Summary
 

Observation code	:	vs04c		AIPS Version	:	15OCT99
Date of Observation	:	1998/148		Difmap Version	:	2.3c
Source Name	:	J2139+14		vsop_difmap used	:	Yes
Calibration Source(s)	:	J2148+06
Ground telescopes	:	AR, HH, GB		Model Fitted to data	:	Yes
Tracking Station(s)	:	Madrid, Usuda		Image made	:	Yes
Correlator	:	Mitaka

 

Abstract This experiment consists of Arecibo, Greenbank and Hart. Real time Tsys information was only avairable for Hart. Nominal values of DPFU and Tsys are applied to GB. Any SEFD values for AR at C-band is not known and I adopt DPFU=1 and Tsys=10 K. With fairly good fringes for both Madrid and Usuda pass, I checked the cross points in uplot of difmap and found that SEFD is appropriate for both HA and AR regarding with USNO visibilities at both S and X band. However GB baselines provide too low amplitude about 1/3 of the expected valuse and correction with CLCOR in AIPS realize reasonable radplot in the end.

Model
Flux (Jy)	Radius (mas)	Theta (deg)	Major (mas)	Axial ratio	Phi (deg)	TB (10^12 K)
0.232067	0.216431	3.56799	0.292515	1.00000	-45.0000	0.1324
0.713279	0.118348	169.403	1.08527	0.392943	-78.4027	0.0752
(*) Quoted Brightness temperatures assume Gaussian components and are in the local (z=0) frame.

AIPS Input Files

Comments - None -

AIPS Output Files

PRTAN.LIS LISTR.LIS DTSUM_0.LIS DTSUM_1.LIS UVPLT_UV.PS UVPLT_UVD.PS UVPLT_UVPA.PS

SN_APCAL_AMP_2.PS SN_APCAL_AMP_1.PS SN_CALIB_DEL_1.PS SN_CALIB_DEL_2.PS SN_CALIB_RAT_1.PS SN_CALIB_RAT_2.PS SN_CALIB_SNR_1.PS

SN_CALIB_SNR_2.PS SN_CALIB_PHA_1.PS SN_CALIB_PHA_2.PS POSSM_AP_1.PS POSSM_AP_2.PS POSSM_AP_3.PS

More details on the Images and Modelfits are found in this page.