# # Template Checklist and Worksheet for reduction of VSOP Survey data. # (http://halca.vsop.isas.ac.jp/survey/template_checklist.txt) # # Version 0.3 - J. Lovell 14-Apr-1999 # # NOTE: Copy this file to your data reduction outputs directory (e.g # /something/vs05a_jones) and name it "checklist.txt" # # Comments are given on lines beginning with a # and questions are # enclosed in {}'s. # Please enter responses after the colons. # Multiple-line responses are OK. # Yes/No questions may be answered with "yes", "no", "Y", "N", "y" or "n" # An example of a completed Checklist is given in # http://halca.vsop.isas.ac.jp/survey/checklist_eg.txt # # #--------------------------------------------------------------------------- # Section 1 : General Information #--------------------------------------------------------------------------- {Experiment code} : VS01s {Your family name} : Scott {Your given name} : William {The date you prepared this document (format is day-month-year, e.g 23-04-1999)} : 09-06-1999 {The name of the survey source that was observed} : 3C446 {The name of the calibration source(s) observed} : 1921-293 {The year the experiment took place (e.g. 1998)} : 1997 {The starting day number of the experiment} : 336 {List the GRTs that observed} : Mo, Sh, Hh {List the tracking stations that took part} : TZ, RZ {Which correlator was used to correlate the data? (Mitaka/Penticton/Socorro)} : Penticton {AIPS Version used (e.g 15OCT98)} : 15APR99 {Difmap Version used (e.g 2.3c)} : 2.3c {Was vsop_difmap used? (yes/no)} : y {Abstract. Write a brief summary of the data reduction and its outcomes} : #--------------------------------------------------------------------------- # Section 2 : Pre-AIPS Checklist #--------------------------------------------------------------------------- {PI letter retrieved (yes/no)} : y {Data quality reports and plots retrieved? (yes/no)} : y {Pre-launch 5GHz survey data retrieved? (yes/no)} : y {Light-curve data retrieved? (yes/no)} : n # Input files for INDXR, ANTAB and UVFLG {Has a INDXR input file (INDXR.TXT) been created? (yes/no)} : y {Has a ANTAB input file (ANTAB.TXT) been created? (yes/no)} : y {Has a UVFLG input file (UVFLG.TXT) been created? (yes/no)} : n {Any comments on Pre-AIPS file preparation?} : #--------------------------------------------------------------------------- # Section 3 : AIPS Output File Checklist # # Names of expected output file names are contained in square brackets. #--------------------------------------------------------------------------- {PRTAN [PRTAN.LIS] (yes/no)} : yes {LISTR (optyp = 'SCAN') [LISTR.LIS] (yes/no)} : yes {DTSUM (aparm = 0) [DTSUM_0.LIS] (yes/no)} : yes {DTSUM (aparm = 1) [DTSUM_1.LIS] (yes/no)} : yes {UVPLT (u vs v) [UVPLT_UV.PS] (yes/no)} : yes {UVPLT ((u,v) distance vs time) [UVPLT_UVD.PS] (yes/no)} : yes {UVPLT ((u,v) position angle vs time). [UVPLT_UVPA.PS] (yes/no)} : yes {VPLOT antenna weights vs time (after adjustment) [WEIGHTS.PS] (yes/no)} : yes {ACCOR SNPLT (amplitude), IF 1 [SN_ACCOR_1.PS] (yes/no)} : no {IF 2 [SN_ACCOR_2.PS] (yes/no)} : no {APCAL SNPLT (amplitude), IF 1 [SN_APCAL_1.PS] (yes/no)} : yes {IF 2 [SN_APCAL_2.PS] (yes/no)} : yes # FRING SNPLT (delay, rate, SNR), as many as necessary to document the # clear discovery of fringes at all antennas, numbered with "nn" for # both IFs. Do NOT include the final SN table as it is plotted later. # # Format is SN_FRINGnn_DEL_i.PS, SN_FRINGnn_RAT_i.PS, # SN_FRINGnn_SNR_i.PS for delay, rate and SNR plots respectively, # where "i" is the IF number (1 or 2). {Number of times preliminary FRING solutions were plotted (i.e maximum value of nn)} : 2 {Post-FRING CALIB SNPLT, Phase: IF 1 [SN_CALIB_PHA_1] (yes/no)} : yes {IF 2 [SN_CALIB_PHA_2] (yes/no)} : yes {Delay: IF 1 [SN_CALIB_DEL_1] (yes/no)} : yes {IF 2 [SN_CALIB_DEL_2] (yes/no)} : yes {Rate: IF 1 [SN_CALIB_RAT_1] (yes/no)} : yes {IF 2 [SN_CALIB_RAT_2] (yes/no)} : yes {SNR: IF 1 [SN_CALIB_SNR_1] (yes/no)} : yes {IF 2 [SN_CALIB_SNR_2] (yes/no)} : yes {Post-calibration VPLOT (amp and phase, with channel averaging) IF 1 [VPLOT_AP_1.PS] (yes/no)} : yes {IF 2 [VPLOT_AP_1.PS] (yes/no)} : yes {Post-calibration POSSM (amplitude and phase, at least one 5 to 10 min integration spectrum per tracking pass, indexed with nn = 01, 02, 03, ...), IF 1 [POSSMnn_AP_1.PS] (yes/no)} : yes {IF 2 [POSSMnn_AP_2.PS] (yes/no)} : yes {Output TASAV FITS file (containing all 'multisource' cal tables) [VSxxx__TASAV.FITS] (yes/no)} : yes {Calibrated and spectrally averaged FITS data files (one for each source), [__AIPS.FITS] (yes/no)} : y #--------------------------------------------------------------------------- # Section 4 : Supplementary files # # Were any files created, other than those listed, to document the data # reduction? If so, please list them below using as many (File, Description) # groups as required. #--------------------------------------------------------------------------- #--------------------------------------------------------- {File} : image.ps.gz {Description} : The final Difmap image (gzipped). #--------------------------------------------------------- #------------------------------------------------------------------------- # Section 5 : AIPS data-reduction notes # # The format is as follows: # # Task : the name of the task that is run or other operation performed # ADVERBs : a list of the relevant non-default adverbs # Input CL : the input calibration table used (if any) in running the task # Input SN : the SN table that was used (if any) # Output SN : the SN table produced (if any) # Output CL : the CL table produced or modified (if any) # Comments: any comments on the results of the operation # # Use as many of the (Task, ADVERBs, Comments, Input CL, Input SN, # Output SN, Output CL) groups as required. #------------------------------------------------------------------------- #--------------------------------------------------------- {Task} : FITLD {ADVERBs} : DIGICOR=DELCOR=-1 {Input CL} : {Input SN} : {Output SN} : {Output CL} : {Comments} : Output file name = VS01S.FITLD #--------------------------------------------------------- #--------------------------------------------------------- {Task} : MSORT {ADVERBs} : {Input CL} : {Input SN} : {Output SN} : {Output CL} : {Comments} : Input file name = VS01S.FITLD, Output file name = VS01S.UVSRT #--------------------------------------------------------- #--------------------------------------------------------- {Task} : FIXWT {ADVERBs} : CPARM(1)=3 CPARM(3)=0.25 = Cl table time interval {Input CL} : {Input SN} : {Output SN} : {Output CL} : 1 {Comments} : Input file name = VS01S.UVSRT, Output file name = VS01S.FIXWT #--------------------------------------------------------- #--------------------------------------------------------- {Task} : INDXR {ADVERBs} : {Input CL} : {Input SN} : {Output SN} : {Output CL} : {Comments} : Created NX(1) #--------------------------------------------------------- #--------------------------------------------------------- {Task} : OBTAB {ADVERBs} : {Input CL} : {Input SN} : {Output SN} : {Output CL} : {Comments} : Not Used #--------------------------------------------------------- #--------------------------------------------------------- {Task} : TBOUT/TBIN {ADVERBs} : {Input CL} : {Input SN} : {Output SN} : {Output CL} : {Comments} : Changed entries in AN(1) for MNTSTA by externally editting the table. Changed VSOP_SC from 3 to 2, Hart from 1 to 0. #--------------------------------------------------------- #--------------------------------------------------------- {Task} : IBLED {ADVERBs} : {Input CL} : {Input SN} : {Output SN} : {Output CL} : {Comments} : Edits stored in FG(1). #--------------------------------------------------------- #--------------------------------------------------------- {Task} : ACCOR {ADVERBs} : {Input CL} : {Input SN} : {Output SN} : {Output CL} : {Comments} : Not Used #--------------------------------------------------------- #--------------------------------------------------------- {Task} : ANTAB {ADVERBs} : {Input CL} : {Input SN} : {Output SN} : {Output CL} : {Comments} : INFILE='CAL:VS01S_CAL.DAT' Output sent to TY(1) and GC(1). Nominal values were used for Mo, DPFU=0.1, Tsys=34K. For Halca, used nominal Tsys' values of 95K, 98K for IFs 1 and 2 