# # 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} : VS07g {Your family name} : Shen {Your given name} : Zhi-Qiang {The date you prepared this document (format is day-month-year, e.g 23-04-1999)} : 25-06-1999 {The name of the survey source that was observed} : J1658+07 {The name of the calibration source(s) observed} : 1622-253, 1308+326 {The year the experiment took place (e.g. 1998)} : 1998 {The starting day number of the experiment} : 64 {List the GRTs that observed} : Hobart, Mop, Noto, Seshan25, HartRAO, Kashima {List the tracking stations that took part} : GZ, NZ, TZ {Which correlator was used to correlate the data? (Mitaka/Penticton/Socorro)} : Penticton {AIPS Version used (e.g 15OCT98)} : 15OCT98 {Difmap Version used (e.g 2.3c)} : 2.3c {Was vsop_difmap used? (yes/no)} : yes {Abstract. Write a brief summary of the data reduction and its outcomes} : Strong fringes were easily detected on ground-ground baselines except those to Kashima. Only small part of Kashima data was used for imaging. Hobart gains were multiplied by a factor of ~0.6 to match the adopted DPFU of 0.1 and the measured Tsys of ~300K. There were delay gaps when the tracking stations changed each time. For ground-space baselines, good fringes were found up to ~22:30 (UT) which included part of the TZ pass and an entire GZ pass. For NZ pass from 22:33 (UT) to 22:50 (UT), only some very weak fringes were detected (consistent with the correlator report) and these data were eventually flagged. Both imaging and modelfitting were made to the survey source J1658+07. A single elliptical Gaussian model was applied to fit the calibrator 1622-253. #--------------------------------------------------------------------------- # Section 2 : Pre-AIPS Checklist #--------------------------------------------------------------------------- {PI letter retrieved (yes/no)} : yes {Data quality reports and plots retrieved? (yes/no)} : yes {Pre-launch 5GHz survey data retrieved? (yes/no)} : yes {Light-curve data retrieved? (yes/no)} : yes # Input files for INDXR, ANTAB and UVFLG {Has a INDXR input file (INDXR.TXT) been created? (yes/no)} : yes {Has a ANTAB input file (ANTAB.TXT) been created? (yes/no)} : yes {Has a UVFLG input file (UVFLG.TXT) been created? (yes/no)} : no {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)} : no {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)} : yes #--------------------------------------------------------------------------- # 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} : {Description} : #--------------------------------------------------------- #--------------------------------------------------------------------------- # 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} : douvcomp=1 dotable=1 {Input CL} : {Input SN} : {Output SN} : {Output CL} : {Comments} : load the uv FITS data from tape to AIPS disk #--------------------------------------------------------- {Task} : MSORT {ADVERBs} : sort='TB' {Input CL} : {Input SN} : {Output SN} : {Output CL} : {Comments} : sort the data to 'TB' order #--------------------------------------------------------- {Task} : INDXR {ADVERBs} : cparm(3)=1 {Input CL} : {Input SN} : {Output SN} : {Output CL} : 1 {Comments} : index uv data with 1 min CL entry interval #--------------------------------------------------------- {Task} : TACOP {ADVERBs} : {Input CL} : 1 {Input SN} : {Output SN} : {Output CL} : 2 {Comments} : protect original CL1 #--------------------------------------------------------- {Task} : ANTAB {ADVERBs} : {Input CL} : {Input SN} : {Output SN} : {Output CL} : {Comments} : determine the Tsys and gain curve which are available for most GRTs except Kashima (see ANTAB.TXT file). For Kashima, a Tsys of 55K and a DPFU of 0.23 were used. Tsys of 95K for Halca. #--------------------------------------------------------- {Task} : APCAL {ADVERBs} : opcode=' ' {Input CL} : {Input SN} : {Output SN} : 1 {Output CL} : {Comments} : generate an amplitude calibration solution table #--------------------------------------------------------- {Task} : CLCAL {ADVERBs} : opcode='CALI' interpol=' ' refant=0 {Input CL} : 2 {Input SN} : 1 {Output SN} : {Output CL} : 3 {Comments} : apply amplitude calibration solution #--------------------------------------------------------- {Task} : FRING {ADVERBs} : docalib=1 flagv=0 refant=4 solint=4 aparm=2, 0, 0, 0, 0, 1, 2, 0 dparm=3, 0, 0, 0, 1, 0 antwt=1, 1, 1, 1, 1, 10, 1 {Input CL} : 3 {Input SN} : {Output SN} : 3 {Output CL} : {Comments} : solve residual delay/rate (FFT only, i.e. dparm(5)=1) on the entire dataset with SNR=2 #--------------------------------------------------------- {Task} : TACOP {ADVERBs} : {Input CL} : {Input SN} : 3 {Output SN} : 4 {Output CL} : {Comments} : save solution by making a copy #--------------------------------------------------------- {Task} : SNEDT {ADVERBs} : {Input CL} : {Input