Foster, J.B., Rathborne, J.M., Sanhueza, P., Claysmith, C., Whitaker, J.S., Jackson, J.M., Mascoop, J.L., Wienen, M., Breen, S.L., Herpin, F., and others. (2013) Characterisation of the MALT90 survey and the mopra telescope at 90 GHz. Publications of the Astronomical Society of Australia, 30 (1). p. 18. ISSN 1323-3580. (doi:10.1017/pasa.2013.18) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:52203)
| The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. | |
| Official URL: http://www.dx.doi.org/10.1017/pasa.2013.18 |
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| Additional URLs: |
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Abstract
We characterise the Millimetre Astronomy Legacy Team 90 GHz Survey (MALT90) 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 arcsec. 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.
| Item Type: | Article |
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| DOI/Identification number: | 10.1017/pasa.2013.18 |
| Uncontrolled keywords: | astrochemistry, H ii regions, instrumentation: spectrographs, ISM: individual (RCW 65), radio lines: ISM, telescopes |
| Subjects: | Q Science > QB Astronomy > QB460 Astrophysics |
| Institutional Unit: | Schools > School of Engineering, Mathematics and Physics > Physics and Astronomy |
| Former Institutional Unit: |
Divisions > Division of Natural Sciences > Physics and Astronomy
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| Depositing User: | James Urquhart |
| Date Deposited: | 24 Nov 2015 12:27 UTC |
| Last Modified: | 20 May 2025 09:40 UTC |
| Resource URI: | https://kar.kent.ac.uk/id/eprint/52203 (The current URI for this page, for reference purposes) |
University of Kent Author Information
Urquhart, J.S..
| Creator's ORCID: |
 https://orcid.org/0000-0002-1605-8050
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