In this webpage we describe the Rocky Worlds DDT High Level Science Products (HLSP) published in MAST for the scientific community to explore.
These are stored as files in FITS and HDF5-based formats which offer self-describing, efficient, and portable designs, enabling broad accessibility across scientific computing languages and platforms.
The Rocky Worlds DDT data products are created with the following properties in mind. They should :
- Enable rapid and efficient follow-up of Rocky Worlds DDT targets.
- Facilitate science interpretation of results from the Rocky Worlds DDT targets by members of the scientific community.
- Motivate further study of the JWST data obtained by the Rocky Worlds DDT.
HST/STIS Spectra |
STIS observations of the host M dwarf provide measurements of the wings of the Lyman-alpha profile, the most post prominent UV line, as well as measurements in the blue-optical. |
HST/COS Spectra and Flare Monitoring |
COS observations capture the near- and far-UV output of the host M dwarf, as well as provide 12 orbits of flare monitoring in the FUV. Knowing the spectral UV output and flare rates can help determine rates of atmospheric mass loss and photochemical reaction in planetary atmospheres. |
For each host star, we provide extracted spectra where multiple orbits are combined and stitched together to provide a panchromatic spectrum from the far UV to the blue-optical. For the Ly-alpha line, we also provide a reconstruction of the intrinsic profile, which cannot be captured due to absorption by the ISM.
For all COS data obtained in TIME-TAG mode we produce time series. For the COS data we search the time series for flares that we identify by-eye. Flares are removed before producing the spectral HLSPs, and we additionally provide the broadband flare time series with a best-fit model in the HLSP.
The HST data products follow the naming convention:
hlsp_rocky-worlds_hst_stis_<target>_<filter>_<version>_<product>.fits
where:
<target> |
Name of the target, for example, "gj3929b" |
<filter> |
Name of the filter used for the observation |
<version> |
Version value of the data product |
<product> |
Type of data product, either "spec" (spectrum) or "lc" (light curve) |
JWST/MIRI 15 µm Lightcurves |
MIRI observations aim to capture the secondary eclipse of the exoplanet and measure its thermal emission to determine whether an atmosphere might be present. An eclipse lightcurve may be composed of more than one JWST exposure. |
For each observed secondary eclipse, we produce an HLSP containing the extracted light curve, a best-fit model to the eclipse and lightcurve systematics, and the cleaned lightcurve with the systematics component removed. These products allow researchers to explore the data at multiple levels of processing.
We also produce HLSPs combining multiple lightcurves of the same target. In these cases, the extracted lightcurves are fit simultaneously with a shared eclipse model and individual systematics models.
The JWST data products follow the naming convention:
hlsp_rocky-worlds_jwst_miri_<target>_<eclipse>_<filter>_<version>_<product>.<ext>
where:
<target> |
Name of the target, for example, "gj3929b" |
<eclipse> |
Identifier for the observation, for example, "ecl001" |
<filter> |
Name of the filter used for the observation |
<version> |
Version value of the data product |
<product> |
Type of data product, either "eclipse-cat" or "lc" |
<ext> |
File extension, either "fits" or "h5" |
All Rocky Worlds HLSPs are publicly available through the Mikulski Archive for Space Telescopes (MAST).
Researchers can:
- Search for specific datasets by target, instrument, or mission.
- Preview data and associated metadata before download.
- Download data in standard formats suitable for analysis with common astronomical tools.
To access the available data, you can download it either from the Rocky Worlds HLSP webpage, which in turn includes example code snippets to use these HLSPs or directly through the MAST archive.
