A Comparison of X-ray and Mid-Infrared Selection of Obscured AGN (2009)
Eckart, Megan E., McGreer, Ian D., Stern, Daniel, Harrison, Fiona A., Helfand, David J.
We compare the relative merits of AGN selection at X-ray and mid-infrared wavelengths using data from moderately deep fields observed by both Chandra and Spitzer. The X-ray-selected AGN sample and...
A comprehensive study of GRB 070125, a most energetic gamma-ray burst (2008)
Chandra, Poonam, Cenko, S. Bradley, Frail, Dale A., Chevalier, Roger A., Macquart, Jean-Pierre, Kulkarni, Shri R., ...
We present a comprehensive multiwavelength analysis of the bright, long-duration gamma-ray burst GRB 070125, comprised of observations in gamma-ray, X-ray, optical, millimeter, and centimeter wave...
A comprehensive study of GRB 070125, a most energetic gamma-ray burst (2008)
Chandra, Poonam, Cenko, S. Bradley, Frail, Dale A., Chevalier, Roger A., Macquart, Jean-Pierre, Kulkarni, Shri R., ...
We present a comprehensive multiwavelength analysis of the bright, long-duration gamma-ray burst GRB 070125, comprised of observations in gamma-ray, X-ray, optical, millimeter, and centimeter wave...
GRB 070125: The first long-duration gamma-ray burst in a halo environment (2008)
Cenko, S. Bradley, Fox, Derek B., Penprase, Brian E., Cucchiara, Antonio, Price, Paul A., Berger, Edo, ...
We present the discovery and high signal-to-noise ratio spectroscopic observations of the optical afterglow of the long-duration gamma-ray burst GRB 070125. Unlike all previously observed...
A comprehensive study of GRB 070125, a most energetic gamma ray burst (2008)
Chandra, Poonam, Cenko, S. Bradley, Frail, Dale, Chevalier, Roger, Macquart, Jean-Pierre, Kulkarni, Shri, ...
We present a comprehensive multiwavelength analysis of the bright, long duration gamma-ray burst GRB 070125, comprised of observations in $\gamma$-ray, X-ray, optical, millimeter and centimeter...
Stephen M. Schindler, Walter R. Cook, Je Rey Hammond, Fiona A. Harrison, Thomas A. Prince, Song Wong, ...
This paper describes the balloon-borne coded-aperture telescope, GRIP-2, which is designed for imaging observations of astrophysical sources in the 30 keV { 2 MeV band. GRIP-2 employs the rotating...
Cenko, S. Bradley, Berger, Edo, Nakar, Ehud, Kasliwal, Mansi M., Cucchiara, Antonio, Kulkarni, Shri R., ...
We present optical spectra of the host galaxies of the short-duration gamma-ray burst GRB 070429B and the likely short-duration with extended emission GRB 070714B. In both cases, we find a single...
Chen, C. M. Hubert, Harris, D. E., Harrison, Fiona A., Mao, Peter H.
We observed two relic radio sources, 0917+75 and 1401−33, with the XMM–Newton X-ray observatory. We did not detect any X-ray emission, thermal or non-thermal, in excess of the local background...
Chen, C. M. Hubert, Harris, D. E., Harrison, Fiona A., Mao, Peter H.
We observed two relic radio sources, 0917+75 and 1401-33, with the XMM-Newton X-ray observatory. We did not detect any X-ray emission, thermal or non-thermal, in excess of the local background level...
Position sensitive x-ray spectrophotometer using microwave kinetic inductance detectors (2006)
Mazin, Benjamin A., Bumble, Bruce, Day, Peter K., Eckart, Megan E., Golwala, Sunil, Zmuidzinas, Jonas, ...
The surface impedance of a superconductor changes when energy is absorbed and Cooper pairs are broken to produce single electron (quasiparticle) excitations. This change may be sensitively measured...
A Position Sensitive X-ray Spectrophotometer using Microwave Kinetic Inductance Detectors (2006)
Mazin, Benjamin A., Eckart, Megan E., Bumble, Bruce, Golwala, Sunil, Day, Peter K., Zmuidzinas, Jonas, ...
The surface impedance of a superconductor changes when energy is absorbed and Cooper pairs are broken to produce single electron (quasiparticle) excitations. This change may be sensitively measured...
The Automated Palomar 60-Inch Telescope (2006)
Cenko, S. Bradley, Fox, Derek B., Moon, Dae-Sik, Harrison, Fiona A., Kulkarni, S. R., Henning, John R., ...