respectively. #--------------------------------------------------------- #--------------------------------------------------------- {Task} : APCAL {ADVERBs} : {Input CL} : {Input SN} : 1 {Output SN} : {Output CL} : {Comments} : Input: Ty(1) + GC(1) #--------------------------------------------------------- #--------------------------------------------------------- {Task} : SNSMO {ADVERBs} : {Input CL} : {Input SN} : {Output SN} : {Output CL} : {Comments} : Did not use #--------------------------------------------------------- #--------------------------------------------------------- {Task} : CLCAL {ADVERBs} : OPCODE = CALI INTERPOL = 2PT REFANT 5 (Mopra) {Input CL} : 1 {Input SN} : 1 {Output SN} : {Output CL} : 2 {Comments} : #--------------------------------------------------------- #--------------------------------------------------------- {Task} : TACOP {ADVERBs} : {Input CL} : 2 {Input SN} : {Output SN} : {Output CL} : 3 {Comments} : #--------------------------------------------------------- #--------------------------------------------------------- {Task} : CLCOR {ADVERBs} : ANTENNAS=0 OPCODE=GAIN CLCORPRM=0.9055 GAINVER=3 {Input CL} : 3 {Input SN} : {Output SN} : {Output CL} : 3 {Comments} : #--------------------------------------------------------- #--------------------------------------------------------- {Task} : CLCOR {ADVERBs} : OPCODE='SBDL' ANTENNAS = 4 (Seshan) CLCORPRM= 454, 454 GAINVER=3 {Input CL} : 3 {Input SN} : {Output SN} : {Output CL} : 3 {Comments} : #--------------------------------------------------------- #--------------------------------------------------------- {Task} : CLCOR {ADVERBs} : OPCODE='SBDL' ANTENNAS = 3 (VSOP) CLCORPRM= 200, 200 GAINVER=3 {Input CL} : 3 {Input SN} : {Output SN} : {Output CL} : 3 {Comments} : #--------------------------------------------------------- #--------------------------------------------------------- {Task} : CLCOR {ADVERBs} : OPCODE='SBDL' ANTENNAS = 2 (Hart) CLCORPRM= -1524, -1524 GAINVER=3 {Input CL} : 3 {Input SN} : {Output SN} : {Output CL} : 3 {Comments} : #--------------------------------------------------------- #--------------------------------------------------------- {Task} : FRING {ADVERBs} : APARM(1)=2 APARM(7)=3 (SNR=3) APARM(9)=1 DPARM(1)=1 (no baseline stacking) DPARM(2)=500 (500ns delay window) DPARM(3)=100 (100mHz rate window) DPARM(4)=0.5 (0.5 sec integration time) DPARM(6)=1 (don't average in frequency) BCHAN 0, ECHAN 0 SEARCH 4, 2 REFANT 5 (Mopra) DOCALIB 1 GAINUSE 3 {Input CL} : 3 {Input SN} : {Output SN} : 2 {Output CL} : {Comments} : These are the standard parameters I used (unless otherwise specified). Note: SN(2) was deleted after every trial of FRING except the last (final) trial. #--------------------------------------------------------- #--------------------------------------------------------- {Task} : FRING {ADVERBs} : Standard+ SOLINT=3 DPARM(2) 1000 DPARM(3) 500 CALSOUR '1921-293' DPARM(5)=1 only do FFT solution {Input CL} : 3 {Input SN} : {Output SN} : 2 {Output CL} : {Comments} : Got good solutions for Se-Mp, IF1 (Sh channel 2 was bad). Delay solution were less than 10ns (as expected). Deleted SN(2). #--------------------------------------------------------- #--------------------------------------------------------- {Task} : FRING {ADVERBs} : Standard+ APARM(7) 2 DPARM(2) 5000 DPARM(3) 500 SOLINT=3 TIMER 0 10 0 0 0 10 30 0 DPARM(5)=1 only do FFT solution {Input CL} : 3 {Input SN} : {Output SN} : 2 {Output CL} : {Comments} : All "high" SNR solutions had abs(delay) less than 400ns, so will reduce delay window to 1200ns. All "high" SNR solutions had abs(rate) less than 100MHz, so will reduce rate window to 200mHz. range were DQA1 didn't get them. "Good" Halca solutions had relatively low SNR, so increase solint to 5 minutes. #--------------------------------------------------------- #--------------------------------------------------------- {Task} : FRING {ADVERBs} : Standard+ APARM(7) 2 DPARM(2) 1200 DPARM(3) 200 SOLINT=5 TIMER 0 10 0 0 0 10 30 0 DPARM(5)=1 only do FFT solution {Input CL} : 3 {Input SN} : {Output SN} : 3 {Output CL} : {Comments} : Can reduce rate window down still