Contact

Dr. Klaus Gerhard Puschmann

------------------------------------
Julius-Pfister-Ring 14d
63755 Alzenau

Bavaria

Germany

------------------------------------

Phone: +49 6023 7061001
Mobile: +49 1522 1517880

E-Mail: kgp@live.de

Dr. Klaus Gerhard Puschmann
Dr. Klaus Gerhard Puschmann

Scientific Highlights  2012-2013

 

This section reflects a chronological protocol of my scientific and instrumental work between 2012 and 2013. A list that has been grown over a period of more than two years and reflects a detailed and chronological overview of all my contributions, achievements and results with a clear focus on the further development of the GREGOR Fabry-Perot Interferometer (GFPI), it's Commisioning and Science Verification and on the instrumental development of the BLue Imaging Solar Spectrometer (BLISS),  I was responsible for as the Instrument Scientist.

.

This section is basically a backup and copy of part of my former AIP Webpage that has been deleted by the Institute for Astrophysics Potsdam (AIP), just two days after my violent expulsion against all earlier commitments on the last day of my former contract (28 February 2014). It also includes former news and links to my scientific writing and related scientific publications on topics like:

 

  • Astropysics & Solar Physics: Photosphere, Chromosphere, Magnetic Fields, Sunspots, Pores, Quiet Sun, Spicules, Flares, Filaments..
  • Observational Astronomy: Spectroscopy, Polarimetry at different Telescopes (VTT, GREGOR, SST)     and Instruments (GFPI, TESOS, POLIS, TIP, CRISP, Spectrograph
  • Spectral Line Inversion,  Image Processing, Image Reconstruction (Speckle, Speckle Deconvolution, MOMFBD, GFPI Data-Pipeline), Numerical Analysis, Mathematical Modeling
  • Instrumental Development: GREGOR Fabry-Perot Interferometer - GFPI & BLue Imaging Solar Spectrometer - BLISS
  • The 1.5m GREGOR Solar Telescope

 

All observational results presented here are the product of my fully working  GREGOR Fabry-Perot Interferometer (GFPI) data-pipeline iSPOR-DP, Imaging Spectropolarimetric Parallel Organized Reconstruction Data Pipeline, which I developed during my contracts at the Institut für Astrophysik Göttingen and the Instituto de Astrofísica de Canarias.

 

iSPOR-DP is based on a modified version (Puschmann & Sailer, 2006, A&A 454, 1011) of the Göttingen broadband reconstruction code (de Boer, 1993, PHD-Thesis) and a modified version of a narrow-band deconvolution code developed by Krieg et al., 1999, A&A 343, 983 and K. Janssen, 2003, PHD-Thesis, which further bases on the method of Keller & v.d. Luehe, 1992, A&A 261, 321. As an alternative option also the Multi-Frame Multi-Object Blind-Deconvolution code (MOMFBD; M. Löfdahl, 2002, SPIE 4792, 146; M. van Noort et al. 2005, Solar Physics 228 ,19) can be applied instead. Details to this data-pipeline can be found in Puschmann & Beck 2011, A&A 533, 22. C. Beck (NSO) supplied me with his codes for the polarimetric calibration and analysis of spectropolarimetric data. I adapted the data-pipeline during my working contract at the Leibnitz-Institut für Astrophysik Potsdam (AIP) to the changing requirements @ GREGOR.

 

The resumption of my work after my violent expulsion from the AIP was possible after the private purchase of the required computing hardware by the end of 2014. iSPOR-S, the Imaging Spectropolarimetric Parallel Organized Reconstruction Server is perfectly suited to perform all required computational tasks for data reduction, image reconstruction, spectral deconvolution and data analysis within a reasonable computational time.

 

 

 

Imaging Spectropolarimteric Parallel Organized Reconstruction Server

 

Mainboard: Asus X99-A II

CPU: Intel I7-6950X (10core)

RAM: Crucial Ballistix Sport LT 128GB

Graphics: Gigabyte GeForce GTX 980 TI

SSD: Samsung 840 EVO 1TB

Raid: 3x WD RED 6TB (18TB)

Power Supply: Corsair

Monitor: Asus MX299

 

Operating System: MacOS Sierra 10.12.2

2011: Opto-mechanical add-ons (Filters-slider, motorized mirrors) and new modules for the GREGOR Fabry-Perot Interferometer (GFPI) instrument control software

The GFPI instrument control software has been iteratively developed between 2004 and 2007 in collaboration between Dr. T. Seelemann (La Vision, Goettngen, Germany) and myself under my directive.

