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Table 1

Basic data of the candidate red supergiants.

Star ID α(2000) δ(2000) J H K S Sp. type Name
1 20:33:23.92 +40:36:44.2 6.984 4.887 3.902 M0I1 IRAS 20315+4026
2 20:28:06.19 +40:40:06.1 5.675 4.420 3.518 – IRAS 20263+4030
3 20:33:01.06 +40:45:40.4 3.8592 2.0262 1.2962 M4I: RAFGL 2605
4 20:30:51.53 +40:48:08.6 4.884 3.814 3.342 – IRAS 20290+4037
5 20:31:28.70 +40:38:43.3 4.131 2.883 2.328 M1:Iab RAFGL 2600
6 20:26:43.03 +40:56:26.8 5.085 3.645 3.095 – IRAS 20249+4046
7 20:35:54.73 +40:57:40.1 5.869 4.198 3.288 M3Iab:3 IRAS 20341+4047

Notes.

(1)

We adopted the classification of Imanishi et al. (1996). Rawlings et al. (2000) suggested that it might be an early star, but this is conclusively ruled out by the K-band spectroscopy presented here.

(2)

Photometry obtained from 2MASS, uncertain by ~0.3 mag in each band. The star is too bright for the setup used in our observations, even after strong defocusing.

(3)

We adopted the classification of Imanishi et al. (1996), which is consistent with the near-infrared spectrum presented here. We note, however, that there are highly discrepant spectral classifications of this object (Rawlings et al. 2000).

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