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Table 3:

Parameters of our best-fit LTE models of cyanic acid and isocyanic acid.
    HOCN   HNCO  
Sourcea $V_{{\rm lsr}}$ Sizeb $T_{{\rm rot}}$ Nc $_{{\rm HOCN}}$ FWHM Vd $_{{\rm off}}$   $T_{{\rm rot}}$ Ne $_{{\rm HNCO}}$ FWHM Vd $_{{\rm off}}$ Rf
  (km s-1) ( $^{\prime \prime }$) (K) (cm-2) (km s-1) (km s-1)   (K) (cm-2) (km s-1) (km s-1)  
(1) (2) (3) (4) (5) (6) (7)   (9) (10) (11) (12) (13)

Sgr B2(M) 		62 60.0 $12^{\rm +8}_{-3}$ $7.5^{\rm +3.5}_{-1.5} \times 10^{12}$ 14.0 0.0   $12^{\rm +3}_{-2}$ $ 1.7^{\rm +1.3}_{-0.7} \times 10^{15}$ 14.0 1.0 $230^{\rm +270}_{-140}$
    3.0 $100^{\rm +60}_{-60}$ $ 7.0^{\rm +8.0}_{-4.0} \times 10^{14}$ 12.0 0.0   [100] $ 6.0 \times 10^{16}$ 12.0 1.0 $90^{\rm +110}_{-50}$
SgrB2 (N) 64 60.0 [14] $ 7.0^{\rm +1.0}_{-2.0} \times 10^{12}$ 9.0 0.0   $14^{\rm +6}_{-4}$ $ 1.7^{\rm +1.3}_{-0.7} \times 10^{15}$ 9.0 -1.0 $ 240^{\rm +360}_{-115}$
    60.0 [14] $ 9.0^{\rm +2.0}_{-1.0} \times 10^{12}$ 12.0 11.0   $14^{\rm +6}_{-4}$ $ 1.2^{\rm +2.8}_{-0.2} \times 10^{15}$ 12.0 14.0 $130^{\rm +370}_{-40}$
    2.4 [200] $ 3.0 \times 10^{15}$ 7.0 0.0   [200] $ 1.3 \times 10^{18}$ 7.0 -1.0 430
    1.9 [200] $ 3.7 \times 10^{15}$ 7.0 10.0   [200] $ 8.0 \times 10^{17}$ 7.0 9.0 220
Sgr B2(S) 61 60.0 $7^{\rm +5}_{-5}$ $ 4.2^{\rm +1.0}_{-3.0} \times 10^{13}$ 17.0 -2.0   23 $1.8 \times 10^{15}$g $\cdots$ $\cdots$ $43^{\rm +107}_{-8}$
(20 $^{\prime \prime }$, 100 $^{\prime \prime }$) 68 60.0 $9^{\rm +4}_{-2}$ $ 5.0^{\rm +2.0}_{-2.0} \times 10^{12}$ 8.0 11.0   $14^{\rm +2}_{-1}$ $ 8.0^{\rm +4.0}_{-3.0} \times 10^{14}$ 8.0 11.0 $160^{\rm +240}_{-90}$
    60.0 $9^{\rm +1}_{-1.5}$ $ 1.2^{\rm +0.2}_{-0.2} \times 10^{13}$ 7.0 3.0   $14^{\rm +2}_{-2}$ $ 2.0^{\rm +1.0}_{-0.5} \times 10^{15}$ 7.0 3.0 $170^{\rm +130}_{-63}$
    60.0 $9^{\rm +4}_{-2}$ $ 9.0^{\rm +1.0}_{-1.0} \times 10^{12}$ 8.0 -5.0   $14^{\rm +2}_{-2}$ $ 1.9^{\rm +1.4}_{-0.5} \times 10^{15}$ 8.0 -5.0 $210^{\rm +228}_{-70}$
(-40 $^{\prime \prime }$, 0 $^{\prime \prime }$) 54 60.0 [28] $ 9.5^{\rm +3.5}_{-2.5} \times 10^{12}$ 12.0 2.5   $28^{\rm +2}_{-4}$ $ 2.1^{\rm +0.3}_{-0.3} \times 10^{15}$ 12.0 2.5 $220^{\rm +123}_{-20}$
    60.0 [15] $ 7.0^{+2.0}_{-2.0} \times 10^{12}$ 12.0 18.2   $15^{\rm +3}_{-2}$ $ 2.7^{\rm +1.0}_{-0.7} \times 10^{15}$ 12.0 18.2 $350^{\rm +8}_{-168}$
(20 $^{\prime \prime }$, -180 $^{\prime \prime }$) 50 60.0 [15] $ 7.0^{\rm +2.0}_{-2.0} \times 10^{12}$ 14.0 0.0   15 $ 1.4 \times 10^{15}$g $\cdots$ $\cdots$ $200^{\rm +80}_{-44}$

Notes.  (a) The offsets are given with respect to Sgr B2(M). (b) Source diameter (FWHM). The size of the compact sources was derived from the modeling of HNCO. The size of the extended sources was fixed to 60 $^{\prime \prime }$. (c) Column density of cyanic acid. (d) Velocity offset with respect to the systemic velocity of the source given in Col. (2). (e) Column density of isocyanic acid. (f) Column density ratio [HNCO]/[HOCN]. (g) Column density values in Martín et al. (2008) were multiplied by 1.4 to account for beam efficiencies and beam filling factors.


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