 

The new modules for the GREGOR Fabry-Perot Interferometer Instrument control (Hardware, Software) allow now the automatic acquisition/performane of:

 

                                     1.) observation

                                     2.) flatfield

                                     3.) defokused flatfield

                                     4.) target

                                     5.) pinhole

                                     6.) spectral calibration measurements with the white light channel

                                     7.) dark current

                                     8.) etalon alignment and line finding

                                     9.) storage of observational parameters and settings

                                 

In addition a new DCP-Relay Server module for communication with internal and external devices has been integrated. All individual new modules are the result of the collaboration between Dr. T. Seelemann (LaVision, Goettingen, Germany) and myself under my directive.

Related presentation in the frame of the GREGOR-meeting held in Freiburg, Germany by the end of 2011. Please download the presentation below.

May 2012: Finished optical design for the new Blue Imaging Channel (BIC, 380-530 nm) of the GREGOR Fabry-Perot Interferometer.

Image @copyright Klaus Gerhard Puschmann - Click to enlarge the image

The GREGOR Fabry-Perot Interferometer with its new Blue Imaging Channel. Optical Elements (e.g. Lenses (TL), Beamsplitter (BS), etc.) and Cameras (CCD, 2 x pco4000) of the BIC marked with an extra "a" in the corresponding labels. The Graphic was produced with Microsoft Powerpoint. The presented design is based on calculations performed in geometrical optics.

 

 

June 2012: Finished Design for the integration of the BLue Imaging Solar Spectrometer (BLISS) into the GREGOR Fabry-Perot Interferometer (GFPI)

Image @copyright Klaus Gerhard Puschmann - Click to enlarge the image

Up-to-scale drawing - integration of BLISS into GFPI. Elements of BLISS labeled with ‘a’. Narrow-band channel (NBC) of GFPI and BLISS denoted by red and blue beam, respectively. Salmon (GFPI) and turquoise (BLISS) beam distinguish broad-band channels (BBC) of both instruments. Laser/Photomultiplier channels of both instruments highlighted by yellow beam. Light from telescope enters at science focus F4. Black arrows denote the light direction inside both instruments. The graphic was produced with Micrsoft Powerpoint. The presented design is based on calculations performed in geometrical optics.

Optical Engineering, Volume 52, id. 081606 @copyright - Click to enlarge the image

ZEMAX multi-configuration file in shaded modeling for the respective central wavelength and maximal field dimension of GFPI and BLISS, respectively. The design confirms the calculations in geometrical optics. Optical elements of BLISS are labeled with an extra ‘a’. The Graphic is based on a geometrical optical design developed by myself and was produced in the frame of a Zemax ray-tracing in collaboration between Dipl. Ing. M. Woche & K.G. Puschmann

 

 

June 2012: Successful science verification of the GFPI. Confirmation of dispersion, spatial sampling and blue-shift estimates of stray-light, counts and frame rates

Optical Engineering, Volume 52, id. 081606 @copyright - Click to enlarge the image

Spatial resolution measured at the different focal planes of the GREGOR F2-F4.

Optical Engineering, Volume 52, id. 081606 @copyright - Click to enlarge the image

Confirmation of dispersion and spectral resolution of the instrument. Yellow - measured average profile, red - Atlas Profile, blue - Airy function.

