Dr. Oliver Krause Profile

Dr. Oliver Krause

Head of Infrared Space Astronomy Group at Max-Planck-Institut für Astronomie

SPIE Involvement:

Author

Publications (29)

Proceedings Article | 23 December 2020 Poster

Poster

The SAFARI grating spectrometer for SPICA: Extreme spectroscopic sensitivity in the FAR-IR

Peter Roelfsema, Pieter Dieleman, Willem Jellema, Gert de Lange, Jaap Evers, Shoko Jin, Martin Giard, Francisco Najarro, Charles Bradford, Marc Audard, Stafford Withington, Yasuo Doi, Frank Helmich, Mika Juvela, Franz Kerschbaum, Csaba Kiss, Oliver Krause, Bengt Larsson, David Naylor, Luigi Spinoglio, Ryszard Szczerba, Floris van der Tak, Bart Vandenbussche, Shiang-Yu Wang

Proceedings Volume 11443, 114436W (2020) https://doi.org/10.1117/12.2563140

KEYWORDS: Spectroscopes, Spectroscopy, Sensors, Beam steering, Mirrors, Galactic astronomy, Observatories, Relays, Signal detection, Telescopes

Proceedings Article | 13 December 2020 Presentation

Presentation

The joint infrared space observatory SPICA: unveiling the obscured universe

Peter Roelfsema, Hiroshi Shibai, Hidehiro Kaneda, Marc Sauvage, Martin Giard, Francisco Najarro, Charles Bradford, Toru Yamada, Jan Tauber, Marc Audard, Pieter Dieleman, Yasuo Doi, David Elbaz, Matt Griffin, Frank Helmich, Astrid Heske, Mitsuhiko Honda, Willem Jellema, Shoko Jin, Mika Juvela, Inga Kamp, Franz Kerschbaum, Csaba Kiss, Kotaro Kohno, Oliver Krause, Gert de Lange, Bengt Larsson, Jesus Martin-Pintado, Hideo Matsuhara, Takao Nakagawa, Tohru Nagao, David Naylor, Hideko Nomura, Hiroyuki Ogawa, Takashi Onaka, Jacques Rouquet, Luigi Spinoglio, Ryszard Szczerba, Floris van der Tak, Bart Vandenbussche, Shiang-Yu Wang, Stafford Withington

Proceedings Volume 11443, 1144325 (2020) https://doi.org/10.1117/12.2562946

KEYWORDS: Infrared Space Observatory, Sensors, Telescopes, Spectroscopes, Imaging systems, Liquids, Cryogenics, Observatories, Ions, Molecules

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Proceedings Article | 10 July 2018 Presentation

Presentation

SPICA: a joint infrared space observatory (Conference Presentation)

Peter Roelfsema, Hiroshi Shibai, Kees Wafelbakker, Gert de Lange, Martin Giard, Francisco Najarro, Marc Audard, Lee Armus, Charles Bradford, Yasuo Doi, Matt Griffin, Frank Helmich, Inga Kamp, Hidehiro Kaneda, Ciska Kemper, Franz Kerschbaum, Kotaro Kohno, Oliver Krause, Bengt Larsson, Sue Madden, Hideo Matsuhara, Takao Nakagawa, David Naylor, Hiroyuki Ogawa, Takashi Onaka, Luigi Spinoglio, Floris van der Tak, Bart Vandenbussche, Toru Yamada

Proceedings Volume 10698, 106980A (2018) https://doi.org/10.1117/12.2313124

KEYWORDS: Space telescopes, Telescopes, Infrared Space Observatory, Planetary systems, Infrared radiation, Infrared telescopes, Galaxy evolution, Sensors, Cryogenics, Spectroscopes

