Measurement of q_0 from a High-Redshift Supernova and the Sources of Measurement Error

Details Measurement of q_0 from a High-Redshift Supernova and the Sources of Measurement Error Measurement of q_0 from a High-Redshift Supernova and the Sources of Measurement Error

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...182.0519p&link_type=abstract

American Astronomical Society, 182nd AAS Meeting, #05.19; Bulletin of the American Astronomical Society, Vol. 25, p.797

Astronomy and Astrophysics

Astronomy

Scientific paper

By comparing the photometry of a high-redshift Type Ia supernova to the nearby Type Ia magnitude distribution, we can measure the deceleration parameter q_0. We have studied the main sources of error in the distant-supernova photometry, in the nearby calibration, and in the comparison of the two. This leads to an estimate of the current q_0 measurement error and strategies to substantially improve the accuracy of this result. In particular, we will report the implications for q_0 of the analysis of Supernova 1992bi, which we discovered at z=0.458. Our current schedule of supernova searches and follow-up will allow us to address the main sources of error in q_0, since we will be using dozens of well-observed supernovae, both distant and nearby, in the calculation.

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