 

 

September 2012: First 2D spectra ever observed @ the 1.5m GREGOR solar telescope: The GREGOR Fabry-Perot Interferometer supported for the first time by Adaptive Optics

Observation: 31 July 2012

  • 22-min time-series of AR NOAA 11530 @ S24 W18 (θ= 30°)
  • Fe I 617.3 nm line, 86 steps, step width: Δλ = 1.17 pm, exposure time:  t=20 ms, scan duration: Δt=64 s

Data reduction:

  • Speckle broad band reconstruction
  • Speckle narrow band deconvolution
  • Blueshift correction
  • Compensation for image rotation
  • Subsonic filtering
Optical Engineering, Volume 52, id. 081606 @copyright - Click to enlarge the image

Still image of a 22 minute time series of spectroscopic observations of the active region NOAA 11530. Upper panels: speckle-reconstructed broad band image (620nm, left), speckle-deconvolved continuum (middle) und line-core (right) narrow band image. Lower panels: line-of -sight velocity (left), full-width at half-maximum (middle), equivalent width (right). The data have been reduced with iSPOR-DP, the Imaging Spectropolarimetric Parallel Organized Reconstruction Data Pipeline.

Optical Engineering, Volume 52, id. 081606 @copyright

Movie of the 22 minute time-series described above. The data have been reduced with iSPOR-DP, the Imaging Spectropolarimetric Parallel Organized Reconstruction Data Pipeline.

 

 

September 2012: 1 new publication

Puschmann, K.G., Balthasar, H., Beck, C., et al.: “GREGOR Fabry-Perot Interferometer – status report and prospects”, Proc. SPIE 8446, 79

 

October 2012: 1 new publication

Beck, C., Rezaei, R., Puschmann, K. G.: “The energy of waves in the photosphere and lower chromosphere. II. Intensity statistics”, A&A 544, 46

 

November 2012: 3 new publications

  • Puschmann, K.G., Denker, C., Kneer, F., et al.: “The GREGOR Fabry-Perot Interferometer”, AN, 333, 880
  • Schmidt, W., von der Lühe, O., Volkmer, R. ..., Puschmann, K. G., et al.: “The GREGOR solar telescope on Tenerife”, AN 333, 796
  • Denker, C., von der Lühe, O., Feller, A, …, Puschmann, K. G., et al.: “A retrospective of the GREGOR solar telescope in scientific literature”, AN 333, 812

November 2012: 2 scientific talks

Kiepenheuer Institut für Sonnenphysik (KIS), Freiburg: "The Gregor Fabry-Perot Interferometer - status, prospects and scientific aims".

puschmann_kis_2012_short_final.pdf
PDF-Dokument [18.0 MB]

Instituto de Astrofisica de Canarias (IAC), Tenerife: "The Gregor Fabry-Perot Interferometer - status, prospects and scientific aims"

The Graphic on the slide is based on a geometrical optical design developed by Dr. Puschmann and was produced in the frame of a Zemax ray-tracing in collaboration between Dipl. Ing. M. Woche & Dr. K.G. Puschmann

 

Please click here to see the talk

December 2012: 3 new publications

  • Puschmann, K.G., Balthasar, H., Bauer, S.M., et al.: “The GREGOR Fabry-Perot Interferometer - A New Instrument for High-Resolution Spectropolarimetric Solar Observations”, in: Magnetic Fields from the Photosphere to the Corona, Rimmele, T.R., eds., ASPC 463, 423
  • Schmidt, W., von der Lühe, O., Volkmer, R. ..., Puschmann, K.G., et al.: “The GREGOR solar telescope on Tenerife,” In: Magnetic Fields from the Photosphere to the Corona, Rimmele, T.R., eds., ASPC 463, 365
  • Denker, C.; Lagg, A.; Puschmann, K. G., et al.: "The GREGOR Solar Telescope", in Science with Large Solar Telescopes, Proceedings of IAU Special Session 6, held 22-24 August, 2012. Online at http://www.arcetri.astro.it/IAUSpS6, id.E2.03

 

 

December 2012: Finalizing and successful verification of the software-hardware interface -- GFPI liquid-christal level-converter -- for Stokes-V und full-Stokes vector-polarimetric measurements

File requires flash video installed

Movie: GFPI Liquid-Christal Level-converter (developed in collaboration with W. Steinhof, IAG) in Operation @ GREGOR. Movie @copyright Klaus Gerhard Puschmann.

