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# Data for "Diffraction-limited integral-field spectroscopy for extreme adaptive-optics systems with the Multi-Core fiber-fed Integral-Field Unit"

Preferred citation (DataCite format):  

  Haffert, Sebastiaan; Harris, Robert J.; Zanutta, Alessio; Pike, Fraser A.; Bianco, Andrea; Redaelli, Eduardo; et al. (2020).
  Data for "Diffraction-limited integral-field spectroscopy for extreme adaptive-optics systems with the Multi-Core fiber-fed Integral-Field Unit".
  University of Arizona Research Data Repository.
  Dataset. https://doi.org/10.25422/azu.data.12857885


Corresponding Author:   
  Sebastiaan Haffert, University of Arizona, shaffert@email.arizona.edu


License:
  CC BY 4.0


DOI:
  https://doi.org/10.25422/azu.data.12857885



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## Summary

Direct imaging instruments have the spatial resolution to resolve exoplanets
from their host star. This enables direct characterization of the exoplanet’s
atmosphere, but most direct imaging instruments do not have spectrographs with
high enough spectral resolving power for detailed atmospheric
characterization. We used recent advances in photonic manufacturing to create
the Multi-Core fiber-fed Integral-Field Unit (MCIFU), a novel integral-field
spectrograph for telescopes that have adaptive optics systems. The data set is
a collection of data files from the MCIFU project that were used to validate
and measure the performance of the MCIFU, both in the lab and on-sky. The on-
sky data was taken with the adaptive optics instrument CANARY at the 4.2m
William Herschel Telescope on the Canary Islands in July 2019. The data that
is collected here was used to create the figures in the draft "Diffraction-
limited integral-field spectroscopy for extreme adaptive optics systems with
the Multi-Core fiber-fed Integral-Field Unit" that is under review in JATIS.



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## Files and Folders

### fiber_link_overview_figure.jpg : A mosaic of several pictures that highlight the different aspects of the novel MCIFU fiber link.
### schematic_overview_mcifu.pdf : Overview figure of the MCIFU spectrograph.

### data.zip : FITS files
 - high_dynamic_range_1550nm_laser_exposure.fits : The high-dynamic range image of a 1550 nm laser that was created from several measurements with varying exposure times.
 - stacked_observations_vega.fits : The 1 hour integrated integral-field spectra of Vega.
 - kr_lamp_data_cube.fits : The raw data of the spectral calibration lamp '6031 Krypton Lamp' from Oriel. This file contains 12 images which correspond to different camera positions.

### output_data.zip : ASCII files
 - end_to_end_system_throughput.csv : A spreadsheet containing the estimated throughput budget of all components of the MCIFU as function of wavelength.
 - reformatter_chrome_mask_straylight_data.txt : Measurements with and without the chrome mask to determined the amount of straylight blocking.
 - simulated_fiber_coupling_efficiency.txt : The simulated fiber coupling efficiency of the micro-lens design.
 - temporal_cube_on_sky_grid.txt : The spatial position of each fiber that was used for the temporal cubes in the files 'temporal_cube_psf_h_band_integral_controller.txt' and 'temporal_cube_psf_h_band_LQG_controller.txt'.
 - temporal_cube_psf_h_band_integral_controller.txt : The reconstructed PSF with the integral controller as function of time.
 - temporal_cube_psf_h_band_LQG_controller.txt : The reconstructed PSF with the LQG controller as function of time.
 - throughput_measurements_fiber_link.xlsx : The throughput measurements of the fiber-link with and without the micro-lens array.
 - vph_diffraction_efficiency_measurements.txt : Contains the measured diffraction efficiency of the multiplexed VPH grating and the corresponding wavelength.
 - vph_diffraction_efficiency_simulation.txt : Contains the simulated diffraction efficiency of the multiplexed VPH grating and the corresponding wavelength.