Absolute Spectrophotometric Calibration to 1% from the FUV through the near-IR

Details Absolute Spectrophotometric Calibration to 1% from the FUV through the near-IR Absolute Spectrophotometric Calibration to 1% from the FUV through the near-IR

Jul 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005hst..prop10654f&link_type=abstract

HST Proposal ID #10654

Physics

Hst Proposal Id #10654 Cosmology

Scientific paper

We propose a significant improvement to the existing HST calibration. The current calibration is based on three primary DA white dwarf standards, GD 71, GD 153, and G 191-B2B. The standard fluxes are calculated using NLTE models, with effective temperatures and gravities that were derived from Balmer line fits using LTE models. We propose to improve the accuracy and internal consistency of the calibration by deriving corrected effective temperatures and gravities based on fitting the observed line profiles with updated NLTE models, and including the fit results from multiple STIS spectra, rather than the {usually} 1 or 2 ground-based spectra used previously. We will also determine the fluxes for 5 new, fainter primary or secondary standards, extending the standard V magnitude lower limit from 13.4 to 16.5, and extending the wavelength coverage from 0.1 to 2.5 micron. The goal is to achieve an overall flux accuracy of 1%, which will be needed, for example, for the upcoming supernova survey missions to measure the equation of state of the dark energy that is accelerating the expansion of the universe.

Affiliated with

Also associated with

No associations

Rating

Absolute Spectrophotometric Calibration to 1% from the FUV through the near-IR does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Absolute Spectrophotometric Calibration to 1% from the FUV through the near-IR, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Absolute Spectrophotometric Calibration to 1% from the FUV through the near-IR will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1250448