Journal article

The hubble space telescope key project on the extragalactic distance scale. XXII. The discovery of cepheids in NGC 1326A

CF Prosser, RC Kennicutt, F Bresolin, A Saha, S Sakai, WL Freedman, JR Mould, L Ferrarese, HC Ford, BK Gibson, JA Graham, JG Hoessel, JP Huchra, SM Hughes, GD Illingworth, DD Kelson, L Macri, BF Madore, NA Silbermann, PB Stetson

The Astrophysical Journal | Published : 1999

Abstract

We report on the detection of Cepheids and the first distance measurement to the spiral galaxy NGC 1326A, a member of the Fornax Cluster of galaxies. We have employed data obtained with the Wide Field and Planetary Camera 2 on board the Hubble Space Telescope. Over a 49 day interval, a total of 12 V-band (F555W) and eight I-band (F814W) epochs of observation were obtained. Two photometric reduction packages, ALLFRAME and DoPHOT, have been employed to obtain photometry measures from the three Wide Field CCDs. Variability analysis yields a total of 17 Cepheids in common with both photometry data sets, with periods ranging between 10 and 50 days. Of these, 14 Cepheids with high-quality light cu..

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