Mission Overview

Hubble Space Telescope Atlases of Cluster Kinematics (HACKS)

Primary Investigator: Mattia Libralato

HLSP AuthorsMattia Libralato

Released: 2022-06-22

Updated: 2024-04-05

Primary Reference(s): Libralato et al. 2022

DOI: 10.17909/jpfd-2m08

Citations: See ADS statistics

Read Me

Source Data:

 
alternate
Simulation of the internal motions of stars in the core of the globular cluster NGC 6656 based on the HACKS catalogs.

Overview

A number of studies based on data collected by the Hubble Space Telescope (HST) GO-13297 program “HST Legacy Survey of Galactic Globular Clusters: Shedding UV Light on Their Populations and Formation" have investigated the photometric properties of a large sample of Galactic globular clusters and revolutionized our understanding of their stellar populations. In this project, the authors expand previous studies by focusing on the stellar clusters’ internal kinematics. The authors computed proper motions for stars in 56 globular clusters and one open cluster by combining the GO-13297 images with archival HST data. The astro-photometric catalogs released with this paper represent the most complete and homogeneous collection of proper motions of stars in the cores of stellar clusters to date, and expand the information provided by the current (and future) Gaia data releases to much fainter stars and into the crowded central regions. At the dawn of a new era in astronomy with the first light of the James Webb Space Telescope (JWST), the legacy that these proper-motion catalogs offer is further enhanced, since they can serve as an important astrometric benchmark for JWST-based data reduction and tools.

Update 2024-04-05:  The WFC3/UVIS F814W photometry of the clusters NGC 1851, NGC 5904, NGC 5927, NGC 6341, NGC 6541, NGC 6656, NGC 6681, NGC 6752, NGC 6791, NGC 7078 showed an unexpected zero-point. The issue likely arose from the poor quality of the DRC-based, aperture-photometry catalogs used for the photometry registration on to the VEGAmag system. The team fixed the VEGAmag zero-point for all these catalogs except for NGC 5904, for which a small zero-point is still present.

Data Products

Photometric and proper motion catalogs are located in subdirectories called "catalogs/<cluster>". The photometric catalogs are named according to the following convention:

hlsp_hacks_hst_<inst>_<target>_<opt-elem>_v1.0_phot-catalog-<epoch>.<ext>

where:

  • <inst> is the HST instrument used for the observation, e.g., "acs-wfc", "acs-hrc", or "wfc3".
  • <target> is the target cluster.
  • <opt-elem> is the optical element used for the observation.
  • <epoch> is the observation epoch, one of "ep1", "ep2", "ep3 or "ep4". 
  • <ext> is the file extension, either ".fits" or ".txt"

Proper motion catalog files are named according to the following convention:

hlsp_hacks_hst_<inst>_<target>_multi_v1.0_pm-catalog.<ext>

where:

  • <inst> is the HST instrument used for the observation.
  • <target> is the target cluster.
  • <ext> is the file extension, either ".fits" or ".txt".

Velocity dispersion catalogs are named according to the following convention:

hlsp_hacks_hst_<inst>_<target>_multi_v1.0_vdisp.txt

where:

  • <inst> is the HST instrument used for the observation.
  • <target> is the target cluster, and includes "all" for a catalog for all clusters.

Data file types:

_phot-catalog photometric catalog
_pm-catalog proper motion catalog
_vdisp.txt velocity dispersions based on the propert motions

Data Access

A list of the observations used in the project is found here, and are appended to the Read Me file linked above. Entries marked with ‘*' corresponds to data sets not used in the computation of the proper motions. 

All data products are available in the following table. A file containing the velocity dispersion catalogs for all clusters is included at the bottom ("All").