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Measurements in the infrared wavelength domain allow us to assess directly the physical state and energy balance of cool matter in space, thus enabling the detailed study of the various processes that govern the formation and early evolution of stars and planetary systems in the Milky Way and of galaxies over cosmic time. Previous infrared missions, from IRAS to Herschel, have revealed a great deal about the obscured Universe, but sensitivity has been limited because up to now it has not been possible to fly a telescope that is both large and cold. Such a facility is essential to address key astrophysical questions, especially concerning galaxy evolution and the development of planetary systems. SPICA is a mission concept aimed at taking the next step in mid- and far-infrared observational capability by combining a large and cold telescope with instruments employing state-of-the-art ultra-sensitive detectors. The mission concept foresees a 2.5-meter diameter telescope cooled to below 8 K. Rather than using liquid cryogen, a combination of passive cooling and mechanical coolers will be used to cool both the telescope and the instruments. With cooling not dependent on a limited cryogen supply, the mission lifetime can extend significantly beyond the required three years. The combination of low telescope background and instruments with state-of-the-art detectors means that SPICA can provide a huge advance on the capabilities of previous missions. The SPICA instrument complement offers spectral resolving power ranging from ~50 through 11000 in the 17-230 µm domain as well as ~28.000 spectroscopy between 12 and 18 µm. Additionally, SPICA will be capable of efficient 30-37 µm broad band mapping, and small field spectroscopic and polarimetric imaging in the 100-350 µm range. SPICA will enable far infrared spectroscopy with an unprecedented sensitivity of ~5x10-20 W/m2 (5σ/1hr) - at least two orders of magnitude improvement over what has been attained to date. With this exceptional leap in performance, new domains in infrared astronomy will become accessible, allowing us, for example, to unravel definitively galaxy evolution and metal production over cosmic time, to study dust formation and evolution from very early epochs onwards, and to trace the formation history of planetary systems.

Proceedings Article | 10 July 2018 Presentation

Presentation

The HabEx workhorse camera (Conference Presentation)

Daniel Stern, John Clarke, Scott Gaudi, Alina Kiessling, Oliver Krause, Stefan Martin, Paul Scowen, Rachel Somerville

Proceedings Volume 10698, 106980R (2018) https://doi.org/10.1117/12.2314147

KEYWORDS: Cameras, Exoplanets, Astrophysics, Galaxy evolution, Spectroscopes, Solar system, Imaging systems, Astronomical imaging, Spectroscopy

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Proceedings Article | 6 July 2018 Paper

Paper

Far-infrared space interferometer study IRASSI: motivation, principle design, and technical aspects

Hendrik Linz, Luisa Buinhas, Roger Förstner, Matthias Lezius, Divya Bhatia, Simon Batz-dorfer, Katja Beha, Ulf Bestmann, Bernd Eissfeller, Meltem Eren Copur, Eloi Ferrer, Kathrin Frankl, Oliver Krause, Yongjin Moon, Mathias Philips-Blum, Silvia Scheithauer, Meiko Steen

Proceedings Volume 10698, 1069852 (2018) https://doi.org/10.1117/12.2313801

KEYWORDS: Satellites, Telescopes, Space telescopes, Interferometers, Spatial resolution, Interferometry, Optical correlators, Terahertz radiation, Space operations, Far infrared

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The far-infrared (FIR) regime is one of the few wavelength ranges where no astronomical data with sub-arcsecond spatial resolution exist yet. Also medium-term satellite projects like SPICA, Millimetron or OST will not resolve this malady. For many research areas, however, information at high spatial and spectral resolution in the FIR, taken from atomic fine-structure lines, from highly excited CO and especially from water lines would open the door for transformative science. These demands call for interferometric concepts. We present here first results of our feasibility study IRASSI (Infrared Astronomy Satellite Swarm Interferometry) for an FIR space interferometer. Extending on the principal concept of the previous study ESPRIT, it features heterodyne interferometry within a swarm of 5 satellite elements. The satellites can drift in and out within a range of several hundred meters, thereby achieving spatial resolutions of <0.1 arcsec over the whole wavelength range of 1–6 THz. Precise knowledge on the baselines will be ensured by metrology employing laser frequency combs, for which first ground-based tests have been designed by members of our study team. In this contribution, we first give a motivation how the science requirements translated into operational and design parameters for IRASSI. Our consortium has put much emphasis on the navigational aspects of such a free-flying swarm of satellites operating in relatively close vicinity. We hence present work on the formation geometry, the relative dynamics of the swarm, and aspects of our investigation towards attitude estimation. Furthermore, we discuss issues regarding the real-time capability of the autonomous relative positioning system, which is an important aspect for IRASSI where, due to the large raw data rates expected, the interferometric correlation has to be done onboard, quasi in real-time. We also address questions regarding the spacecraft architecture and how a first thermomechanical model is used to study the effect of thermal perturbations on the spacecraft. This will have implications for the necessary internal calibration of the local tie between the laser metrology and the phase centres of the science signals.

