Radio structure of the blazar 1156 + 295 with sub-pc resolution

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Table 1

Observation log.

Obs. date	Epoch	Frequency	VLBA	Band width	On-source time
	(yr)	(GHz)	participated telescopes	(MHz)	(Min)

2003-05-10	2003.36	15.0	All 10	64	122
		43.0	9 of 10^a	64	122
		86.0	7 of 10^b^c^d	64	121

2003-07-24	2003.56	15.0	9 of 10^e	64	122
		43.0	9 of 10^e	64	122
		86.0	8 of 10^b^e	64	121

2004-04-01	2004.25	15.0	All 10	64	118
		43.0	All 10	64	118
		86.0	8 of 10^b^c	64	117

2005-03-13	2005.19	15.0	9 of 10^f	64	118
		43.0	8 of 10^f^g	64	118
		86.0	8 od 10^c^f	64	117

Notes.

^(a)

FD data were corrupted at 43.0 GHz;

^(b)

BR had no 3 mm receiver;

^(c)

SC had no 3 mm receiver;

^(d)

No fringes detected at 86.0 GHz on baseline of HN;

^(e)

SC was out for maintenance;

^(f)

HN was removed during the observing run due to bad weather;

^(g)

SC data were flagged out because of their abnormal system temperature.

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