Table 2:

Observed transitions of cyanic acid, HOCN, toward Sgr B2.

Sourcea	Transition	Frequencyb	c	d	Ie	Ie	Comments
		(MHz)	(MHz)	(mK)	(K km s-1)	(K km s-1)
(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)
(20 , 100 )	40,4-30,3	83 900.572	0.31	25	10.19(15)	7.89	no blend
	50,5-40,4	1 04 874.679	0.31	19	7.38(11)	7.60	no blend
	70,7-60,6	1 46 820.687	0.31	29	3.59(13)	3.66	no blend
	80,8-70,7	1 67 792.311	0.31	40	2.94(17)	1.94	weak detection
Sgr B2(M)	40,4-30,3	83 900.572	0.31	8	2.13(05)	1.67	no blend
	50,5-40,4	1 04 874.679	0.31	10	2.67(05)	2.20	partial blend with 13CH3CH2CN + U-line?
	70,7-60,6	1 46 820.687	0.31	18	4.50(08)	2.90	partial blend with U-line?
	80,8-70,7	1 67 792.311	0.31	43	6.56(17)	3.65	partial blend with U-line?
Sgr B2(N)	40,4-30,3	83 900.572	0.31	9	4.66(05)	3.74	weak blend with CH3CH3CO
	50,5-40,4	1 04 874.679	0.31	10	13.98(05)	5.05	strong blend with C2H3CN, v11 = 1/v15 = 1 and 13CH3CH2CN
	70,7-60,6	1 46 820.687	0.31	17	12.01(08)	6.89	blend with U-lines
	80,8-70,7	1 67 792.311	0.31	42	16.57(18)	8.66	blend with H13CCCN, v6=1 and U-line
Sgr B2(S)	70,7-60,6	1 46 820.687	4.00	21	5.03(39)	3.68	no blend
	80,8-70,7	1 67 792.311	4.00	20	0.70(32)	1.60	uncertain detection
(20 , -180 )	70,7-60,6	1 46 820.687	4.00	29	1.76(53)	1.93	uncertain detection
	80,8-70,7	1 67 792.311	4.00	24	0.03(38)	1.51	uncertain detection
(-40 , 0 )	70,7-60,6	1 46 820.687	4.00	26	4.76(61)	4.55	no blend
	80,8-70,7	1 67 792.311	4.00	36	5.17(73)	4.13	uncertain detection

Notes.  ^(a) The J2000 equatorial offsets are given with respect to Sgr B2(M). ^(b) Laboratory rest frequencies were taken from (Brünken et al. 2009a). ^(c) Channel width. ^(d) Measured rms noise level in scale. ^(e) Integrated intensity in scale for the observed spectrum (Col. 6) and the model of cyanic acid (Col. 7). The integration limits are marked in Figs. 3-5 by vertical dotted lines. The uncertainty in Col. 6 is given in parentheses in units of the last digit and is purely statistical.