Table 1: Observing and calibration parameters for the MERLIN spectral-line observations of IRAS 20126+4104.
Observational parameters OH masers H₂O masers CH₃OH masers

Date of observation 20 28 and 29 16 and 17

Jan. 2002 Mar. 2002 May 2002

Antenna used De CA DA CA MK2 DA CA MK2

KN MK2 TA KN TA

Field centre (2000) $\alpha 20^{\rm h} 14^{\rm m} 26.04^{\rm s}$ $\alpha 20^{\rm h} 14^{\rm m} 26.04^{\rm s}$ $\alpha 20^{\rm h} 14^{\rm m} 26.04^{\rm s}$

$\delta 41^{\circ} 13' 32.5''$ $\delta 41^{\circ} 13' 32.5''$ $\delta 41^{\circ} 13' 32.5''$

Rest frequency (MHz) 1665.402 1667.359 22 235.0798 6668.518

No. of frequency channels 1024 256 512

Total band width (MHz) 1 4 2

Bandpass calibrator 3C 84 4C 39.25 3C 84

Polarisation angle calibrator 3C 286 - -

Phase calibrator 2005+403 2005+403 2005+403

**Table 1:** Observing and calibration parameters for the MERLIN spectral-line observations of IRAS 20126+4104.
Observational parameters	OH masers	H₂O masers	CH₃OH masers
Date of observation	20	28 and 29	16 and 17
	Jan. 2002	Mar. 2002	May 2002
Antenna used	De CA DA	CA MK2 DA	CA MK2
	KN MK2 TA	KN TA
Field centre (2000)	$\alpha 20^{\rm h} 14^{\rm m} 26.04^{\rm s}$	$\alpha 20^{\rm h} 14^{\rm m} 26.04^{\rm s}$	$\alpha 20^{\rm h} 14^{\rm m} 26.04^{\rm s}$
	$\delta 41^{\circ} 13' 32.5''$	$\delta 41^{\circ} 13' 32.5''$	$\delta 41^{\circ} 13' 32.5''$
Rest frequency (MHz)	1665.402 1667.359	22 235.0798	6668.518
No. of frequency channels	1024	256	512
Total band width (MHz)	1	4	2
Bandpass calibrator	3C 84	4C 39.25	3C 84
Polarisation angle calibrator	3C 286	-	-
Phase calibrator	2005+403	2005+403	2005+403

Source LaTeX | All tables | In the text

	1 Introduction
	2 Observations and data reduction
	3 Results
	4 Discussion
	5 Conclusions
	References