J/A+A/710/A6 PDRs4ALL XX. Spectral stitching of MIRI cubes (Canin+, 2026)
PDRs4ALL XXI. Haute Couture:
Spectral stitching of JWST MIRI-IFU cubes with matrix completion.
Canin A., Fevotte C., Dobigeon N., Van De Putte D., Onaka T., Berne O.
<Astron. Astrophys. 710, A6 (2026)>
=2026A&A...710A...6C 2026A&A...710A...6C (SIMBAD/NED BibCode)
ADC_Keywords: Interstellar medium ; Interstellar medium ; Infrared
Keywords: methods: data analysis - methods: numerical -
techniques: image processing
Abstract:
The Mid-Infrared Instrument (MIRI) is the imager and spectrograph
covering wavelengths from 4.9 to 27.9um onboard the James Webb Space
Telescope (JWST). The MIRI Medium-Resolution Spectrometer (MRS)
consists of four integral field units (IFU) and two wheels with three
rotation settings producing four spectral channels and three spectral
sub-channels. The twelve resulting spectral data cubes have different
fields of view, spatial, and spectral resolutions. The wavelength
range of each cube partially overlaps with the neighboring bands, and
the overlap regions typically show flux mismatches which have to be
corrected by spectral stitching methods. Stitching methods aim to
produce a single data cube incorporating the data of the individual
sub-channels, which requires matching the spatial resolution and the
flux discrepancies. We present Haute Couture, a novel stitching
algorithm which uses non-negative matrix factorization (NMF) to
perform a matrix completion, where the available MRS data cubes are
treated as twelve sub-matrices of a larger incomplete matrix. Prior to
matrix completion, we also introduce a novel pre-processing to
homogenize the global intensities of the twelve cubes. Our
pre-processing consists in jointly optimizing a set of global scale
parameters that maximize the fit between the cubes where spectral
overlap occurs. We apply our novel stitching method to JWST data
obtained as part of the PDRs4All observing program of the Orion Bar,
and produce a uniform cube reconstructed with the best spatial
resolution over the full range of wavelengths.
Description:
JWST MIRI-MRS observations from the ERS program PDRs4All. This final
cube combines the 12 cubes using the Haute Couture method. The
parameters used are beta=1, K=6 and the MASS initialization. The
reconstruction is done in the channel 1-long spatial grid.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 93 1 Informations on datacube
fits/* . 1 Datacube
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See also:
J/A+A/685/A74 : PDRs4All III. JWST/NIR view of the Orion Bar (Peeters+, 2024)
J/A+A/685/A75 : PDRs4All IV. Orion Bar MRS template spectra (Chown+, 2024)
J/A+A/701/A111 : PDRs4All XVI. Orion Bar template spectra (Van De Putte+, 2025
Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 21 I2 --- Nx Number of pixels along X-axis
23- 24 I2 --- Ny Number of pixels along Y-axis
26- 30 I5 --- Nz Number of slices
32- 37 F6.4 um bWAVE Lower value of WAVE interval
39- 45 F7.4 um BWAVE Upper value of WAVE interval
47- 57 F11.9 um dWAVE WAVE resolution
59- 64 I6 Kibyte size Size of FITS file
66- 78 A13 --- FileName Name of FITS file, in subdirectory fits
80- 93 A14 --- Title Title of the FITS file
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Acknowledgements:
Amelie Canin, amelie.canin(at)cnrs.fr
References:
Berne et al., Paper I 2022PASP..134e4301B 2022PASP..134e4301B
Habart, et al., Paper II 2024A&A...685A..73H 2024A&A...685A..73H
Peeters et al., Paper III 2024A&A...685A..74P 2024A&A...685A..74P, Cat. J/A+A/685/A74
Chown et al., Paper IV 2024A&A...685A..75C 2024A&A...685A..75C, Cat. J/A+A/685/A75
Elyajouri et al., Paper V 2024A&A...685A..76E 2024A&A...685A..76E
Pasquini et al., Paper VI 2024A&A...685A..77P 2024A&A...685A..77P
Schroetter et al. Paper VII 2024A&A...685A..78S 2024A&A...685A..78S
Van De Putte et al., Paper VIII 2024A&A...687A..86V 2024A&A...687A..86V
Fuente et al., Paper IX 2024A&A...687A..87F 2024A&A...687A..87F
Goicoechea et al., Paper X 2024A&A...689L...4G 2024A&A...689L...4G
Zannese et al., Paper XI 2025A&A...696A..99Z 2025A&A...696A..99Z
Goicoechea et al., Paper XII 2025A&A...696A.100G 2025A&A...696A.100G
Chown et al., Paper XIIII 2025A&A...698A..86C 2025A&A...698A..86C
Khan et al., Paper XIV 2025A&A...699A.133K 2025A&A...699A.133K
Schroetter et al., Paper XV 2025A&A...699L..13S 2025A&A...699L..13S
Van De Putte et al., Paper XVI 2025A&A...701A.111V 2025A&A...701A.111V, Cat. J/A+A/701/A111
Zannese et al., Paper XVII 2026A&A...705A.128Z 2026A&A...705A.128Z
(End) Patricia Vannier [CDS] 25-Feb-2026