 

 

 

January 2013, 2 new publications

  • Beck, C., Rezaei, R, Puschmann, K.G.: “The energy of waves in the photosphere and lower chromosphere: III. Inversion setup for Ca II H spectra in local thermal equilibrium”, A&A 549, 24
  • Balthasar, H., Beck, C., Gömöry, P., Muglach, K., Puschmann, K.G., Shimizu, T., Verma, M.: “Properties of a decaying sunspot”, Central European Astrophysical Bulletin, 37, 435
  •  

February 2013, 1 new publication

Beck, C., Rezaei, R., Puschmann, K.G.: “The energy of waves in the photosphere and lower chromosphere: IV. Inversion results of Ca II H spectra”, A&A, 533, A73

 

March 2013, 2 new publications

  • Puschmann, K. G., Denker, C., Balthasar et al.: “The GREGOR Fabry-Perot Interferometer and its companion the Blue Imaging Solar Spectrometer”, (modified and refereed version of Proc. SPIE 8446, 79, 2012), Opt. Eng. 52(8), 081606, 2013arXiv1302.7157P
  • Louis, R.E., Mathew, S.K., Puschmann, K.G., Beck, C., Balthasar, H.: "Formation of a penumbra in a decaying sunspot, A&A, 522, L7

 

April 2013, technical campaign - GREGOR and GFPI

  • Common alignment of GFPI, wavefront sensor, and GRIS
  • Complete new alignment of the GFPI to compensate the extensive errors comitted in a previous optical alignment performed by the AIP in 2010.
  • Evacuation of the Coude-train
  • Images of different telescope focal planes (F4 - pinhole array, F3 - pinhole/target, F2 - pinhole/grid) in NBC, BBC, BIC of the GFPI + sCMOS camera in the BBC, on different days, with different wind and weather conditions, with different exposure times, with and without AO, and "evacuated" and not "evacuated" Coude-train.
  • Test of sCMOS cameras at the OT: ->  not an appropriate option neither as a new camera for the NBC of the GFPI nor supposedly for the NBC of the BLISS: too low quantum efficiencies, too long exposure times, too low frame rates, no option for binning, limit of 100 ms exposure time.
  • Observations in 543.4 nm and 525.02 nm in Stokes I. Purpose: check of spectral resolution
  • Replacement of the GFPI/GRIS pentaprism by an experimental system of 3 plane mirrors.

          -> First rudamentary observations in Halpha.

          -> Ca II IR 854 nm: no adequate pre-filter, we have to order one with FWHM=0.5-0.6 nm and high  

              transmission and GOOD INFRARED BLOCKING.

  • Implementation of an new and automated polarimetric calibration module (Hardware, Software) to allow first observations and measurements of the solar magnetic field
  • Optimization of the DCP communication for all other observing modes. Updating the new DCP Software-server modul (of the instrument control-software) that has been developed by myself in 2011/2012  in collaboration with Dr. T. Seelemann (LaVision)
  • Calibration of the polarizer and retarder axes of the GPU (performed by Dr. H. Balthasar)
  • Optimization of the efficiencies of the vector-polarimeter of the GFPI and first polarimetric measurements including instrumental polarimetric calibration data

Many thanks to Dr. H. Balthasar for supporting this GREGOR/GFPI-Science-verification campaign.

 

Image @copyright Klaus Gerhard Puschmann - Click to enlarge the image
Image @copyright Klaus Gerhard Puschmann - Click to enlarge the image
Image @copyright Klaus Gerhard Puschmann - Click to enlarge the image

First difraction limited images ever observed @ the 1.5m GREGOR solar telescope, published in a contribution to Synergies between ground and space based solar research", 1st SOLARNET - 3rd EAST/ATST meeting, Oslo, 5-8 August 2013. The data have been reduced with iSPOR-DP, the Imaging Spectropolarimetric Parallel Organized Reconstruction Data Pipeline.

Image @copyright Klaus Gerhard Puschmann - Click to enlarge the image

First high spatial resolution spectra and line parameter maps from the GREGOR Fabry-Perot Interferometer @ GREGOR. Publication: "Synergies between ground and space based solar research", 1st SOLARNET - 3rd EAST/ATST meeting, Oslo, 5-8 August 2013. The data have been reduced with iSPOR-DP, the Imaging Spectropolarimetric Parallel Organized Reconstruction Data Pipeline.

