PHOTOMETRIC OBSERVATIONS OF SELECTED, OPTICALLY BRIGHT QUASARS FOR SPACE INTERFEROMETRY MISSION AND OTHER FUTURE CELESTIAL REFERENCE FRAMES
| dc.contributor.author | Ojha, Roopesh | |
| dc.contributor.author | Zacharias, Norbert | |
| dc.contributor.author | Hennessy, Gregory S. | |
| dc.contributor.author | Gaume, Ralph A. | |
| dc.contributor.author | Johnston, Kenneth J. | |
| dc.date.accessioned | 2020-04-24T14:07:24Z | |
| dc.date.available | 2020-04-24T14:07:24Z | |
| dc.date.issued | 2009-07-31 | |
| dc.description.abstract | Photometric observations of 235 extragalactic objects that are potential targets for the Space Interferometry Mission (SIM) are presented. Mean B, V, R, I magnitudes at the 5% level are obtained at 1-4 epochs between 2005 and 2007 using the 1 m telescopes at Cerro Tololo Inter-American Observatory and the Naval Observatory Flagstaff Station. Of the 134 sources that have V magnitudes in the Veron & Veron-Cetty catalog, a difference of over 1.0 mag is found for the observed-catalog magnitudes for about 36% of the common sources, and 10 sources show over 3 mag difference. Our first set of observations presented here form the basis of a long-term photometric variability study of the selected reference frame sources to assist in mission target selection and to support QSO multicolor photometric variability studies in general. | en_US |
| dc.description.sponsorship | We thank Hugh Harris of the USNO Flagstaff Station for many helpful suggestions. This research has made use of NASA’s Astrophysics Data System Bibliographic Services. This research has made use of the NASA/IPAC Extragalactic Database (NED), which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. | en_US |
| dc.description.uri | https://iopscience.iop.org/article/10.1088/0004-6256/138/3/845 | en_US |
| dc.format.extent | 13 pages | en_US |
| dc.genre | journal articles | en_US |
| dc.identifier | doi:10.13016/m2axc6-9bz4 | |
| dc.identifier.citation | Roopesh Ojha,Norbert Zacharias, Gregory S. Hennessy, Ralph A. Gaume, Kenneth J. Johnston, PHOTOMETRIC OBSERVATIONS OF SELECTED, OPTICALLY BRIGHT QUASARS FOR SPACE INTERFEROMETRY MISSION AND OTHER FUTURE CELESTIAL REFERENCE FRAMES, The Astronomical Journal, Volume 138, Number 3, https://doi.org/10.1088%2F0004-6256%2F138%2F3%2F845 | en_US |
| dc.identifier.uri | https://doi.org/10.1088%2F0004-6256%2F138%2F3%2F845 | |
| dc.identifier.uri | http://hdl.handle.net/11603/18239 | |
| dc.identifier.uri | http://simbad.u-strasbg.fr/simbad/sim-ref?querymethod=bib&simbo=on&submit=submit+bibcode&bibcode=2009AJ....138..845O | |
| dc.identifier.uri | https://ned.ipac.caltech.edu/cgi-bin/objsearch?search_type=Search&refcode=2009AJ....138..845O | |
| dc.identifier.uri | http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=J/AJ/138/845 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | IOP | en_US |
| dc.relation.isAvailableAt | The University of Maryland, Baltimore County (UMBC) | |
| dc.relation.ispartof | UMBC Physics Department Collection | |
| dc.relation.ispartof | UMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II) | |
| dc.rights | This item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author. | |
| dc.rights | Public Domain Mark 1.0 | * |
| dc.rights | This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law | |
| dc.rights.uri | http://creativecommons.org/publicdomain/mark/1.0/ | * |
| dc.title | PHOTOMETRIC OBSERVATIONS OF SELECTED, OPTICALLY BRIGHT QUASARS FOR SPACE INTERFEROMETRY MISSION AND OTHER FUTURE CELESTIAL REFERENCE FRAMES | en_US |
| dc.type | Text | en_US |