Mission Overview

Physics at High Angular resolution in Nearby GalaxieS ("PHANGS-HST")

 

Primary Investigator: Janice C. Lee

HLSP Authors: Leonardo Ubeda, Brad Whitmore, Dave Thilker, Janice C. Lee, Richard White, Gagandeep Anand, Stephen Hannon

Released: 2021-01-11

Updated: 2021-08-09

Primary Reference(s): Lee et al. 2021

DOI: 10.17909/t9-r08f-dq31

Citations: See ADS Statistics

Read Me

Source Data:

 
NGC 4298 Mosaic
NGC 4298 Mosaic

Color composites of PHANGS-HST imaging (Red: WFC3/UVIS F814W, Green: WFC3/UVIS F555W, Blue: WFC3/UVIS F438W+F336W+F275W) by Judy Schmidt.

NGC 1365 Mosaic
NGC 1365 Mosaic

Color composites of PHANGS-HST imaging (Red: WFC3/UVIS F814W, Green: WFC3/UVIS F555W, Blue: WFC3/UVIS F438W+F336W+F275W) by Judy Schmidt.

NGC 4571 Mosaic
NGC 4571 Mosaic

Color composites of PHANGS-HST imaging (Red: WFC3/UVIS F814W, Green: WFC3/UVIS F555W, Blue: WFC3/UVIS F438W+F336W+F275W) by Judy Schmidt.

NGC 4548 Mosaic
NGC 4548 Mosaic

Color composites of PHANGS-HST imaging (Red: WFC3/UVIS F814W, Green: WFC3/UVIS F555W, Blue: WFC3/UVIS F438W+F336W+F275W) by Judy Schmidt.

NGC 1317 Mosaic
NGC 1317 Mosaic

Color composites of PHANGS-HST imaging (Red: WFC3/UVIS F814W, Green: WFC3/UVIS F555W, Blue: WFC3/UVIS F438W+F336W+F275W) by Judy Schmidt.

NGC 4254 Mosaic
NGC 4254 Mosaic

Color composites of PHANGS-HST imaging (Red: WFC3/UVIS F814W, Green: WFC3/UVIS F555W, Blue: WFC3/UVIS F438W+F336W+F275W) by Judy Schmidt.

Overview

The PHANGS program is building the first dataset to enable the multi-phase, multi-scale study of star formation across nearby spiral galaxies, by combining Atacama Large Millimeter/submillimeterArray (ALMA) CO(2-1) mapping, Very Large Telescope/Multi Unit Spectroscopic Explorer (VLT/MUSE) optical spectroscopy, and Hubble Space Telescope (HST) UV-optical imaging.  Here, the team provides data products from the PHANGS-HST Treasury survey, which is obtaining five band NUV-U-B-V-I imaging of the disks of 38 spiral galaxies at distances of 4-23 Mpc, and parallel V and I band imaging of their halos, to provide a census of tens of thousands of compact star clusters and associations.  The combination of HST, ALMA, and VLT/MUSE observations will yield an unprecedented joint catalog of the observed and physical properties of ~100,000 star clusters, associations, HII regions, and molecular clouds.

Complementary PHANGS Data From ALMA

30 April 2021: Associated ALMA data are now publicly available though the PHANGS CANFAR site.

Data Release 1 (Jan. 11, 2021)

Provides the following image products for observations in the NUV-U-B-V-I bands for 29 out of 38 PHANGS-HST galaxies:

  • FLC FITS file for each exposure with astrometric solutions updated based on GAIA DR2 sources.
  • Combined DRC FITS images of individual pointings in each filter, each drizzled onto a common pixel grid defined for the galaxy target, also with astrometric solutions based on calibration to GAIA DR2 sources.
  • Mosaicked DRC FITS images in each filter for 6 galaxies covered by multiple pointings (NGC 628, NGC 1300, NGC 1672, NGC 3351, NGC 3627, NGC 4321).
  • ERR and EXP weight FITS images for individual pointings as well as mosaics.

Data Release 2 (August 09, 2021)

Completes the image product release for the full PHANGS-HST sample.  It also provides convolutional neural network (CNN) models trained with deep transfer learning, for the classification of star clusters, and a sample Jupyter Python notebook that demonstrates how to use these models.  NOTE: the notebook is delivered by the PHANGS-HST team, provided by MAST "as-is", MAST does not assume responsibility for the long-term maintenance of this notebook.  Models with two different architectures, ResNet18 and VGG19-BN, along with the tutorial notebook, can be accessed in the Data Access section below. 

Footprint Gallery

Below you can find a DSS image gallery of the PHANGS-HST galaxies with footprints from HST (blue), ALMA (red), and MUSE (cyan, available for 19/38 galaxies).

PHANGS-HST Sample 1

 

PHANGS-HST Sample 2

 

PHANGS-HST Sample 3

 

 

Data Products

The "_err_drc_wht.fits" images are inverse variance maps incorporating contributions from the detector and the Poisson noise from the astrophysical scene, modulated by the number of integrations ("flc" images) drizzling into an output pixel and the effective exposure depth after masking, respectively.  The "_exp_drc_wht.fits" images contain the effective drizzled exposure time per pixel in units of seconds.

The drizzled science and weight files have the following naming convention:

hlsp_phangs-hst_hst_<ins>_<target>_<filter>_v1_<etype>-drc-<type>.fits

where:

  • <ins> = Name of instrument, either "wfc3-uvis" or "wfc-acs".
  • <target> = Name of galaxy, e.g., "ngc1566", if a mosaic, will include "mosaic" after the galaxy name, e.g., "ngc1300mosaic".
  • <filter> = Name of filter used, e.g., "f275w".
  • <etype> = Either "exp" or "err", depending on the type of map.
  • <type> = Type of image, either "sci" for science or "wht" for weight.

