Hinode/EIS Solar Flare Footpoint Non-Thermal Velocity Dataset (2011–2024)

EIS Flare Catalog and Non-thermal Velocity (NTV) Curves Data This dataset contains non-thermal velocity (NTV) measurements from Hinode/EIS spectral lines during solar flares, organized by flare class and spectral line. It also includes a comprehensive flare catalog linking EIS observations to GOES flare events. Files: eis_flare_catalog_zenodo_release.csv - EIS flare catalog ntv_curves_normalized_for_zenodo.csv - Normalized NTV curves ntv_curves_raw_for_zenodo.csv - Raw (non-normalized) NTV curves Flare Catalog Structure (eis_flare_catalog_zenodo_release.csv) Each row corresponds to an EIS raster or exposure associated with a GOES flare. The catalog includes: Flare Timing and Classification: flare_peak, flare_start, flare_end, peak_time – Flare timing (GOES event list) subtracted_goes_class, recalibrated_goes_class, uncalibrated_goes_class – Flare classification based on different calibration schemes granular_flare_category – Simplified flare category (C1, C2–3, C>4, M, X) Flare Positioning: flare_hpcx, flare_hpcy – Helioprojective flare coordinates (arcsec) flare_hpcx_pixel, flare_hpcy_pixel – Flare location in EIS pixel coordinates EIS Observation Metadata: study_id_x – EIS study identifier eis_start_time_x, scan_time_x, column_time – EIS raster timing time_offset_seconds – Time offset between EIS observation and flare peak duration_from_peak – Observation duration relative to flare peak eis_xcen, eis_ycen – Raster center in arcsec eis_fovx, eis_fovy – Raster field-of-view dimensions (arcsec) NTV Data Structure: Each NTV CSV file contains the following columns: Time and Identification: bin_center: Time relative to flare peak (seconds) spectral_line: Name of the spectral line (e.g., 'fe_12_195.12_ntv') flare_class: Flare category ('C1', 'C2-3', 'C>4', 'M_class', 'X_class') flare_category: Same as flare_class (for normalized data) Statistical Measures (Raw Values): mean: Mean NTV value in the time bin (km/s) median: Median NTV value in the time bin (km/s) std: Standard deviation of NTV values in the time bin (km/s) percentile_25: 25th percentile (Q1) of NTV values (km/s) percentile_75: 75th percentile (Q3) of NTV values (km/s) Sample Information: count: Number of individual measurements in the time bin unique_flares: Number of unique flares contributing to the time bin Normalized Values (only in normalized file): norm_mean: Mean NTV normalized by peak value norm_median: Median NTV normalized by peak value norm_p25: 25th percentile normalized by peak value norm_p75: 75th percentile normalized by peak value normalization_factor: The peak value used for normalization (km/s) Usage Notes: Time bins are 300 seconds wide Negative times indicate before flare peak, positive times after peak Only time bins with sufficient data (>10 measurements) are included in plots Normalization is performed by dividing by the maximum smoothed median value within ±10000s of peak Spectral lines with insufficient data or known issues have been excluded Spectral Line Information: Lines are named as: element_ionization_wavelength_ntvExample: 'fe_12_195.12_ntv' = Fe XII 195.12 Å non-thermal velocity Citation:Please cite the associated paper when using this data. Python packages used for data curation: Sunpy, EISPAC, Pandas, Astropy