Summary of Data Quality Observations of 3-JAN-1996 ------------------------------------------------ Robin Wark * Antenna 4 was not available for these observations * Otherwise the results looked simular to the results of 1/11/95 and 3/12/95 Array: 0.75C Fields: Calibrator 0823-500 Offset Calibrator 0823_a Blank Field 0823_b Frequencies: 1344 2368 4800 8640 MHz The offset calibrator field was offset in RA,DEC from 0823-500 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% ---- --- --- --- --- 0823-500.1344 0.0% 0.1% 0.1% 0.0% 0823-500.2368 0.0% 0.0% 0.0% 0.0% 0823-500.4800 0.4% 0.4% 0.4% 0.4% 0823-500.8640 0.1% 0.1% 0.1% 0.1% 0823_a.1344 0.0% 0.0% 0.0% 0.0% 0823_a.2368 0.1% 0.1% 0.1% 0.1% 0823_a.4800 0.0% 0.0% 0.0% 0.0% 0823_a.8640 0.0% 0.0% 0.0% 0.0% 0823_b.1344 0.0% 0.1% 0.1% 0.0% 0823_b.2368 0.1% 0.1% 0.1% 0.1% 0823_b.4800 0.2% 0.1% 0.1% 0.1% 0823_b.8640 0.2% 0.1% 0.1% 0.1% ---------------------------------------------- Closure phase statistics for the point sources File Th.Phase Sigmas ---- -------- ------ 0823-500.1344 0.032 27.03 0823-500.2368 0.034 9.21 0823-500.4800 0.065 1.49 0823-500.8640 0.125 2.02 0823_a.1344 0.032 21.12 0823_a.2368 0.043 4.00 0823_a.4800 0.058 1.34 0823_a.8640 0.149 1.80 --------------------------------------- Post-reduction flagging statistics ---------------------------------- File XX% YY% XY% YX% ---- --- --- --- --- 0823-500.1344-cal 16.8% 16.8% 16.8% 16.8% 0823-500.2368-cal 7.8% 7.8% 7.8% 7.8% 0823-500.4800-cal 3.3% 3.3% 3.3% 3.3% 0823-500.8640-cal 4.4% 4.4% 4.4% 4.4% 0823_a.1344-cal 5.0% 5.0% 5.0% 5.0% 0823_a.2368-cal 0.6% 0.6% 0.6% 0.6% 0823_a.4800-cal 3.7% 3.7% 3.7% 3.7% 0823_a.8640-cal 3.4% 3.4% 3.4% 3.4% 0823_b.1344-cal 1.5% 1.5% 1.5% 1.5% 0823_b.2368-cal 3.6% 3.6% 3.6% 3.6% 0823_b.4800-cal 2.2% 2.2% 2.2% 2.2% 0823_b.8640-cal 3.6% 3.6% 3.6% 3.6% ======================================================================== File Th. RMS Sigmas D.R. Pk Val ---- ------- ------ ---- ------ 0823-500.1344-low.icln 2.88E-04 9.36 2016 5.438 0823-500.1344-low.qmap 2.88E-04 2.24 4 0.003 0823-500.1344-low.umap 2.88E-04 1.74 5 0.002 0823-500.1344-low.vmap 2.88E-04 1.54 5 0.002 0823-500.2368-low.icln 3.81E-04 3.20 4533 5.541 0823-500.2368-low.qmap 3.81E-04 3.10 17 0.020 0823-500.2368-low.umap 3.81E-04 2.42 15 0.014 0823-500.2368-low.vmap 3.81E-04 1.50 5 0.003 0823-500.4800-low.icln 4.02E-04 1.64 4683 3.082 0823-500.4800-low.qmap 4.02E-04 6.83 17 0.047 0823-500.4800-low.umap 4.02E-04 1.15 4 0.002 0823-500.4800-low.vmap 4.02E-04 1.10 4 