#!/usr/bin/env """ make line datacubes and integrated maps and compare applying continuum selfcal NOTE: this is intended to be an interactive, iterative process so this is more a log that should be run by cutting and pasting into casa rather than as an executable script search "CHANGEME" for variables to be changed 10/9/15 MCA """ # ================================== Setup ===================================== # LupusIII_52 16:08:31.10 -38:55:59.9 field = 4 # CHANGEME fitspw = '2,3,4' # line-free channels for fitting continuum linespw = '0,1,3' # line spectral windows (C18O, 13CO, CN) robust = 0.5 # CHANGEME imsize = [640,640] cell = '0.03arcsec' imagermode = 'csclean' outframe = 'lsrk' veltype = 'radio' width = '1.0km/s' start = '-3km/s' nchan = 16 xc = 320 # CHANGEME yc = 317 # CHANGEME in_a = 80 out_a = 120 aper = 0.5 boxwidth = 300. box = rg.box([xc-boxwidth,yc-boxwidth],[xc+boxwidth,yc+boxwidth]) # ================ Create continuum subtracted line datasets =================== uvcontsub(vis = 'f'+str(field)+'.vis', # full vis file for this field spw = linespw, # line spw (for cont subtraction) fitspw = fitspw, # cont spw combine = 'spw', solint = 'int', fitorder = 1, want_cont = False) # should not be changed. # ============================== 13CO line ===================================== # first try on 13CO line as thats going to be the brightest # os.system('rm -rf f'+str(field)+'_13co32*') clean(vis = 'f'+str(field)+'.vis.contsub', imagename = 'f'+str(field)+'_13co32', mode = 'velocity', start = start, width = width, nchan = nchan, outframe = outframe, veltype = veltype, restfreq = '330.58797GHz', niter = 100, threshold = 0, interactive = False, imsize = imsize, cell = cell, weighting ='briggs', robust = robust, imagermode = imagermode) # can't see gas or continuum emission # cleaned in automated mode without mask # export cube to fits file fbase = 'f'+str(field)+'_13co32' os.system('rm -rf '+fbase+'.cube.fits') exportfits(imagename=fbase+'.image',fitsimage=fbase+'.cube.fits') # redo moment0 maps (now excluding noisy first channel!!) # os.system('rm -rf f'+str(field)+'_13co32.mom0*') immoments(imagename = 'f'+str(field)+'_13co32.image', # CHANGEME (based on above analysis!!) outfile = 'f'+str(field)+'_13co32.mom0', moments = [0], includepix = [-10.0,100.0], chans = ('range=[2km/s,6km/s]')) # CHANGEME (based on above analysis!!) # export to fits file fbase = 'f'+str(field)+'_13co32.mom0' os.system('rm -rf '+fbase+'.fits') exportfits(imagename=fbase,fitsimage=fbase+'.fits') # measure flux im_max = imstat(imagename = 'f'+str(field)+'_13co32.mom0')['max'][0] im_rms = imstat(imagename = 'f'+str(field)+'_13co32.mom0', region='annulus[['+str(xc)+'pix,'+str(yc)+'pix],['+str(in_a)+'pix,'+str(out_a)+'pix]]')['rms'][0] im_flux = imstat(imagename = 'f'+str(field)+'_13co32.mom0', region='circle[['+str(xc)+'pix,'+str(yc)+'pix],'+str(aper)+'arcsec]')['flux'][0] print 'Flux = {0:.2f} mJy, rms = {1:.2f} mJy, S/N = {2:.1f}'.format(1000*im_flux, 