Absolute stellar photometry is based on 1970s terrestrial measurements of the star Vega referenced against the Cu fixed-point blackbody. Significant advances in absolute radiometry have been made in the last 30 years that offer the potential to improve both terrestrial and space-based absolute stellar photometry. These advances include new high-temperature blackbody standards, absolute cryogenic radiometry, solid-state optical radiation sources, improved atmospheric transmittance modeling, and laser-based radiometric calibration. We will assess the impact of these new technologies on stellar photometry, including present efforts to achieve highly accurate measurements from the ultraviolet to the near infrared for cosmological applications.
Proceedings Title: SPIE | 2007 |
Conference Dates: August 26-30, 2007
Conference Title: SPIE Proceedings--The International Society for Optical Engineering
Pub Type: Conferences
calibration, lasers, stars, telescopes