Dilday, Benjamin, Kessler, Richard, Frieman, Joshua, Holtzman, Jon, Marriner, John, Miknaitis, Gajus, ...
Also archived in: arXiv:0801.3297 v3 Jul 21 2008
Two more candidate AM Canum Venaticorum (AM CVn) Binaries from the Sloan Digital Sky Survey (2008)
Anderson, Scott, Becker, Andrew, Haggard, Daryl, Prieto, Jose Luis, Knapp, Gillian, Sako, Masao, ...
Also archived in: arXiv:0802.2240 v1 Feb 15 2008
First-Year spectroscopy for the SDSS-II Supernova Survey (2008)
Zheng, Chen, Romani, Roger, Sako, Masao, Marriner, John, Bassett, Bruce, Becker, Andrew, ...
Also archived in: arXiv:0802.3220 v1 Feb 21 2008
First-Year Spectroscopy for the SDSS-II Supernova Survey (2008)
Zheng, Chen, Romani, Roger W., Sako, Masao, Marriner, John, Bassett, Bruce, Becker, Andrew, ...
This paper presents spectroscopy of supernovae discovered in the first season of the Sloan Digital Sky Survey-II Supernova Survey. This program searches for and measures multi-band light curves of...
The Sloan Digital Sky Survey-II Supernova Survey: search Algorithm and follow-up observations (2008)
Sako, Masao, Bassett, Bruce, Becker, Andrew, Cinabro, David, DeJongh, Fritz, Depoy, Darren, ...
Also archived in: arXiv:0708.2750 v2 Oct 19 2007
The Sloan Digital Sky Survey-II Supernova Survey: technical summary (2008)
Frieman, Joshua, Bassett, Bruce, Becker, Andrew, Choi, Changsu, Cinabro, David, DeJongh, Fritz, ...
Also archived in: arXiv:0708.2749 v1 Aug 21 2007
The sloan digital sky survey-II Supernova survey: technical summary (2008)
Frieman, Joshua A., Bassett, Bruce, Becker, Andrew, Choi, Changsu, Cinabro, David, DeJongh, Fritz, ...
First-year spectroscopy for the sloan digital sky survey - II. Supernova survey (2008)
Zheng, Chen, Romani, Roger W., Sako, Masao, Marriner, John, Bassett, Bruce, Becker, Andrew, ...
The sixth data release of the Sloan Digital Sky Survey (2008)
Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Prieto, Carlos Alende, Anderson, Kurt S. J., Anderson, Scott F., ...
This paper describes the Sixth Data Release of the Sloan Digital Sky Survey. With this data release, the imaging of the northern Galactic cap is now complete. The survey contains images and...
The sixth data release of the Sloan Digital Sky Survey (2008)
Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Prieto, Carlos Alende, Anderson, Kurt S. J., Anderson, Scott F., ...
This paper describes the Sixth Data Release of the Sloan Digital Sky Survey. With this data release, the imaging of the northern Galactic cap is now complete. The survey contains images and...
The sixth data release of the sloan digital sky survey (2008)
Adelman-McCarthy, Jennifer K., Agüros, Marcel A., Allam, Sahar S., Allende Prieto, Carlos, Anderson, Kurt S. J., Anderson, Scott F., ...
The sixth data release of the Sloan Digital Sky Survey (2008)
Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Prieto, Carlos Alende, Anderson, Kurt S. J., Anderson, Scott F., ...
This paper describes the Sixth Data Release of the Sloan Digital Sky Survey. With this data release, the imaging of the northern Galactic cap is now complete. The survey contains images and...
The Sloan Digital Sky Survey-II Supernova Survey: Search Algorithm and Follow-up Observations (2007)
Sako, Masao, Bassett, B., Becker, A., Cinabro, D., DeJongh, F., Depoy, D. L., ...
The Sloan Digital Sky Survey-II Supernova Survey has identified a large number of new transient sources in a 300 sq. deg. region along the celestial equator during its first two seasons of a...
CHEMICAL ABUNDANCES IN AN AGN ENVIRONMENT: X-RAY/UV CAMPAIGN ON THE MARKARIAN 279 OUTFLOW (2007)
Arav, Nahum, Gabel, Jack R., Korrista, Kirk T., Kaastra, Jelle S., Kriss, Gerard A., Behar, Ehud, ...
We present the first reliable determination of chemical abundances in an active galactic nucleus (AGN) outflow. The abundances are extracted from the deep and simultaneous Far Ultraviolet...
The peculiar SN 2005hk: Do some type Ia supernovae explode as deflagrations? (2007)
Phillips, M. M., Li, Weidong, Frieman, Joshua A., Blinnikov, S. I., DePoy, Darren, Prieto, José L., ...