Movie: GREGOR Fabry-Perot Interferometer Line-Scan of the 543.4 nm Line @ GREGOR. Red - observed average Quiet Sun profile, Blue - observed average Umbral Profile, black - Atlas Profile. Consecutive narrow-band images (left panel) @ different spectral positions (stars, right panel). Published in a contribution to Synergies between ground and space based solar research", 1st SOLARNET - 3rd EAST/ATST meeting, Oslo, 5-8 August 2013. The data have been reduced with iSPOR-DP, the Imaging Spectropolarimetric Parallel Organized Reconstruction Data Pipeline.

 

June 2013, 3 new publications

  • Gömöry, P., Balthasar, H., Puschmann, K.G.: "Evidence of quiet Sun chromospheric activity related to an emerging smale-scale magnetic loop", A&A, 556, A7 (2013)
  • Beck. C, Rezaei, R., Puschmann, K.G.: “Can spicules be detected on disc center in broad-band Ca II H filter imaging data?”, A&A, 556, 127 (2013)
  • Beck, C., Fabbian, D., Moreno Insertis, F., Puschmann, K. G., Rezaei, R.: “Thermodynamic fluctuations in solar photospheric three-dimensional convection simulations and observations”, A&A 557, A109 (2013)

 

August 2013, e-poster - "Synergies between ground and space based solar research", 1st SOLARNET - 3rd EAST/ATST meeting, Oslo, 5-8 August 2013

 

The e-Poster can be downloaded below and has been prepared during holidays in Austria 2013

Fully animated Powerpoint Presentation with Sound for download.
puschmann_oslo_final_ok_total.pptx
Microsoft Power Point-Präsentation [85.6 MB]

August 2013, technical campaign - GFPI

  • Replacement of the GFPI/GRIS pentaprism by a new 3-mirror system: now the entire wavelength range 380-860 nm is at the disposal for the instrument
  • Innovative Multi-Wavelenght Setup of the GREGOR Fabry-Perot Interferometer
  • Integration of a Halpha-Lyot (FWHM=0.05 nm) as additional filter in the Broad-Band Channel (BBC) of the GREGOR Fabry Perot Interferometer
  • First tests of a Ca II K Lyot (FWHM=0.03 nm) as additional filter in the Blue Imaging Channel (BIC) of the GREGOR Fabry-Perot Interferometer
  • Development of a provisional "flight-simulator" for multi-wavelength observations with the GREGOR Fabry-Perot Interferometer - to be replaced by a flight-simulator being developed at the Kiepenheuer Institut für Sonnenphysik Freiburg (KIS) at the 3rd floor of the telescope building.
  • Polarimetric calibration measurements during one entire day for comparison with a numerical model (unfortunately the numerical model provided by a colleague turned out to be inmature)
  • First spectropolarimteric observations ever in the 630.2 nm line (NBC) with context imaging at 630 nm (broad-band filter) and Halpha (Lyot-filter) in the BBC and at 430 nm (broad- band Gband-filter) and Ca II K (Lyot-filter) in the BIC.
  • Spectroscopic observations in Halpha and Ca II IR postponed to a later campaign due to bad weather conditions towards the end of the campaign.

Many thanks to Dr. H. Balthasar for supporting this GFPI Science-verification campaign.

Image @copyright Klaus Gerhard Puschmann - Click to enlarge the image

Many thanks to Dr. H. Balthasar and Dipl. Ing. S.M. Bauer for their kind and important contributions to the realization of the 3-Mirror System.

Image @copyright Klaus Gerhard Puschmann - Click to enlarge the image

The Halpha and Ca II K Lyot-Filters are part of the Einsteintower (AIP) and of the German Vakuum Tower Telescope (VTT), respectively.

Image @copyright Klaus Gerhard Puschmann - Click to enlarge the image

The Graphic was produced with Microsoft Powerpoint. The presented design is based on calculation performed in geometrical optics. Image @copyright Klaus Gerhard Puschmann The Halpha Lyot-Filter is part of the Einsteintower (AIP).

Image @copyright Klaus Gerhard Puschmann - Click to enlarge the image

Snapshots with iPhone5 of live raw images at different wavelengths for demonstration purposes of the complete potential of the GFPI@GREGOR -- central Flight-Simulator.