1000*im_rms, im_flux/im_rms) # Flux = -69.86 mJy, rms = 41.59 mJy, S/N = -1.7 # view gas (continuum not detected) imview(raster=[{'file':'f'+str(field)+'_13co32.mom0'}]) # re-center image on source and use measure.py to get COG flux # os.system('rm -rf f'+str(field)+'_13co32.mom0_cropped*') ia.fromimage(outfile = 'f'+str(field)+'_13co32.mom0_cropped.image', infile = 'f'+str(field)+'_13co32.mom0.fits', region = box ) ia.close() exportfits(imagename = 'f'+str(field)+'_13co32.mom0_cropped.image', fitsimage = 'f'+str(field)+'_13co32.mom0_cropped.fits') ''' Measuring COG for G/f4_13co32.mom0_cropped.fits Assuming object center (300.0,300.0) Background: 1.02 mJy/beam km/s RMS in annulus 4.0-6.0 arcsec = 41.58 mJy/beam km/s i radius flux err snr (asec) (mJy) (mJy) 0 0.10 -2.55 11.29 -0.2 1 0.20 -16.63 27.58 -0.6 2 0.30 -57.23 40.65 -1.4 <-- ND 3 0.40 -82.36 52.97 -1.6 4 0.50 -69.86 70.52 -1.0 5 0.60 -59.03 79.92 -0.7 6 0.70 -47.35 86.90 -0.5 7 0.80 -7.03 89.06 -0.1 8 0.90 73.50 118.59 0.6 ''' # ======================== C18O line ========================================== # don't bother with selfcal as it doesn't help... # os.system('rm -rf f'+str(field)+'_c18o32*') clean(vis = 'f'+str(field)+'.vis.contsub', imagename = 'f'+str(field)+'_c18o32', mode = 'velocity', start = start, width = width, nchan = nchan, outframe = outframe, veltype = veltype, restfreq = '329.33055GHz', niter = 100, threshold = 0, interactive = False, imsize = imsize, cell = cell, weighting ='briggs', robust = robust, imagermode = imagermode) # can't see gas or continuum emission # cleaned in automated mode without mask # export cube to fits file fbase = 'f'+str(field)+'_c18o32' os.system('rm -rf '+fbase+'.cube.fits') exportfits(imagename=fbase+'.image',fitsimage=fbase+'.cube.fits') # redo moment0 maps (now excluding noisy first channel!!) # os.system('rm -rf f'+str(field)+'_c18o32.mom0*') immoments(imagename = 'f'+str(field)+'_c18o32.image', # CHANGEME (based on above analysis!!) outfile = 'f'+str(field)+'_c18o32.mom0', moments = [0], includepix = [-10.0,100.0], chans = ('range=[2km/s,6km/s]')) # export to fits file fbase = 'f'+str(field)+'_c18o32.mom0' os.system('rm -rf '+fbase+'.fits') exportfits(imagename=fbase,fitsimage=fbase+'.fits') # measure flux im_rms = imstat(imagename = 'f'+str(field)+'_c18o32.mom0', region='annulus[['+str(xc)+'pix,'+str(yc)+'pix],['+str(in_a)+'pix,'+str(out_a)+'pix]]')['rms'][0] im_flux = imstat(imagename = 'f'+str(field)+'_c18o32.mom0', region='circle[['+str(xc)+'pix,'+str(yc)+'pix],'+str(aper)+'arcsec]')['flux'][0] print 'Flux = {0:.2f} mJy, rms = {1:.2f} mJy, S/N = {2:.1f}'.format(1000*im_flux, 1000*im_rms, im_flux/im_rms) # Flux = -8.76 mJy, rms = 52.86 mJy, S/N = -0.2 # view gas (continuum not detected) imview(raster=[{'file':'f'+str(field)+'_c18o32.mom0'}]) # re-center image on source and use measure.py to get COG flux # os.system('rm -rf f'+str(field)+'_c18o32.mom0_cropped*') ia.fromimage(outfile = 