| Title: |
Characterisation of the MALT90 Survey and the Mopra Telescope at 90 GHz |
| Authors: |
Foster, JB; Rathborne, JM; Sanhueza, P; Claysmith, C; Whitaker, JS; Jackson, JM; Mascoop, JL; Wienen, M; Breen, SL; Herpin, F; Duarte-Cabral, A; Csengeri, T; Contreras, Y; Indermuehle, B; Barnes, PJ; Walsh, AJ; Cunningham, MR; Britton, TR; Voronkov, MA; Urquhart, JS; Alves, J; Jordan, CH; Hill, T; Hoq, S; Brooks, KJ; Longmore, SN |
| Publication Year: |
2013 |
| Collection: |
Eötvös Loránd University: ELTE Digital Institutional Repository (EDIT) / Eötvös Loránd Tudományegyetem |
| Description: |
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. |
| Document Type: |
article in journal/newspaper |
| File Description: |
application/pdf |
| Language: |
unknown |
| Relation: |
https://hdl.handle.net/10831/48581; elte:000321769000001; elte:3174871; elte:PUBL ASTRON SOC AUST; elte:PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA; elte:30; elte:10067248; LOMS: https://edit.elte.hu/xmlui/bitstream/10831/48581/1/Characterization%20of%20the%20MALT90%20Survey%20and%20the%20Mopra%20Telescope%20at.pdf |
| DOI: |
10.1017/pasa.2013.18 |
| Availability: |
https://hdl.handle.net/10831/48581; https://doi.org/10.1017/pasa.2013.18 |
| Rights: |
info:eu-repo/semantics/openAccess |
| Accession Number: |
edsbas.911F155D |
| Database: |
BASE |