Mission Overview
Measuring Young Stars in Space and Time (MYSST)
Primary Investigator: Dimitrios Gouliermis
HLSP Authors: Victor Ksoll, Elena Sabbi, Dimitrios Gouliermis, Ralf Klessen, Massimo Roberto, Jenna Ryon
Released: 2021-03-29
Updated: 2021-03-29
Primary Reference(s): Ksoll et al. 2021a
Citations: See ADS Statistics
Slideshow
MYSST Mosaic of N44
Two color composite image of the MYSST survey, including the reference fields, showing the observations in F555W and F814W in blue and green, respectively.
MYSST Color Magnitude Diagram
Optical color magnitude diagram of the MYSST photometric catalog.
Overview
The "Measuring Young Stars in Space and Time" (MYSST) project is a large, high spatial resolution, deep Hubble Space Telescope survey of the star forming complex N44 located in the Large Magellanic Cloud (LMC). Observing objects with masses as low as 0.09 M_sun (unreddened 1 Myr pre-main-sequence star), the project aims to draw a comprehensive picture of star formation on the scales of giant molecular clouds by quantifying the star formation history of N44 across space and in time. Observations were taken with the Advanced Camera for Surveys (Wide Field Channel) and the Wide Field Camera 3 (UVIS channel) in the broad band filters F555W and F814W, covering a field of view of approximately 12.2 x 14.7 arcmin^2 or 180 x 215 pc^2 at the distance of the LMC.
This archive comprises the primary science output of the survey, i.e. the MYSST photometric catalog and the mosaic images.
Data Products
The image mosaics have the following naming convention:
hlsp_mysst_hst_<ins>_n44_<filter>_v1.0_drc.fits
where:
- <ins> = Instrument and detected used, either "acs-wfc" or "wfc3-uvis".
- <filter> = Name of filter used, either "f555w" or "f814w".
The catalog file has this file name:
hlsp_mysst_hst_acs-wfc-wfc3-uvis_n44_f555w-f814w_v1.0_catalog.csv
The catalog has the following columns:
| Column Name | Description |
|---|---|
| ID |
MYSST coordinate-based name for object |
| x_px |
pixel coordinate X (pixels) in WFC3/UVIS reference image |
| y_px |
pixel coordinate Y (pixels) in WFC3/UVIS reference image |
| RA |
J2000 Right Ascension (degree) |
| Decl |
J2000 Declination (degree) |
| chi |
chi squared PSF fit quality for combined data |
| snr |
signal to noise ratio for combined data |
| shrp |
sharpness for combined data |
| rnd |
roundness for combined data |
| mjaxdir |
direction of major axis (if not round) for combined data |
| crwd |
crowding for combined data |
| type |
DOLPHOT object type (1=bright star, 2=faint, 3=elongated, 4=hot pixel, 5=extended) |
| f555w_mag |
magnitude in F555W (mag) |
| f555w_mag_err |
photometric error of F555W magnitude (mag) |
| f555w_chi |
chi_squared PSF fit quality |
| f555w_snr |
signal to noise ratio |
| f555w_shrp |
sharpness |
| f555w_rnd |
roundness |
| f555w_crwd |
crowding |
| f555w_flag |
photometry quality flag |
| f814w_mag |
magnitude in F814W (mag) |
| f814w_mag_err |
photometric error of F814W magnitude (mag) |
| f814w_chi |
chi_squared PSF fit quality |
| f814w_snr |
signal to noise ratio |
| f814w_shrp |
sharpness |
| f814w_rnd |
roundness |
| f814w_crwd |
crowding |
| f814w_flag |
photometry quality flag |
| phot_orgn |
photometry origin flag
0: Aperture photometry used, without matching PSF GST source (176 stars) 1: Aperture photometry used, with matching PSF GST source (750 stars) 2: PSF photometry, aperture blended (360 stars) 3: PSF photometry, high S/N but no aperture detection (77 stars) 4: PSF photometry, low S/N (460,321 stars) |
Data file types:
| _drc.fits | Drizzled, science mosaic for a single filter and instrument+detector. |
| _catalog.csv | Catalog of sources. |
Data Access
| File | Approximate Size |
|---|---|
| F555W ACS-WFC DRC | 4.2 GB |
| F555W WFC3-UVIS DRC | 6.5 GB |
| F814W ACS-WFC DRC | 4.2 GB |
| F814W WFC3-UVIS DRC | 6.5 GB |
| Source Catalog | 95 MB |