""" This script was written for CASA 5.1.1 Datasets calibrated (in order of date observed): SB1: 2016.1.00484.L Observed 09 May 2017 (1 execution block) LB1: 2016.1.00484.L Observed 09 September 2017 and 20 September 2017 (2 execution blocks) reducer: S. Andrews """ """ Starting matter """ import os execfile('reduction_utils.py') skip_plots = True # if True, can run script non-interactively """ Input for loading data """ prefix = 'WaOph6' SB1_path = '/full_path/to_calibrated/msfile.ms' LB1_path = '/full_path/to_calibrated/msfile.ms' # Note that if you are downloading data from the archive, your SPW numbering # may differ from this script, depending on how you split your data out! data_params = {'SB1': {'vis' : SB1_path, 'name' : 'SB1', 'field': 'Wa_Oph_6', 'line_spws': np.array([0]), # CO SPWs 'line_freqs': np.array([2.30538e11]), }, 'LB1': {'vis' : LB1_path, 'name' : 'LB1', 'field' : 'Wa_Oph_6', 'line_spws': np.array([3,7]), # CO SPWs 'line_freqs': np.array([2.30538e11, 2.30538e11]), } } """ Check data (various options here; an example) """ if not skip_plots: for i in data_params.keys(): plotms(vis=data_params[i]['vis'], xaxis='channel', yaxis='amplitude', field=data_params[i]['field'], ydatacolumn='data', avgtime='1e8', avgscan=True, avgbaseline=True, iteraxis='spw') """ Identify 50 km/s-wide region containing CO emission; then flag that and do a spectral average to a pseudo-continuum MS """ for i in data_params.keys(): flagchannels_string = get_flagchannels(data_params[i], prefix, velocity_range=np.array([-15, 25])) avg_cont(data_params[i], prefix, flagchannels=flagchannels_string) """ Define simple masks and clean scales for imaging """ mask_pa = 162 # position angle of mask in degrees mask_maj = 1.3 # semimajor axis of mask in arcsec mask_min = 1.0 # semiminor axis of mask in arcsec mask_ra = '16h48m45.62s' mask_dec = '-14.16.36.26' SB1_mask = 'ellipse[[%s, %s], [%.1farcsec, %.1farcsec], %.1fdeg]' % \ (mask_ra, mask_dec, mask_maj, mask_min, mask_pa) LB1_mask = 'ellipse[[%s, %s], [%.1farcsec, %.1farcsec], %.1fdeg]' % \ (mask_ra, mask_dec, mask_maj, mask_min, mask_pa) SB_scales = [0, 5, 10, 20] LB_scales = [0, 5, 20, 60, 120, 240] if not skip_plots: """ Image each dataset individually """ # images are saved in the format prefix+'_name_initcont_exec#.ms' image_each_obs(data_params['SB1'], prefix, mask=SB1_mask, scales=SB_scales, threshold='0.15mJy', interactive=False) image_each_obs(data_params['LB1'], prefix, mask=LB1_mask, scales=LB_scales, threshold='0.06mJy', interactive=False) """ Fit Gaussians to roughly estimate centers, inclinations, PAs """ fit_gaussian(prefix+'_SB1_initcont_exec0.image', region=SB1_mask) #Peak : ICRS 16h48m45.620861s -14d16m36.27068s fit_gaussian(prefix+'_LB1_initcont_exec0.image', region=LB1_mask) #Peak : ICRS 16h48m45.619925s -14d16m36.23235s fit_gaussian(prefix+'_LB1_initcont_exec1.image', region=LB1_mask) #Peak : ICRS 16h48m45.621789s -14d16m36.25788s #PA of Gaussian component: 161.80 deg #Inclination of Gaussian component: 42.55 deg """ This is a tough case. The 1st LB execution has particularly awful phase noise that makes it look like there's a considerable centroid shift. But it is not obvious that the emission is really shifted. After extensive experimentation using various shifts, we concluded that the shift is due to the noise; it indeed is corrected during phase self-cal. """ """ Split out individual MSs for each