Characterisation of the MALT90 Survey and the Mopra Telescope at 90 GHz
| Autor: | Timea Csengeri, Jill Rathborne, Steven N. Longmore, Sadia Hoq, M. Wienen, Andrew Walsh, Fabrice Herpin, Tui Britton, Maxim Voronkov, Shari Breen, Jonathan B. Foster, Tracey Hill, Christopher H. Jordan, K. J. Brooks, Christopher Claysmith, Patricio Sanhueza, Joshua L. Mascoop, Ana Duarte-Cabral, Peter J. Barnes, Balthasar T. Indermuehle, Maria Cunningham, J. S. Whitaker, James Urquhart, Yanett Contreras, James M. Jackson, João Alves |
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| Přispěvatelé: | FORMATION STELLAIRE 2013, Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux (L3AB), Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire aquitain des sciences de l'univers (OASU), Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Laboratoire d'Astrophysique de Bordeaux [Pessac] (LAB), Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Bordeaux (UB) |
| Rok vydání: | 2013 |
| Předmět: |
Physics
[PHYS.ASTR.IM]Physics [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM] 010308 nuclear & particles physics Elevation FOS: Physical sciences Flux Astronomy and Astrophysics Astrophysics - Astrophysics of Galaxies 01 natural sciences [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM] law.invention Telescope Space and Planetary Science law Astrophysics of Galaxies (astro-ph.GA) 0103 physical sciences Calibration Millimeter Astrophysics - Instrumentation and Methods for Astrophysics Instrumentation and Methods for Astrophysics (astro-ph.IM) 010303 astronomy & astrophysics QB Remote sensing |
| Zdroj: | Publications of the Astronomical Society of Australia Publications of the Astronomical Society of Australia, Cambridge University Press (CUP), 2013, 30, pp.id.e038. ⟨10.1017/pasa.2013.18⟩ |
| ISSN: | 1448-6083 1323-3580 |
| Popis: | We characterize the Millimeter Astronomy Legacy Team 90 GHz (MALT90) Survey and the Mopra telescope at 90 GHz. We combine repeated position-switched observations of the source G300.968+01.145 with a map of the same source in order to estimate the pointing reliability of the position-switched observations and, by extension, the MALT90 survey; we estimate our pointing uncertainty to be 8 arcseconds. We model the two strongest sources of systematic gain variability as functions of elevation and time-of-day and quantify the remaining absolute flux uncertainty. Corrections based on these two variables reduce the scatter in repeated observations from 12-25% down to 10-17%. We find no evidence for intrinsic source variability in G300.968+01.145. For certain applications, the corrections described herein will be integral for improving the absolute flux calibration of MALT90 maps and other observations using the Mopra telescope at 90 GHz. Comment: Corrected Figure 5 |
| Databáze: | OpenAIRE |
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