Multi-star calibration in starphotometry

Abstract We explored the improvement in starphotometry accuracy using a multi-star Langley calibration in lieu of the more traditional one-star Langley approach. Our goal was a 0.01 calibration-constant repeatability accuracy, at an operational sea-level facility such as our Arctic site at Eureka. Multi-star calibration errors were systematically smaller than single-star errors and, in the mid-spectrum, approached the 0.01 target for an observing period of 2.5 h. Filtering out coarse-mode (supermicrometre) contributions appears mandatory for improvements. Spectral vignetting, likely linked to significant UV/blue spectrum errors at large air mass, may be due to a limiting field of view and/or sub-optimal telescope collimation. Starphotometer measurements acquired by instruments that have been designed to overcome such effects may improve future star magnitude catalogues and consequently starphotometry accuracy.

Object Details

• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch

References and Relationships

• Bibliographic citation: Multi-star calibration in starphotometry ; volume:16 ; number:24 ; year:2023 ; pages:6111-6121 ; extent:11 ; Atmospheric measurement techniques ; 16, Heft 24 (2023), 6111-6121 (gesamt 11)

Contributors, Places and Time

• Creator: Ivănescu, Liviu ; O'Neill, Norman T.

Further information

• DOI: 10.5194/amt-16-6111-2023
• URN: urn:nbn:de:101:1-2023122803174925467403
• Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 15.08.2025, 7:21 AM CEST