Image @copyright Klaus Gerhard Puschmann - Click to enlarge the image

Snapshots (iPhone5) of live raw images to unveil the complete potential of the GREGOR Fabry-Perot Interferometer in its Multi-Wavelength Setup@GREGOR including vector polarimetry. The Halpha Lyot-Filter is part of the Einsteintower (AIP)

Image @copyright - Klaus Gerhard Puschmann - Click to enlarge the image

Polarimetric Calibration Measurement with the GREGOR Fabry-Perot Interferometer @ the 1.5m GREGOR Solar Telescope (August 2013), demonstrating the excellent performance of the vector polarimetric mode of the instrument, including the new and automated instrumental calibration procedure that has been implemented in the instrument control software within a collaboration of La Vision Göttingen and myself. However, due to the alt-azimuthal mount of GREGOR, a time-dependent telescope model is required in addition for a precise calibration of the spectropolarimetric observations. The available model (under development by a former AIP colleague) unfortunately turned out to be immature/incomplete at this point.

Image @copyright Klaus Gerhard Puschmann - Click to enlarge the image
 

Observational Targets - August 2013 - GREGOR Fabry-Perot Interferometer @ 1.5m GREGOR Solar Telescope. The broadband reconstructions have been performed with a modified version (Puschmann & Sailer, 2006, A&A 454, 1011) of the Göttingen broadband reconstruction code (de Boer, 1993, PHD-Thesis) acounting for the field dependend correction of Adaptive Optics, which is part of the GFPI-Datepipeline (Puschmann & Beck, 2011, A&A 533, 21) iSPOR-DP, Imaging Spectropolarimetric Parallel Organized Reconstruction Data Pipeline. Targets: Sunspots and a quiet solar region at different heliocentric angles. The data have been processed on iSPOR-S, the Imaging Spectropolarimetric Parallel Organized Reconstruction Server. The related spectroscopic and spectropolarimetric data as well as the context Interference and Lyot Filter Imaging Data are under reduction and careful analysis. For detailed results see Breaking News 2015.

Image @copyright - Klaus Gerhard Puschmann - Click to enlarge the image
Interference and Lyot Filter Context-Imaging - August 2013 - Innovative Multi-Wavelength Setup of the GREGOR Fabry-Perot Interferometer @ 1.5m GREGOR Solar Telescope, in addition to spectroscopic and spectropolarimteric measurements to sample structure and dynamics at different solar atmospheric layers. The broadband reconstructions have been performed with a modified version (Puschmann & Sailer, 2006, A&A 454, 1011) of the Göttingen broadband reconstruction code (de Boer, 1993, PHD-Thesis) acounting for the field dependend correction of Adaptive Optics,  which is part of the GFPI-Datepipeline (Puschmann & Beck, 2011, A&A 533, 21) iSPOR-DP, Imaging Spectropolarimetric Parallel Organized Reconstruction Data Pipeline. The data have been processed on iSPOR-S, the Imaging Spectropolarimetric Parallel Organized Reconstruction Server. For detailed results see Breaking News 2015.

October 2013, technical campaign - GFPI

  • Fist Ca II IR spectra ever observed with the instrument
  • First Halpha spectra ever observed with the instrument @ GREGOR.
  • Newly purchased Ca II IR prefilter in the NBC with good infrared blocking
  • Innovative Multi-Wavelength Setup of the GREGOR Fabry-Perot Interferometer @ 1.5m GREGOR Solar Telescope (654nm, 854 nm, G-band, Halpha Lyot, Ca II K Lyot imaging) to sample structure and dynamics at different solar atmospheric layers. !! Most of these data are still exclusively retained by the AIP, very likely  to avoid their publication, to withhold their existance or to embezzle the creator ship.
  • Improvements - image quality - Blue Imaging Channel (BIC) - replacement of lenses  f=500 mm by lenses f=800 mm to reduce the reflex images produced by the Ca II K - Lyot filter in the focal plane.

