JWST program 2640 — NIRSpec MSA spectra of Westerlund 2

131 MSA sources, observation 001. All have a CLEAR/PRISM spectrum (0.6–5.3 μm, R~100); 47 also have G140M/F100LP (0.97–1.84 μm) and G395M/F290LP (2.87–5.10 μm) at R~1000. No G235M for this program -- see NIRSpec_2640_Spectra.py. Level-3 products from this project's own mastDownload/JWST/.

Interactive

Sky map

Aladin Lite over a wd2 NIRCam HiPS, with the real MSA shutter footprints. Hover for a spectrum preview, click for every figure and file for that source.

Zoomable spectra

Pan and zoom each 0.6-5.3 um spectrum. Detected lines are labelled per source; the full H2 / H I / He I / [Fe II] catalog can be overlaid. Line detections use R=1000 for the 47 sources with medium gratings and R~100 for the 84 PRISM-only sources.

Color-color and color-magnitude

Five CCDs and five CMDs over the wd2 photometry catalog as a static density background, with each spectroscopic source drawn twice: catalog photometry and photometry synthesized from its own spectrum.

Galleries

Position-wavelength

Spatial vs wavelength from the L3 s2d products, one panel per grating (PRISM, and G140M/G395M where available).

131 figures

SEDs and cutouts

Per-filter NIRCam cutouts and the catalog SED for each source.

131 figures

Spectrum gallery

Static spectrum plots with NIRCam filter transmission overlaid.

131 + 131 figures

Figures

Tables

nirspec_2640_ice_lines.ecsvH2O / CO2 / OCN- / CO ice band depths and column densities, with the CO gas-vs-ice classification.
nirspec_2640_line_detections.ecsvH2, H I, He I and [Fe II] line measurements, with blend, ice-band and resolving-power flags (see NIRSpec_2640_LineID.py).
nirspec_2640_synthphot.ecsvPhotometry synthesized from each spectrum, matched to the wd2 catalog.
nirspec_2640_slits.ecsvMSA shutter corners and dither footprint per source.
nirspec_2640_sources.ecsvSource positions and the products belonging to each.

Directories

linefits/Per-source ice-band continuum and optical-depth diagnostics.
pv/L3 position-wavelength figures.
specdata/One compact JSON spectrum per source, plus the line list.
sed_figures/SED + cutout figures.
../mastDownload/JWST/Level-3 x1d, s2d and crf products (jw02640-o001_s*_nirspec_*/), shared with the rest of this data-only project directory.

Observations at MAST

obs	sources	L3	at MAST
o001	131	131	Portal · Search UI 131 sources, PRISM/CLEAR (all) + G140M/F100LP + G395M/F290LP (47)

Program 2640 at STScI. The MAST Portal and Search UI are single-page apps, so the per-observation links below open the archive but were not verified to arrive pre-filtered. This query does not depend on that:

from astroquery.mast import Observations
obstable = Observations.query_criteria(project='JWST', instrument_name='NIRSpec*',
                                       proposal_id=2640)
products = Observations.filter_products(
    Observations.get_product_list(obstable),
    productType=["SCIENCE"], extension='fits', calib_level=[3, 4])
Observations.download_products(products)

Ice band depths are lower limits for the deeply embedded sources, whose bands absorb to the noise floor — see the _limit column. Line identifications exclude blends, ice-band absorption and (for the 47 sources with medium-resolution coverage) the grating-overlap zones; the flags are in the table if you want a different cut. 84 of 131 sources have PRISM only (R~100); line and ice-band measurements for those use a different resolving power than the 47 with G140M/G395M — see NIRSpec_2640_LineID.py's docstring. Details in README.md.