Proceedings Article | 27 September 2012 Paper

Paper

The Exoplanet Characterization Observatory (EChO): performance model EclipseSim and applications

Roy van Boekel, Björn Benneke, Kevin Heng, Renyu Hu, Nikku Madhusudhan, Sascha Quanz, Yan Bétrémieux, Jeroen Bouwman, Guo Chen, Leen Decin, Remco de Kok, Adrian Glauser, Manuel Güdel, Peter Hauschildt, Thomas Henning, Sandra Jeffers, Sheng Jin, Lisa Kaltenegger, Franz Kerschbaum, Oliver Krause, Helmut Lammer, Armin Luntzer, Michael Meyer, Yamila Miguel, Christoph Mordasini, Roland Ottensamer, Theresa Rank-Lueftinger, Ansgar Reiners, Timo Reinhold, Hans Martin Schmid, Ignas Snellen, Daphne Stam, Zhao Sun, Bart Vandenbussche

Proceedings Volume 8442, 84421F (2012) https://doi.org/10.1117/12.926794

KEYWORDS: Planets, Stars, Signal to noise ratio, Exoplanets, Spectral resolution, Spectroscopy, Performance modeling, Sensors, Atmospheric modeling, Atmospheric optics

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Proceedings Article | 21 September 2012 Paper

Paper

Visible/infrared spectrometer for EChO

O. Krause, A. Glauser, R. van Boekel, M. Güdel, T. Henning, M. Meyer, D. Stam, B. Vandenbussche, U. Grözinger, U. Klaas, R. Lenzen, F. Müller, R. Ottensamer, S. Quanz, E. Renotte, R.-R. Rohloff, H.-M. Schmid, J.-R. Schrader, U. Wehmeier

Proceedings Volume 8442, 84421H (2012) https://doi.org/10.1117/12.927157

KEYWORDS: Sensors, Spectroscopy, Calibration, Telescopes, Mirrors, Signal to noise ratio, Infrared spectroscopy, Space telescopes, Thermography, Exoplanets

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Proceedings Article | 13 September 2012 Paper

Paper

The JWST MIRI FM wheel mechanisms characterisation for open loop drive

Örs Hunor Detre, Ulrich Grözinger, Oliver Krause, Friedrich Müller, Silvia Scheithauer

Proceedings Volume 8450, 84501Z (2012) https://doi.org/10.1117/12.926661

KEYWORDS: Cryogenics, Fermium, Frequency modulation, James Webb Space Telescope, Sensors, Reliability, Position sensors, Data modeling, Space telescopes, Aerospace engineering

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Proceedings Article | 15 September 2011 Paper

Paper

A filter mount for the Euclid mission

Rory Holmes, Ulrich Grözinger, Peter Bizenberger, Oliver Krause

Proceedings Volume 8146, 814611 (2011) https://doi.org/10.1117/12.893894

KEYWORDS: Image filtering, Optical components, Silica, Near infrared, Optical filters, Interfaces, Photometry, Finite element methods, Prototyping, Space operations

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Proceedings Article | 10 August 2010 Paper