execution """ split_all_obs(prefix+'_SB1_initcont.ms', prefix+'_SB1_initcont_exec') split_all_obs(prefix+'_LB1_initcont.ms', prefix+'_LB1_initcont_exec') """ Inspect the flux calibration. """ if not skip_plots: """ Assign rough emission geometry parameters and centers. """ PA, incl = 162, 43 phasecenter = au.radec2deg('16:48:45.63800, -14.16.35.90000') peakpos = au.radec2deg('16:48:45.622, -14.16.36.258') offsets = au.angularSeparation(peakpos[0], peakpos[1], phasecenter[0], phasecenter[1], True) offx, offy = 3600.*offsets[3], 3600.*offsets[2] """ Export MS contents into Numpy save files """ for msfile in [prefix+'_SB1_initcont_exec0.ms', prefix+'_LB1_initcont_exec0.ms', prefix+'_LB1_initcont_exec1.ms']: export_MS(msfile) """ Plot deprojected visibility profiles for all data together """ plot_deprojected([prefix+'_SB1_initcont_exec0.vis.npz', prefix+'_LB1_initcont_exec0.vis.npz', prefix+'_LB1_initcont_exec1.vis.npz'], fluxscale=[1.0, 1.0, 1.0], offx=offx, offy=offy, PA=PA, incl=incl, show_err=False) """ Now inspect offsets by comparing against a reference """ estimate_flux_scale(reference=prefix+'_SB1_initcont_exec0_shift.vis.npz', comparison=prefix+'_LB1_initcont_exec0_shift.vis.npz', offx=offx, offy=offy, incl=incl, PA=PA) #Baseline-dependent discrepancies, due to phase noise (fixed w/ self-cal). estimate_flux_scale(reference=prefix+'_SB1_initcont_exec0_shift.vis.npz', comparison=prefix+'_LB1_initcont_exec1_shift.vis.npz', offx=offx, offy=offy, incl=incl, PA=PA) #The ratio of comparison : reference is 0.93673 #The scaling factor for gencal is 0.968 for your comparison measurement """ Correct the flux scales where appropriate. """ rescale_flux(prefix+'_LB1_initcont_exec1.ms', [0.968]) """ SELF-CAL for short-baseline data """ """ Merge the SB executions back into a single MS """ SB_cont_p0 = prefix+'_SB_contp0' os.system('rm -rf %s*' % SB_cont_p0) os.system('cp -r '+prefix+'_SB1_initcont_exec0.ms '+SB_cont_p0+'.ms') """ Set up a clean mask """ mask_ra = '16h48m45.622s' mask_dec = '-14.16.36.258' common_mask = 'ellipse[[%s, %s], [%.1farcsec, %.1farcsec], %.1fdeg]' % \ (mask_ra, mask_dec, mask_maj, mask_min, mask_pa) """ Initial clean """ tclean_wrapper(vis=SB_cont_p0+'.ms', imagename=SB_cont_p0, mask=common_mask, scales=SB_scales, threshold='0.15mJy', savemodel='modelcolumn') """ Define a noise annulus, measure the peak SNR in map """ noise_annulus = "annulus[[%s, %s],['%.2farcsec', '4.25arcsec']]" % \ (mask_ra, mask_dec, 1.1*mask_maj) estimate_SNR(SB_cont_p0+'.image', disk_mask=common_mask, noise_mask=noise_annulus) #WaOph6_SB_contp0.image #Beam 0.265 arcsec x 0.234 arcsec (-87.64 deg) #Flux inside disk mask: 159.09 mJy #Peak intensity of source: 39.60 mJy/beam #rms: 1.62e-01 mJy/beam #Peak SNR: 244.98 """ Self-calibration parameters """ SB_contspws = '0~3' SB_refant = 'DA49, DA59' SB1_obs0_timerange = '2017/05/08/00~2017/05/10/00' """ First round of phase-only self-cal (short baselines only) """ SB_p1 = prefix+'_SB.p1' os.system('rm -rf '+SB_p1) gaincal(vis=SB_cont_p0+'.ms', caltable=SB_p1, gaintype='T', spw=SB_contspws, refant=SB_refant, calmode='p', solint='30s', minsnr=1.5, minblperant=4) if not skip_plots: """ Inspect gain tables """ plotcal(caltable=SB_p1, xaxis='time', yaxis='phase',subplot=441, iteration='antenna', timerange=SB1_obs0_timerange, plotrange=[0,0,-180,180]) """ Apply the solutions """ applycal(vis=SB_cont_p0+'.ms', spw=SB_contspws, gaintable=[SB_p1], interp='linearPD', calwt=True) """ Split off a corrected MS """ SB_cont_p1 = prefix+'_SB_contp1' os.system('rm -rf %s*' % SB_cont_p1) split(vis=SB_cont_p0+'.ms', outputvis=SB_cont_p1+'.ms', datacolumn='corrected') """ Image the results; check the resulting map """ tclean_wrapper(vis=SB_cont_p1+'.ms', imagename=SB_cont_p1, mask=common_mask, scales=SB_scales, threshold='0.1mJy', savemodel='modelcolumn') estimate_SNR(SB_cont_p1+'.image', disk_mask=common_mask, noise_mask=noise_annulus) #WaOph6_SB_contp1.image #Beam 0.265 arcsec x 0.234 arcsec (-87.63 deg) #Flux inside disk mask: 161.91 mJy #Peak intensity of source: 41.11 mJy/beam #rms: 4.93e-02 mJy/beam #Peak SNR: 834.22 """ Second round of phase-only self-cal (short baselines only) """ SB_p2 = prefix+'_SB.p2' os.system('rm -rf '+SB_p2) gaincal(vis=SB_cont_p1+'.ms', caltable=SB_p2, gaintype='T', spw=SB_contspws, refant=SB_refant, calmode='p', solint='18s', minsnr=1.5, minblperant=4) if not skip_plots: """ Inspect gain tables """ plotcal(caltable=SB_p2, xaxis='time', yaxis='phase', subplot=441, iteration='antenna', timerange=SB1_obs0_timerange, plotrange=[0,0,-180,180]) """ Apply the solutions """ applycal(vis=SB_cont_p1+'.ms', spw=SB_contspws, gaintable=[SB_p2], interp='linearPD', calwt=True) """ Split off a corrected MS """ SB_cont_p2 = prefix+'_SB_contp2' os.system('rm -rf %s*' % SB_cont_p2) split(vis=SB_cont_p1+'.ms', outputvis=SB_cont_p2+'.ms', datacolumn='corrected') """ Image the results; check the resulting map """ tclean_wrapper(vis=SB_cont_p2+'.ms', imagename=SB_cont_p2, mask=common_mask, scales=SB_scales, threshold='0.07mJy', savemodel='modelcolumn') estimate_SNR(SB_cont_p2+'.image', disk_mask=common_mask, noise_mask=noise_annulus) #WaOph6_SB_contp2.image #Beam 0.265 arcsec x 0.234 arcsec (-87.63 deg) #Flux inside disk mask: 162.01 mJy #Peak intensity of source: 41.24 mJy/beam #rms: 4.17e-02 mJy/beam #Peak SNR: 987.98 """ Third round of phase-only self-cal (short baselines only) """ SB_p3 = prefix+'_SB.p3' os.system('rm -rf '+SB_p3) gaincal(vis=SB_cont_p2+'.ms', caltable=SB_p3, gaintype='T', spw=SB_contspws, refant=SB_refant, calmode='p', solint='int', minsnr=1.5, minblperant=4) if not skip_plots: """ Inspect gain tables """ plotcal(caltable=SB_p3, xaxis='time', yaxis='phase', subplot=441, iteration='antenna', timerange=SB1_obs0_timerange, plotrange=[0,0,-180,180]) """ Apply the solutions """ applycal(vis=SB_cont_p2+'.ms', spw=SB_contspws, gaintable=[SB_p3], interp='linearPD', calwt=True) """ Split off a corrected MS """ SB_cont_p3 = prefix+'_SB_contp3' os.system('rm -rf %s*' % SB_cont_p3) split(vis=SB_cont_p2+'.ms', outputvis=SB_cont_p3+'.ms', datacolumn='corrected') """ Image the results; check the resulting map """ tclean_wrapper(vis=SB_cont_p3+'.ms', imagename=SB_cont_p3, mask=common_mask, scales=SB_scales, threshold='0.07mJy', savemodel='modelcolumn') estimate_SNR(SB_cont_p3+'.image', disk_mask=common_mask, noise_mask=noise_annulus) #WaOph6_SB_contp3.image #Beam 0.265 arcsec x 0.234 arcsec (-87.63 deg) #Flux inside disk mask: 162.19 mJy #Peak intensity of source: 41.43 mJy/beam #rms: 3.96e-02 mJy/beam #Peak SNR: 1046.38 """ Amplitude self-cal (short baselines only) """ SB_ap = prefix+'_SB.ap' os.system('rm -rf '+SB_ap) gaincal(vis=SB_cont_p3+'.ms', caltable=SB_ap, gaintype='T', spw=SB_contspws, refant=SB_refant, calmode='ap', solint='inf', minsnr=3.0, minblperant=4, solnorm=False) if