The peculiar SN 2005hk: Do some type ia supernovae explode as deflagrations? (2007)
Phillips, M. M., Li, Weidong, Frieman, Joshua A., Blinnikov, S. I., DePoy, Darren, Prietro, Jose L., ...
Publicación ISI
The peculiar SN 2005hk: Do some type ia supernovae explode as deflagrations? (2007)
Phillips, M. M., Li, Weidong, Frieman, Joshua A., Blinnikov, S. I., DePoy, Darren, Prietro, Jose L., ...
Publicación ISI
Chemical Abundances in AGN Environment: X-Ray/UV Campaign on the MRK 279 Outflow (2006)
Arav, Nahum, Gabel, Jack R., Korista, Kirk T., Kaastra, Jelle S., Kriss, Gerard A., Behar, Ehud, ...
We present the first reliable determination of chemical abundances in an AGN outflow. The abundances are extracted from the deep and simultaneous FUSE and HST/STIS observations of Mrk 279. This data...
X-ray Spectral Study of the Photoionized Stellar Wind in Vela~X-1 (2006)
Watanabe, Shin, Sako, Masao, Ishida, Manabu, Ishisaki, Yoshitaka, Kahn, Steven M., Kohmura, Takayoshi, ...
We present results from quantitative modeling and spectral analysis of the high mass X-ray binary Vela X-1 obtained with the Chandra HETGS. The spectra exhibit emission lines from H-like and He-like...
The Fall 2004 SDSS Supernova Survey (2005)
Sako, Masao, Romani, Roger, Frieman, Josh, Adelman-McCarthy, Jen, Becker, Andrew, DeJongh, Fritz, ...
In preparation for the Supernova Survey of the Sloan Digital Sky Survey (SDSS) II, a proposed 3-year extension to the SDSS, we have conducted an early engineering and science run during the fall of...
Gabel, Jack R., Arav, Nahum, Kaastra, Jelle S., Kriss, Gerard A., Behar, Ehud, Costantini, Elisa, ...
We present an analysis of the intrinsic UVabsorption in the Seyfert 1 galaxy Mrk 279 based on simultaneous long observations with the Hubble Space Telescope (41 ks) and the Far Ultraviolet...
Gabel, Jack R., Arav, Nahum, Kaastra, Jelle S., Kriss, Gerard A., Behar, Ehud, Costantini, Elisa, ...
We present an analysis of the intrinsic UV absorption in the Seyfert 1 galaxy Mrk 279 based on simultaneous long observations with the Hubble Space Telescope (41 ks) and the Far Ultraviolet...
The SNAP Strong Lens Survey (2005)
Marshall, Phil, Blandford, Roger, Sako, Masao
Basic considerations of lens detection and identification indicate that a wide field survey of the types planned for weak lensing and Type Ia SNe with SNAP are close to optimal for the optical...
Sako, Masao, Harrison, Fiona, Rutledge, Robert
(abridged) We present uniform, detailed spectral analyses of gamma-ray burst (GRB) X-ray afterglows observed with ASCA, Beppo-SAX, Chandra, and XMM-Newton, and critically evaluate the statistical...
Watanabe, Shin, Sako, Masao, Ishida, Manabu, Ishisaki, Yoshitaka, Kahn, Steve M., Kohmura, Takayoshi, ...
We report the detection of a fully-resolved, Compton-scattered emission line in the X-ray spectrum of the massive binary GX 301-2 obtained with the High Energy Transmission Grating Spectrometer...
A Long Look at NGC 3783 with the XMM-Newton Reflection Grating Spectrometers (2003)
Behar, Ehud, Rasmussen, Andrew P., Blustin, Alexander J., Sako, Masao, Kahn, Steven M., Kaastra, Jelle S., ...
A long 280 ks observation of the Seyfert 1 galaxy NGC 3783 with XMM-Newton is reported. We focus on the oxygen line complex between 17 and 24 A as measured with the RGS spectrometers. Accurate...
Radiative transfer effects due to overlapping X-ray lines in a high-temperature, optically-thick, highly-ionized medium are investigated. One particular example, where the O VIII Ly-alpha doublet...
Soft X-ray Spectra of Seyfert 2 Galaxies (2002)
Sako, Masao, Kinkhabwala, Ali, Kahn, Steven M., Behar, Ehud, Paerels, Frits, Gu, Ming Feng, ...
High resolution spectroscopic observations of Seyfert galaxies with Chandra and XMM-Newton allows us to study the detailed ionization and thermal structures of the X-ray absorbing/emitting material...
Resolving the Effects of Resonant X-ray Line Scattering in Cen X-3 with Chandra (2002)
Wojdowski, Patrick S., Liedahl, Duane A., Sako, Masao, Kahn, Steven M., Paerels, Frederik
The massive X-ray binary Cen X-3 was observed over approximately one quarter of the system's 2.08 day orbit, beginning before eclipse and ending slightly after eclipse center with the Chandra X-ray...
