Alejandro Clocchiatti

Optical Spectroscopy of the Somewhat Peculiar Type IIb Supernova 2001ig (2009)

Silverman, Jeffrey M., Mazzali, Paolo, Chornock, Ryan, Filippenko, Alexei V., Clocchiatti, Alejandro, Phillips, Mark M., ...

Here we present previously unpublished optical spectra of supernova (SN) 2001ig, a Type IIb SN, from about a week after explosion until nearly one year later. The earliest spectrum consists of only a...

Late-Time HST Photometry of SN 1994I: Hints of Positron Annihilation Energy Deposition (2008)

Clocchiatti, Alejandro, Wheeler, J. Craig, Kirshner, Robert P., Branch, David, Challis, Peter, Chevalier, Roger A., ...

We present multicolor Hubble Space Telescope (HST) WFPC2 broadband observations of the Type Ic SN 1994I obtained approximately 280 days after maximum light. We measure the brightness of the SN and,...

The Sloan Digital Sky Survey Quasar Lens Search. III. Constraints on dark energy from the third data release quasar lens catalog (2008)

Oguri, Masamune, Inada, Naohisa, Strauss, Michael A., Kochanek, Christopher S., Richards, Gordon T., Schneider, Donald P., ...

We present cosmological results from the statistics of lensed quasars in the Sloan Digital Sky Survey (SDSS) Quasar Lens Search. By taking proper account of the selection function, we compute the...

The Sloan Digital Sky Survey Quasar Lens Search. II. Statistical lens sample from the third data release (2008)

Inada, Naohisa, Oguri, Masamune, Becker, Robert H., Shin, Min-Su, Richards, Gordon T., Hennawi, Joseph F., ...

We report the first results of our systematic search for strongly lensed quasars using the spectroscopically confirmed quasars in the Sloan Digital Sky Survey (SDSS). Among 46,420 quasars from the...

The Sloan Digital Sky Survey quasar lens search. III. Constraints on dark energy from the Third Data Release Quasar Lens Catalog (2008)

Oguri, Masamune, Inada, Naohisa, Strauss, Michael A., Kochanek, Christopher S., Richards, Gordon T., Schneider, Donald P., ...

We present cosmological results from the statistics of lensed quasars in the Sloan Digital Sky Survey (SDSS) Quasar Lens Search. By taking proper account of the selection function, we compute the...

The Sloan Digital Sky Survey quasar lens search. II. Statistical lens sample from the Third Data Release (2008)

Inada, Naohisa, Oguri, Masamune, Becker, Robert H., Shin, Min-Su, Richards, Gordon T., Hennawi, Joseph F., ...

We report the first results of our systematic search for strongly lensed quasars using the spectroscopically confirmed quasars in the Sloan Digital Sky Survey (SDSS). Among 46,420 quasars from the...

The Sloan Digital Sky Survey Quasar Lens Search. III. Constraints on Dark Energy from the Third Data Release Quasar Lens Catalog (2007)

Oguri, Masamune, Inada, Naohisa, Strauss, Michael A., Kochanek, Christopher S., Richards, Gordon T., Schneider, Donald P., ...

We present cosmological results from the statistics of lensed quasars in the Sloan Digital Sky Survey (SDSS) Quasar Lens Search. By taking proper account of the selection function, we compute the...

The Sloan Digital Sky Survey Quasar Lens Search. II. Statistical Lens Sample from the Third Data Release (2007)

Inada, Naohisa, Oguri, Masamune, Becker, Robert H., Shin, Min-Su, Richards, Gordon T., Hennawi, Joseph F., ...

We report the first results of our systematic search for strongly lensed quasars using the spectroscopically confirmed quasars in the Sloan Digital Sky Survey (SDSS). Among 46,420 quasars from the...

Discovery of Four Gravitationally Lensed Quasars from the Sloan Digital Sky Survey (2007)

Oguri, Masamune, Inada, Naohisa, Clocchiatti, Alejandro, Kayo, Issha, Shin, Min-Su, Hennawi, Joseph F., ...

We present the discovery of four gravitationally lensed quasars selected from the spectroscopic quasar catalog of the Sloan Digital Sky Survey. We describe imaging and spectroscopic follow-up...