 

Image @copyright - Klaus Gerhard Puschmann - Click to enlarge the image

Sensational Breakthrough October 2013! First Halpha Spectra ever observed with the GREGOR Fabry-Perot Interferometer @ 1.5m GREGOR Solar Telescope. The broad-band reconstructions have been performed with a modified version (Puschmann & Sailer, 2006, A&A 454, 1011) of the Goettingen broad-band reconstruction code (de Boer, 1993, PHD-Thesis) acounting for the field dependend correction of Adaptive Optics. The narrow-band data have been deconvolved using a modified version of a code developed by Krieg et al., 1999, A&A 343, 983 and K. Janssen, 2003, PHD-Thesis wich is based on the method of Keller & v.d. Luehe, 1992, A&A 261, 321. The codes are part of the GFPI-Datpipeline (Puschmann & Beck, 2011, A&A 533, 21) iSPOR-DP, Imaging Spectropolarimetric Parallel Organized Reconstruction Data Pipeline. The data have been processed on iSPOR-S, the Imaging Spectropolarimetric Parallel Organized Reconstruction Server.

Image @copyright - Klaus Gerhard Puschmann - Click to enlarge the image

Sensational Breakthrough October 2013! First Ca II IR spectra ever observed with the GREGOR Fabry-Perot Interferometer. The broad-band reconstructions have been performed with a modified version (Puschmann & Sailer, 2006, A&A 454, 1011) of the Göttingen broadband reconstruction code (de Boer, 1993, PHD-Thesis) acounting for the field dependend correction of Adaptive Optics. The narrow-band data have been deconvolved using a modified version of a code developed by Krieg et al., 1999, A&A 343, 983 and K. Janssen, 2003, PHD-Thesis wich is based on the method of Keller & v.d. Luehe, 1992, A&A 261, 321. The codes are part of the GFPI-Datpipeline (Puschmann & Beck, 2011, A&A 533, 21) iSPOR-DP, Imaging Spectropolarimetric Parallel Organized Reconstruction Data Pipeline. The data have been processed on iSPOR-S, the Imaging Spectropolarimetric Parallel Organized Reconstruction Server.

October 2013, finishing the optical design for the new Laser-Photomultiplier channel of the GFPI in collaboration with Dipl. Ing. M. Woche and Dipl. Ing. S.M. Bauer

Click to enlarge the image

CAD-design kindly provided by Dipl. Ing. S.M. Bauer @copyright.The new Laser-beam deals with  a 50 mm pupil-image in the vicinity of the etalons allowing a more precise tuning of the etalon finesse including a larger area of the surface of the latter. This shall improve furthermore dramatically the spectral resolution of the spectro-polarimeter.

 

November 2013, 1 new publication

Louis, R.E., Puschmann, K.G., Kliem, B., Balthasar, H., Denker, C.: "Sunspot splitting triggering an eruptive flare", A&A, 562, id.A110

 

December 2013, 1 new publication

Louis, R.E, Balthasar, H., Kuckein, C., Gömöry, P., Puschmann, K.G., Denker, C.:"The association between sunspot magnet fields and superpenumbral filaments", AN, 335, 161

 

The unexpected und unpleasant End of the story

What happend hereafter one can read in the introduction of this Homepage and in my Posts on LinkedIn.

 

After my violent and unpredictable expulsion from the AIP at the last day of employment, the institute retained all the above data exclusively for several months until mid 2014. It needed a long lasting juridical process with huge private expenses to receive at least some copies of my original data. Until today the AIP withholds the remaining data to me, to the scientific community and to public outreach as it withholds all my contributions and achievements to the instrument over more than 13 years. In two letters, the AIP asked either for a bilateral renunciation of the use of these data for scientific publications and announced the elimination of all remaining data that were not explicitly specified by myself. Really an unbelievable and marginal story.

 

All technical innovations and observational results to the GREGOR Fabry-Pérot interferomter at the 1.5m GREGOR Solar Telescope that I achieved in 2013 are summarized within the article cited below that I published in 02/2016:

 

****************************************************

 

The GREGOR Fabry Perot Interferometer (GFPI) - Technical Innovations and Results achieved in 2013

 

Klaus Gerhard Puschmann

 

2016arXiv160205783P


****************************************************

Druckversion Druckversion | Sitemap
© Dr. Klaus Gerhard Puschmann