OIFITS 2: the 2nd version of the data exchange standard for optical interferometry
Abstract
This paper describes version 2 of the Optical Interferometry exchange Format (OIFITS), the standard for exchanging calibrated data from optical (visible or infrared) interferometers. This IAU-endorsed standard has been in use for 10 years at most of the past and current optical interferometer projects, including COAST, NPOI, IOTA, CHARA, VLTI, PTI and the Keck interferometer. Software is available for reading, writing and merging OIFITS files. This version 2 provides definitions of additional data tables (for example for polarisation measurements), addressing the needs of future interferometric instruments. Also included are data columns for a more rigorous description of measurement errors and their correlations. In that, this document is a step towards the design of a common data model for optical interferometry. Finally, the main OIFITS header is expanded with several new keywords summarising the content to allow doing data base searches.
We request that comments and suggestions related to OIFITS be directed to the OLBIN email list. (See http://www.jmmc.fr/olbin-forum for information on how to subscribe and post to the list.)- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- January 2017
- DOI:
- 10.1051/0004-6361/201526405
- arXiv:
- arXiv:1510.04556
- Bibcode:
- 2017A&A...597A...8D
- Keywords:
-
- virtual observatory tools;
- standards;
- techniques: interferometric;
- instrumentation: interferometers;
- techniques: image processing;
- methods: data analysis;
- Astrophysics - Instrumentation and Methods for Astrophysics
- E-Print:
- This is a normative document, intended to be versioned here on ArXiv. This is version #5: length of TARGET and SPECTYP in OI_TARGET are now 32, with lesser lengths accepted but ideally triggering a warning upon reading. The exemple value for the main header's keyword REFERENC has been changed and is now the ADS bibcode of the published version of this paper