further, to 100mHz, since abs(rate) for high SNR solutions was less than 30MHz. Halca solutions had slightly higher SNR. #--------------------------------------------------------- #--------------------------------------------------------- {Task} : FRING {ADVERBs} : Standard+ SOLINT 5 DPARM(2) 1200 DPARM(3) 100 APARM(7)=SNR=2 (Can edit out bad solns later) DPARM(3)=200 DPARM(2)=200 {Input CL} : 3 {Input SN} : {Output SN} : 4 {Output CL} : {Comments} : Solutions look good...comparable to DQA1 solutions. #--------------------------------------------------------- #--------------------------------------------------------- {Task} : SNEDT {ADVERBs} : {Input CL} : {Input SN} : 4 {Output SN} : 5 {Output CL} : {Comments} : Editted inconsistent delays and rates. #--------------------------------------------------------- #--------------------------------------------------------- {Task} : CLCAL {ADVERBs} : OPCODE='CALI' INTERPOL = '2PT' {Input CL} : 3 {Input SN} : 5 {Output SN} : {Output CL} : 4 {Comments} : #--------------------------------------------------------- #--------------------------------------------------------- {Task} : CALIB {ADVERBs} : {Input CL} : {Input SN} : {Output SN} : {Output CL} : {Comments} : Not used. #--------------------------------------------------------- #--------------------------------------------------------- {Task} : TASAV {ADVERBs} : {Input CL} : {Input SN} : {Output SN} : {Output CL} : {Comments} : Input file: VS01S.FIXWT, Output file: VS01S.TABLES #--------------------------------------------------------- #--------------------------------------------------------- {Task} : SPLIT {ADVERBs} : SOURCES '3C446' BCHAN 0, ECHAN 0 DOCALIB 1, GAINUSE 4 APARM(1)=2 (average each IF separately) APARM(2)=0.5 APARM(4)=1 {Input CL} : 5 {Input SN} : {Output SN} : {Output CL} : {Comments} : Input file: VS01S.FIXWT, Output file: 3C446.FITS #--------------------------------------------------------- #--------------------------------------------------------- {Task} : FITTP {ADVERBs} : {Input CL} : {Input SN} : {Output SN} : {Output CL} : {Comments} : Input file: VS01S.FITS, Output file: FITS:3C446.FITS #--------------------------------------------------------- #------------------------------------------------------------------------- # Section 6 : Difmap data reduction notes #------------------------------------------------------------------------- {Phase Selfcal applied? (yes/no)} : y {Global Amplitude Selfcal applied? (yes/no)} : y {Amplitude Selfcal applied on non-global timescales? (yes/no)} : n {Modelfit made and saved using the vs_final_mod macro? (yes/no)} : y {Image made and saved using the vs_final_img macro? (yes/no)} : y {Comments on Difmap processing. Include the global amplitude offsets that were applied if gscal was used} : Ran uvaver 30,true (averaged over 30 seconds and redo the weights). Cleaning/Phase self-cal: Cleaned out central component, which turned out to be two closely spaced components. Cleaning/Phase+Amp self-cal: Gscale corrections: IF 1: HARTRAO 0.98 MOP 0.91 SESHAN25 0.97 VSOP_SC 1.11. IF 2: HARTRAO 0.00 MOP 0.00 SESHAN25 0.00 VSOP_SC 0.00. IF2 ampselfcal corrections were all zero, since Se IF 2 was bad. Hence, lost all IF2 data after ampselfcal. Only made one iteration of amp/phase selfcal after gscale. Added model components to the east although I'm not convinced they are real. They are consistent with the jet orientation of lower resolution VLBA images of 3C446 however. Final residual map had an RMS of 2 mJy. Corrections after Gscale were small. Used a very large solint for further amp+phase self-cal since there was only the minimum of 4 antennas to constrain the amp self-cal. Only two iterations of amp+phase self-cal were made. Final residual map had an RMS of 1.6 mJy. Final image: Source was partially resolved out with two central components along an East-West axis. Peak flux was 0.357Jy/beam. #------------------------------------------------------------------------- # Do not delete or alter anything past this line {VSOP Survey Checklist and Worksheet version} : 0.3 #-------------------------------------------------------------------------