Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Mark T. Adams"'
Publikováno v:
The Astronomical Journal. 127:2228-2245
We summarize the results of an observing campaign to identify periodic pre?main-sequence (PMS) variables in the NGC?2264 OB association. We find 201 periodic candidates. The mean age of the NGC?2264 periodic variables is approximately 30% greater tha
Autor:
Brian M. Patten, Burton F. Jones, Mark T. Adams, Luisa Rebull, Lynne A. Hillenbrand, Amanda Birmingham, H. Yagi, S. E. Strom, Russell B. Makidon
Publikováno v:
The Astronomical Journal. 123:1528-1547
We present an optical and near-infrared study of a 45' × 45' field in NGC 2264, which includes both S Mon and the Cone Nebula. We report photometry at optical (UBVRCIC) and near-infrared (JHK) wavelengths for ~5600 stars and spectroscopic classifica
Autor:
Donald P. Schneider, Xiaohui Fan, Michael A. Strauss, James E. Gunn, Gordon T. Richards, Gary J. Hill, Phillip J. MacQueen, Lawrence W. Ramsey, Mark T. Adams, John A. Booth, Grant M. Hill, G. R. Knapp, Robert H. Lupton, David H. Saxe, Matthew Shetrone, Joseph R. Tufts, Daniel E. Vanden Berk, Marsha J. Wolf, Donald G. York, John E. Anderson, Jr., Scott F. Anderson, Neta A. Bahcall, J. Brinkmann, Robert Brunner, István Csabai, Masataka Fukugita, G. S. Hennessy, Željko Ivezić, Donald Q. Lamb, Jeffrey A. Munn, Aniruddha R. Thakar
Publikováno v:
The Astronomical Journal. 121:1232-1240
We report the discovery of 27 quasars with redshifts between 3.58 and 4.49. The objects were identified as high-redshift candidates based on their colors in Sloan Digital Sky Survey commissioning data. The redshifts were confirmed with low resolution
Autor:
Russell B. Makidon, C. M. Pavlovsky, Brian M. Patten, S. E. Strom, Luisa Rebull, Douglas K. Duncan, Mark T. Adams, Lynne A. Hillenbrand
Publikováno v:
The Astronomical Journal. 119:3026-3043
We present an optical study of four 45' × 45' fields centered ~05 east, west, north, and south of the Orion Nebula Cluster center. We have measured V and IC photometry for ~5000 stars, and U photometry for ~1600 of these. We have obtained spectral c
Autor:
David R. Doss, K. Reinsch, C. Renée James, Vincent M. Woolf, Mark T. Adams, Guillermo A. González, Christopher M. Johns-Krull, R. Earle Luck, N. Kameswara Rao, David L. Lambert, Artie P. Hatzes, Jocelyn Tomkin, Gajendra Pandey
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 310:717-744
A set of high-resolution optical spectra of RCrB acquired before, during, and after its 1995-1996 decline is discussed. All of the components reported from earlier declines are seen. This novel dataset provides new information on these components inc
Publikováno v:
Full Proceedings of the Thirteenth Multidisciplinary Conference on Sinkholes and the Engineering and Environmental Impacts of Karst.
Autor:
Phillip W. Kelton, Mark T. Adams, John A. Booth, Lawrence W. Ramsey, Phillip J. MacQueen, Gary J. Hill, Edwin S. Barker, David L. Lambert, Gordon L. Wesley, John M. Good, Povilas Palunas, James R. Fowler, Frank N. Bash
Publikováno v:
SPIE Proceedings.
The Hobby-Eberly Telescope (HET) is a fixed-elevation, 9.2-m telescope with a spherical primary mirror and a tracker at prime focus to follow astronomical objects. The telescope was constructed for $13.9M over the period 1994-1997. A series of extens
Autor:
Gregory H. Ames, John M. Rakoczy, John A. Booth, Edward E. Montgomery, James R. Fowler, Mark T. Adams, Marsha J. Wolf, Povilas Palunas
Publikováno v:
SPIE Proceedings.
A sensing and control system for maintaining the optical alignment of the ninety-one 1-meter diameter hexagonal segments forming the Hobby-Eberly Telescope (HET) primary mirror array has been developed by NASA - Marshall Space Flight Center (Huntsvil
Autor:
John M. Good, Mark T. Adams, Phillip W. Kelton, Gary J. Hill, Mark E. Cornell, John A. Booth, Phillip J. MacQueen, Frank N. Bash, Edwin S. Barker, Lawrence W. Ramsey, Marsha J. Wolf, Edward L. Robinson, James R. Fowler, Povilas Palunas
Publikováno v:
SPIE Proceedings.
The Hobby-Eberly Telescope (HET) is a fixed-elevation, 9.2-m telescope with a spherical primary mirror and a tracker at prime focus to follow astronomical objects. The telescope was constructed for $13.9M over the period 1994-1997. A number of telesc
Autor:
Gregory H. Ames, John A. Booth, William Ly, John T. Weir, Edward E. Montgomery, James R. Fowler, John M. Rakoczy, Mark T. Adams, Richard T. Howard, Drew Hall
Publikováno v:
SPIE Proceedings.
The Segment Alignment Maintenance System (SAMs) was installed on McDonald Observatory's Hobby-Eberly Telescope (HET) in August 2001. The SAMs became fully operational in October 2001. The SAMs uses a system of 480 inductive edge sensors to correct mi