Mount Wilson Observatory Magnetograms - Mirror

Citation and Acknowledgements Please cite this database (see above), as well as adding the following acknowledgement: \"This study includes data from the synoptic program at the150-Foot Solar Tower of the Mt. Wilson Observatory. The Mt. Wilson 150-Foot Solar Tower is operated by UCLA, with funding from NASA, ONR and NSF, under agreement with the Mt. Wilson Institute. Data were downloaded from the solar dynamo dataverse (https://dataverse.harvard.edu/dataverse/solardynamo), maintained by Andrés Muñoz-Jaramillo.\" Main Limitations The main limitations of these data are: Cadence is one image per day, but it is common to have missing days Since this repository is a mirror, there are likely issues that are not reported in this metadata. The MWO magnetograph received several upgrades roughly every 10 years (1972, 1982, 1991). There may be uncertainty on the cross-calibration across these upgrades I (Andrés Muñoz-Jaramillo) got permission by Roger Ulrich to make this mirror, which I hope will significantly reduce the risk of these invaluable data being irrevocably lost. Any improvements or details that can be added by the community are welcome. File Structure The database is comprised of one tar.gz file per year, each containing all available magnetograms for that given year. Each magnetogram is stored using fits format with header information. Description More information about the MWO magnetograph can be found in the following publications: Babcock, Horace W., “The Solar Magnetograph,” Astrophysical Journal, 118, 387 (1953). Howard, Robert F., “The Mount Wilson Solar Magnetograph: Scanning and Data System,” Solar Physics, Vol. 48, June 1976.