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Abstract

As we have noted before, the WG-IR was created following a Joint Commission Meeting at the IAU General Assembly in Baltimore in 1988, a meeting that provided both diagnosis and prescription for the perceived ailments of infrared photometry at the time. The results were summarized in Milone (1989). The challenges involve how to explain the failure to systematically achieve the milli-magnitude precision expected of infrared photometry and an apparent 3% limit on system transformability. The proposed solution was to re-define the broadband Johnson system, the passbands of which had proven so unsatisfactory that over time effectively different systems proliferated although bearing the same JHKLMNQ designations; the new system needed to be better positioned and centered in the atmospheric windows of the Earth's atmosphere, and the variable water vapour content of the atmosphere needed to be measured in real time to better correct for atmospheric extinction.

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      DIVISION IX / COMMISSION 25 / WORKING GROUP INFRARED ASTRONOMY
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Copyright
References
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Landolt A. 1992, AJ, 104, 340
Milone 1989, in: Milone E. F. (ed.), Infrared Extinction and Standardization, Proc. Two Sessions of IAU Commissions 25 and 9, Baltimore, MD, USA, 4 August 1988, Lecture Notes in Physics, 341, 1
Milone E. F. & Young A. T. 2005, PASP, 117, 485
Milone E. F. & Young A. T. 2007, in: Sterken C. (ed.), The Future of Photometric, Spectrophotometric, and Polarimetric Standardization, ASP-CS, 364, 387
Milone E. F. & Young A. T. 2008, JRASC, 36, in press
Salas L., Cruz-González I., & Tapia M. 2006, RMAA, 42, 273
Simons D. A. & Tokunaga A. T. 2002, PASP, 114, 169
Tokunaga A. T. & Vacca W.D. 2007, in: Sterken C. (ed.), The Future of Photometric, Spectrophotometric, and Polarimetric Standardization, ASP-CS, 364, 409
Tokunaga A. T., Simons D. A., & Vacca W. D. 2002, PASP, 114, 180
Young A. T., Milone E. F., & Stagg C. R. 1993, in: Butler C. J. & Elliott I. (eds.), Stellar Photometry – Current Techniques and Future Developments, Proc. IAU Coll. No. 136 (Cambridge: CUP), p. 235
Young A. T., Milone E. F., & Stagg C. R. 1994, A&AS, 105, 259
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Proceedings of the International Astronomical Union
  • ISSN: 1743-9213
  • EISSN: 1743-9221
  • URL: /core/journals/proceedings-of-the-international-astronomical-union
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