Paper

The Euclid near-infrared calibration source

Rory Holmes, Peter Bizenberger, Oliver Krause, Mario Schweitzer, Adrian Glauser

Proceedings Volume 7731, 77312V (2010) https://doi.org/10.1117/12.857038

KEYWORDS: Calibration, Lamps, Diffusers, Reflectors, Tungsten, Scattering, Optical components, Optical simulations, Camera shutters, Sensors

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Proceedings Article | 6 August 2010 Paper

Paper

NIP: the near infrared imaging photometer for Euclid

Mario Schweitzer, Ralf Bender, Reinhard Katterloher, Frank Eisenhauer, Reiner Hofmann, Roberto Saglia, Rory Holmes, Oliver Krause, Hans-Walter Rix, Jeff Booth, Parker Fagrelius, Jason Rhodes, Suresh Seshadri, Alexandre Refregier, Jerome Amiaux, Jean-Louis Augueres, Olivier Boulade, Christophe Cara, Adam Amara, Simon Lilly, Eli Atad-Ettedgui, Anna-Maria Di Giorgio, Ludovic Duvet, Christopher Kuehl, Mohsin Syed

Proceedings Volume 7731, 77311K (2010) https://doi.org/10.1117/12.857031

KEYWORDS: Sensors, Near infrared, Staring arrays, Electronics, Monochromatic aberrations, Photometry, Point spread functions, Thermography, Galactic astronomy, Interfaces

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Proceedings Article | 21 July 2010 Paper

Paper

A filter wheel mechanism for the Euclid near-infrared imaging photometer

Rory Holmes, Ulrich Grözinger, Oliver Krause, Mario Schweitzer

Proceedings Volume 7739, 77391A (2010) https://doi.org/10.1117/12.856941

KEYWORDS: Prototyping, Chemical elements, Space telescopes, Photometry, Titanium, Optical filters, Optical components, Image filtering, Space operations, Visible radiation

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Proceedings Article | 20 July 2010 Paper

Paper

High-precision cryogenic wheel mechanisms of the JWST/MIRI instrument: performance of the flight models

O. Krause, F. Müller, S. Birkmann, A. Böhm, M. Ebert, U. Grözinger, Th. Henning, R. Hofferbert, A. Huber, D. Lemke, R.-R. Rohloff, S. Scheithauer, T. Gross, T. Fischer, G. Luichtel, H. Merkle, M. Übele, H.-U. Wieland, J. Amiaux, R. Jager, A. Glauser, P. Parr-Burman, J. Sykes

Proceedings Volume 7739, 773918 (2010) https://doi.org/10.1117/12.856887

KEYWORDS: Interfaces, Kinematics, James Webb Space Telescope, Cryogenics, Position sensors, Performance modeling, Optical filters, Instrument modeling, Sensors, Magnetism

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Proceedings Article | 25 July 2008 Paper

Paper

Cryogenic wheel mechanisms for the Mid-Infrared Instrument (MIRI) of the James Webb Space Telescope (JWST): detailed design and test results from the qualification program

O. Krause, S. Birkmann, T. Blümchen, A. Böhm, M. Ebert, U. Grözinger, Th. Henning, R. Hofferbert, A. Huber, D. Lemke, R.-R. Rohloff, S. Scheithauer, T. Gross, G. Luichtel, C. Stein, R. Stott, M. Übele, J. Amiaux, J.-L. Auguères, A. Glauser, A. Zehnder, M. Meijers, R. Jager, P. Parr-Burrman, G. Wright

Proceedings Volume 7018, 701824 (2008) https://doi.org/10.1117/12.789319

KEYWORDS: Interfaces, James Webb Space Telescope, Kinematics, Cryogenics, Position sensors, Sensors, Mid-IR, Magnetism, Spectroscopy, Optical filters

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Proceedings Article | 23 July 2008 Paper

Paper

High-precision cryogenic wheel mechanisms for the JWST NIRSpec instrument

Kai Weidlich, Manfred Fischer, Marc Ellenrieder, Torsten Gross, Jean-Christophe Salvignol, Reiner Barho, Christian Neugebauer, Günter Königsreiter, Michael Trunz, Friedrich Müller, Oliver Krause