We have converted the Palomar 60-inch telescope (P60) from a classical night assistant-operated telescope to a fully robotic facility. The automated system, which has been operational since September...
Eckart, Megan E., Stern, Daniel, Helfand, David J., Harrison, Fiona A., Mao, Peter H., Yost, Sarah A.
We present the catalog of 477 spectra from the Serendipitous Extragalactic X-ray Source Identification (SEXSI) program, a survey designed to probe the dominant contributors to the 2-10 keV cosmic...
Rajala, Anne M., Fox, Derek B., Gal-Yam, Avishay, Leonard, Douglas C., Soderberg, Alicia M., Kulkarni, S. R., ...
We present photometric typing analyses of three young supernovae observed with the Robotic 60-inch Telescope at Palomar Observatory (P60). This represents the first time that such photo-typing has...
Eckart, Megan E., Laird, Elise S., Stern, Daniel, Mao, Peter H., Helfand, David J., Harrison, Fiona A.
The Serendipitous Extragalactic X-ray Source Identification (SEXSI) Program is designed to expand significantly the sample of identified extragalactic hard X-ray sources at intermediate fluxes, 1e-13...
A Galaxy at z = 6.545 and Constraints on the Epoch of Reionization (2004)
Stern, Daniel, Yost, Sarah A., Eckart, Megan E., Harrison, Fiona A., Helfand, David J., Djorgovski, S. G., ...
We report the discovery of a Lyman-alpha-emitting galaxy at redshift z=6.545 serendipitously identified in the course of spectroscopic follow-up of hard X-ray sources on behalf of the Serendipitous...
Harrison, Fiona A., Eckart, Megan E., Mao, Peter H., Helfand, David J., Stern, Daniel
The Serendipitous Extragalactic X-ray Source Identification (SEXSI) Program is designed to extend greatly the sample of identified extragalactic hard X-ray 2-10 keV sources at intermediate fluxes...
W/SiC x-ray multilayers optimized for use above 100 keV (2003)
Windt, David L., Donguy, Soizik, Hailey, Charles J., Koglin, Jason, Honkimaki, Veijo, Ziegler, Eric, ...
We have developed a new depth-graded multilayer system comprising W and SiC layers, suitable for use as hard x-ray reflective coatings operating in the energy range 100-200 keV. Grazing-incidence...
Effects of Bulk and Surface Conductivity on the Performance of CdZnTe Pixel Detectors (2001)
Bolotnikov, Aleksey E., Chen, C. M. Hubert, Cook, Walter R., Harrison, Fiona A., Kuvvetli, Irfan, Schindler, Stephen M.
We studied the effects of bulk and surface conductivity on the performance of high-resistivity CdZnTe (CZT) pixel detectors with Pt contacts. We emphasize the difference in mechanisms of the bulk and...
Physical Constraints From Broadband Afterglow Fits:GRB000926 as an Example (2001)
Yost, Sarah A., Sari, Re'em, Harrison, Fiona A., Berger, Edo, Diercks, Alan, Galama, Titus, ...
We develop a model to fit the broadband afterglows of GRBs from the intrinsic parameters of the fireball's synchrotron emission, and apply it to a few well-studied events, with the goal of...
Properties of Pt Schottky Type Contacts On High-Resistivity CdZnTe Detectors (2001)
Bolotnikov, Aleksey E., Boggs, Steven E., Chen, C. M. Hubert, Cook, Walter R., Harrison, Fiona A., Schindler, Stephen M.
In this paper we present studies of the I-V characteristics of CdZnTe detectors with Pt contacts fabricated from high-resistivity single crystals grown by the high-pressure Brigman process. We have...
Development of Thermally Formed Glass Optics for Astronomical Hard X-ray Telescopes (2000)
Craig, William W., Hailey, Charles J., Jimenez-Garate, Mario, Windt, David L., Harrison, Fiona A., Mao, Peter H., ...
The next major observational advance in hard X-ray/soft gamma-ray astrophysics will come with the implementation of telescopes capable of focusing 10-200 keV radiation. Focusing allows high...
Gamma-Ray Bursts and the Cosmic Star Formation Rate (1998)
Krumholz, Mark R., Thorsett, S. E., Harrison, Fiona A.
We have tested several models of GRB luminosity and redshift distribution functions for compatibility with the BATSE 4B number versus peak flux relation. Our results disagree with recent claims that...