BiSON Time Series

The Birmingham Solar Oscillations Network (BiSON) provides high-quality high-cadence observations from as far back in time as 1978. However, 1985 is the earliest period for which at least three sites were observing regularly.

These data are calibrated from the raw observations into radial velocity and the quality of the calibration has a large impact on the signal-to-noise ratio of the final time series. For details on this procedure please see 10.1093/mnras/stu803.

If you would like a specific time period of data or have a special processing request, please contact us for a bespoke solution. When making use of these data, please cite both 10.1007/s11207-015-0810-0 and 10.1093/mnras/stu803 in any publications. Suggested BibTeX entries are below.

@Article{s11207-015-0810-0,
 author = "Hale, S. J. and Howe, R. and Chaplin, W. J. and Davies, G. R. and Elsworth, Y. P.",
  title = "{{Performance of the Birmingham Solar-Oscillations Network (BiSON)}}",
journal = {\solphys},
   year = {2016},
  month = jan,
    day = {1},
 volume = {291},
 number = {1},
  pages = {1--28},
   issn = {1573-093X},
    doi = "10.1007/s11207-015-0810-0",
    url = "https://doi.org/10.1007/s11207-015-0810-0"
}
@article{doi:10.1093/mnras/stu803,
author = {Davies, G. R. and Chaplin, W. J. and Elsworth, Y. P. and Hale, S. J.},
title = {BiSON data preparation: a correction for differential extinction and the weighted averaging of contemporaneous data},
journal = {Monthly Notices of the Royal Astronomical Society},
volume = {441},
number = {4},
pages = {3009-3017},
year = {2014},
doi = {10.1093/mnras/stu803},
URL = {http://dx.doi.org/10.1093/mnras/stu803},
}

All sites - 1976/01 to 2017/10 - Optimised for Fill

        SIMPLE  =                    T / Written by IDL:  Mon Oct 30 15:29:31 2017      
        BITPIX  =                  -64 /Real*8 (double precision)                       
        NAXIS   =                    2 /                                                
        NAXIS1  =                    2 /                                                
        NAXIS2  =             33004799 /                                                
        D-START =        2442778.50000 /Data start (Julian)                             
        D-END   =        2458058.50000 /Data end (Julian)                               
        STATIONS= 'na ca cb su iz la mo ha' /Stations Used                              
        METHOD  = 'waverage'           /Overlap Method                                  
        CADENCE = '40      '           /Timeseries Cadence                              
        N-THRES =                  150 /Noise Rejection Threshold                       
        GAPFILL =                    1 /GapFill                                         
        FILL    =             0.551828 /Duty Cycle                                      
        COMMENT Generated by BiSON                                                      
        COMMENT $Id: timeseries.php 171 2018-12-11 11:03:12Z halesj $                            
        END                                                                             

MD5: ad88c50b853a268375822aa68a43e8c0

Download: allsites-alldata-waverage-fill.fits.gz

All sites - 1995 to 2014 - Performance Check

        SIMPLE  =                    T / Written by IDL:  Wed May 27 11:08:33 2015      
        BITPIX  =                  -64 /Real*8 (double precision)                       
        NAXIS   =                    2 /                                                
        NAXIS1  =                    2 /                                                
        NAXIS2  =             15778799 /                                                
        D-START =        2449718.50000 /Data start (Julian)                             
        D-END   =        2457023.50000 /Data end (Julian)                               
        STATIONS= 'na ca cb su iz la mo' /Stations Used                                 
        METHOD  = 'waverage'           /Overlap Method                                  
        CADENCE = '40      '           /Timeseries Cadence                              
        N-THRES =                  100 /Noise Rejection Threshold                       
        FILL    =             0.783800 /Duty Cycle                                      

In addition to the above citations, if using this dataset please also cite the dataset itself in any publications. A suggested BibTeX entry is below.

@misc{edata59,
      title = {{BiSON - All Sites - 1995 to 2014 - Performance Check}},
     author = {Steven J. Hale},
  publisher = {Birmingham Solar Oscillations Network},
       year = {2015},
      month = may,
        doi = "10.25500/eData.bham.00000059",
        url = {https://edata.bham.ac.uk/59/}
}

MD5: a8e28b5532d449202a5e55b6452812da

Download: bison-allsites-1995-2014.fits.gz

All sites - 1985/01 to 2015/12 - Optimised for Quality

        SIMPLE  =                    T / Written by IDL:  Tue Jan 19 11:22:20 2016      
        BITPIX  =                  -64 /Real*8 (double precision)                       
        NAXIS   =                    2 /                                                
        NAXIS1  =                    2 /                                                
        NAXIS2  =             24455519 /                                                
        D-START =        2446066.50000 /Data start (Julian)                             
        D-END   =        2457388.50000 /Data end (Julian)                               
        STATIONS= 'na ca cb su iz la lb mo' /Stations Used                              
        METHOD  = 'waverage'           /Overlap Method                                  
        CADENCE = '40      '           /Timeseries Cadence                              
        N-THRES =                   80 /Noise Rejection Threshold                       
        GAPFILL =                    1 /GapFill                                         
        FILL    =             0.638866 /Duty Cycle                                      
        COMMENT Generated by BiSON                                                      
        COMMENT $Id: timeseries.php 171 2018-12-11 11:03:12Z halesj $                            
        END                                                                             

MD5: f1e9d86df7925cc9fb961203a8e22981

Download: allsites-waverage-quality.fits.gz

All sites - 1985/01 to 2015/12 - Optimised for Fill

        SIMPLE  =                    T / Written by IDL:  Tue Jan 19 16:39:25 2016      
        BITPIX  =                  -64 /Real*8 (double precision)                       
        NAXIS   =                    2 /                                                
        NAXIS1  =                    2 /                                                
        NAXIS2  =             24455519 /                                                
        D-START =        2446066.50000 /Data start (Julian)                             
        D-END   =        2457388.50000 /Data end (Julian)                               
        STATIONS= 'na ca cb su iz la lb mo' /Stations Used                              
        METHOD  = 'waverage'           /Overlap Method                                  
        CADENCE = '40      '           /Timeseries Cadence                              
        N-THRES =                  150 /Noise Rejection Threshold                       
        GAPFILL =                    1 /GapFill                                         
        FILL    =             0.671943 /Duty Cycle                                      
        COMMENT Generated by BiSON                                                      
        COMMENT $Id: timeseries.php 171 2018-12-11 11:03:12Z halesj $                            
        END                                                                             

MD5: c41de431bca722da5398f7a92504ca67

Download: allsites-waverage-fill.fits.gz

All sites - 2012 - Optimised for Fill

        SIMPLE  =                    T / Written by IDL:  Mon May 12 14:25:10 2014
        BITPIX  =                  -64 /Real*8 (double precision)
        NAXIS   =                    2 /
        NAXIS1  =                    2 /
        NAXIS2  =               790560 /
        D-START =        2455927.50000 /Data start (Julian)
        D-END   =        2456293.50000 /Data end (Julian)
        STATIONS= 'na cb su iz la mo'  /Stations Used
        METHOD  = 'waverage'           /Overlap Method
        CADENCE = '40      '           /Timeseries Cadence
        N-THRES =                  150 /Noise Rejection Threshold
        GAPFILL =                    1 /GapFill
        FILL    =             0.807505 /Duty Cycle

MD5: 2f28b46a1f2f0dd5616bae517f65a98f

Download: allsites-waverage-2012.fits.gz