Target Cluster Catalog Bundle Preview Velocity Dispersion
NGC0104 Catalogs NGC0104 Preview Velocity Dispersions
NGC0288 Catalogs NGC0288 Preview Velocity Dispersions
NGC0362 Catalogs NGC0362 Preview Velocity Dispersions
NGC1261 Catalogs NGC1261 Preview Velocity Dispersions
NGC1851 Catalogs NGC1851 Preview Velocity Dispersions
NGC2298 Catalogs NGC2298 Preview Velocity Dispersions
NGC2808 Catalogs NGC2808 Preview Velocity Dispersions
NGC3201 Catalogs NGC3201 Preview Velocity Dispersions
NGC4590 Catalogs NGC4590 Preview Velocity Dispersions
NGC4833 Catalogs NGC4833 Preview Velocity Dispersions
NGC5024 Catalogs NGC5024 Preview Velocity Dispersions
NGC5053 Catalogs NGC5053 Preview Velocity Dispersions
NGC5272 Catalogs NGC5272 Preview Velocity Dispersions
NGC5286 Catalogs NGC5286 Preview Velocity Dispersions
NGC5466 Catalogs NGC5466 Preview Velocity Dispersions
NGC5897 Catalogs NGC5897 Preview Velocity Dispersions
NGC5904 Catalogs NGC5904 Preview Velocity Dispersions
NGC5927 Catalogs NGC5927 Preview Velocity Dispersions
NGC5986 Catalogs NGC5986 Preview Velocity Dispersions
NGC6093 Catalogs NGC6093 Preview Velocity Dispersions
NGC6101 Catalogs NGC6101 Preview Velocity Dispersions
NGC6121 Catalogs NGC6121 Preview Velocity Dispersions
NGC6144 Catalogs NGC6144 Preview Velocity Dispersions
NGC6171 Catalogs NGC6171 Preview Velocity Dispersions
NGC6205 Catalogs NGC6205 Preview Velocity Dispersions
NGC6218 Catalogs NGC6218 Preview Velocity Dispersions
NGC6254 Catalogs NGC6254 Preview Velocity Dispersions
NGC6304 Catalogs NGC6304 Preview Velocity Dispersions
NGC6341 Catalogs NGC6341 Preview Velocity Dispersions
NGC6352 Catalogs NGC6352 Preview Velocity Dispersions
NGC6362 Catalogs NGC6362 Preview Velocity Dispersions
NGC6366 Catalogs NGC6366 Preview Velocity Dispersions
NGC6388 Catalogs NGC6388 Preview Velocity Dispersions
NGC6397 Catalogs NGC6397 Preview Velocity Dispersions
NGC6441 Catalogs NGC6441 Preview Velocity Dispersions
NGC6496 Catalogs NGC6496 Preview Velocity Dispersions
NGC6535 Catalogs NGC6535 Preview Velocity Dispersions
NGC6541 Catalogs NGC6541 Preview Velocity Dispersions
NGC6584 Catalogs NGC6584 Preview Velocity Dispersions
NGC6624 Catalogs NGC6624 Preview Velocity Dispersions
NGC6637 Catalogs NGC6637 Preview Velocity Dispersions
NGC6652 Catalogs NGC6652 Preview Velocity Dispersions
NGC6656 Catalogs NGC6656 Preview Velocity Dispersions
NGC6681 Catalogs NGC6681 Preview Velocity Dispersions
NGC6715 Catalogs NGC6715 Preview Velocity Dispersions
NGC6717 Catalogs NGC6717 Preview Velocity Dispersions
NGC6723 Catalogs NGC6723 Preview Velocity Dispersions
NGC6752 Catalogs NGC6752 Preview Velocity Dispersions
NGC6779 Catalogs NGC6779 Preview Velocity Dispersions
NGC6791 Catalogs NGC6791 Preview Velocity Dispersions
NGC6809 Catalogs NGC6809 Preview Velocity Dispersions
NGC6838 Catalogs NGC6838 Preview Velocity Dispersions
NGC6934 Catalogs NGC6934 Preview Velocity Dispersions
NGC6981 Catalogs NGC6981 Preview Velocity Dispersions
NGC7078 Catalogs NGC7078 Preview Velocity Dispersions
NGC7089 Catalogs NGC7089 Preview Velocity Dispersions
NGC7099 Catalogs NGC7099 Preview Velocity Dispersions
      All Velocity Dispersions

Citations

Please remember to cite the appropriate paper(s) below and the DOI if you use these data in a published work. 

Note: These HLSP data products are licensed for use under CC BY 4.0.

References