Solid State Astrophysics: Probing Interstellar Dust and Gas Properties with X-rays (2009)
Lee, Julia C., Smith, Randall K., Canizares, C. R., Costantini, E., De Vries, C., Drake, J., ...
The abundances of gas and dust (solids and complex molecules) in the interstellar medium (ISM) as well as their composition and structures impact practically all of astrophysics. Fundamental...
Plucinsky, Paul P., Haberl, Frank, Dewey, Daniel, Beardmore, Andrew P., DePasquale, Joseph M., Godet, Olivier, ...
The flight calibration of the spectral response of CCD instruments below 1.5 keV is difficult in general because of the lack of strong lines in the on-board calibration sources typically available....
X-ray Dust Scattering at Small Angles: The Complete Halo around GX13+1 (2008)
The exquisite angular resolution available with Chandra should allow precision measurements of faint diffuse emission surrounding bright sources, such as the X-ray scattering halos created by...
Chandra ACIS survey of M33 (ChASeM33): a first look (2008)
Plucinsky, Paul P., Williams, Benjamin, Long, Knox S., Gaetz, Terrance J., Sasaki, Manami, Pietsch, Wolfgang, ...
Plucinsky, Paul P., Haberl, Frank, Dewey, Daniel, Beardmore, Andrew P., DePasquale, Joseph M., Godet, Olivier, ...
Chandra ACIS Survey of M33 (ChASeM33): A First Look (2007)
Plucinsky, Paul P., Williams, Benjamin, Long, Knox S., Gaetz, Terrance J., Sasaki, Manami, Pietsch, Wolfgang, ...
We present an overview of the Chandra ACIS Survey of M33 (ChASeM33): A Deep Survey of the Nearest Face-on Spiral Galaxy. The 1.4 Ms survey covers the galaxy out to $R \approx 18\arcmin (\approx 4$...
The Symbiotic System SS73 17 Seen with Suzaku (2007)
Smith, Randall K., Mushotzky, Richard, Mukai, Koji, Kallman, Tim, Markwardt, Craig B., Tueller, Jack
We observed with Suzaku the symbiotic star SS73 17, motivated by the discovery by the INTEGRAL satellite and the Swift BAT survey that it emits hard X-rays. Our observations showed a highly-absorbed...
Suzaku Observations of the Local and Distant Hot ISM (2006)
Smith, Randall K., Bautz, Mark W., Edgar, Richard J., Hamaguchi, Kenji, Hughes, John P., Ishida, Manabu, ...
Suzaku observed the molecular cloud MBM12 and a blank field less than 3 degrees away to separate the local and distant components of the diffuse soft X-ray background. Towards MBM12, a local (D< 275...
The X-ray Halo of GX5-1 (2006)
Smith, Randall K, Dame, T. M., Costantini, Elisa, Predehl, Peter
Using Chandra observations we have measured the energy-resolved dust-scattered X-ray halo around the low-mass X-ray binary GX5-1, which shows signs of both singly- and multiply-scattered X-rays. We...
FUV and X-ray Observations of the Reverse Shock in the SMC SNR 1E 0102.2-7219 (2006)
Sasaki, Manami, Gaetz, Terrance J., Blair, William B., Edgar, Richard J., Morse, Jon A., Plucinsky, Paul P., ...
We present FUSE and XMM-Newton data for the reverse shock of the O-rich SNR 1E0102.2-7219 in the SMC. The FUSE observations cover three regions with significantly different optical [O III]...
A Million-Second Chandra View of Cassiopeia A (2004)
Hwang, Una, Laming, J. Martin, Badenes, Carles, Berendse, Fred, Blondin, John, Cioffi, Denis, ...
We introduce a million-second observation of the supernova remnant Cassiopeia A with the Chandra X-ray Observatory. The bipolar structure of the Si-rich ejecta (NE jet and SW counterpart) is clearly...
An X-ray jet discovered by Chandra in the z=4.3 radio-selected quasar GB 1508+5714 (2003)
Siemiginowska, Aneta, Smith, Randall K., Aldcroft, Thomas L., Schwartz, D. A., Paerels, Frederic, Petric, Andreea O.
We report the Chandra discovery of an X-ray jet associated with the redshift 4.3 radio-loud quasar GB 1508+5714. The jet X-ray emission peaks ~2 arcsec to the South-West of the quasar core. We...
Probing Interstellar Dust Models Through SAXS (Small Angle X-Ray Scattering) (2003)
Dwek, Eli, Zubko, Viktor, Arendt, Richard G., Smith, Randall K.
A viable interstellar dust model - characterized by the composition, morphology, and size distribution of the dust grains and by the abundance of the different elements locked up in the dust - should...
The X-ray Halo of GX 13+1 (2002)
Smith, Randall K., Edgar, Richard J., Shafer, Richard A.
We present observations of the X-ray halo around the LMXB GX 13+1 from the Chandra X-ray telescope. The halo is caused by scattering in interstellar dust grains, and we use it to diagnose the...
An X-Ray Study of the Supernova Remnant G290.1-0.8 (2001)
Slane, Patrick, Smith, Randall K., Hughes, John P., Petre, Robert
G290.1-0.8 (MSH 11-61A) is a supernova remnant (SNR) whose X-ray morphology is centrally bright. However, unlike the class of X-ray composite SNRs whose centers are dominated by nonthermal emission,...
Smith, Randall K., Brickhouse, Nancy S., Liedahl, Duane A., Raymond, John C.
New X-ray observatories (Chandra and XMM-Newton) are providing a wealth of high-resolution X-ray spectra in which hydrogen- and helium-like ions are usually strong features. We present results from a...
X-ray Halos and Large Grains in the Diffuse Interstellar Medium (2001)
Witt, Adolf N., Smith, Randall K., Dwek, Eli
Recent observations with dust detectors on board the interplanetary spacecraft Ulysses and Galileo have recorded a substantial flux of large interstellar grains with radii between 0.25 and 2.0 mu...
Gaetz, T. J., Butt, Yousaf M., Edgar, Richard J., Eriksen, Kristoffer A., Plucinsky, Paul P., Schlegel, Eric M., ...
We present observations of the young, Oxygen-rich supernova remnant 1E0102.2-7219 taken by the Chandra X-ray Observatory during Chandra's Orbital Activation and Checkout phase. The boundary of the...
Soft X-ray Scattering and Halos from Dust (1997)
Small angle scatterings of X-rays by interstellar dust particles create halos around x-ray sources. By observing these halos with sufficient angular resolution it is possible to derive information...