090605
June 6, 2009 on 3:09 am | In Uncategorized | Comments OffSpitzer reborn
http://www.spitzer.caltech.edu/Media/happenings/20090528/
after 5.5 yr, run out of coolant, two shortest-wavelength detectors continue to function normally
Refined Hubble Constant Narrows Possible Explanations for Dark Energy
http://hubblesite.org/newscenter/archive/releases/2009/08/full/
SHOES (Supernova H0 for the Equation of State), Riess, H0=74.2 ± 3.6
Hubble observations of Cepheid variables in a nearby cosmic mile marker, the galaxy NGC 4258, and in the host galaxies of recent supernovae, directly link these distance indicators.
Using Spectral Flux Ratios to Standardize SN Ia Luminosities
http://adsabs.harvard.edu/cgi-bin/bib_query?arXiv:0905.0340
the flux ratio R(642/443) = F(642 nm) / F(443 nm) has a correlation of 0.95 with SN Ia absolute magnitudes.
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