Proceedings Volume 7018, 701821 (2008) https://doi.org/10.1117/12.789663

KEYWORDS: Optical components, Optical alignment, Cryogenics, Prisms, Optical filters, Position sensors, Sensors, Aerospace engineering, Magnetism, James Webb Space Telescope

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Proceedings Article | 22 July 2008 Paper

Paper

Cold performance tests of blocked-impurity-band Si:As detectors developed for DARWIN

Stephan Birkmann, Jutta Stegmaier, Ulrich Grözinger, Oliver Krause, Tim Souverijns, Jan Putzeys, Deniz Sabuncuoglu Tezcan, Koen De Munck, Paolo Fiorini, Kiki Minoglou, Patrick Merken, Chris Van Hoof, Piet De Moor

Proceedings Volume 7021, 70210R (2008) https://doi.org/10.1117/12.789103

KEYWORDS: Sensors, Electronics, Quantum efficiency, Temperature metrology, Signal detection, Black bodies, Bolometers, Bandpass filters, Monochromators, Camera shutters

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Proceedings Article | 12 July 2008 Paper

Paper

Preparing Herschel's commissioning phase: Ge:Ga detector tuning

Jutta Stegmaier, Stephan Birkmann, Ulrich Grözinger, Oliver Krause, Dietrich Lemke

Proceedings Volume 7010, 701009 (2008) https://doi.org/10.1117/12.788180

KEYWORDS: Sensors, Particles, Calibration, Infrared sensors, Space telescopes, Environmental sensing, Space operations, Infrared telescopes, Telescopes, Solar processes

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Proceedings Article | 12 July 2008 Paper

Paper

Development approach and first infrared test results of JWST/Mid Infra Red Imager Optical Bench

J. Amiaux, F. Alouadi, J. L. Augueres, P. Bouchet, M. Bouzat, C. Cavarroc, C. Cloue, P. De Antoni, D. Desforges, A. Donati, D. Dubreuil, D. Eppelle, F. Gougnaud, B. Hervieu, P. O. Lagage, D. Leboeuf, I. Le Mer, Y. Lussignol, P. Mattei, F. Meigner, V. Moreau, E. Pantin, P. Perrin, S. Ronayette, G. Tauzin, S. Poupar, D. Wright, A. Glasse, G. Wright, E. Mazy, J. Y. Plesseria, E. Renotte, T. Ray, A. Abergel, P. Guillard, Y. Longval, M. Ressler, J. M. Reess, R. Hofferbert, O. Krause, K. Justtanont, G. Olofsson

Proceedings Volume 7010, 70100U (2008) https://doi.org/10.1117/12.789027

KEYWORDS: Cryogenics, Mirrors, Inspection, Performance modeling, Point spread functions, Image quality, Optical testing, James Webb Space Telescope, Aerospace engineering, Imaging systems

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Proceedings Article | 26 September 2007 Paper

Paper

Transients in stressed Ge:Ga photoconductors under high background for PACS

Jutta Stegmaier, Stephan Birkmann, Ulrich Grözinger, Nancy Haegel, Dietrich Lemke, Oliver Krause

Proceedings Volume 6678, 667808 (2007) https://doi.org/10.1117/12.734354

KEYWORDS: Sensors, Picture Archiving and Communication System, Photoresistors, Infrared radiation, Signal detection, Infrared sensors, Calibration, Crystals, Mirrors, Spectrometers

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Proceedings Article | 12 September 2007 Paper

Paper

Development of a Si:As blocked impurity band detector for far IR detection

Deniz Tezcan, Jan Putzeys, Koen De Munck, Tim Souverijns, Patrick Merken, Paolo Fiorini, Chris Van Hoof, Thierry Dartois, Claude Israbian, Stephan Birkmann, Jutta Stegmaier, Ulrich Grözinger, Oliver Krause, Piet De Moor

