Spectral characterisation of the stars observed.
|Star||UCAC4 IDa||R mag b||J − K c||Spectral type|
|W17||310-085339||11.31||0.29 ± 0.06||F5.5−G8.0|
|Ref 2||310-085352||13.26||0.29 ± 0.05||F7.5−G8.0|
|Ref 3||310-085281||12.26||0.37 ± 0.06||G4.0−K1.0|
|Ref 4||310-085328||14.9||0.42 ± 0.07||G9.0−K3.0|
|Ref 5||310-085333||14.82||0.66 ± 0.06||K5.0−K7.0|
|Ref 6||310-085382||12.7||0.42 ± 0.04||G9.0−K2.0|
The stellar catalogue IDs are given using references from The fourth US naval observatory CCD astrograph catalog (UCAC4; Zacharias et al. 2013).
R magnitudes are obtained from the UCAC2 catalogue (Zacharias et al. 2004).
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