The first radial velocity measurements of a microlensing event: no evidence for the predicted binary

I. Boisse; A. Santerne; J.-P. Beaulieu; W. Fakhardji; N. C. Santos; P. Figueira; S. G. Sousa; C. Ranc

doi:10.1051/0004-6361/201526666

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Volume 582 (October 2015)

A&A, 582 (2015) L11

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Table A.2

Log of the observations.

Date	BJD	BERV	RV_O2¹	SNR ²	Mid-exposure³	Texp	Airmass	Seeing	Comments
	–2 400 000	km s^-1	km s^-1			s

2013-10-07	56 573.52363	–27.94246	1.1275	18.6	0.44	3480	1.46	1.09	Seeing+10%
2014-03-04	56 721.88561	29.70781	0.2125	20.6	0.54	3480	1.16	1.01	Target drifted out of the slit
2014-03-05	56 722.85366	29.83478	0.9318	22.0	0.51	3480	1.30	0.75
2014-03-12	56 729.83683	30.14055	–0.6964	21.6	0.44	3480	1.28	0.69
2014-03-29	56 746.84698	29.02487	–0.0933	13.5	0.51	3080	1.07	1.76	Seeing deteriorated to the point
									that the OB was ended. Wind was high too
2014-04-21	56 769.80834	23.79164	–0.1324	19.5	0.50	3480	1.03	0.60
2014-04-23	56 771.82660	23.10472	0.4227	21.0	0.49	3600	1.01	1.01
2014-06-21	56 830.73591	–3.24235	0.9928	24.0	0.50	3600	1.07	1.00
2014-07-25	56 864.62468	–18.49718	–0.0896	24.0	0.52	3600	1.04	0.71
2014-09-24	56 925.52640	–29.52330	–0.4456	21.6	0.48	3600	1.24	0.74	Guide probe around 0.8′′−1.0′′

Notes. All RV measurements are kept in the analysis because weather degradations did not induce significant RV changes (see text). BJD, seeing and airmass values are given at mid-exposure.

⁽¹⁾

RV_O2 is the RV derived from the cross-correlation of the spectra with a telluric O₂ mask.

⁽²⁾

The SNR is per pixel at ~550 nm.

⁽³⁾

The mid-exposure is calculated from the photometer count of the detectors and weighting by the spectral information between the blue and the red arms.

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