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Publications

Ph.D. Thesis

Memos

Talks

My research interests include numerical techniques and algorithm development for image reconstruction and calibration of synthetic-aperture imaging systems, interactive data visualization, computational physics, parallel and high-performance computing.

Curriculum Vita (pdf)

Publications

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• A multi-scale multi-frequency deconvolution algorithm for synthesis imaging in radio-interferometry, U.Rau, T.J.Cornwell, Astronomy and Astrophysics, Volume 532, August 2011.


• EVLA Observations of Galactic Supernova Remnants: Wide-field Continuum and Spectral-index Imaging, S. Bhatnagar, U. Rau, D. A. Green, M. P. Rupen .The Astrophysical Journal Letters, Volume 739, Issue 1, L20, September 2011


• Deep Radio Continuum Imaging of the Dwarf Irregular Galaxy IC 10: Tracing Star Formation and Magnetic Fields,V.Heesen, U.Rau, M.P.Rupen, E.Brinks,D.Hunter, The Astrophysical Journal Letters, Volume 739, Issue 1, L23, September 2011.


• SparseRI: A Compressed Sensing Framework for Aperture Synthesis Imaging in Radio Astronomy, Wenger, S.; Magnor, M.; Pihlström, Y.; Bhatnagar, S.; Rau, U., PASP, Volume 122, issue 897, pp.1367-1374, November, 2010


• Advances in Calibration and Imaging Techniques in Radio Interferometry, U.Rau, S.Bhatnagar, M.A.Voronkov,T.J.Cornwell, Proceedings of the IEEE, Vol.97, No.8, p-1472, August 2009


• Monte-Carlo Image analysis in Radio Interferometry, Urvashi R.V., T.J.Cornwell, Astronomical Data Analysis Software and Systems XIV ASP Conference Series,Vol. 347,p-168, 2004


• Solving for Polarization Leakage in Radio Interferometers Using Unpolarized Sources, Bhatnagar S., Urvashi R.V., Nityananda R.,Astronomical Data Analysis Software and Systems XII ASP Conference Series, Vol. 295, p-469, 2003

Ph.D. Thesis

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Parameterized Deconvolution for Wide-Band Radio Synthesis Imaging, Department of Physics, New Mexico Institude of Mining and Technology, Socorro, NM, USA (May 2010).

M.S. Thesis
A performance model and load balancer for a Parallel Monte-Carlo Cellular microphysiology simulator, Department of Computer Science and Engineering, University of California, San Diego, CA, USA (June 2004). [MCell-K]

Memos/Technical-Reports

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• Automatic RFI identification and flagging in CASA , U.Rau, ARDG/CASA Note, 26 June 2011


• Imaging Algorithms in CASA , U.Rau, ARDG/CASA Note, 19 November 2010


• Casapy Flag tool and casa::Flagger , U.Rau, CASA Programmers Note, 23 August 2007


• Design of casa::TablePlot for Casapy , U.Rau, CASA Programmers Note, 18 August 2007


• Multi Frequency Synthesis Imaging for the EVLA : An initial investigation , Urvashi R.V., T.J.Cornwell, S.T.Myers, EVLA Memo 101, April 2006


• Monte Carlo Methods for Bayesian Image Reconstruction and Analysis in Radio Astronomy , , Urvashi R.V., T.J.Cornwell, EVLA Memo 102. February 2006


• Automatic RFI identification and flagging, Urvashi R.V., Rao, A. Pramesh, NCRA Technical Report No. R00202, October 1 2003

Talks/Presentations

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2012

• "Correcting for wide-band primary-beam effects during imaging and deconvolution", [OpenOffice version], Wednesday Lunch talk at the NRAO/SOC, 28 March 2012, Socorro, NM, USA.
• Flagging Capabilities in CASA 3.4, Presentation for EVLA CASA commissioning meeting, 6 Mar 2012, Socorro, NM, USA.
• "Wide-band (wide-field) imaging + Flagging/RFI", [OpenOffice version], EVLA Data Reduction Workshop, 24 Feb 2012, Socorro, NM, USA.


2011

• "Wide-field Wide-band Imaging with the EVLA - II", EVLA Data Reduction Workshop, 15 September 2011, Socorro, NM, USA.
• "Synthesis Imaging in Radio Astronomy - Reconstructing spatial and spectral structure of an astronomical source", BASP (Biomedical and Astronomical Signal Processing) Frontiers Workshop, 06 September 2011, Villars, Switzerland.
• "Multi-frequency synthesis and wide-field imaging with the EVLA", URSI General Assembly, 17 August 2011, Istanbul, Turkey,
• "Recent Imaging Results with EVLA data, and lessons learnt so far", Sixth SKA Calibration and Imaging Workshop, 26 July 2011, Manchester, UK (via Skype).
• "Wideband imaging with the EVLA", NRAO Algorithm R&D Group Lecture-series, 21 July 2011, Socorro, USA.


