Astronomy and Astrophysics – Astronomy
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.5106t&link_type=abstract
American Astronomical Society Meeting 210, #51.06; Bulletin of the American Astronomical Society, Vol. 39, p.163
Astronomy and Astrophysics
Astronomy
Scientific paper
Pan-STARRS1 will soon be surveying more than 40 square degrees every night to a depth fainter than m = 24 in griz. This should uncover some 300 SN1a per month with a distribution which peaks at z=0.5 and extends to greater than z=0.8, and about 20 per month at z<0.3. In addition to providing more SN1a every month than the entire output of previous surveys, the daily cadence and exquisite photometric calibration should reduce the observational systematics far below that of previous surveys as well. We therefore expect to be able to offer constraints on dark energy which will reach the systematic limit of SN1a themselves. However, this work will be challenging because we will not be able to spectroscopically observe every candidate event, and therefore redshifts and identification will be done photometrically and statistically. We regard this as an opportunity to minimize some of the subtle biases which have been difficult to remove from conventional surveys, however. I will discuss our plans for the PS1 supernova project, and how it will inform how we use the full Pan-STARRS system with its factor of 10 increase in etendue over the prototype PS1.
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