Summary of Data Quality Observations of 13/2/96 ------------------------------------------------ Stations: 14, 22, 30, 33, 34, 37 Ant 2 3 4 5 6 1 459.2 1148.0 1408.2 1484.7 4500.0 2 688.8 949.0 1025.5 4040.8 3 260.2 336.7 3352.0 4 76.5 3091.8 5 3015.3 13cm receiver on CA04 did not survive a thermal cycle, and had to be flagged out. Array: 1.5C Fields: Calibrator 1934-638 Offset Calibrator 1934_a Blank Field 1934_b Frequencies: 1344 2368 4800 8640 MHz The offset calibrator field was offset in RA,DEC from 1934-638 by 0,420 arcsec at 1344 MHz 0,420 arcsec at 2368 MHz 0,120 arcsec at 4800 MHz 0,120 arcsec at 8640 MHz See the end of this document for an explanation of terms and the filenaming convention. ------------------------------------------------------------------------ Flagging statistics after ATLOD ------------------------------- File XX% YY% XY% YX% ---- --- --- --- --- 1934-638.1344 7.7% 7.7% 7.7% 7.7% 1934-638.2368 7.7% 8.3% 8.2% 7.8% 1934-638.4800 6.3% 6.3% 6.3% 6.3% 1934-638.8640 6.3% 6.3% 6.3% 6.3% 1934_a.1344 0.0% 0.0% 0.0% 0.0% 1934_a.2368 0.0% 0.0% 0.0% 0.0% 1934_a.4800 0.0% 0.0% 0.0% 0.0% 1934_a.8640 0.0% 0.0% 0.0% 0.0% 1934_b.1344 0.0% 0.0% 0.0% 0.0% 1934_b.2368 0.0% 0.0% 0.0% 0.0% 1934_b.4800 0.0% 0.0% 0.0% 0.0% 1934_b.8640 0.0% 0.0% 0.0% 0.0% ---------------------------------------------- Closure phase statistics for the point sources File Th.Phase Sigmas ---- -------- ------ 1934-638.1344 0.014 12.93 1934-638.2368 0.017 3.53 1934-638.4800 0.031 1.13 1934-638.8640 0.064 3.00 1934_a.1344 0.014 11.50 1934_a.2368 0.023 5.22 1934_a.4800 0.031 2.06 1934_a.8640 0.075 2.61 --------------------------------------- Post-reduction flagging statistics ---------------------------------- File XX% YY% XY% YX% ---- --- --- --- --- 1934-638.1344-cal 17.2% 17.2% 17.2% 17.2% 1934-638.2368-cal 11.1% 11.1% 11.1% 11.1% 1934-638.4800-cal 10.9% 10.9% 10.9% 10.9% 1934-638.8640-cal 9.4% 9.4% 9.4% 9.4% 1934_a.1344-cal 4.7% 4.7% 4.7% 4.7% 1934_a.2368-cal 0.3% 0.3% 0.3% 0.3% 1934_a.4800-cal 4.2% 4.2% 4.2% 4.2% 1934_a.8640-cal 0.7% 0.7% 0.7% 0.7% 1934_b.1344-cal 1.5% 1.5% 1.5% 1.5% 1934_b.2368-cal 1.3% 1.3% 1.3% 1.3% 1934_b.4800-cal 7.2% 7.2% 7.2% 7.2% 1934_b.8640-cal 2.2% 2.2% 2.2% 2.2% ======================================================================== File Th. RMS Sigmas D.R. Pk Val ---- ------- ------ ---- ------ 1934-638.1344-low.icln 6.00E-04 151.45 98 8.873 1934-638.1344-low.qmap 6.00E-04 33.79 9 0.188 1934-638.1344-low.umap 6.00E-04 52.98 6 0.188 1934-638.1344-low.vmap 6.00E-04 43.89 9 0.243 1934-638.2368-low.icln 7.86E-04 107.74 64 5.443 1934-638.2368-low.qmap 7.86E-04 24.01 7 0.130 1934-638.2368-low.umap 7.86E-04 46.55 7 0.253 1934-638.2368-low.vmap 7.86E-04 27.62 8 0.174 1934-638.4800-low.icln 6.96E-04 66.04 53 2.456 1934-638.4800-low.qmap 6.96E-04 20.75 6 0.087 1934-638.4800-low.umap 6.96E-04 18.87 4 0.058 1934-638.4800-low.vmap 6.96E-04 6.38 6 0.026 1934-638.8640-low.icln 1.05E-03 27.30 31 0.896 1934-638.8640-low.qmap 1.05E-03 8.42 5 0.042 1934-638.8640-low.umap 1.05E-03 14.02 4 0.060 1934-638.8640-low.vmap 1.05E-03 2.94 5 0.015 1934-638.1344-full.icln 2.71E-04 317.69 76 6.576 1934-638.1344-full.qmap 2.71E-04 57.37 8 0.118 1934-638.1344-full.umap 2.71E-04 76.40 8 0.158 1934-638.1344-full.vmap 2.71E-04 85.31 10 0.229 1934-638.2368-full.icln 2.81E-04 182.26 149 7.621 