Description
The Panchromatic Hubble Andromeda Treasury is a Hubble Space Telescope Multi-cycle program to map roughly a third of M31’s star forming disk, using 6 filters covering from the ultraviolet through the near infrared. With HST’s resolution and sensitivity, the disk of M31 is resolved into more than 100 million stars, enabling a wide range of scientific endeavors.
The phat_v2.phot_mod table has been crossmatched against our default reference datasets within a 1.5 arcsec radius, nearest neighbor only. These tables will appear with x1p5 in their name in our table browser. Example: phat_v2.x1p5__phot_mod__gaia_dr3__gaia_source.
| PHAT at a Glance | |
|---|---|
| Area covered | 0.5 deg2 |
| Bands | F275W, F336W (WFC3/UVIS), F475W, F814W (ACS/WFC), F110W, F160W (WFC3/IR) |
| Depth (5σ, F275W,F336W,F475W,F814W,F110W,F160W) | 25.1, 24.8, 27.9, 27.1, 25.0, and 24.0 mag |
| Spatial resolution (F275W,F336W,F475W,F814W,F110W,F160W) | ~0.08,0.08,0.1,0.1,0.25,0.25 arcsec |
| Number of bricks | 23 |
| Number of objects | ~117,000,000 |
| Number of measurements | ~7,500,000,000 |
| Photometric precision | ~1% |
| Astrometric accuracy | ~5 mas |
Goals
- Star formation histories derived on 50-100 parsec scales
- Improved stellar evolution models, calibrated at UV through NIR wavelengths
- Well-defined catalogs of stellar clusters, at all ages
- Characterization of variations in the stellar mass function from ~3 to 30 solar masses
- Measurements of the mass function and age distributions of stellar clusters
- Maps of extinction from dust, and characterization of the extinction law
- Calibration of star formation indicators
- Age dating of supernova remnants
- Quantitative constraints on the coupling between star formation and the interstellar medium
- Identification and characterization of variable stars
- Kinematic decompositions of structural components
- Cross-identification of multi-wavelength sources and emission line objects
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Data Release
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Data Reduction
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