Lightcurves of Type Ia Supernovae from Near the Time of Explosion (2006)

Garg, Arti, Stubbs, Christopher W., Challis, Peter, Wood-Vasey, W. Michael, Blondin, Stephane, Huber, Mark E., ...

We present a set of 11 type Ia supernova (SN Ia) lightcurves with dense, pre-maximum sampling. These supernovae (SNe), in galaxies behind the Large Magellanic Cloud (LMC), were discovered by the...

Using Line Profiles to Test the Fraternity of Type Ia Supernovae at High and Low Redshifts (2006)

Blondin, Stéphane, Dessart, Luc, Leibundgut, Bruno, Branch, David, Höflich, Peter, Tonry, John L., ...

Using archival data of low-redshift (z < 0.01; Center for Astrophysics and SUSPECT databases) Type Ia supernovae (SNe Ia) and recent observations of high-redshift (0.16 < z < 0.64) SNe Ia, we study...

Using Line Profiles to Test the Fraternity of Type Ia Supernovae at High and Low Redshifts (2006)

Blondin, Stéphane, Dessart, Luc, Leibundgut, Bruno, Branch, David, Höflich, Peter, Tonry, John L., ...

Using archival data of low-redshift (z < 0.01; Center for Astrophysics and SUSPECT databases) Type Ia supernovae (SNe Ia) and recent observations of high-redshift (0.16 < z < 0.64) SNe Ia, we study...

Hubble Space Telescope and ground-based observations of type Ia supernovae at redshift 0.5: cosmological implications (2006)

Clocchiatti, Alejandro, Schmidt, Brian P., Filippenko, Alexei V., Challis, Peter, Coil, Alison L., Covarrubias, R., ...

We present observations of the Type I Supernovae (SNe) 1999M, 1999N, 1999Q, 1999S, and 1999U, at redshiftz z ≈ 0.5. They were discovered in early 1999 with the 4.0 m Blanco telescope at Cerro...

Hubble Space Telescope and ground-based observations of type Ia supernovae at redshift 0.5: cosmological implications (2006)

Clocchiatti, Alejandro, Schmidt, Brian P., Filippenko, Alexei V., Challis, Peter, Coil, Alison L., Covarrubias, R., ...

We present observations of the Type I Supernovae (SNe) 1999M, 1999N, 1999Q, 1999S, and 1999U, at redshiftz z ≈ 0.5. They were discovered in early 1999 with the 4.0 m Blanco telescope at Cerro...

Supernova Cosmology and the ESSENCE project (2005)

Sollerman, Jesper, Aguilera, Claudio, Becker, Andy, Blondin, Stephane, Challis, Pete, Clocchiatti, Alejandro, ...

The proper usage of Type Ia supernovae (SNe Ia) as distance indicators has revolutionized cosmology, and added a new dominant component to the energy density of the Universe, dark energy. Following...

Optical and infrared photometry of the nearby type Ia supernovae 1999ee, 2000bh, 2000ca, and 2001 ba (2004)

Krisciunas, Kevin, Phillips, Mark M., Suntzeef, Nicholas B., Persson, S. E., Hamuy, Mario, Antezana, Roberto, ...

We present near-infrared photometry of the Type la supernova (SN) 1999ee; also, optical and infrared photometry of the Type la SNe 2000bh, 2000ca, and 2001ba. For SNe 1999ee and 2000bh, we present...

Optical and infrared photometry of the nearby type Ia supernovae 1999ee, 2000bh, 2000ca, and 2001 ba (2004)

Krisciunas, Kevin, Phillips, Mark M., Suntzeef, Nicholas B., Persson, S. E., Hamuy, Mario, Antezana, Roberto, ...

We present near-infrared photometry of the Type la supernova (SN) 1999ee; also, optical and infrared photometry of the Type la SNe 2000bh, 2000ca, and 2001ba. For SNe 1999ee and 2000bh, we present...

