Database for Solar Soft X-ray (Hinode/XRT) and (E)UV (SDO/AIA & PROBA2/SWAP) Irradiance Variability
Solar Cycle 24

The segmentation of solar soft X-ray and E(UV) full-disk images for a longer period is important for understanding the solar spectral irradiance (SSI) and their impacts on Space Weather and Earth’s Climate studies. The XRT database uses Hinode/XRT data of full-disk X-ray image of the solar corona and segment it into its different features; Active Regions (ARs), Coronal Holes (CHs), Background (BGs), X-ray Bright Points (XBPs) and Limb. The database covers the intensity, temperature and corresponding underlying photospheric magnetic flux (SDO/HMI full-disk magnetograms) of the different coronal features. The database mainly uses the composite images from the Al_mesh filter of XRT. Since it is the only filter with continuous and good images throughout the mission period. The thin Al_mesh filter enables one to observe all the features (fainter to brighter) throughout the solar cycle. The database currently covers the data period from 2008 to 2023 (Solar Cycle 24).

1. Image Data of XRT (go to monthly page)

• XRT Segmentation maps
• XRT Temperature images



2. Time series data of the coronal features:

1. X-ray data (descriptions)
• XRT irradiance data (intensity & area) (csv file:2008-2023)
• XRT temperature data (csv file:2008-2012), (csv file:2012-2023)
• HMI magnetic field data (csv file:2010-2023)
2. (E)UV data (SDO/AIA & PROBA2/SWAP) (descriptions)
• AIA irradiance data (intensity & area) (csv file:2010-2022)
• SWAP irradiance data (intensity & area) (csv file:2010-2022)
• HMI magnetic field data (csv file:2010-2022)

When you publish your work using this database, we strongly encourage to acknowledge the publisher as follows as well as to cite the related papers.

Example of acknowledgments

ISEE Database for Solar Soft X-ray (Hinode/XRT) and (E)UV (SDO/AIA & PROBA2/SWAP) Irradiance Variability Solar Cycle 24 (doi: 10.34515/DATA_HSC-00002) was developed by the Hinode Science Center, Institute for Space-Earth Environmental Research (ISEE), Nagoya University.

• R. Kariyappa, H.N. Adithya, J. Zender, S. Masuda, T.Matsumoto, K. Kusano, S. Imada, L. Dame, E.E. Deluca, M. Webber, G. Giono, R. van der Zwaard, M. Bergmann, C. Verbeeck, V. Delouille, "Database for Solar Soft X-ray (Hinode/XRT) and (E)UV (SDO/AIA & PROBA2/SWAP) Irradiance Variability Solar Cycle 24", Hinode Science Center, Institute for Space-Earth Environmental Research, Nagoya University, 2023.
  doi:10.34515/DATA_HSC-00002

• H. N. Adithya, R. Kariyappa, Shinsuke Imada, Kanya Kusano, J. J. Zender, L. Dam, G. Giono, Mark Weber and E. E. DeLuca, 2021, Solar Soft X-ray Irradiance Variability, I: Segmentation of Hinode/XRT Full-Disk Images & Comparison with GOES (1-8 ) X-ray Flux, Sol. Phys. 296, 71.
  (doi:10.1007/s11207-021-01785-6)
• H. N. Adithya, R. Kariyappa, Kanya Kusano, Satoshi Masuda, Shinsuke Imada, JJ. Zender, L. Dame, Hegde Manjunath, E. E. DeLuca, Mark Weber: 2023, Solar Soft X-ray Irradiance Variability, II: Temperature Variations of Coronal X-ray Features, Sol. Phys. 298, 99.
  (doi:10.1007/s11207-023-02190-x)
• R. Kariyappa, H.N. Adithya, Satoshi Masuda, Kanya Kusano, Shinsuke Imada, JJ. Zender, L. Dame, E. E. DeLuca, Mark Weber: 2022, Solar Soft X-ray Irradiance Variability, III: Magnetic Field Variations of Coronal X-ray Features, Sol. Phys. in preparation.
• Kumara, S.T., Kariyappa, R., Zender, J.J., Giono, G., Delouille, V., Chitta, L.P., Dame, L., Hochedez, J. -F, Verbeeck, C., Mampaey, B. and Doddamani, V.H.: 2014, ”Segmentation of coronal features to understand the solar EUV and UV irradiance variability”, A & A, 561, A9.
  (doi:10.1051/0004-6361/201322137)
• Zender, J.J., Kariyappa, R., Giono, G., Chitta, L.P., Kumara, S. T. and Dam ́e, L.: 2017, ”Segmentation of Photospheric Magnetic Elements Corresponding to Coronal Features to Understand the EUV & UV Irradiance Variability”, A & A, 605, A41.
  (doi:10.1051/0004-6361/201629924)
• Zender, J. J., R. van der Zwaard1, R. Kariyappa, L. Dame, G. Gabriel, 2020, Segmentation of coronal features to understand the solar EIV and UV irradiance variability, EGUGA, 221946Z.
  (doi:10.5194/egusphere-egu2020-19496)
• R. van der Zwaard, M. Bergmann, J. J. Zender, R. Kariyappa, G. Giono, and L. Dam, 2021, Segmentation of coronal features to understand the solar EUV and UV irradiance variability III. Inclusion and Analysis of Bright points, Sol. Phys. 296, 138.
  (doi:10.1007/s11207-021-01863-9)
• G. Giono, J. J. Zender, R. Kariyappa, and L. Dam, 2021, Origin of the Solar Rotation Harmonics Seen in the EUV and UV Irradiance, Sol. Phys. 296, 172.
  (doi:10.1007/s11207-021-01918-x)