0.002 0823-500.8640-low.icln 4.15E-04 0.86 4020 1.436 0823-500.8640-low.qmap 4.15E-04 3.24 16 0.022 0823-500.8640-low.umap 4.15E-04 0.90 8 0.003 0823-500.8640-low.vmap 4.15E-04 0.91 4 0.001 0823-500.1344-full.icln 1.06E-04 16.53 3089 5.437 0823-500.1344-full.qmap 1.06E-04 2.50 5 0.001 0823-500.1344-full.umap 1.06E-04 2.04 4 0.001 0823-500.1344-full.vmap 1.06E-04 1.88 5 0.001 0823-500.2368-full.icln 1.20E-04 5.20 8901 5.547 0823-500.2368-full.qmap 1.20E-04 5.82 24 0.017 0823-500.2368-full.umap 1.20E-04 4.95 24 0.014 0823-500.2368-full.vmap 1.20E-04 1.91 6 0.001 0823-500.4800-full.icln 1.04E-04 2.57 11539 3.084 0823-500.4800-full.qmap 1.04E-04 18.00 26 0.050 0823-500.4800-full.umap 1.04E-04 1.10 5 0.001 0823-500.4800-full.vmap 1.04E-04 1.21 5 0.001 0823-500.8640-full.icln 1.10E-04 2.64 4933 1.436 0823-500.8640-full.qmap 1.10E-04 9.17 22 0.022 0823-500.8640-full.umap 1.10E-04 1.64 19 0.003 0823-500.8640-full.vmap 1.10E-04 1.00 4 0.000 0823_a.1344-full.icln 1.01E-04 12.83 3694 4.805 0823_a.1344-full.qmap 1.01E-04 3.69 13 0.005 0823_a.1344-full.umap 1.01E-04 3.33 6 0.002 0823_a.1344-full.vmap 1.01E-04 2.35 6 0.001 0823_a.2368-full.icln 1.14E-04 6.07 5880 4.078 0823_a.2368-full.qmap 1.14E-04 40.37 16 0.075 0823_a.2368-full.umap 1.14E-04 30.31 6 0.022 0823_a.2368-full.vmap 1.14E-04 23.44 7 0.019 0823_a.4800-full.icln 1.02E-04 2.69 10231 2.796 0823_a.4800-full.qmap 1.02E-04 18.58 26 0.049 0823_a.4800-full.umap 1.02E-04 1.40 5 0.001 0823_a.4800-full.vmap 1.02E-04 1.21 5 0.001 0823_a.8640-full.icln 1.07E-04 1.98 5120 1.082 0823_a.8640-full.qmap 1.07E-04 14.00 21 0.032 0823_a.8640-full.umap 1.07E-04 5.52 6 0.004 0823_a.8640-full.vmap 1.07E-04 7.20 7 0.005 0823_b.1344-full.imap 9.66E-05 9.91 5 0.005 0823_b.1344-full.qmap 9.66E-05 1.36 5 0.001 0823_b.1344-full.umap 9.66E-05 1.40 4 0.001 0823_b.1344-full.vmap 9.66E-05 0.97 5 0.000 0823_b.2368-full.imap 1.14E-04 2.55 6 0.002 0823_b.2368-full.qmap 1.14E-04 1.09 5 0.001 0823_b.2368-full.umap 1.14E-04 1.11 4 0.001 0823_b.2368-full.vmap 1.14E-04 0.97 4 0.000 0823_b.4800-full.imap 9.81E-05 1.12 5 0.001 0823_b.4800-full.qmap 9.81E-05 1.05 4 0.000 0823_b.4800-full.umap 9.81E-05 1.00 5 0.000 0823_b.4800-full.vmap 9.81E-05 1.03 4 0.000 0823_b.8640-full.imap 1.05E-04 1.02 5 0.001 0823_b.8640-full.qmap 1.05E-04 0.98 4 0.000 0823_b.8640-full.umap 1.05E-04 1.04 4 0.000 0823_b.8640-full.vmap 1.05E-04 0.97 4 0.000 ======================================================================== 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.