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Bipolar Active Regions Detection (BARD) Tilt Catalog

Harvard Dataverse (Africa Rice Center, Bioversity International, CCAFS, CIAT, IFPRI, IRRI and WorldFish)

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Title	Bipolar Active Regions Detection (BARD) Tilt Catalog

Identifier	https://doi.org/10.7910/DVN/QEMSZ2

Creator	Muñoz-Jaramillo, Andrés Zachary Werginz Juan Pablo Vargas Michael DeLuca Benjamin Navarrete

Publisher	Harvard Dataverse

Description	Citation and Acknowledgements Please cite both this database the paper describing it, as well as adding the following acknowledgement: "The BARD catalog of BMRs was downloaded from the solar dynamo dataverse (https://dataverse.harvard.edu/dataverse/solardynamo), maintained by Andrés Muñoz-Jaramillo." Database citation format is shown at the top of this page, underneath the database title. It can be downloaded in a variety of formats directly from this page The papers describing this database are A. Munoz-Jaramillo, Z. A. Werginz, J. P. Vargas-Acosta, M. D. DeLuca, J. C. Windmueller, J. Zhang, D. W. Longcope, D. A. Lamb, C. E. DeForest, S. Vargas-Dominguez, J. W. Harvey, & P. C. H. Martens , IEEE International Conference on Big Data, 3194 (2016). https://ieeexplore.ieee.org/document/7840975 A. Munoz-Jaramillo, B. Navarrete, & L. A. Campusano , The Astrophysical Journal, Volume 920, Issue 1, id.31, 11 pp. https://ui.adsabs.harvard.edu/abs/2021ApJ...920...31M Main Limitations The main limitations of these data are: BMR magnetic fluxes don't include cross-magnetograph calibration factors. Care must be taken when combining data from different surveys. A preliminary analysis suggests that all instruments can be combined 'as is', with the exception of SOHO/MDI. Applying a factor of 0.8 to MDI fluxes is necessary to homogenize them with the rest of instruments. Returning BMRs are counted as a new object. We have not yet paired long-lived objects across multiple solar rotations. Only one entry per BMR is included in this database at the time of maximum total unsigned flux. This means that BMRs that emerge on the 'dark' side of the Sun and rotate into view may have had some time to decay. File Structure There is a single file for each instrument and a merged catalog without overlaps and with MDI Flux calibrated using a factor of 0.8. Description Catalog of bipolar magnetic regions detected using the semi-automatic Bipolar Active Region Detection (BARD) code. Each active region is detected and tracked at a cadence of one magnetogram per day. The detection of positive and negative regions is done separately and then they are paired into BMRs based on flux-balance, size difference, and physical proximity. Then they are tracked as they crossed the disk. Pairing and tracking is vetted by a human observer: ReferenceDay: Arbitrary mission day Year Month Day Hour Minute Second BMRLabel: Arbitrary BMR label, unique to each mission PFlux: Positive region magnetic flux (Mx) PArea: Positive region area (m) PLatitude: Positive region latitude of flux-weighted centroid PLongitude: Positive region longitude of flux-weighted centroid PpixelAvgRadius: Positive region flux-weighted average radius in pixels NFlux: Negative region magnetic flux (Mx) NArea: Negative region area (m) NLatitude: Negative region latitude of flux-weighted centroid NLongitude: Negative region longitude of flux-weighted centroid NpixelAvgRadius: Negative region flux-weighted average radius in pixels R: Radius from disk center LeadingPolarity: Polarity of leading region DayAfterChrist: Absolute number of days after christ FRACYEAR: Fractional year of observation PlotSize: Size that can be used in plotting BMRLatitude: Flux weighted centroid of BMR Latitude BMRLongitude: Flux weighted centroid of BMR Longitude BMRArea: Total BMR area (m) BMRFlux: Total BMR unsigned flux (Mx) Flux_cut: Boolean mask marking with 'TRUE' BMRS whose numbers don't suffer from instrumental problems Tilt_rel: Relative tilt using the leading polarity as reference Tilt_abs: Absolute tilt using the negative polarity as reference HH_2Xn: Boolean mask marking with 'TRUE' Hale BMRs in the Northern hemisphere for solar cycle 2X AH_2Xn: Boolean mask marking with 'TRUE' Anti-Hale BMRs in the Northern hemisphere for solar cycle 2X HH_2Xs: Boolean mask marking with 'TRUE' Hale BMRs in the Southern hemisphere for solar cycle 2X AH_2Xs: Boolean mask marking with 'TRUE' Anti-Hale BMRs in the Southern hemisphere for solar cycle 2X Cycle_2Xn: Boolean mask marking with 'TRUE' for BMRs in the Northern hemisphere for solar cycle 2X Cycle_2Xs: Boolean mask marking with 'TRUE' for BMRs in the Southern hemisphere for solar cycle 2X Hale: Boolean mask marking Hale regions AntiHale: Boolean mask marking anti-Hale regions

Subject	Astronomy and Astrophysics Sun Solar Magnetic fields Active regions

Contributor	Muñoz-Jaramillo, Andrés