Optical and Infrared Photometry of the Nearby Type Ia Supernovae 1999ee, 2000bh, 2000ca, and 2001ba (2003)

Krisciunas, Kevin, Phillips, Mark M., Suntzeff, Nicholas B., Persson, S. E., Hamuy, Mario, Antezana, Roberto, ...

We present near infrared photometry of the Type Ia supernova 1999ee; also, optical and infrared photometry of the Type Ia SNe 2000bh, 2000ca, and 2001ba. For SNe 1999ee and 2000bh we present the...

23 High Redshift Supernovae from the IfA Deep Survey: Doubling the SN Sample at z>0.7 (2003)

Barris, Brian J., Tonry, John, Blondin, Stephane, Challis, Peter, Chornock, Ryan, Clocchiatti, Alejandro, ...

We present photometric and spectroscopic observations of 23 high redshift supernovae spanning a range of z=0.34-1.03, 9 of which are unambiguously classified as Type Ia. These supernovae were...

Imaging and Demography of the Host Galaxies of High-Redshift Type Ia Supernovae (2003)

Williams, Benjamin F., Hogan, Craig J., Barris, Brian, Candia, Pablo, Challis, Peter, Clocchiatti, Alejandro, ...

We present the results of a study of the host galaxies of high redshift Type Ia supernovae (SNe Ia). We provide a catalog of 18 hosts of SNe Ia observed with the Hubble Space Telescope (HST) by the...

Cosmological Results from High-z Supernovae (2003)

Tonry, John L., Schmidt, Brian P., Barris, Brian, Candia, Pablo, Challis, Peter, Clocchiatti, Alejandro, ...

The High-z Supernova Search Team has discovered and observed 8 new supernovae in the redshift interval z=0.3-1.2. These independent observations, confirm the result of Riess et al. (1998a) and...

Optical Spectra of Type Ia Supernovae at z=0.46 and z=1.2 (2000)

Coil, Alison L., Matheson, Thomas, Filippenko, Alexei V., Leonard, Douglas C., Tonry, John, Riess, Adam G., ...

We present optical spectra, obtained with the Keck 10-m telescope, of two high-redshift type Ia supernovae (SNe Ia) discovered by the High-z Supernova Search Team: SN 1999ff at z=0.455 and SN 1999fv...

Tests of the Accelerating Universe with Near-Infrared Observations of a High-Redshift Type Ia Supernova (2000)

Riess, Adam G., Filippenko, Alexei V., Liu, Michael C., Challis, Peter, Clocchiatti, Alejandro, Diercks, Alan, ...

We have measured the rest-frame B,V, and I-band light curves of a high-redshift type Ia supernova (SN Ia), SN 1999Q (z=0.46), using HST and ground-based near-infrared detectors. A goal of this study...

The Luminous Type Ic SN 1992ar at z=0.145 (1999)

Clocchiatti, Alejandro, Phillips, Mark M., Suntzeff, Nicholas B., DellaValle, Massimo, Cappellaro, Enrico, Turatto, Massimo, ...

We present spectroscopic and photometric observations of SN1992ar, the more distant SN in the Calan/Tololo Survey. We compare its spectrum with those of nearby Type Ia and Ic SNe and conclude that...

The High-Z Supernova Search: Measuring Cosmic Deceleration and Global Cur vature of the Universe Using Type Ia Supernovae (1998)

Schmidt, Brian P., Suntzeff, Nicholas B., Phillips, M. M., Schommer, Robert A., Clocchiatti, Alejandro, Kirshner, Robert P., ...

The High-Z Supernova Search is an international collaboration to discover and monitor type Ia supernovae (SN Ia) at $z > 0.2$ with the aim of measuring cosmic deceleration and global curvature. Our...

Broad Band Polarimetry of Supernovae: SN1994D, SN1994Y, SN1994ae, SN1995D and SN 1995H (1996)

Wang, Lifan, Wheeler, J. Craig, Li, Zongwei, Clocchiatti, Alejandro

We have made polarimetric observations of three Type Ia supernovae (SN Ia) and two type II supernovae (SN II). No significant polarization was detected for any of the SN Ia down to the level of...

Transition type supernovae / (1995)

Clocchiatti, Alejandro.

Tesis (Dr. of Philosophy)--University of Texas, 1995.