1934-638.2368-full.qmap 2.81E-04 50.63 7 0.103 1934-638.2368-full.umap 2.81E-04 85.76 6 0.156 1934-638.2368-full.vmap 2.81E-04 71.00 9 0.172 1934-638.4800-full.icln 2.51E-04 165.19 53 2.179 1934-638.4800-full.qmap 2.51E-04 47.49 6 0.075 1934-638.4800-full.umap 2.51E-04 38.50 7 0.065 1934-638.4800-full.vmap 2.51E-04 14.14 7 0.025 1934-638.8640-full.icln 2.54E-04 103.56 29 0.752 1934-638.8640-full.qmap 2.54E-04 23.98 4 0.025 1934-638.8640-full.umap 2.54E-04 25.62 6 0.037 1934-638.8640-full.vmap 2.54E-04 10.38 6 0.016 1934_a.1344-full.icln 2.61E-04 99.93 489 12.732 1934_a.1344-full.qmap 2.61E-04 52.95 9 0.124 1934_a.1344-full.umap 2.61E-04 68.76 7 0.123 1934_a.1344-full.vmap 2.61E-04 77.82 9 0.190 1934_a.2368-full.icln 2.70E-04 88.56 310 7.396 1934_a.2368-full.qmap 2.70E-04 45.53 6 0.074 1934_a.2368-full.umap 2.70E-04 65.69 7 0.117 1934_a.2368-full.vmap 2.70E-04 75.04 11 0.226 1934_a.4800-full.icln 2.39E-04 18.76 1159 5.184 1934_a.4800-full.qmap 2.39E-04 46.56 7 0.079 1934_a.4800-full.umap 2.39E-04 36.55 7 0.059 1934_a.4800-full.vmap 2.39E-04 13.95 7 0.023 1934_a.8640-full.icln 2.37E-04 16.06 551 2.093 1934_a.8640-full.qmap 2.37E-04 23.03 5 0.028 1934_a.8640-full.umap 2.37E-04 26.12 7 0.041 1934_a.8640-full.vmap 2.37E-04 16.35 9 0.034 1934_b.1344-full.imap 2.77E-04 6.82 3 0.006 1934_b.1344-full.qmap 2.77E-04 1.02 4 0.001 1934_b.1344-full.umap 2.77E-04 1.00 4 0.001 1934_b.1344-full.vmap 2.77E-04 1.00 5 0.001 1934_b.2368-full.imap 2.92E-04 2.29 4 0.002 1934_b.2368-full.qmap 2.92E-04 0.98 4 0.001 1934_b.2368-full.umap 2.92E-04 1.01 5 0.001 1934_b.2368-full.vmap 2.92E-04 1.09 4 0.001 1934_b.4800-full.imap 2.49E-04 1.09 5 0.001 1934_b.4800-full.qmap 2.49E-04 1.01 4 0.001 1934_b.4800-full.umap 2.49E-04 1.03 4 0.001 1934_b.4800-full.vmap 2.49E-04 0.95 5 0.001 1934_b.8640-full.imap 2.44E-04 0.99 4 0.001 1934_b.8640-full.qmap 2.44E-04 1.07 4 0.001 1934_b.8640-full.umap 2.44E-04 1.01 4 0.001 1934_b.8640-full.vmap 2.44E-04 0.87 4 0.001 ======================================================================== Explanation of Terms: --------------------- XX%,YY%,XY%,YY% Percentage of XX, XY, YX and YY correlations flagged (excluding on-line flagging and shadowing). Th.Phase The theoretical closure phase (in degrees) based on thermal noise arguments (for the 5-minute time averaging used). Th. RMS The theoretical RMS in an image based on thermal noise arguments. Sigmas The factor by which the relevant meausre exceeds either of the above two theoretical levels. Ideally this should be 1. D.R. Dynamic range of an image, defined as the ratio of the peak absolute value divided by the RMS. For the CLEANed Stokes-I images of the calibrators, the RMS is evaluated outside the inner quarter of the image. Otherwise the RMS is evaluated over the entire image. Pk Val Peak value in an image in Jy. Explanation of File names: -------------------------- File names are of the form FIELD.FREQ Raw visibility data, giving the field name and observing frequency. FIELD.FREQ-cal Calibrated/flagged visibility data. FIELD.FREQ-low.TYPE Low resolution image, imaging the entire primary beam. TYPE gives the Stokes parameter and whether the image is CLEANed ("cln") or a dirty image ("map"). FIELD.FREQ-full.TYPE Full resolution image, but imaging only a subportion of the primary beam. TYPE is as above. Observations by Sturat Ryder Robin Wark