Cepheids in 3 host galaxies (Riess+, 2009)

Details Cepheids in 3 host galaxies (Riess+, 2009) Cepheids in 3 host galaxies (Riess+, 2009)

Mar 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010ycat..21830109r&link_type=abstract

VizieR On-line Data Catalog: J/ApJS/183/109. Originally published in: 2009ApJS..183..109R

Other

Photometry: Hst, Stars: Variable, Photometry: Vri

Scientific paper

In Cycle 14 (2005-2006, GO-10497), we observed NGC 1309 and NGC 3021 for 12 epochs of 4800s each with ACS WFC F555W using a power-law spacing of intervals designed to reduce period aliasing up to the full monitoring duration of 52d. We also observed each host at five epochs with F814W for 4800s each. In Cycle 15 (2006-2007, GO-10802), we reobserved NGC 1309 and NGC 3021, as well as the other four hosts at two epochs using ACS and F555W to constrain the phase of the Cepheid light curves for subsequent infrared (IR) observations with the Near-Infrared Camera and Multi-Object Spectrometer (NICMOS). For the four hosts with extensive ACS measurements, NGC 1309, NGC 3021, NGC 3370, and NGC 4258, the data from programs GO-9810, GO-9351, GO-10497, and GO-10802 were retrieved from the HST archive.
(5 data files).

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