Mission Overview
Formation History of Ultra-Faint Dwarf Galaxies (FHUFD)
Primary Investigator: Tom Brown
HLSP Authors: Tom Brown
Released: 2018-01-24
Updated: 2018-01-24
Primary Reference(s): Brown et al. 2014
DOI: 10.17909/T99H5G
Citations: See ADS Statistics
Overview
The following proposals are relevant to this HSLP: HST Program 12549
FHUFD is a deep, high-precision, photometric survey of six ultra-faint dwarf galaxy satellites of the Milky Way, in order to discern any cosmologically-driven synchronization of their formation histories. For six ultra-faint dwarf satellites of the Milky Way (Bootes I, Coma Berenices, Canes Venatici II, Hercules, Leo IV, and Ursa Major I), the team provides ACS photometry, astrometry, and co-added (drizzled) images. The photometry and images are in two bands: F606W (broad V) and F814W (I), using the STMAG photometric system. The astrometry is given in equatorial coordinates (degrees, J2000). The drizzled images have a scale of 0.03 arcsec/pix. The images from each pointing are contained in their own FITS files. Each galaxy also has a single catalog file containing the point sources detected in the images.
Data Products
The drizzled images are stored as FITS files with the following naming convention:
hlsp_fhufd_hst_acs_<galaxy><##>_<filter>_v2.0_drz.fits
where:
- <galaxy> = name of the galaxy, e.g., "ursamajori"
- <##> = the pointing number, as a two-digit zero-padded integer
- <filter> = the filter used, either "f606w" or "f814w"
The source catalogs follow a similar naming convention, except there is no pointing number component, and the string "multi" is used instead of the filter. The extension for the source catalogs is "*cat.fits".
Data Access
| Field | R.A. (J2000) | Dec. (J2000) | Exptime F606W (sec) | F814W (sec) | Images | Catalogs |
|---|---|---|---|---|---|---|
| Bootes I | 14:00:04 | +14:30:47 | 2340 | 2200 | FITS Files | Source Catalog |
| Canes Venatici II | 12:57:10 | +34:19:23 | 20850 | 20850 | FITS Files | Source Catalog |
| Coma Berenices | 12:27:21 | +23:53:13 | 2340 | 2200 | FITS Files | Source Catalog |
| Hercules | 16:31:05 | +12:47:07 | 12880 | 12745 | FITS Files | Source Catalog |
| Leo IV | 11:32:57 | -00:31:00 | 20530 | 20530 | FITS Files | Source Catalog |
| Ursa Major I | 10:35:04 | +51:56:51 | 4215 | 3725 | FITS Files | Source Catalog |