The deep 3.4 μm interstellar absorption feature toward the IRAS 18511+0146 cluster

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Table 1

Log of the spectroscopic observations.

Source	Observation date	Exposure time	Standard star
		(s)	Name	Spectral type	T_eff (K)	L-band magnitude

S7	12 March 2009	240	HIP 89601	F2V	6980^a	5.80
S10	19 May 2009	2880	HIP 95253	F6V	6340^b	5.15
S11	7 May 2009	7200	HIP 89601	F2V	6980^a	5.80

Notes.

^(a)

Boesgaard & Tripicco (1986);

^(b)

Balachandran (1990).

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