Jessica A. Gaskin

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We present an application-specific integrated circuit (ASIC) for high-resolution x-ray spectrometers (XRS). The ASIC reads out signals from pixelated silicon drift detectors (SDDs). The pixel does not have an integrated field effect transistor (FET); rather, readout is accomplished by wire-bonding the anodes to the inputs of the ASIC. The ASIC dissipates 32(More)
Over the past 16 years, NASA's Chandra X-ray Observatory has provided an unparalleled means for exploring the high energy universe with its half-arcsecond angular resolution. Chandra studies have deepened our understanding of galaxy clusters, active galactic nuclei, galaxies, supernova remnants, planets, and solar system objects addressing most, if not all,(More)
NASA's Chandra X-ray Observatory continues to provide an unparalleled means for exploring the high-energy universe. With its half-arcsecond angular resolution, Chandra studies have deepened our understanding of galaxy clusters, active galactic nuclei, galaxies, supernova remnants, neutron stars, black holes, and solar system objects. As we look beyond(More)
Introduction: As NASA prepares for the return of humans to the Moon, it is imperative to address the science and engineering challenges that will be forthcoming. Innumerable insights into the origin and formation of the Moon, characterization of the lunar soil formation processes, and weathering on airless bodies have been made due to the study of the(More)
We have developed a new method to produce thin-entrance-window Silicon Drift Detectors. To produce the desired thin-entrance-window a double implantation was used. This implantation consists of Boron ions (dose of 1&#x00D7;10<sup>14</sup>/cm<sup>2</sup> at 10 keV) plus a second implant of Phosphorus ions (with a dose of 4&#x00D7;1012/cm2 at 50 keV or dose(More)
Recent advancements in the field of x-ray astronomy have relied significantly on innovations in grazing-incidence x-ray optics technology, especially for the hard x-ray range for energies above 10 keV. The behavior of these x-ray telescopes for current and planned astrophysical and solar imaging missions needs to be well understood, and fully characterizing(More)
On September 21st, 2013, the High Energy Replicated Optics to Explore the Sun, or HEROES, balloon-borne x-ray telescope launched from the Columbia Scientific Balloon Facility's site in Ft. Sumner, NM. The flight lasted for ~27 hours and the observational targets included the Sun and astrophysical sources GRS 1915+105 and the Crab Nebula. Over the past year,(More)
The Mir Orbital Station provided a unique platform on which to carry out a variety of space radiation dosimetry measurements. A number of experiments were conducted using a combination of passive detectors on the interior of the Mir during 1996-97. Thermoluminescent detectors were used to measure absorbed dose. CR-39 plastic nuclear track detectors were(More)
We present an Application Specific Integrated Circuit (ASIC) for high resolution x-ray spectrometers (XRS) in radiation harsh environment (such as Jovian system). The ASIC was designed to read out signals from low resistivity pixelated Silicon-Drift-Detectors (SDD) to ensure radiation hardness. The readout is done by wire-bonding the anodes to the inputs of(More)
We present new Chandra X-ray observations of the luminous and cosmologicallysignificant X-ray cluster of galaxies, MS0451.6-0305, at z = 0.5386. Spectral imaging data for the cluster are consistent with an isothermal cluster of (10.0− 10.6)± 1.6 keV, with an intracluster Fe abundance of (0.32−0.40)±0.13 solar. The systematic uncertainties, arising from(More)