B fields in OB stars (BOB): on the detection of weak magnetic fields in the two early B-type stars β CMa and ϵ CMa - Possible lack of a “magnetic desert” in massive stars

L. Fossati; N. Castro; T. Morel; N. Langer; M. Briquet; T. A. Carroll; S. Hubrig; M. F. Nieva; L. M. Oskinova; N. Przybilla; F. R. N. Schneider; M. Schöller; S. Simón-Díaz; I. Ilyin; A. de Koter; A. Reisenegger; H. Sana

doi:10.1051/0004-6361/201424986

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Volume 574 (February 2015)

A&A, 574 (2015) A20

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Table 2

Journal of the HARPS observations.

Star	Date	HJD−	Exp time
name		2 456 000	[s]

β CMa	23/12/2013	650.8615	4 × 60
	24/12/2013	651.5584	4 × 250 ^a
	26/12/2013	653.7335	4 × 150 ^b
	27/12/2013	654.8186	4 × 75
	28/12/2013	655.8087	4 × 130 ^c
	21/04/2014	769.4650	4 × 40
	21/04/2014	769.4701	4 × 40
	21/04/2014	769.4741	4 × 40
	21/04/2014	769.4777	4 × 40
	21/04/2014	769.4813	4 × 40
	21/04/2014	769.4848	4 × 40
ϵ CMa	23/12/2013	650.8659	4 × 40
	24/12/2013	651.7392	4 × 35
	27/12/2013	654.8645	4 × 55
	21/04/2014	769.4907	4 × 45
	21/04/2014	769.4943	4 × 45
	21/04/2014	769.4980	4 × 45
	21/04/2014	769.5016	4 × 45
	21/04/2014	769.5052	4 × 45

Notes. The date, given in column two, corresponds to the start of the night of observation in format dd/mm/yyyy. The heliocentric Julian date (HJD) is that of the middle of the observation.

^(a)

Frames saturated.

^(b)

The first frame was taken with an exposure time of 200 s.

^(c)

The given exposure time of 130 s is an average of the actual exposure times which were 75, 140, 160, and 150 s.

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