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Table 1

Summary of the VISIR observations.

No. Name Sp. Type DEC V helio t obs Seeing Airmass Int. time Calibrator Remarks
(km s-1) (UTC) (′′) (sec)

K–M giants
1 α Boo K1.5III 0.0 − 5.2 ± 0.3ab 03:44:15 0.72 1.49 180 C8
2 γ Cru M3.5III 0.0 21.0 ± 0.6ac 01:53:35 1.15 1.24 180 C4
3 σ Lib M3/M4III 0.0 − 3.9 ± 0.6a 06:24:15 0.71 1.01 180 C6
4 V806 Cen M4.5III 0.01 40.7 ± 0.6a 02:08:55 1.39 1.20 180 C4
5 ε Mus M5III −0.01 7.1 ± 0.6a 04:28:15 0.90 1.42 180 C5
6 L2 Pup M5III 0.60 52.1 ± 0.3d 00:16:55 0.88 1.20 180 C1
7 θ Aps M6.5III 0.29 9.0 ± 0.3d 02:56:55 1.16 1.70 600 C4

Red supergiants
8 α Ori M2Iab 0.25 19.6 ± 0.2e 00:00:55 0.97 1.86 180 C3
9 α Sco M1.5Iab-b 0.06 − 3.5 ± 5af 05:19:35 0.91 1.12 180 C6
10 α Her M5Ib-II −0.04 − 30.4 ± 5af 07:36:15 0.59 1.30 180 C8
11 VY CMa M2.5-5Iae 25 45.5 ± 4.5g 01:10:15 0.98 1.31 180 C2
12 VX Sgr M4Ia-10eIa 0.73 − 5.6 ± 1.3g 06:39:35 0.84 1.17 180 C6

Mira stars
13 R Aql M5-9e 0.36 28.1 ± 0.2h 07:50:15 0.63 1.40 180 C8 phase = 0.18
14 R Hya M6-9eS 0.24 − 11.9 ± 0.2h 05:49:35 0.83 1.07 180 C6 phase = 0.44
15 W Hya M7.5-9ep 0.10 37.9 ± 0.2h 02:41:35 1.34 1.11 180 C5 phase = 0.00

Unknown nature
16 GCIRS3 07:10:55 0.66 1.05 600 C7

Calibrators
C1 α Car F0II 23:44:15 0.99 1.30 180
C2 α CMi F5IV-V 00:32:15 0.71 1.35 540
C3 α CMi F5IV-V 01:26:55 1.09 1.69 540
C4 α Cen A G2V 02:27:35 0.68 1.48 180
C5 α Cen A G2V 03:20:55 0.73 1.35 180
C6 α Cen A G2V 05:34:15 0.75 1.24 180
C7 α Cen A G2V 06:54:15 0.71 1.29 180
C8 α Aql A7V 08:04:55 0.66 1.48 1400

Notes. Seeing is in the visible. Int. time = Integration time.

Reference. For the heliocentric systemic velocities:

(a)

Gontcharov (2006),

(b)

Hatzes & Cochran (1993),

(c)

Murdoch et al. (1992),

(d)

Kerschbaum & Olofsson (1999),

(e)

O’Gorman et al. (2012),

(f)

Smith et al. (1989),

(g)

Kemper et al. (2003),

(h)

Young (1995).

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