Statistical Re-examination of Reported Emission Lines in the X-ray Afterglow of GRB 011211 (2002)
Rutledge, Robert E., Sako, Masao
(abridged) A 0.2-12 keV spectrum obtained with the XMM EPIC/pn instrument of GRB 011211 was found by Reeves et al. (2002) to contain emission lines which were interpreted to be from Mg XI, Si XIV, S...
The Ionized Stellar Wind in Vela X-1 During Eclipse (2001)
Schulz, Norbert S., Canizares, Claude R., Lee, Julia C., Sako, Masao
We present a first analysis of a high resolution X-ray spectrum of the ionized stellar wind of Vela X-1 during eclipse. The data were obtained with the High Energy Transmission Grating Spectrometer...
Soft X-Ray Absorption by Fe$^{0+}$ to Fe$^{15+}$ in Active Galactic Nuclei (2001)
Behar, Ehud, Sako, Masao, Kahn, Steven M.
A full set of calculations is presented for inner-shell n = 2 to 3 photoexcitation of the 16 iron charge states: Fe I through Fe XVI. The blend of the numerous absorption lines arising from these...
High-Resolution X-Ray Spectroscopy of the Accretion Disk Corona Source 4U 1822-37 (2001)
Cottam, Jean, Sako, Masao, Kahn, Steven M., Paerels, Frits, Liedahl, Duane A.
We present a preliminary analysis of the X-ray spectrum of the accretion disk corona source, 4U 1822-37, obtained with the High Energy Transmission Grating Spectrometer onboard the Chandra X-ray...
X-ray Spectroscopy of Accretion Disks and Stellar Winds in X-Ray Binaries (2001)
Liedahl, Duane A., Wojdowski, Patrick S., Jimenez-Garate, Mario A., Sako, Masao
From hot, tenuous gas dominated by Compton processes, to warm, photoionized emission-line regions, to cold, optically thick fluorescing matter, accreting gas flows in X-ray binaries span a huge...
X-ray spectroscopic studies of accretion-powered cosmic sources (2001)
This thesis presents an overview of X-ray spectroscopy and applications to a particular class of astrophysical objects-accretion-powered X-ray sources. I use data obtained with the Advanced Satellite...
Sako, Masao, Kahn, Steven M., Paerels, Frits, Liedahl, Duane A.
We present a preliminary analysis of the first high-resolution X-ray spectrum of a Seyfert 2 galaxy, Mkn 3, obtained with the High Energy Transmission Grating Spectrometer onboard the Chandra X-ray...
The X-Ray Photoionized Wind in Cen X-3/V779 Cen (2000)
Wojdowski, Patrick S., Liedahl, Duane A., Sako, Masao
We analyze the ASCA spectrum of the Cen X-3 X-ray binary system in eclipse using atomic models appropriate to recombination-dominated level population kinetics in an overionized plasma. In order to...
The Physical Conditions of the X-ray Emission Line Regions in the Circinus Galaxy (2000)
Sako, Masao, Kahn, Steven M., Paerels, Frits, Liedahl, Duane A.
We present a detailed X-ray spectral analysis of the Circinus Galaxy using archival data obtained with the ASCA satellite. The spectrum shows numerous emission lines in the soft X-ray band from...
Paerels, Frits, Cottam, Jean, Sako, Masao, Liedahl, Duane A., Brinkman, A. C., ...
We present a preliminary analysis of the 1--10 keV spectrum of the massive X-ray binary Cyg X-3, obtained with the High Energy Transmission Grating Spectrometer on the Chandra X-ray Observatory. The...
The X-Ray Spectrum and Global Structure of the Stellar Wind in Vela X-1 (1999)
Sako, Masao, Liedahl, Duane A., Kahn, Steven M., Paerels, Frits
We present a quantitative analysis of the X-ray spectrum of the eclipsing high mass X-ray binary Vela X-1 (4U 0900-40) using archival data from ASCA. The observation covers a time interval centered...
Great Earthquakes and Medical Information Systems, with Special Reference to Telecommunications
Miyamoto, Masaki, Sako, Masao, Kimura, Michio, Kanno, Tsuyoshi, Inoue, Michitoshi, Takeda, Hiroshi, ...
The Hanshin-Awaji earthquake in January 1995 caused the greatest number of deaths and injuries in Japan since World War II. Various weaknesses of modern information systems were exposed during and...
Great Earthquakes and Medical Information Systems, with Special Reference to Telecommunications
Miyamoto, Masaki, Sako, Masao, Kimura, Michio, Kanno, Tsuyoshi, Inoue, Michitoshi, Takeda, Hiroshi, ...
The Hanshin-Awaji earthquake in January 1995 caused the greatest number of deaths and injuries in Japan since World War II. Various weaknesses of modern information systems were exposed during and...