Solar wind velocities for C/2013 R1 (Lovejoy)

This dataset was analysed and presented in the ‘Solar Wind Velocities at Comets C/2011 L4 Pan-STARRS and C/2013 R1 Lovejoy derived using a New Image Analysis Technique’ paper. Submitted to JGR - Space Physics.Please contact the author at [e-mail] for info on the software. This dataset was collected from amateur astrophotographers from around the world and observations from the Isaac Newton Telescope were undertaken by Y. Ramanjooloo and K. Birkett. The data spanned two weeks on either side of the comet’s perihelion and covers part of Carrington Rotation 2144 and 2145.Each image was processed through IDL using the main technique described in the paper to produce radial solar wind velocity estimates from the cometary ion tail of comet C/2013 R1 (Lovejoy).The processed variables, including the final solar wind velocity results are stored as individual .sav files for each image. IDL is required to open and analyse these .sav files. the python package readsav is also available - see links below.In repository:1. Image of comet C/2013 R1 (Lovejoy) acquired by G. Rhemann on 13 December 2013 at 03:41 UT[https://figshare.com/ndownloader/files/31785983/preview/31785983/preview.jpg]2. Data coverage of C/2013 R1 (Lovejoy) as observed from Earth and mapped onto the comet’s orbital plane. The Sun is at (0,0) and the perihelion defines the y-axis. [https://figshare.com/ndownloader/files/31785986/preview/31785986/preview.jpg]3. Processed images from amateur astronomers as .sav files. To produce a plot of the solar wind velocities, the user will need to access these results from each .sav file and concatenate them.File naming convention is comet denomination + datetime_UTC + observer + .fits4. Processed INT images as .fits files. The raw data was processed through THELI for CCD distortion correction and solved through Astrometry.net. Each INT Wide-Field Camera image contains 4 CCDs (labeled 10,20,30, 40) [https://www.ing.iac.es/astronomy/instruments/wfc/]File naming convention for INT images is comet denomination + datetime_UTC + image number + CCD + filter + exptime + .fitsImages used for the non-radial velocity vector flowmaps are labeled with '_flowmap'. The raw data (also through the Isaac Newton Group of Telescopes), coadded and difference images are available upon request. ***Note:***.sav files are saved variables processed via IDL. More info can be found here:.sav: https://www.l3harrisgeospatial.com/docs/save.htmlIDL : https://www.l3harrisgeospatial.com/The following python package is available to process .sav files though the authors have no experience with this package.https://docs.scipy.org/doc/scipy/reference/generated/scipy.io.readsav.html