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NEID and EXPRES SOLAR DATA

NEID and EXPRES solar RV data are available. The NEID solar data is available with Engineering, Level 0, Level1, and Level2 data products. The EXPRES solar data is available with Level 1 and Level 2 data products. All solar data are public and visible to all users.

• Solar Search Form
• PyNEID
• NEID Data Reduction Pipeline
• EXPRES Reference Documents
• NEID Acknowledgements
• EXPRES Acknowledgements
• NEID Pyrheliometer Data

SOLAR SEARCH FORM

• Instrument: Select EXPRES and/or NEID
• Observation date (UTC): a calendar widget provides shortcuts to useful date ranges, or custom date ranges may be entered in mm/dd/yyyy format
• Data level: Select which level(s) you wish to search on (Engineering, Level 0, Level 1, Level 2, or All)

The results of the search are displayed in an interactive table below the search form. Columns may be sorted, filtered, or hidden using the icons at the top of the table. Hover over the filter box to see the options for column filtering.

To download an individual file, click on the file name. Click on the "Create script to download files" button to generate a script containing wget commands to download all the files you have access to. If you have filtered the results table, only the visible rows will be included in the download.

COLUMN DESCRIPTIONS

• filename: name of the Engineering, Level 0, Level 1, or Level 2 FITS file. For Level 0, all metadata, including the filename, are public, but you will only see a link to the file if you have permission to access that program or the data are public.
• instrument: NEID or EXPRES
• obsdate: date of observation in YYYY-MM-DD HH:MM:SS (UTC)
• exptime: exposure time in seconds
• obsmode: observing mode (NEID only: hr = high resolution, he = high efficiency)
• obstype: obervation type (Cal = Calibration, Sci = Science, Eng = Engineering)
• program: NEID = NOAO proposal ID, EXPRES = "EXPRESSOLAR"
• sunagl (NEID only: L1 and L2): elevation of the sun at the time of observation
• seeing (NEID only: L1 and L2): seeing in arcsec
• swversion (L1 and L2): pipeline version used to process the data
• extsnr (L1 and L2): measured signal-to-noise (SNR) per pixel at the wavelength specified in the observation request. If no wavelength is specified then the SNR is calculated at 5530 Angstroms
• ccfjdsum (L2): Barycentric Julian Day (BJD)
• ccfrvmod (L2): RV value in km/s
• dvrms (L2): error in RV value
• flagged (NEID only: L1 and L2); ('1' = flagged, '0' = not flagged) Files did not pass quality control. Derived products may not be good for precision radial velocity work but may be useful for other science cases

PYNEID

Programmatic access to the tables of metadata and associated data products is provided via the PyNEID Python package. Documentation is available here. Note the built-in search functions are only available for NEID data at this time, but EXPRES functions will be added later. EXPRES data may be searched via the ADQL functions.

NEID DATA REDUCTION PIPELINE

Documentation for the NEID Data Reduction Pipeline is available here.

EXPRES REFERENCE DOCUMENTS

• EXPRES: Jurgenson, C., Fischer, D., McCracken, T., Sawyer, D., Szymkowiak, A., Davis, A., Muller, G., and Santoro, F., "EXPRES: a next generation RV spectrograph in the search for earth-like worlds," Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 99086T (9 August 2016)
• Solar Telescope: Llama, J., Zhao, L. L., Brewer, J. M., Szymkowiak, A., Fischer, D. A., Collins, M., Tiegs, J., and Cornelius, F., "The Lowell Observatory Solar Telescope: a fiber feed into the Extreme Precision Spectrometer," Proc. SPIE 13094, Ground-based and Airborne Telescopes X, 130942O (11 September 2024)
• LDT: Levine, S. E. and DeGroff, W. T., "Status and imaging performance of Lowell Observatory's Discovery Channel Telescope in its first year of full science operations," Proc. SPIE 9906, Ground-based and Airborne Telescopes VI, 990621 (8 August 2016)
• EXPRES Pipeline: Petersburg, R. R., Ong, J. M. J., Zhao, L. L., Blackman, R. T., Brewer, J. M., Buchhave, L. A., Cabot, S. H. C., Davis, A. B., Jurgenson, C. A., Leet, C., McCracken, T. M., Sawyer, D., Sharov, M., Tronsgaard, R., Szymkowiak, A. E., and Fischer, D. A., "An Extreme-precision Radial-velocity Pipeline: First Radial Velocities from EXPRES," The Astronomical Journal, 159, 187 (2020)
• SELENITE Telluric Modeling: Leet, C., Fischer, D. A., and Valenti, J. A., "Toward a Self-calibrating, Empirical, Light-weight Model for Tellurics in High-resolution Spectra," The Astronomical Journal, 157, 187 (2019)
• Interface Control Document: EXPRES_Solar_ICD_v0.1.pdf

NEID ACKNOWLEDGEMENTS

If you use NEID data in a publication, please include the following acknowledgement:

"This paper contains data taken with the NEID instrument, which was funded by the NASA-NSF Exoplanet Observational Research (NN-EXPLORE) partnership and built by Pennsylvania State University. NEID is installed on the WIYN telescope, which is operated by the National Optical Astronomy Observatory, and the NEID archive is operated by the NASA Exoplanet Science Institute at the California Institute of Technology. NN-EXPLORE is managed by the Jet Propulsion Laboratory, California Institute of Technology under contract with the National Aeronautics and Space Administration."

EXPRES ACKNOWLEDGEMENTS

If you use EXPRES data in a publication, please include the following acknowledgement:

"This work used the EXtreme PREcision Spectrograph (EXPRES) that was designed and commissioned at Yale with financial support by the U.S. National Science Foundation under MRI-1429365 and ATI-1509436 (PI D. Fischer). This work used The Lowell Observatory Solar Telescope (LOST) that was funded in-part by the Mt. Cuba Astronomical Foundation and the Lowell Observatory Donor Opportunity Network."