Browsing by Author "Kastner, Joel"
Now showing items 1-11 of 11
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Automated x-ray spectral classification of young stellar sources detected in Chandra Orion Ultradeep Project observations
Hojnacki, Susan; Kastner, Joel; Micela, G.; Feigelson, E. D.; Grosso, N. (American Astronomical Society, 2004)We are developing an automated classification technique to group X-ray sources detected in CCD imaging into clusters based on X-ray spectral attributes. The algorithm is non-parametric and uses established multivariate ... -
Chandra x-ray detection of a shocked polar jet in the symbiotic Mira System Hen 2-104
Montez, Rodolfo; Kastner, Joel; Sahai, R. (American Astronomical Society, 2006)We report the detection by Chandra's Advanced CCD Imaging Spectrometer (ACIS) of X-ray emission from Hen 2-104, a D-type symbiotic Mira system that sits at the core of an hourglass-shaped bipolar nebula (the "Southern ... -
Chandra/ACIS subpixel event repositioning. II. Further refinements and comparison between backside and front-side illuminated X-ray CCDs
Li, Jingqiang; Kastner, Joel; Prigozhin, Gregory; Schulz, Norbert; Feigelson, Eric; Getman, Konstantin (Astrophysical Journal, 2004-08-01)We further investigate subpixel event repositioning (SER) algorithms in application to Chandra X-ray Observatory (CXO) CCD imaging. SER algorithms have been applied to backside illuminated (BI) Advanced CCD Imaging ... -
General Education Cover Letter to White Paper Draft of 10-20-2006
Clark, Robert; Hermsen, Lisa; Jodoin, Ron; Kastner, Joel; Raman, Marilu; Scanlon, Patrick; Schmitz, Kathryn; Searls, Matt; Sutton, Sean; Waterstram-Rich, Kristen (2006-10-20) -
General Education White Paper (Draft of Oct. 20, 2006)
Clark, Robert; Hermsen, Lisa; Jodoin, Ron; Kastner, Joel; Raman, Marilu; Scanlon, Patrick; Schmitz, Kathryn; Searls, Matt; Sutton, Sean; Waterstram-Rich, Kristen (2006-10-20) -
Refining Chandra/ACIS subpixel event repositioning using a backside illuminated CCD model
Li, Jingqiang; Kastner, Joel; Prigozhin, Gregory; Schulz, Norbert (Astrophysical Journal, 2003-06-10)Subpixel event repositioning (SER) techniques have been demonstrated to significantly improve the already unprecedented spatial resolution of Chandra X-ray imaging with the Advanced CCD Imaging Spectrometer (ACIS). Chandra ... -
RIT Research Programs 2005 Annual Report
Raffaelle, Ryne; Phelps, Andrew; Nasr, Nabil; Winebrake, James; Kastner, Joel; Newman, Dina; Gaborski, Roger; Lawley, Elizabeth; Henderson, Tona; Kandlikar, Satish; Kurinec, Santosh; Robinson, Risa; Ramkumar, S. Manian; Schley, Sara (Rochester Institute of Technology, 2005-10) -
Towards a spectral technique for determining material geometry around evolved stars: Application to HD 179821
Nordhaus, J.; Minchev, I.; Sargent, B.; Forrest, W.; Blackman, Eric; De Marco, O.; Kastner, Joel; Balick, B.; Frank, A. (Wiley-Blackwell, 2008)HD 179821 is an evolved star of unknown progenitor mass range (either post- Asymptotic Giant Branch or post-Red Supergiant) exhibiting a double peaked spectral energy distribution (SED) with a sharp rise from ∼ 8−20 μm. ... -
X-ray diagnostics of pre-main sequence accretion and outflow activity
Kastner, Joel (2005-07)I summarize the mounting evidence for a direct link between pre-main sequence (pre-MS) X-ray emission and pre-MS accretion and outflow processes. Such a link is supported by three lines of observational inquiry rendered ... -
An X-ray outburst from the rapidly accreting young star that illuminates McNeil's Nebula
Kastner, Joel; Richmond, Michael; Grosso, Nicolas; Weintraub, David; Simon, Theodore; Frank, Adam; Hamaguchi, Kenji; Ozawa, Hideki; Henden, Arne (Nature, 2004-07-22)Young, low-mass stars are luminous X-ray sources1 whose powerful X-ray flares^(2-6) may exert a profound influence over the process of planet formation^(7). The origin of such emission is uncertain. Although many or ...