Proceedings Volume 6660, 66600R (2007) https://doi.org/10.1117/12.733779

KEYWORDS: Sensors, Detector arrays, Semiconducting wafers, Infrared sensors, Silicon, Capacitors, Amplifiers, Infrared radiation, Indium, Cryogenics

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Proceedings Article | 10 July 2006 Paper

Paper

Cryogenic filter- and spectrometer wheels for the Mid Infrared Instrument (MIRI) of the James Webb Space Telescope (JWST)

D. Lemke, A. Böhm, F. de Bonis, M. Ebert, T. Gross, U. Grözinger, T. Henning, M. Hinz, R. Hofferbert, A. Huber, O. Krause, S. Kuhlmann, G. Luichtel, J. Ramos, R.-R. Rohloff, C. Stein, M. Trunz, M. Übele, K. Weidlich

Proceedings Volume 6273, 627324 (2006) https://doi.org/10.1117/12.671230

KEYWORDS: James Webb Space Telescope, Optical filters, Spectroscopy, Interfaces, Mid-IR, Kinematics, Cryogenics, Infrared spectroscopy, Imaging systems, Optical components

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Proceedings Article | 6 July 2006 Paper

Paper

The cold focal plane chopper of HERSCHEL's PACS instrument

Oliver Krause, Dietrich Lemke, Ralph Hofferbert, Armin Böhm, Ulrich Klaas, Josef Katzer, Frank Höller, Manfred Salvasohn

Proceedings Volume 6273, 627325 (2006) https://doi.org/10.1117/12.671271

KEYWORDS: Picture Archiving and Communication System, Mirrors, Prototyping, Manufacturing, Magnetism, Resistance, Position sensors, Actuators, Sensors, Calibration

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Proceedings Article | 6 July 2006 Paper

Paper

The grating and filter wheels for the JWST NIRSpec instrument

K. Weidlich, M. Sedlacek, M. Fischer, M. Trunz, M. Ellenrieder, D. Lemke, O. Krause, R. Hofferbert, U. Grözinger, G. Königsreiter, C. Neugebauer

Proceedings Volume 6273, 627323 (2006) https://doi.org/10.1117/12.670692

KEYWORDS: Optical filters, Optical components, Prisms, Diffraction gratings, Cryogenics, Position sensors, Optical design, James Webb Space Telescope, Mirrors, Structural design

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Proceedings Article | 16 June 2006 Paper

Paper

A test setup for the characterization of far-infrared filters under cryogenic conditions

Stephan Birkmann, Ulrich Grözinger, Jutta Stegmaier, Oliver Krause, Eckhard Pitz, Dietrich Lemke

Proceedings Volume 6275, 62750S (2006) https://doi.org/10.1117/12.671121

KEYWORDS: Optical filters, Bolometers, Sensors, Cryogenics, Spectrometers, Monochromators, Black bodies, Spectral resolution, Absorption, Mirrors

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Proceedings Article | 14 June 2006 Paper

Paper

Laboratory simulation of cosmic radiation effects on stressed Ge:Ga detectors at L2 and curing

Jutta Stegmaier, Stephan Birkmann, Ulrich Grözinger, Reinhard Katterloher, Oliver Krause, Dietrich Lemke

Proceedings Volume 6265, 62652H (2006) https://doi.org/10.1117/12.671128

KEYWORDS: Sensors, Particles, Radiation effects, Picture Archiving and Communication System, Cesium, Calibration, Infrared sensors, Photons, Black bodies, Environmental sensing

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Proceedings Article | 29 September 2004 Paper

Paper

Prototyping of cryomechanisms for the JWST near-infrared spectrograph (NIRSpec)

Ralph Hofferbert, Dietrich Lemke, Armin Bohm, Ulrich Grozinger, Thomas Henning, Armin Huber, Oliver Krause, Stefan Mertin, Jose Ramos, Ralf-Rainer Rohloff, Georg Luichtel, Kai Weidlich, Gilles Baudin, Winfried Posselt, Ruben Nalbandian, Peter Jensen