SN} : 4 {Output SN} : 12 {Output CL} : {Comments} : edit (flag/smooth) SN table interactively (mainly for the solutions to Halca antenna!) #--------------------------------------------------------- {Task} : CLCAL {ADVERBs} : opcode='CALP' interpol='AMBG' smotype='VLBI' refant=4 cals=sour='J1658+07' (cals=sour='1622-253' cals=sour='1308+326') {Input CL} : 3 {Input SN} : 12 {Output SN} : {Output CL} : 4 {Comments} : run 3 times (once for each source) #--------------------------------------------------------- {Task} : FRING {ADVERBs} : docalib=1 flagv=1 refant=4 solint=4 aparm=2, 0, 0, 0, 0, 1, 3, 0 dparm=1, 500, 250, 0 antwt=1, 1, 1, 1, 1, 10, 1 {Input CL} : 4 {Input SN} : {Output SN} : 13 {Output CL} : {Comments} : fringe fit (FFT+LLS) in narrow searching windows with SNR cutoff=3 #--------------------------------------------------------- {Task} : CLCAL {ADVERBs} : opcode='CALP' interpol='AMBG' smotype='VLBI refant= 4 cals=sour='J1658+07' (cals=sour='1622-253' cals=sour='1308+326') {Input CL} : 4 {Input SN} : 13 {Output SN} : {Output CL} : 5 {Comments} : run 3 times (once for each source) #--------------------------------------------------------- {Task} : TACOP {ADVERBs} : {Input CL} : 5 {Input SN} : {Output SN} : {Output CL} : 6 {Comments} : protect CL5 #--------------------------------------------------------- {Task} : CLCOR {ADVERBs} : antenna=0 opcode='GAIN' clcorprm=0.91,0 {Input CL} : 6 {Input SN} : {Output SN} : {Output CL} : 6 {Comments} : Penticton gain correction #--------------------------------------------------------- {Task} : TACOP {ADVERBs} : {Input CL} : 6 {Input SN} : {Output SN} : {Output CL} : 7 {Comments} : protect CL6 #--------------------------------------------------------- {Task} : CLCOR {ADVERBs} : antenna=0 opcode='GAIN' antenna=1, 0 clcorprm=0.6, 0 (antenna=7, 0 clcorprm=25, 0) {Input CL} : 7 {Input SN} : {Output SN} : {Output CL} : 7 {Comments} : run 2 times: one for Hobart (antenna=1) and one for Kashima (antenna=25). These were determined from trial run of DIFMAP through running gscale and checking the data at the uv-crossing points. #--------------------------------------------------------- {Task} : TASAV {ADVERBs} : {Input CL} : {Input SN} : {Output SN} : {Output CL} : {Comments} : copy all extension tables to a dummy file #--------------------------------------------------------- {Task} : SPLIT {ADVERBs} : docalib=1 douvcomp=1 aparm= 2, 0, 0, 1, 0 {Input CL} : 7 {Input SN} : {Output SN} : {Output CL} : {Comments} : make calibrated single-source data files: J1658+07.SPLIT, 1622-253.SPLIT and 1308+326.SPLIT #--------------------------------------------------------- {Task} : FITTP {ADVERBs} : {Input CL} : {Input SN} : {Output SN} : {Output CL} : {Comments} : export each single-source file in FITS format to disk file for further imaging analysis #--------------------------------------------------------- #--------------------------------------------------------------------------- # Section 6 : Difmap data reduction notes #--------------------------------------------------------------------------- {Phase Selfcal applied? (yes/no)} : yes {Global Amplitude Selfcal applied? (yes/no)} : yes {Amplitude Selfcal applied on non-global timescales? (yes/no)} : yes {Modelfit made and saved using the vs_final_mod macro? (yes/no)} : yes {Image made and saved using the vs_final_img macro? (yes/no)} : yes {Comments on Difmap processing. Include the global amplitude offsets that were applied if gscal was used} : average data over 30 sec (uvaver 30,true) clean and phase self-cal with uniform weighting (uvw 2,-1 ... etc) switch to natural weighting to clean more flux (uvw 0,-1 ... etc) try gscale (gscale true) HOBART 0.93 MOP 1.00 NOTO 0.98 SESHAN25 1.02 HARTRAO 1.05 VSOP_SC 1.02 KASHIMA 1.07 HOBART 0.96 MOP 1.01 NOTO 0.98 SESHAN25 1.03 HARTRAO 1.07 VSOP_SC 1.00 KASHIMA 1.05 carry out a 120-minute amp+phase self-cal (selfcal true,true,120) switch back to obtain a uniform weighting clean image: peak=0.441 Jy/beam, RMS=1.6 mJy/beam; beam=0.845 mas x 0.304 mas @ 14.6 deg Both circular and elliptical components were tried to fit the calibrated data and no obvious difference was found. So, a model of 3 circular components was accepted. For calibrator 1622-253, the limited data set (one 17-min scan of 5 GRTs) makes imaging impossible. Instead, a model fitting was tried with a single elliptical Gaussian component: Flux=0.90Jy, Major=0.60mas, Axial ratio=0.69, Phi=-5.4 deg . For calibrator 1308+326, no attempt for any further data analysis was made because of its very limited data set (one 15-min scan of 3 GRTs i.e., Noto, Seshan25 and HartRAO). #--------------------------------------------------------------------------- # Do not delete or alter anything past this line {VSOP Survey Checklist and Worksheet version} : 0.3 #---------------------------------------------------------------------------