The individual calibrated, flat-field images have the following naming convention:

hlsp_phangs-hst_hst_<ins>_<target>-<id>_<filter>_v1_flc.fits

where:

  • <ins> = Name of instrument, either "wfc3-uvis" or "wfc-acs".
  • <target> = Name of galaxy, e.g., "ngc1566", if a mosaic, will include "mosaic" after the galaxy name, e.g., "ngc1300mosaic".
  • <id> = HST ID of the observation, e.g., icdm17kcq.
  • <filter> = Name of filter used, e.g., "f275w".

A set of 10 convolutional neural network models for cluster classification are stored in .tar bundles with the following naming convention:

hlsp_phangs-hst_hst_model_<type>_multi_v1_bundle.tar

where:

  • <type> = Type of convolutional neural network architecture, one of "resnet" for ResNet18 or "vgg" for VGG19-BN.

Data file types:

_exp-drc-sci.fits

Drizzled science image.

_exp-drc-wht.fits

Exposure time maps.
_err-drc-wht.fits Inverse variance maps.

_flc.fits

Individual calibrated, flat-fielded image.
_bundle.tar Collection of CCN models of a given architecture.

Data Access

Convolutional Neural Network Models And Turorial For Cluster Classification

Note: The Jupyter Python notebook was made available as received from the PHANGS-HST team.  MAST is not responsible for the long-term maintenance of this notebook tutorial.

ResNet18 Architecture (~894 MB) VGG19-BN Architecture (~11 GB) Notebook Tutorial
hlsp_phangs-hst_hst_model_resnet_multi_v1_bundle.tar hlsp_phangs-hst_hst_model_vgg_multi_v1_bundle.tar hlsp_phangs-hst_hst_model_any_multi_v1_starcluster-classification.ipynb

HST Image Products

Note: Each "bundle" (a .tar.gz file) in the Image Links column is ~1-4 GB in size.

Footprints Multi-Telescope
Footprints
Galaxy R.A.
(deg.)
Dec.
(deg.)
Distance
(Mpc)
Image
Links
IC 1954 52.880792 -51.904833 12.8 Drizzled Bundle
FLC Bundle
Interactive Display

IC 5332 353.614542 -36.101083 9.01 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 1087 41.604833 -0.498639 15.85 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 1097-mosaic 41.579375 -30.274889 13.58 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 1097-n 41.579375 -30.274889 13.58 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 1097-s 41.579375 -30.274889 13.58 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 1300-e 49.921167 -19.411361 18.99 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 1300-mosaic 49.921167 -19.411361 18.99 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 1300-w 49.921167 -19.411361 18.99 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 1317 50.684542 -37.103694 19.11 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 1365 53.401542 -36.140389 19.57 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 1385 54.370208 -24.500306 17.22 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 1433 55.506458 -47.222083 18.63 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 1512-c 60.976167 -43.348861 18.83 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 1512-mosaic 60.976167 -43.348861 18.83 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 1512sw1 60.976167 -43.348861 18.83 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 1512sw2 60.976167 -43.348861 18.83 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 1559 64.399042 -62.783667 19.44 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 1566 65.001750 -54.937806 17.69 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 1672-mosaic 71.427083 -59.247194 19.4 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 1792 76.310208 -37.980750 16.2 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 2775 137.583833 7.037944 23.15 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 2835 139.470458 -22.354667 12.22 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 2903-mosaic 143.042125 21.500833 10.0 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 2903-n 143.042125 21.500833 10.0 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 2903-s 143.042125 21.500833 10.0 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 3351-mosaic 160.990417 11.703806 9.96 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 3621-mosaic 169.568792 -32.814056 7.06 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 3621-n 169.568792 -32.814056 7.06 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 3621-s 169.568792 -32.814056 7.06 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 3627-mosaic 170.062333 12.991528 11.32 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 3627-n 170.062333 12.991528 11.32 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 3627-s 170.062333 12.991528 11.32 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 4254-e 184.706667 14.416500 13.1 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 4254-mosaic 184.706667 14.416500 13.1 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 4254-w 184.706667 14.416500 13.1 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 4298 185.386500 14.606167 14.92 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 4303 185.478750 4.473639 16.99 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 4321-c 185.728458 15.821806 15.21 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 4321-e 185.728458 15.821806 15.21 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 4321-mosaic 185.728458 15.821806 15.21 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 4535 188.584625 8.197750 15.77 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 4536-e 188.612708 2.188139 16.25 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 4536-mosaic 188.612708 2.188139 16.25 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 4536-w 188.612708 2.188139 16.25 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 4548 188.860208 14.496333 16.22 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 4569 189.207458 13.162944 15.76 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 4571 189.234917 14.217361 14.9 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 4654 190.985750 13.126667 21.98 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 4689 191.939833 13.762806 15.0 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 4826 194.181833 21.682972 4.41 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 5068-mosaic 199.728375 -21.039111 5.20 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 5068-n 199.728375 -21.039111 5.20 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 5068-s 199.728375 -21.039111 5.20 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 5248 204.383417 8.885167 14.87 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 628-c 24.173958 15.783667 9.84 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 628-e 24.173958 15.783667 9.84 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 628-mosaic 24.173958 15.783667 9.84 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 6744-c 287.442083 -63.857528 9.39 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 6744-mosaic 287.442083 -63.857528 9.39 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 6744-n 287.442083 -63.857528 9.39 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 6744-s 287.442083 -63.857528 9.39 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 685 26.928375 -52.761806 19.94 Drizzled Bundle
FLC Bundle
Interactive Display

NGC 7496 347.447042 -43.427944 18.72 Drizzled Bundle
FLC Bundle
Interactive Display

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