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4th Solar KSP Meeting Potsdam 2010 November 08

4th Solar KSP Meeting Potsdam 2010 November 08. Solar Imaging with the Standard Imaging Pipeling Frank Breitling Astrophysikalisches Institut Potsdam. Overview. Introduction to the pipeline Status of solar imaging New results Conclusions. The LOFAR Standard Imaging Pipeline.

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4th Solar KSP Meeting Potsdam 2010 November 08

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  1. 4th Solar KSP MeetingPotsdam2010 November 08 Solar Imaging with the Standard Imaging Pipeling Frank Breitling Astrophysikalisches Institut Potsdam

  2. Overview • Introduction to the pipeline • Status of solar imaging • New results • Conclusions Solar Imaging with the Standard Imaging Pipeline, Frank Breitling

  3. The LOFAR Standard Imaging Pipeline Components • OLAP: Online Application Processing (Blue Gene/P correlator) • DP3/DPPP: Default Pre-Processing Pipeline (for flagging and averaging) • BBS: BlackBoard Selfcal (calibration) • CImager: Imagers Control • via parset files Solar Imaging with the Standard Imaging Pipeline, Frank Breitling

  4. Details • Data format • Measurements Sets (MS) from CASA • Batch processing • DPPP • BBS • Imagers (LOFAR wiki: http://www.lofar.org/wiki/doku.php?id=software:standard_imaging_pipeline) (Cookbook: http://www.mpa-garching.mpg.de/~fdg/LOFAR_cookbook/LOFAR_Cookbook_v2.3.pdf) • Interactive Processing • CASA (Common Astronomy Software Applications (http://casa.nrao.edu/ CASA Cookbook) Solar Imaging with the Standard Imaging Pipeline, Frank Breitling

  5. First solar observations Date: 2010-06-09 10:17:00, 11:41:00, 13:40:00, 15:40:00 Duration: 4 x 10 Min Frequency range: ~120-180 MHz LOFAR stations: 20 core (CS) + 3 remote (RS) stations, i.e.: RS106HBA, RS306HBA, RS503HBA, (CS001-7, CS021, CS030, CS103)xHBA0+1 Total data volume: 1.5 TB Solar Imaging with the Standard Imaging Pipeline, Frank Breitling

  6. Solar Imaging with the Standard Imaging Pipeline, Frank Breitling

  7. LOFAR: 135 MHz Nancy RH: 150.9 MHz Solar Imaging with the Standard Imaging Pipeline, Frank Breitling

  8. Details about data - SB105(msinfo) # of visibilities: 194025 Phase center: +05:05:09.0, +24:09:52.0 Frequency range (MHz): 135.449 -- 135.645 Wavelength range (m): 2.213 -- 2.210 Observation time span: 2010-06-09T10:17:00 -- 10:27:00 Duration (min): 10 time bin / integration: 1.00663 # of channels: 256 channel width (KHz): 0.8 # of polarizations: 4 # of antennas: 25 Solar Imaging with the Standard Imaging Pipeline, Frank Breitling

  9. Problems during data analysis • Imperfect calibration • Clock offsets => Clock offsets (from Olaf) Station microsec CS001HBA0 0 CS001HBA1 0.01 CS002HBA0 1.913 CS002HBA1 1.903 CS003HBA0 1.913 CS003HBA1 1.9 CS004HBA0 1.893 CS004HBA1 1.9 CS005HBA0 1.887 CS005HBA1 1.9 CS007HBA0 1.887 CS007HBA1 1.9 CS006HBA0 1.887 CS006HBA1 1.893 CS021HBA0 -0.014 CS021HBA1 -0.01 CS030HBA0 -0.007 CS030HBA1 -0.007 CS032HBA0 -0.003 CS032HBA1 0.01 CS103HBA0 -0.025 CS103HBA1 -0.025 RS106HBA -0.12 RS306HBA 0 RS503HBA 0.007 Solar Imaging with the Standard Imaging Pipeline, Frank Breitling

  10. BBS Sky Model # (Name, Type, Ra, Dec, I, Q, U, V, ReferenceFrequency='60e6', SpectralIndexDegree='0', SpectralIndex:0='0.0', MajorAxis, MinorAxis, Orientation) = format # The abovelinedefinesthefieldorderandisrequired. Sun, GAUSSIAN, 14:18:17.00, -13.49.12.0, 60000.00, 0.0, 0.0, 0.0,81.5e6, 0, 0., 4000.0, 4000.0, 0.0 TauA.neb, GAUSSIAN, 05:34:32.00, +22.00.52.00, 1888.55, 0.0, 0.0, 0.0,81.5e6, 0, -0.299, 420.0, 290.0, 0.0 3C123, POINT, 04:37:04.72, +29.40.15.6, 454.97 3C133, POINT, 05:02:58.58, +25.16.22.7, 44.67 • Now reduced to only 4 sources • Sun is strongly dominating • 3C sources from “The VLA Low-Frequency Sky Survey” catalog (http://www.cv.nrao.edu/4mass/VLSSlist.shtml) • Sun coordinates from (http://www.jgiesen.de/astro/astroJS/sunriseJS/index.htm) Solar Imaging with the Standard Imaging Pipeline, Frank Breitling

  11. Model Images with BBS blmax: 60m 125m 250m 500m 1000m all Solar Imaging with the Standard Imaging Pipeline, Frank Breitling

  12. UV Coverage 60m 125m 250m 500m 1000m all Solar Imaging with the Standard Imaging Pipeline, Frank Breitling

  13. Core stations without clock offsets Use only core stations CS002-CS007 (Baselines <400m) Solar Imaging with the Standard Imaging Pipeline, Frank Breitling

  14. SB184: 150.885-151.068 MHzNancy Radio Heliograph frequency 150.9 MHz • Dirty image • Model image Solar Imaging with the Standard Imaging Pipeline, Frank Breitling

  15. SB184: 150.885-151.068 MHz2010-06-09T15:40:00 - 15:50:00 • Dirty image • Model image Solar Imaging with the Standard Imaging Pipeline, Frank Breitling

  16. Data volume problem • Data is difficult to • find on offline cluster • copy and archive • Data analysis • consumes a lot of CPU • takes very long We have to emphasize more that we want small data samples!!! Solar Imaging with the Standard Imaging Pipeline, Frank Breitling

  17. Conclusion / Outlook • First solar images with the Standard Imaging Pipeline • Quality needs improvement • Analysis needs to be extended to more subbands • 7 new solar observation were taken on 2010-10-29,30 • Should only request 10 subbands for next observations • Olaf will spend the next days at the AIP for data analysis • Many problems have been and will be discussed at the LOFAR Forum Thanks for your attention Solar Imaging with the Standard Imaging Pipeline, Frank Breitling

  18. References • User Software Group: http://usg.lofar.org/ • LOFAR User Forum: http://usg.lofar.org/forum/index.php • LOFAR Interface ControlDocuments (ICDs) http://usg.lofar.org/wiki/doku.php?id=documents:lofar_data_products • Documentation for the Standard Imaging Pipeline http://www.lofar.org/wiki/doku.php?id=software:standard_imaging_pipeline • The LOFAR Imaging Cookbook http://www.mpa-garching.mpg.de/~fdg/LOFAR_cookbook/LOFAR_Cookbook_v2.3.pdf • Frank Breitling <fbreitling at aip.de> http://www.aip.de/People/fbreitling/ Solar Imaging with the Standard Imaging Pipeline, Frank Breitling

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