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Real Time - bolometer
Scanamorphos: a map-making software for Herschel and similar scanning bolometer arrays. (arXiv:1205.2576v1 [astro-ph.IM])
13 May 2012, 8:28 pm
Brown astroph
Scanamorphos: a map-making software for Herschel and similar scanning bolometer arrays. (arXiv:1205.2576v1 [astro-ph.IM]) - http://arxiv.org/abs/1205.2576
May 13
from astro-ph updates on arXiv.org
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Authors: Hélène Roussel (Institut d'Astrophysique de Paris) Scanamorphos is one of the public softwares available to post-process scan observations performed with the Herschel photometer arrays. This post-processing mainly consists in subtracting the total low-frequency noise (both its thermal and non-thermal components), masking cosmic ray hit residuals, and projecting the data onto a map. Although it was developed for Herschel, it is also applicable with minimal adjustment to scan observations made with other bolometer arrays, provided they entail sufficient redundancy; it was successfully applied to P-Artemis, an instrument operating on the APEX telescope. Contrary to most other algorithms (first developed for microwave background experiments and later adapted to Herschel), Scanamorphos does not assume any particular noise model, and does not apply any Fourier-space filtering to the data, but is an empirical tool using purely the redundancy built in the observations -- taking... - Alex
Scanamorphos: a map-making software for Herschel and similar scanning bolometer arrays. (arXiv:1205.2576v1 [astro-ph.IM])
13 May 2012, 8:28 pm
Brown astro-ph
Scanamorphos: a map-making software for Herschel and similar scanning bolometer arrays. (arXiv:1205.2576v1 [astro-ph.IM]) - http://arxiv.org/abs/1205.2576
May 13
from astro-ph updates on arXiv.org
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Authors: Hélène Roussel (Institut d'Astrophysique de Paris) Scanamorphos is one of the public softwares available to post-process scan observations performed with the Herschel photometer arrays. This post-processing mainly consists in subtracting the total low-frequency noise (both its thermal and non-thermal components), masking cosmic ray hit residuals, and projecting the data onto a map. Although it was developed for Herschel, it is also applicable with minimal adjustment to scan observations made with other bolometer arrays, provided they entail sufficient redundancy; it was successfully applied to P-Artemis, an instrument operating on the APEX telescope. Contrary to most other algorithms (first developed for microwave background experiments and later adapted to Herschel), Scanamorphos does not assume any particular noise model, and does not apply any Fourier-space filtering to the data, but is an empirical tool using purely the redundancy built in the observations -- taking... - Alex
Molecular line contamination in the SCUBA-2 450 {\mu}m and 850 {\mu}m continuum data. (arXiv:1204.6180v1 [astro-ph.GA])
29 April 2012, 7:56 pm
Brown astroph
Molecular line contamination in the SCUBA-2 450 {\mu}m and 850 {\mu}m continuum data. (arXiv:1204.6180v1 [astro-ph.GA]) - http://arxiv.org/abs/1204.6180
April 29
from astro-ph updates on arXiv.org
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Authors: E. Drabek, J. Hatchell, P. Friberg, J. Richer, S. Graves, J. V. Buckle, D. Nutter, D. Johnstone, J. Di Francesco Observations of the dust emission using millimetre/submillimetre bolometer arrays can be contaminated by molecular line flux, such as flux from 12CO. As the brightest molecular line in the submillimetre, it is important to quantify the contribution of CO flux to the dust continuum bands. Conversion factors were used to convert molecular line integrated intensities to flux detected by bolometer arrays in mJy per beam. These factors were calculated for 12CO line integrated intensities to the SCUBA-2 850 {\mu}m and 450 {\mu}m bands. The conversion factors were then applied to HARP 12CO 3-2 maps of NGC 1333 in the Perseus complex and NGC 2071 and NGC 2024 in the Orion B molecular cloud complex to quantify the respective 12CO flux contribution to the 850 {\mu}m dust continuum emission. Sources with high molecular line contamination were analysed in further detail for... - Alex
Molecular line contamination in the SCUBA-2 450 {\mu}m and 850 {\mu}m continuum data. (arXiv:1204.6180v1 [astro-ph.GA])
29 April 2012, 7:56 pm
Brown astro-ph
Molecular line contamination in the SCUBA-2 450 {\mu}m and 850 {\mu}m continuum data. (arXiv:1204.6180v1 [astro-ph.GA]) - http://arxiv.org/abs/1204.6180
April 29
from astro-ph updates on arXiv.org
