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Article: Flux calibration of the AAO/UKST superCOSMOS Hα survey

TitleFlux calibration of the AAO/UKST superCOSMOS Hα survey
Authors
KeywordsTechniques
Miscellaneous-ISM
General -HII regions-planetary nebulae
Photometric-astronomical data bases
Supernova remnants
General-ISM
Issue Date2014
Citation
Monthly Notices of the Royal Astronomical Society, 2014, v. 440, n. 2, p. 1080-1094 How to Cite?
AbstractThe AAO/UKST SuperCOSMOS Hα Survey (SHS) was, when completed in 2003, a powerful addition to extant wide-field surveys. The combination of areal coverage, spatial resolution and sensitivity in a narrow imaging band, still marks it out today as an excellent resource for the astronomical community. The 233 separate fields are available online in digital form, with each field covering 25 deg2. The SHS has been the motivation for equivalent surveys in the north, and new digital Hα surveys now beginning in the south such as VPHAS+. It has been the foundation of many important discovery projects with the Macquarie/AAO/Strasbourg Hα planetary nebula project being a particularly successful example. However, the full potential of the SHS has been hampered by lack of a clear route to acceptable flux calibration from the base photographic data. We have determined the calibration factors for 170 individual SHS fields, and present a direct pathway to the measurement of integrated Ha fluxes and surface brightnesses for resolved nebulae detected in the SHS.We also include a catalogue of integrated Hα fluxes for >100 planetary and other nebulae measured from the SHS, and use these data to show that fluxes, accurate to ±0.10-0.14 dex (~25-35 per cent), can be obtained from these fields. For the remaining 63 fields, a mean calibration factor of 12.0 counts pixel-1 R-1 can be used, allowing the determination of reasonable integrated fluxes accurate to better than ±0.2 dex (~50 per cent). We outline the procedures involved and the caveats that need to be appreciated in achieving such flux measurements. This paper forms a handy reference source that will significantly increase the scientific utility of the SHS. © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.
Persistent Identifierhttp://hdl.handle.net/10722/209031
ISSN
2015 Impact Factor: 4.952
2015 SCImago Journal Rankings: 2.806

 

DC FieldValueLanguage
dc.contributor.authorFrew, David J.-
dc.contributor.authorBojičić, Ivan S.-
dc.contributor.authorParker, Quentin A.-
dc.contributor.authorPierce, Mark J.-
dc.contributor.authorGunawardhana, Madusha L P-
dc.contributor.authorReid, Warren A.-
dc.date.accessioned2015-03-23T02:31:13Z-
dc.date.available2015-03-23T02:31:13Z-
dc.date.issued2014-
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, 2014, v. 440, n. 2, p. 1080-1094-
dc.identifier.issn0035-8711-
dc.identifier.urihttp://hdl.handle.net/10722/209031-
dc.description.abstractThe AAO/UKST SuperCOSMOS Hα Survey (SHS) was, when completed in 2003, a powerful addition to extant wide-field surveys. The combination of areal coverage, spatial resolution and sensitivity in a narrow imaging band, still marks it out today as an excellent resource for the astronomical community. The 233 separate fields are available online in digital form, with each field covering 25 deg2. The SHS has been the motivation for equivalent surveys in the north, and new digital Hα surveys now beginning in the south such as VPHAS+. It has been the foundation of many important discovery projects with the Macquarie/AAO/Strasbourg Hα planetary nebula project being a particularly successful example. However, the full potential of the SHS has been hampered by lack of a clear route to acceptable flux calibration from the base photographic data. We have determined the calibration factors for 170 individual SHS fields, and present a direct pathway to the measurement of integrated Ha fluxes and surface brightnesses for resolved nebulae detected in the SHS.We also include a catalogue of integrated Hα fluxes for >100 planetary and other nebulae measured from the SHS, and use these data to show that fluxes, accurate to ±0.10-0.14 dex (~25-35 per cent), can be obtained from these fields. For the remaining 63 fields, a mean calibration factor of 12.0 counts pixel-1 R-1 can be used, allowing the determination of reasonable integrated fluxes accurate to better than ±0.2 dex (~50 per cent). We outline the procedures involved and the caveats that need to be appreciated in achieving such flux measurements. This paper forms a handy reference source that will significantly increase the scientific utility of the SHS. © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.-
dc.languageeng-
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society-
dc.subjectTechniques-
dc.subjectMiscellaneous-ISM-
dc.subjectGeneral -HII regions-planetary nebulae-
dc.subjectPhotometric-astronomical data bases-
dc.subjectSupernova remnants-
dc.subjectGeneral-ISM-
dc.titleFlux calibration of the AAO/UKST superCOSMOS Hα survey-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1093/mnras/stt1986-
dc.identifier.scopuseid_2-s2.0-84898991385-
dc.identifier.volume440-
dc.identifier.issue2-
dc.identifier.spage1080-
dc.identifier.epage1094-
dc.identifier.eissn1365-2966-

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