Epoch 1: bc123l Observe date : 2002AUG09/221 Reduction date : 2003 Mar 21 Using autoaips 1.0.0 on Astrud disk 1 -------------------------------- SUMMARY ---------------------------------- Phase calibrator -- nicely detected Inbeam calibrator 1 marginally detected, phases all over the place first run of calib get 40% solutions Calibrator seems to be a very extended source. Inbeam 2 was dropped in subsequent observations because unusable Pulsar detected without inbeam. Inbeam selfcal solutions decrease SNR and move source by 4 mas. -------------------------- DETAILS OF REDUCTION ----------------------- INBEAM 1 : ib_cal_name1 = B1944+17.16 ib_cal_ra1 = 19:46:20.93679 ib_cal_dec1 = 18:27:32.7358 ib_cal_s14001= 41.1 # mJy ib_cal_sep1 = 23.1 # arcmin 1. XLOAD 2. XAPRIORI 3. spflg sour 'J1935+2031'' docalib 2 gainuse 5 flag1 = ante=5,0;bif=2;eif=2;bchan=23;echan=27; flag2 = ante=3,0;timer=0,3,53,30,0,3,53,50 flag3 = ante=10,0;timer=0,4,56,0,1,0,0,0 flag4 = ante=10,0;bif=1;eif=1;sour='J1935+2031','B1944+17.PT'' apply flags with uvflg 4. XBPASS (using J1935+2031 as bpass calibrator) fringe phase : about 40% failed on MK, SC. Otherwise good. perfect phase connection 5. XPHASE (using J1935+2031 as phase calibrator) 6. Image in-beam #1 inbeam #1 marginally detected but quite resolved! high rms and seemingly hidden structure INBEAM 2 : (performed by WFB) ib_cal_name2 = B1944+17.13 ib_cal_ra2 = 19:45:45.54691 ib_cal_dec2 = 18:15:14.5061 ib_cal_s14002= 8.8 # mJy ib_cal_sep2 = 18.7 # arcmin 1. XLOAD 2. XAPRIORI 3. calxfr = 'ib1' ; run XCOPY 4. Image in-beam #2 Not detected within 0.5 arcsec of position. PULSAR : name = B1944+17 DM = 16.11 epoch = 2000.0 P = 0.44061 # sec dmdist= 0.834696 # kpc S400 = 40 # mJy from pulsar catalog S1400 = 9.9 # mJy from VLA, Feb 7-9, 2002 1. XLOAD 2. XAPRIORI 3. calxfr = 'ib1' ; run XCOPY 4. Image pulsar about 4 mJy (without self-cal) ---------------------------- SOURCE RESULTS ------------------------- B1944+17 pulsar: without inbeam: astrud> JMFIT1: Peak intensity = 3.9888E-03 +/- 1.67E-04 JY/BEAM astrud> JMFIT1: Integral intensity= 5.3728E-03 +/- 3.54E-04 JANSKYS astrud> JMFIT1: X-position = 415.186 +/- 0.1133 pixels astrud> JMFIT1: Y-position = 190.973 +/- 0.2630 pixels astrud> JMFIT1: RA 19 46 53.05290 +/- 0.00001 astrud> JMFIT1: DEC 18 05 41.2355 +/- 0.00032 astrud> JMFIT1: Major axis = 14.906 +/- 0.6227 pixels astrud> JMFIT1: Minor axis = 6.189 +/- 0.2586 pixels astrud> JMFIT1: Position angle = 173.355 +/- 1.698 degrees astrud> JMFIT1: Major axis = 0.01789 +/-0.00075 asec astrud> JMFIT1: Minor axis = 0.00743 +/-0.00031 asec astrud> JMFIT1: Position angle = 173.355 +/- 1.698 degrees with inbeam: (5 min, 40% solutions) astrud> JMFIT1: Peak intensity = 7.7184E-03 +/- 4.60E-04 JY/BEAM astrud> JMFIT1: Integral intensity= 9.8384E-03 +/- 9.41E-04 JANSKYS astrud> JMFIT1: X-position = 381.019 +/- 0.4299 pixels astrud> JMFIT1: Y-position = 203.161 +/- 0.6101 pixels astrud> JMFIT1: RA 19 46 53.05314 +/- 0.00005 astrud> JMFIT1: DEC 18 05 41.2340 +/- 0.00092 astrud> JMFIT1: Major axis = 24.234 +/- 1.4456 pixels astrud> JMFIT1: Minor axis = 16.757 +/- 0.9996 pixels astrud> JMFIT1: Position angle = 171.177 +/- 6.404 degrees astrud> JMFIT1: Major axis = 0.03635 +/-0.00217 asec astrud> JMFIT1: Minor axis = 0.02514 +/-0.00150 asec astrud> JMFIT1: Position angle = 171.177 +/- 6.404 degrees ------------------------------ OBSERVE LOG ---------------------------------- VERY LONG BASELINE ARRAY OBSERVING LOG -------------------------------------- Project: BC123L Observer: S. Chatterjee Project type: VLBA Obs filename: bc123lcrd.* Date/Day: 2002AUG09/221 Ants Used: SC HN NL FD LA PT KP OV BR MK =UT-Time===Comment==============================================MF#===%AD==AMD= Operator is Roy Heatwole. 0332 Begin file. 0332 %BR No weather station data. Broken fiber optic 09267 cable. Will affect calculation of refraction index. 0334 VCLOCK checked okay. 0343-0344 *BR Antenna stopped. Az brake fault. ACU 100 1 0355-0359 *PT Antenna auto stowed. Power failure. WEA 100 4 0533 End. Notes: * = Entries where data was affected. % = Entries where data may have been affected. & = Entries where the site tech was called out. wea = Weather entries: MF# = Maintenance form or major downtime category associated with a problem. %AD = The percentage of an antenna affected by a problem. AMD = Total antenna-minutes downtime for a problem. Tsys = TP/SP x Tcal/2 -------------------------------- TABLE LOG ---------------------------------- CL1 : Given PC1 : Given TY1 : Given GC1 : Given FG1 : Given NX1 : Given NX1* : INDXR -- to un-split scans GC2 : TAMRG TY2 : TAMRG PC2 : TAMRG SN1 : ACCOR CL2 : CLCAL accor (CL1 x SN1) SN2 : APCAL CL3 : CLCAL apcal (CL2 x SN2) CL4 : TACOP CL3 CL4* : CLCOR: pang 1 0 CL5 : TECOR FG1* : UVFLG ante=5,0;bif=2;eif=2;bchan=25;echan=25;timer=0,4,44,40,0,5,5,0 FG1* : UVFLG ante=3,0;timer=0,3,53,30,0,3,53,50 FG1* : UVFLG ante=10,0;timer=0,4,56,0,1,0,0,0 FG1* : UVFLG ante=10,0;bif=1;eif=1;sour='J1935+2031','B1944+17.PT'' SN3 : FRING J1935+2031 SN4 : SNSMO SN3 CL6 : CLCAL fring J1935+2031 (CL5 x SN4) SPLIT J1935+2031 CL6 FG1 BP0 SN5 : FRING J1935+2031 SN6 : SNSMO SN5 CL7 : CLCAL fring J1935+2031 (CL5 x SN6) SN7 : CALIB A&P J1935+2031 CL8 : CLCAL calib A&P J1935+2031 (CL7 x SN7) BP1 : BPASS J1935+2031 SN8 : FRING J1935+2031 SN9 : SNSMO SN8 CL9 : CLCAL fring J1935+2031 (CL5 x SN9) SN10 : CALIB A&P J1935+2031 CL10 : CLCAL calib A&P J1935+2031 (CL9 x SN10) SPLIT J1935+2031 CL10 FG1 BP1 SPLIT B1944+17.PT CL10 FG1 BP1 SPLIT B1944+17.PT CL10 FG1 BP1 SPLIT J2016+1632 CL10 FG1 BP1 SPLIT J1929+2325 CL10 FG1 BP1 SPLIT J1945+0952 CL10 FG1 BP1 SPLIT J2023+2223 CL10 FG1 BP1