2010

• "Pilot Project for an EVLA wide-band Galactic-plane survey : first results" , 26th Annual New Mexico Symposium, 5 November 2010, Socorro, NM, USA.
• "A few imaging results using wide-band EVLA data" , Wednesday Lunch talk at the NRAO/SOC, 3 November 2010, Socorro, NM, USA.
• "Wide-field Wide-band image reconstruction with the EVLA", Univ. of New Mexico Physics Dept. Seminar, 30 September 2010, Albuquerque, NM, USA.
• "Feasibility of wide-band imaging (using MS-MFS)", Talk at the Fifth SKA Calibration and Imaging workshop, 23 August 2010, Dwingeloo, The Netherlands.
• "Wide-Field Wide-Band Imaging in Radio Interferometry", NCRA Colloquium, 12 July 2010, Pune, India
• "Parameterized Deconvolution for Wide-Band Radio Synthesis Imaging", PhD Thesis Defense, 17 May 2010, Socorro, NM, USA
• "Wide-Field Wide-Band Imaging With the EVLA", 215th AAS meeting, 6 January 2010, Washington, DC, USA


2009

• "Feasibility of Multi-Frequency-Synthesis - for non-standard cases", Presentation to the NRAO Algorithm Research and Development Group, 16 July 2009, Socorro, USA
• "Wide-Field Wide-Band Imaging in Radio Interferometry", Talk at the ATNF Student Symposium, 16 June 2009, Sydney, AU (via audio link from Socorro)
• "Remote Sensing, Image Making and Radio Telescopes ", Colloquium at the New Mexico Tech Physics Department, 09 Apr 2009, Socorro, USA
• "Wide-Field Wide-Band Imaging with the EVLA - initial results", Talk at the Fourth SKA Calibration and Imaging Workshop, 31 March 2009, Socorro, USA
• "Multi Frequency Synthesis Imaging with Wideband EVLA data",Lunch Talk at the EVLA Advisory Committee Meeting, 19-20 March 2009, Socorro, USA


2008

• "Multi-Frequency Synthesis Imaging with Multi-Scale Deconvolution (EVLA, e-MERLIN)", Talk at the Workshop on Imaging and Calibration Algorithms for EVLA, eMERLIN and ALMA, 02 December 2008, Oxford, UK (via video link from Socorro)
• "Multi-Frequency Synthesis Imaging with Wide-Band (E)VLA data", Talk at the 24th Annual New Mexico Symposium, 24 October 2008, Socorro, USA
• "Multi-Frequency Synthesis Imaging with Multi-Scale Deconvolution", Invited Talk at the XXIX URSI General Assembly, 15 August 2008, Chicago, USA
• "Wide-Band Imaging - Algorithms and Errors", Talk at the Third SKA Calibration and Imaging Workshop, 09 April 2008, Perth, AU
• "Multi-Frequency Synthesis Imaging with the EVLA - initial results from a test observation of Cygnus-A at L-Band", Wednesday Lunch Talk at the NRAO-AOC, 05 March 2008, Socorro, USA
• "Multi-Frequency Synthesis Imaging with the EVLA", Tuna Lunch Talk at NRAO-CV, 29 January 2009, Charlottesville, USA


2006-2007

• "Multi-Frequency Synthesis Imaging with Multi-Scale deconvolution", Talk at the Workshop on Radio Surveys Science and Techniques, 18 April 2007, Los Alamos, USA
• "Multi-Frequency Synthesis Imaging with Multi-Scale deconvolution", Talk at the National Centre for Radio Astrophysics (TIFR), 17 November 2006, Pune, India
• "Multi-Frequency Synthesis Imaging with Multi-Scale deconvolution", Talk at the Second SKA Calibration and Imaging Workshop, 05 December 2006, Cape Town, South Africa
• "Multi-Frequency Synthesis Imaging with Multi-Scale deconvolution", Galaxy Lunch Talk at the Aistralia Telescope National Facility(ATNF), 06 June 2006, Marsfield/Sydney, AU
• "Wide Bandwidth Imaging: Challenges and prospects for the EVLA and beyond" ,Talk at the URSI National Radio Science Meeting, 06 January 2006, Boulder, USA


Introductory Talks about Aperture Synthesis

BITS Embryo 1 : Remote Sensing at its extreme
BITS Embryo 2 : Remote Sensing and Image Making
Introduction to Aperture Synthesis : [OpenOffice version ]