Spin Axes (2009)

Johnson, John A., Winn, Joshua N., Albrecht, Simon, Howard, Andrew W., Marcy, Geoffrey W., Gazak, J. Zachary

We present evidence that the WASP-14 exoplanetary system has misaligned orbital and stellar-rotational axes, with an angle lambda = 33.1 +/- 7.4 deg between their sky projections. The evidence is...

The Transit Ingress and the Tilted Orbit of the Extraordinarily Eccentric Exoplanet HD 80606b (2009)

Winn, Joshua N., Howard, Andrew W., Johnson, John Asher, Marcy, Geoffrey W., Gazak, J. Zachary, Starkey, Donn, ...

We present the results of a transcontinental campaign to observe the 2009 June 5 transit of the exoplanet HD 80606b. We report the first detection of the transit ingress, revealing the transit...

A Third Planet Orbiting HIP 14810 (2009)

Wright, Jason T., Fischer, Debra A., Ford, Eric B., Veras, Dimitri, Wang, Ji, Henry, Gregory W., ...

We present new precision radial velocities and a three-planet Keplerian orbit fit for the V = 8.5, G5 V star HIP 14810. We began observing this star at Keck Observatory as part of the N2K Planet...

Old, Rich, and Eccentric: Two Jovian Planets Orbiting Evolved Metal-Rich Stars (2009)

Peek, Kathryn M. G., Johnson, John Asher, Fischer, Debra A., Marcy, Geoffrey W., Henry, Gregory W., Howard, Andrew W., ...

We present radial velocity measurements of two stars observed as part of the Lick Subgiants Planet Search and the Keck N2K survey. Variations in the radial velocities of both stars reveal the...

The Spin-Orbit Misalignment of the XO-3 Exoplanetary System (2009)

Winn, Joshua N., Johnson, John Asher, Fabrycky, Daniel, Howard, Andrew W., Marcy, Geoffrey W., Narita, Norio, ...

We present photometric and spectroscopic observations of the 2009 Feb. 2 transit of the exoplanet XO-3b. The new data show conclusively that the planetary orbital axis and stellar rotation axis are...

The NASA-UC Eta-Earth Program: I. A Super-Earth Orbiting HD 7924 (2009)

Howard, Andrew W., Johnson, John A., Marcy, Geoffrey W., Fischer, Debra A., Wright, Jason T., Henry, Gregory W., ...

We report the discovery of the first low-mass planet to emerge from the NASA-UC Eta-Earth Program, a super-Earth orbiting the K0 dwarf HD 7924. Keplerian modeling of precise Doppler radial velocities...

Pulsenet – A Parallel Flash Sampler and Digital Processor IC for Optical SETI (2008)

Andrew W. Howard, Gu-yeon Wei, William J. Dally, Paul Horowitz

Abstract — PulseNet is a full-custom IC with parallel flash ADC and digital processing that enables an all-sky optical search for extraterrestrial intelligence. It integrates 448 sense amplifiers...

Preprint typeset using L ATEX style emulateapj v. 4/9/03 SEARCH FOR NANOSECOND OPTICAL PULSES FROM NEARBY SOLAR-TYPE STARS (2008)

Andrew W. Howard, David T. Wilkinson, Charlesm. Coldwell, Edward J. Groth, Norm Jarosik, David W. Latham, ...

With “Earth 2000 ” technology we could generate a directed laser pulse that outshines the broadband visible light of the Sun by four orders of magnitude. This is a conservative lower bound for...

Automobile restraints for children: a review for clinicians

Howard, Andrew W.

MORE CANADIAN CHILDREN DIE OF ROAD TRAFFIC INJURIES than of any other cause. Nonuse and misuse of child restraints is common and leads to preventable severe injuries or deaths. This article, intended...

Automobile restraints for children: a review for clinicians

Howard, Andrew W.

MORE CANADIAN CHILDREN DIE OF ROAD TRAFFIC INJURIES than of any other cause. Nonuse and misuse of child restraints is common and leads to preventable severe injuries or deaths. This article, intended...

Global Relevance of Literature on Trauma

Noordin, Shahryar, Wright, James G., Howard, Andrew W.

The trauma pandemic disproportionately kills and maims citizens of low-income countries although the immediate cause of the trauma is often an industrial export of a high-income country, such as a...

Global Access to Literature on Trauma

Noordin, Shahryar, Wright, James G., Howard, Andrew W.

The trauma pandemic disproportionately kills and maims citizens of low-income countries although the immediate cause of the trauma is often an industrial export of a high income country, such as a...