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Authors: E. Drabek, J. Hatchell, P. Friberg, J. Richer, S. Graves, J. V. Buckle, D. Nutter, D. Johnstone, J. Di Francesco Observations of the dust emission using millimetre/submillimetre bolometer arrays can be contaminated by molecular line flux, such as flux from 12CO. As the brightest molecular line in the submillimetre, it is important to quantify the contribution of CO flux to the dust continuum bands. Conversion factors were used to convert molecular line integrated intensities to flux detected by bolometer arrays in mJy per beam. These factors were calculated for 12CO line integrated intensities to the SCUBA-2 850 {\mu}m and 450 {\mu}m bands. The conversion factors were then applied to HARP 12CO 3-2 maps of NGC 1333 in the Perseus complex and NGC 2071 and NGC 2024 in the Orion B molecular cloud complex to quantify the respective 12CO flux contribution to the 850 {\mu}m dust continuum emission. Sources with high molecular line contamination were analysed in further detail for... - Alex
Millimeter-wave bolometer array receiver for the Atacama pathfinder experiment Sunyaev-Zel'dovich (APEX-SZ) instrument. (arXiv:1008.0342v2 [astro-ph.IM] UPDATED)
17 April 2012, 7:46 pm
Brown astro-ph
Millimeter-wave bolometer array receiver for the Atacama pathfinder experiment Sunyaev-Zel'dovich (APEX-SZ) instrument. (arXiv:1008.0342v2 [astro-ph.IM] UPDATED) - http://arxiv.org/abs/1008.0342
April 17
from astro-ph updates on arXiv.org
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Authors: Daniel Schwan, Peter A. R. Ade, Kaustuv Basu, Amy N. Bender, Frank Bertoldi, Hsaio-Mei Cho, Guyong. Chon, John Clarke, Matt Dobbs, Daniel Ferrusca, Rolfe Gusten, Nils W. Halverson, William L. Holzapfel, Cathy Horellou, Daniel Johansson, Bradley R. Johnson, James Kennedy, Zigmund Kermish, Ruediger Kneissl, Trevor Lanting, Adrian T. Lee, Martin Lueker, Jared Mehl, Karl M. Menten, Dirk Muders, Florian Pacaud, Thomas Plagge, Christian L. Reichardt, Paul L. Richards, Rienhold Schaaf, Peter Schilke, Martin W. Sommer, Helmuth Spieler, Carole Tucker, Axel Weiss, Benjamin Westbrook, Oliver Zahn The Atacama pathfinder experiment Sunyaev-Zel'dovich (APEX-SZ) instrument is a millimeter-wave cryogenic receiver designed to observe galaxy clusters via the Sunyaev-Zel'dovich effect from the 12 m APEX telescope on the Atacama plateau in Chile. The receiver contains a focal plane of 280 superconducting transition-edge sensor (TES) bolometers instrumented with a frequency-domain multiplexed... - Alex
Millimeter-wave bolometer array receiver for the Atacama pathfinder experiment Sunyaev-Zel'dovich (APEX-SZ) instrument. (arXiv:1008.0342v2 [astro-ph.IM] UPDATED)
17 April 2012, 7:46 pm
Brown astroph
Millimeter-wave bolometer array receiver for the Atacama pathfinder experiment Sunyaev-Zel'dovich (APEX-SZ) instrument. (arXiv:1008.0342v2 [astro-ph.IM] UPDATED) - http://arxiv.org/abs/1008.0342
April 17
from astro-ph updates on arXiv.org
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Authors: Daniel Schwan, Peter A. R. Ade, Kaustuv Basu, Amy N. Bender, Frank Bertoldi, Hsaio-Mei Cho, Guyong. Chon, John Clarke, Matt Dobbs, Daniel Ferrusca, Rolfe Gusten, Nils W. Halverson, William L. Holzapfel, Cathy Horellou, Daniel Johansson, Bradley R. Johnson, James Kennedy, Zigmund Kermish, Ruediger Kneissl, Trevor Lanting, Adrian T. Lee, Martin Lueker, Jared Mehl, Karl M. Menten, Dirk Muders, Florian Pacaud, Thomas Plagge, Christian L. Reichardt, Paul L. Richards, Rienhold Schaaf, Peter Schilke, Martin W. Sommer, Helmuth Spieler, Carole Tucker, Axel Weiss, Benjamin Westbrook, Oliver Zahn The Atacama pathfinder experiment Sunyaev-Zel'dovich (APEX-SZ) instrument is a millimeter-wave cryogenic receiver designed to observe galaxy clusters via the Sunyaev-Zel'dovich effect from the 12 m APEX telescope on the Atacama plateau in Chile. The receiver contains a focal plane of 280 superconducting transition-edge sensor (TES) bolometers instrumented with a frequency-domain multiplexed... - Alex
Terahertz hot electron bolometer waveguide mixers for GREAT. (arXiv:1204.2381v1 [astro-ph.IM])
11 April 2012, 8:04 pm
Brown astroph
Terahertz hot electron bolometer waveguide mixers for GREAT. (arXiv:1204.2381v1 [astro-ph.IM]) - http://arxiv.org/abs/1204.2381
April 11
from astro-ph updates on arXiv.org
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Authors: P. Pütz, C. E. Honingh, K. Jacobs, M. Justen, M. Schultz, J. Stutzki Supplementing the publications based on the first-light observations with the German Receiver for Astronomy at Terahertz frequencies (GREAT) on SOFIA, we present background information on the underlying heterodyne detector technology. We describe the superconducting hot electron bolometer (HEB) detectors that are used as frequency mixers in the L1 (1400 GHz), L2 (1900 GHz), and M (2500 GHz) channels of GREAT. Measured performance of the detectors is presented and background information on their operation in GREAT is given. Our mixer units are waveguide-based and couple to free-space radiation via a feedhorn antenna. The HEB mixers are designed, fabricated, characterized, and flight-qualified in-house. We are able to use the full intermediate frequency bandwidth of the mixers using silicon-germanium multi-octave cryogenic low-noise amplifiers with very low input return loss. Superconducting HEB mixers have... - Alex
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