Proceedings Volume 5495, (2004) https://doi.org/10.1117/12.550419

KEYWORDS: Mirrors, James Webb Space Telescope, Actuators, Prototyping, Optical filters, Space telescopes, Spectrographs, Linear filtering, Sensors, Astronomical imaging

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Proceedings Article | 19 December 2002 Paper

Paper

Multiwavelength data mining of the ISOPHOT serendipity sky survey

Manfred Stickel, Dietrich Lemke, Ulrich Klaas, Oliver Krause, R. Vavrek, L. Toth, Stephan Hotzel

Proceedings Volume 4847, (2002) https://doi.org/10.1117/12.460437

KEYWORDS: Galactic astronomy, Databases, Stars, Sensors, Calibration, Temperature metrology, Field emission displays, Surface conduction electron emitter displays, Data analysis, Far infrared

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The ISOPHOT C200 stressed Ge:Ga array aboard the Infrared Space Observatory was used to carry out scientific observations while the telescope was moved from one target to the next. These strip scanning measurements of the sky in the far-infrared (FIR) at 170 μm comprise the ISOPHOT Serendipity Survey, the first slew survey designed as an integral part of a space observatory mission. The ISOPHOT Serendipity Survey is the only large scale sky survey in the unexplored wavelength region beyond the IRAS 100 μm limit to date. Within nearly 550 hours more than 12000 slew measurements with a total slew length of more than 150000 degrees were collected, corresponding to a sky coverage of about 15%. The slew data analysis has been focused on the detection of compact sources, which required the development of special algorithms. A severe problem at 170 μm is the confusion of genuine compact sources with foreground galactic cirrus knots and ridges. The selection and identification of objects therefore necessarily requires a multi-wavelengths approach, which makes use of a broad variety of additional data from databases and other surveys. Known galaxies were identified by cross-correlating the Serendipity Survey source positions with galaxy entries in the NED and Simbad databases and a subsequent cross-check of optical images from the Digital Sky Survey. A large catalogue with 170 μm fluxes for ≈2000 galaxies is being complied. The particularly interesting rare galaxies with very cold dust and very large dust masses further require additional FIR data from the IRAS survey as well as measured redshifts. A large fraction of the compact galactic structures are prestellar cores inside cold star forming regions. Early stages of medium and high mass star forming regions are identified by combining compact bright and cold Serendipity Survey sources with the near-infrared 2MASS and MSX surveys, the combination of which indicates large dust masses in conjunction with embedded young stars of early spectral types. In all the studied samples of different object classes the 170 μm flux provides the crucial data point for a complete characterization of the FIR spectral energy distributions and the derivation of total dust masses. Follow-up observations are underway to study selected objects in more detail.

Proceedings Article | 16 November 2000 Paper

Paper

Cold focal plane chopper for the PACS instrument of the FIRST satellite: tests of an advanced prototype

Oliver Krause, Dietrich Lemke, Ulrich Groezinger, Armin Boehm, Harald Baumeister, Ralf-Rainer Rohloff

Proceedings Volume 4131, (2000) https://doi.org/10.1117/12.406561

KEYWORDS: Prototyping, Picture Archiving and Communication System, Mirrors, Position sensors, Magnetism, Modulation, Cryogenics, Actuators, Aluminum, Satellites

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Proceedings Article | 6 December 1999 Paper

Paper

Focal plane chopper for the PACS instrument aboard the far-infrared space telescope FIRST

Dietrich Lemke, Ulrich Groezinger, Oliver Krause, Ralf-Rainer Rohloff, Ruediger Haberland

Proceedings Volume 3759, (1999) https://doi.org/10.1117/12.372697

KEYWORDS: Picture Archiving and Communication System, Magnetism, Space telescopes, Cryogenics, Prototyping, Mirrors, Resistance, Actuators, Manufacturing, Copper

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Showing 5 of 29 publications

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