not skip_plots: """ Inspect gain tables """ plotcal(caltable=SB_ap, xaxis='time', yaxis='amp', subplot=441, iteration='antenna', timerange=SB1_obs0_timerange, plotrange=[0,0,0,2]) """ Apply the solutions """ applycal(vis=SB_cont_p3+'.ms', spw=SB_contspws, gaintable=[SB_ap], interp='linearPD', calwt=True) """ Split off a corrected MS """ SB_cont_ap = prefix+'_SB_contap' os.system('rm -rf %s*' % SB_cont_ap) split(vis=SB_cont_p3+'.ms', outputvis=SB_cont_ap+'.ms', datacolumn='corrected') """ Image the results; check the resulting map """ tclean_wrapper(vis=SB_cont_ap+'.ms', imagename=SB_cont_ap, mask=common_mask, scales=SB_scales, threshold='0.07mJy', savemodel='modelcolumn') estimate_SNR(SB_cont_ap+'.image', disk_mask=common_mask, noise_mask=noise_annulus) #WaOph6_SB_contap.image #Beam 0.265 arcsec x 0.233 arcsec (-87.21 deg) #Flux inside disk mask: 161.67 mJy #Peak intensity of source: 41.23 mJy/beam #rms: 2.95e-02 mJy/beam #Peak SNR: 1399.74 """ SELF-CAL for the combined (short-baseline + long-baseline) data """ """ Merge the SB+LB executions into a single MS """ combined_cont_p0 = prefix+'_combined_contp0' os.system('rm -rf %s*' % combined_cont_p0) concat(vis=[SB_cont_ap+'.ms', prefix+'_LB1_initcont_exec0.ms', prefix+'_LB1_initcont_exec1_rescaled.ms'], concatvis=combined_cont_p0+'.ms', dirtol='0.1arcsec', copypointing=False) """ Initial clean """ tclean_wrapper(vis=combined_cont_p0+'.ms', imagename=combined_cont_p0, mask=common_mask, scales=LB_scales, threshold='0.05mJy', savemodel='modelcolumn') estimate_SNR(combined_cont_p0+'.image', disk_mask=common_mask, noise_mask=noise_annulus) #WaOph6_combined_contp0.image #Beam 0.073 arcsec x 0.038 arcsec (-76.36 deg) #Flux inside disk mask: 161.78 mJy #Peak intensity of source: 4.96 mJy/beam #rms: 2.51e-02 mJy/beam #Peak SNR: 197.33 """ Self-calibration parameters """ combined_contspws = '0~11' combined_refant = 'DV09@A007,DA61@A015,DV06@A027,DA49@A002,DA59@A001' combined_spwmap = [0,0,0,0,4,4,4,4,8,8,8,8] LB1_obs0_timerange = '2017/09/08/00~2017/09/10/00' LB2_obs1_timerange = '2017/09/19/00~2017/09/21/00' """ First round of phase-only self-cal (all data) """ combined_p1 = prefix+'_combined.p1' os.system('rm -rf '+combined_p1) gaincal(vis=combined_cont_p0+'.ms', caltable=combined_p1, gaintype='T', combine='spw,scan', spw=combined_contspws, refant=combined_refant, calmode='p', solint='900s', minsnr=1.5, minblperant=4) if not skip_plots: """ Inspect gain tables """ plotcal(caltable=combined_p1, xaxis='time', yaxis='phase', subplot=441, iteration='antenna', timerange=LB1_obs0_timerange, plotrange=[0,0,-180,180]) plotcal(caltable=combined_p1, xaxis='time', yaxis='phase', subplot=441, iteration='antenna', timerange=LB2_obs1_timerange, plotrange=[0,0,-180,180]) """ Apply the solutions """ applycal(vis=combined_cont_p0+'.ms', spw=combined_contspws, spwmap=combined_spwmap, gaintable=[combined_p1], interp='linearPD', calwt=True, applymode='calonly') """ Split off a corrected MS """ combined_cont_p1 = prefix+'_combined_contp1' os.system('rm -rf %s*' % combined_cont_p1) split(vis=combined_cont_p0+'.ms', outputvis=combined_cont_p1+'.ms', datacolumn='corrected') """ Image the results; check the resulting map """ tclean_wrapper(vis=combined_cont_p1+'.ms', imagename=combined_cont_p1, mask=common_mask, scales=LB_scales, threshold='0.04mJy', savemodel='modelcolumn') estimate_SNR(combined_cont_p1+'.image', disk_mask=common_mask, noise_mask=noise_annulus) #WaOph6_combined_contp1.image #Beam 0.073 arcsec x 0.038 arcsec (-76.36 deg) #Flux inside disk mask: 161.86 mJy #Peak intensity of source: 6.10 mJy/beam #rms: 1.92e-02 mJy/beam #Peak SNR: 318.18 """ Second round of phase-only self-cal (all data) """ combined_p2 = prefix+'_combined.p2' os.system('rm -rf '+combined_p2) gaincal(vis=combined_cont_p1+'.ms', caltable=combined_p2, gaintype='T', combine='spw,scan', spw=combined_contspws, refant=combined_refant, calmode='p', solint='360s', minsnr=1.5, minblperant=4) if not skip_plots: """ Inspect gain tables """ plotcal(caltable=combined_p2, xaxis='time', yaxis='phase', subplot=441, iteration='antenna', timerange=LB1_obs0_timerange, plotrange=[0,0,-180,180]) plotcal(caltable=combined_p2, xaxis='time', yaxis='phase', subplot=441, iteration='antenna', timerange=LB2_obs1_timerange, plotrange=[0,0,-180,180]) """ Apply the solutions """ applycal(vis=combined_cont_p1+'.ms', spw=combined_contspws, spwmap=combined_spwmap, gaintable=[combined_p2], interp='linearPD', calwt=True, applymode='calonly') """ Split off a corrected MS """ combined_cont_p2 = prefix+'_combined_contp2' os.system('rm -rf %s*' % combined_cont_p2) split(vis=combined_cont_p1+'.ms', outputvis=combined_cont_p2+'.ms', datacolumn='corrected') """ Image the results; check the resulting map """ tclean_wrapper(vis=combined_cont_p2+'.ms', imagename=combined_cont_p2, mask=common_mask, scales=LB_scales, threshold='0.04mJy', savemodel='modelcolumn') estimate_SNR(combined_cont_p2+'.image', disk_mask=common_mask, noise_mask=noise_annulus) #WaOph6_combined_contp2.image #Beam 0.073 arcsec x 0.038 arcsec (-76.36 deg) #Flux inside disk mask: 161.44 mJy #Peak intensity of source: 6.66 mJy/beam #rms: 1.61e-02 mJy/beam #Peak SNR: 413.37 """ Third round of phase-only self-cal (all data) """ combined_p3 = prefix+'_combined.p3' os.system('rm -rf '+combined_p3) gaincal(vis=combined_cont_p2+'.ms', caltable=combined_p3, gaintype='T', combine='spw,scan', spw=combined_contspws, refant=combined_refant, calmode='p', solint='180s', minsnr=1.5, minblperant=4) if not skip_plots: """ Inspect gain tables """ plotcal(caltable=combined_p3, xaxis='time', yaxis='phase', subplot=441, iteration='antenna', timerange=LB1_obs0_timerange, plotrange=[0,0,-180,180]) plotcal(caltable=combined_p3, xaxis='time', yaxis='phase', subplot=441, iteration='antenna', timerange=LB2_obs1_timerange, plotrange=[0,0,-180,180]) """ Apply the solutions """ applycal(vis=combined_cont_p2+'.ms', spw=combined_contspws, spwmap=combined_spwmap, gaintable=[combined_p3], interp='linearPD', calwt=True, applymode='calonly') """ Split off a corrected MS """ combined_cont_p3 = prefix+'_combined_contp3' os.system('rm -rf %s*' % combined_cont_p3) split(vis=combined_cont_p2+'.ms', outputvis=combined_cont_p3+'.ms', datacolumn='corrected') """ Image the results; check the resulting map """ tclean_wrapper(vis=combined_cont_p3+'.ms', imagename=combined_cont_p3, mask=common_mask, scales=LB_scales, threshold='0.03mJy', savemodel='modelcolumn') estimate_SNR(combined_cont_p3+'.image', disk_mask=common_mask, noise_mask=noise_annulus) #WaOph6_combined_contp3.image #Beam 0.073 arcsec x 0.038 arcsec (-76.36 deg) #Flux inside disk mask: 161.13 mJy #Peak intensity of source: 7.05 mJy/beam #rms: 1.49e-02 mJy/beam #Peak SNR: 474.60 """ Fourth round of phase-only self-cal (all data) """ combined_p4 = prefix+'_combined.p4' os.system('rm -rf '+combined_p4) gaincal(vis=combined_cont_p3+'.ms', caltable=combined_p4, gaintype='T', combine='spw,scan', spw=combined_contspws, refant=combined_refant, calmode='p', solint='60s', minsnr=1.5, minblperant=4) if not skip_plots: """ Inspect gain tables """ plotcal(caltable=combined_p4, xaxis='time', yaxis='phase', subplot=441, iteration='antenna', timerange=LB1_obs0_timerange, plotrange=[0,0,-180,180]) plotcal(caltable=combined_p4, xaxis='time', yaxis='phase', subplot=441, iteration='antenna', timerange=LB2_obs1_timerange, plotrange=[0,0,-180,180]) """ Apply the solutions """ applycal(vis=combined_cont_p3+'.ms', spw=combined_contspws, spwmap=combined_spwmap, gaintable=[combined_p4], interp='linearPD', calwt=True, applymode='calonly') """ Split off a corrected MS """ combined_cont_p4 = prefix+'_combined_contp4' os.system('rm -rf %s*' % combined_cont_p4) split(vis=combined_cont_p3+'.ms', outputvis=combined_cont_p4+'.ms', datacolumn='corrected') """ Image the results; check the resulting map """ tclean_wrapper(vis=combined_cont_p4+'.ms', imagename=combined_cont_p4, mask=common_mask, scales=LB_scales, threshold='0.03mJy', savemodel='modelcolumn') estimate_SNR(combined_cont_p4+'.image', disk_mask=common_mask, noise_mask=noise_annulus) #WaOph6_combined_contp4.image #Beam 0.073 arcsec x 0.038 arcsec (-76.36 deg) #Flux inside disk mask: 161.10 mJy #Peak intensity of source: 7.48 mJy/beam #rms: 1.36e-02 mJy/beam #Peak SNR: 549.49 """ Fifth round of phase-only self-cal (all data) """ combined_p5 = prefix+'_combined.p5' os.system('rm -rf '+combined_p5) gaincal(vis=combined_cont_p4+'.ms', caltable=combined_p5, gaintype='T', combine='spw,scan', spw=combined_contspws, refant=combined_refant, calmode='p', solint='30s', minsnr=1.5, minblperant=4) if not skip_plots: """ Inspect gain tables """ plotcal(caltable=combined_p5, xaxis='time', yaxis='phase', subplot=441, iteration='antenna', timerange=LB1_obs0_timerange, plotrange=[0,0,-180,180]) plotcal(caltable=combined_p5, xaxis='time', yaxis='phase', subplot=441, iteration='antenna', timerange=LB2_obs1_timerange, plotrange=[0,0,-180,180]) """ Apply the solutions """ applycal(vis=combined_cont_p4+'.ms', spw=combined_contspws, spwmap=combined_spwmap, gaintable=[combined_p5], interp='linearPD', calwt=True, applymode='calonly') """ Split off a corrected MS """ combined_cont_p5 = prefix+'_combined_contp5' os.system('rm -rf %s*' % combined_cont_p5) split(vis=combined_cont_p4+'.ms', outputvis=combined_cont_p5+'.ms', datacolumn='corrected') """ Image the results; check the resulting map """ tclean_wrapper(vis=combined_cont_p5+'.ms', imagename=combined_cont_p5, mask=common_mask, scales=LB_scales, threshold='0.03mJy', savemodel='modelcolumn') estimate_SNR(combined_cont_p5+'.image', disk_mask=common_mask, noise_mask=noise_annulus) #WaOph6_combined_contp5.image #Beam 0.073 arcsec x 0.038 arcsec (-76.36 deg) #Flux inside disk mask: 160.98 mJy #Peak intensity of source: 7.66 mJy/beam #rms: 1.35e-02 mJy/beam #Peak SNR: 568.77 """ Sixth round of phase-only self-cal (all data) """ combined_p6 = prefix+'_combined.p6' os.system('rm -rf '+combined_p6) gaincal(vis=combined_cont_p5+'.ms', caltable=combined_p6, gaintype='T', combine='spw,scan', spw=combined_contspws, refant=combined_refant, calmode='p', solint='18s', minsnr=1.5, minblperant=4) if not skip_plots: """ Inspect gain tables """ plotcal(caltable=combined_p6, xaxis='time', yaxis='phase', subplot=441, iteration='antenna', timerange=LB1_obs0_timerange, plotrange=[0,0,-180,180]) plotcal(caltable=combined_p6, xaxis='time', yaxis='phase', subplot=441, iteration='antenna', timerange=LB2_obs1_timerange, plotrange=[0,0,-180,180]) """ Apply the solutions """ applycal(vis=combined_cont_p5+'.ms', spw=combined_contspws, spwmap=combined_spwmap, gaintable=[combined_p6], interp='linearPD', calwt=True, applymode='calonly') """ Split off a corrected MS """ combined_cont_p6 = prefix+'_combined_contp6' os.system('rm -rf %s*' % combined_cont_p6) split(vis=combined_cont_p5+'.ms', outputvis=combined_cont_p6+'.ms', datacolumn='corrected') """ Image the results; check the resulting map """ tclean_wrapper(vis=combined_cont_p6+'.ms', imagename=combined_cont_p6, mask=common_mask, scales=LB_scales, threshold='0.025mJy', savemodel='modelcolumn') estimate_SNR(combined_cont_p6+'.image', disk_mask=common_mask, noise_mask=noise_annulus) #WaOph6_combined_contp6.image #Beam 0.073 arcsec x 0.038 arcsec (-76.36 deg) #Flux inside disk mask: 161.15 mJy #Peak intensity of source: 7.74 mJy/beam #rms: 1.34e-02 mJy/beam #Peak SNR: 578.61 """ Amplitude self-cal (all data) """ combined_ap = prefix+'_combined.ap' os.system('rm -rf '+combined_ap) gaincal(vis=combined_cont_p6+'.ms', caltable=combined_ap, gaintype='T', combine='spw,scan', spw=combined_contspws, refant=combined_refant, calmode='ap', solint='900s', minsnr=3.0, minblperant=4, solnorm=False) if not skip_plots: """ Inspect gain tables """ plotcal(caltable=combined_ap, xaxis='time', yaxis='amp', subplot=441, iteration='antenna', timerange=LB1_obs0_timerange, plotrange=[0,0,0,2]) plotcal(caltable=combined_ap, xaxis='time', yaxis='amp', subplot=441, iteration='antenna', timerange=LB2_obs1_timerange, plotrange=[0,0,0,2]) """ Apply the solutions """ applycal(vis=combined_cont_p6+'.ms', spw=combined_contspws, spwmap=combined_spwmap, gaintable=[combined_ap], interp='linearPD', calwt=True, applymode='calonly') """ Split off a corrected MS """ combined_cont_ap = prefix+'_combined_contap' os.system('rm -rf %s*' % combined_cont_ap) split(vis=combined_cont_p6+'.ms', outputvis=combined_cont_ap+'.ms', datacolumn='corrected') """ Image the results; check the resulting map """ tclean_wrapper(vis=combined_cont_ap+'.ms', imagename=combined_cont_ap, mask=common_mask, scales=LB_scales, threshold='0.02mJy', savemodel='modelcolumn') estimate_SNR(combined_cont_ap+'.image', disk_mask=common_mask, noise_mask=noise_annulus) #WaOph6_combined_contap.image #Beam 0.070 arcsec x 0.037 arcsec (-77.58 deg) #Flux inside disk mask: 161.30 mJy #Peak intensity of source: 7.45 mJy/beam #rms: 1.30e-02 mJy/beam #Peak SNR: 575.11 # ** map quality much improved ** """ Final outputs """ """ Save the final MS """ os.system('cp -r '+combined_cont_ap+'.ms '+prefix+'_continuum.ms') os.system('tar cvzf '+prefix+'_continuum.ms.tgz '+prefix+'_continuum.ms') """ Make a fiducial continuum image (based on experimentation) """ mask_ra = '16h48m45.622s' mask_dec = '-14.16.36.258' fid_mask = 'ellipse[[%s, %s], [%.1farcsec, %.1farcsec], %.1fdeg]' % \ (mask_ra, mask_dec, mask_maj, mask_min, mask_pa) scales = [0, 5, 20, 60, 120, 240] tclean_wrapper(vis=combined_cont_ap+'.ms', imagename=prefix+'_continuum', mask=fid_mask, scales=scales, threshold='0.05mJy', robust=0., uvtaper=['0.055arcsec', '0.01arcsec', '9.8deg']) exportfits(prefix+'_continuum.image', prefix+'_continuum.fits')