'f'+str(field)+'_c18o32.mom0_cropped.image', infile = 'f'+str(field)+'_c18o32.mom0.fits', region = box ) ia.close() exportfits(imagename = 'f'+str(field)+'_c18o32.mom0_cropped.image', fitsimage = 'f'+str(field)+'_c18o32.mom0_cropped.fits') ''' Measuring COG for G/f4_c18o32.mom0_cropped.fits Assuming object center (300.0,300.0) Background: 1.97 mJy/beam km/s RMS in annulus 4.0-6.0 arcsec = 51.97 mJy/beam km/s i radius flux err snr (asec) (mJy) (mJy) 0 0.10 -6.94 13.96 -0.5 1 0.20 -10.56 34.71 -0.3 2 0.30 1.29 50.76 0.0 <-- ND 3 0.40 5.67 68.10 0.1 4 0.50 -8.76 88.02 -0.1 5 0.60 -14.61 89.13 -0.2 6 0.70 14.03 106.95 0.1 7 0.80 70.11 131.00 0.5 8 0.90 144.57 117.43 1.2 9 1.00 196.97 135.16 1.5 10 1.10 200.42 150.72 1.3 11 1.20 176.40 151.19 1.2 12 1.30 137.05 163.70 0.8 13 1.40 118.23 183.19 0.6 14 1.50 103.31 197.35 0.5 F = 200.42 mJy E = 150.72 mJy S = 1.33 D = 2.20 arcsec ''' # ======================== Image CN ================== # don't bother with selfcal as it doesn't help... # os.system('rm -rf f'+str(field)+'_cn32_b4sc*') clean(vis = 'f'+str(field)+'.vis.contsub', imagename = 'f'+str(field)+'_cn32_b4sc', mode = 'velocity', start = start, width = width, nchan = nchan, outframe = outframe, veltype = veltype, restfreq = '340.24777GHz', niter = 100, threshold = 0, interactive = False, imsize = imsize, cell = cell, weighting ='briggs', robust = robust, imagermode = imagermode) # can't see gas or continuum emission # cleaned in automated mode without mask # redo moment0 maps (now excluding noisy first channel!!) # os.system('rm -rf f'+str(field)+'_cn32.mom0*') immoments(imagename = 'f'+str(field)+'_cn32_b4sc.image', # CHANGEME (based on above analysis!!) outfile = 'f'+str(field)+'_cn32.mom0', moments = [0], includepix = [-10.0,100.0], chans = ('range=[1km/s,7km/s]')) # CHANGEME (based on above analysis!!) # export to fits file fbase = 'f'+str(field)+'_cn32.mom0' os.system('rm -rf '+fbase+'.fits') exportfits(imagename=fbase,fitsimage=fbase+'.fits') # measure flux im_rms = imstat(imagename = 'f'+str(field)+'_cn32.mom0', region='annulus[['+str(xc)+'pix,'+str(yc)+'pix],['+str(in_a)+'pix,'+str(out_a)+'pix]]')['rms'][0] im_flux = imstat(imagename = 'f'+str(field)+'_cn32.mom0', region='circle[['+str(xc)+'pix,'+str(yc)+'pix],'+str(aper)+'arcsec]')['flux'][0] print 'Flux = {0:.2f} mJy, rms = {1:.2f} mJy, S/N = {2:.1f}'.format(1000*im_flux, 1000*im_rms, im_flux/im_rms) # Flux = -1.05 mJy, rms = 38.68 mJy, S/N = -0.0 # view gas (continuum not detected) imview(raster=[{'file':'f'+str(field)+'_cn32.mom0'}]) # re-center image on source and use measure.py to get COG flux # os.system('rm -rf f'+str(field)+'_cn32.mom0_cropped*') ia.fromimage(outfile = 'f'+str(field)+'_cn32.mom0_cropped.image', infile = 'f'+str(field)+'_cn32.mom0.fits', region = box ) ia.close() exportfits(imagename = 'f'+str(field)+'_cn32.mom0_cropped.image', fitsimage = 'f'+str(field)+'_cn32.mom0_cropped.fits') # CAN'T SEE GAS SO JUST USING 1" APER # 5 0.500 877 -3.96 72.439 -0.1 122.10 37.706 3.2 0.999