aKoninklijke Sterrenwacht van België, Ringlaan 3, B‐1180 Brussel, Belgium
bDepartment of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand
cThüringer Landessternwarte Tautenburg, 07778 Tautenburg, Germany
dDepartment of Physics and Astronomy, Universtity of Victoria, Victoria, BC V8W 3P6, Canada
eOkayama Astrophysical Observatory, National Astronomical Observatory, Kamogata, Okayama 719‐0232, Japan
fInstituut voor Sterrenkunde, Katholieke Universiteit Leuven, Celestijnenlaan 200D, B‐3001 Leuven, Belgium
gCrimean Astrophysical Observatory, Nauchny, Crimea, 98409, Ukraine
hINAF‐Brera Astronomical Observatory, Via E. Bianchi 46, 23807 Merate, Italy
iSouth African Astronomical Observatory, PO Box 9, Observatory, 7935 Cape Town, South Africa
jDepartment of Astronomy, Beijing Normal University, 19 Avenue Xinjiekouwai, Beijing 100875, China
