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Home All issues Volume 494 / No 3 (February II 2009) A&A, 494 3 (2009) 977-985 Full HTML
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Table 2:

Observation parameters for the HCO deep integrations shown in Fig. 1. Associated transitions can be found in Table 3. The RA and Dec offsets are computed with reference to $\alpha _{2000} = \rm05^h40^m54.27^s$, $\delta_{2000} = -02\mbox{$^\circ$ }28' 00''$. The positions are also given in the coordinate system used to display the maps in Figs. 1 and 5. In this coordinate system, maps are rotated by 14$^\circ $ counter-clockwise around the projection center, located at $(\delta x,\delta y)$ = (20'',0''), to bring the illuminated star direction in the horizontal direction and the horizontal zero has been set at the PDR edge.
Position name $(\delta$RA, $\delta$Dec) $(\delta x,\delta y)$
  arcsec arcsec
``DCO+ peak'' (20'',22'') (44.7'',16.5'')
``HCO peak'' (-5,0'') (15.1'', 1.2'')

Position Frequency Line areaa Instrument $F_{\mbox{${\rm eff}$ }}$ $B_{\mbox{${\rm eff}$ }}$ Resol. Resol. Int. Timeb $T_{\rm sys}$ Noise Obs. date
  GHz K km s-1       arcsec km s-1 h K mK  
``DCO+ peak'' 86.670760 $0.23\pm0.009$ 30 m/B100 0.95 0.78 28.4 0.27 0.75/1.5 134 11 2008
  86.708360 $0.12\pm0.009$ 30 m/B100 0.95 0.78 28.4 0.27 0.75/1.5 134 11 2008
``HCO peak'' 86.670760 $0.52\pm0.008$ 30 m/B100 0.95 0.78 28.4 0.27 0.75/1.5 127 10 2008
  86.708360 $0.31\pm0.007$ 30 m/B100 0.95 0.78 28.4 0.27 0.75/1.5 127 10 2008
  173.3773770 $0.47\pm0.023$ 30 m/C150 0.93 0.65 14.2 0.067 2.0/4.0 667 66 2008
  173.4060816 $0.26\pm0.018$ 30 m/C150 0.93 0.65 14.2 0.067 2.0/4.0 667 66 2008
  173.4430648 $0.23\pm0.020$ 30 m/C150 0.93 0.65 14.2 0.067 2.0/4.0 667 66 2008
  260.0603290 $0.16\pm0.019$ 30 m/C270 0.88 0.46 9.5 0.18 3.0/6.0 740 59 2008
  260.0821920 $0.14\pm0.020$ 30 m/C270 0.88 0.46 9.5 0.18 3.0/6.0 740 59 2008
  260.1335860 $0.12\pm0.017$ 30 m/C270 0.88 0.46 9.5 0.18 3.0/6.0 740 59 2008
  260.1557690 $0.06\pm0.016$ 30 m/C270 0.88 0.46 9.5 0.18 3.0/6.0 740 59 2008
a Values obtained from Gaussian fits performed on the spectra using the main beam temperature scale. b Two values are given for the integration time: the on-source time and the telescope time.

Source LaTeX | All tables | In the text

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