NuSTAR on-ground calibration II: Effective area

Brejnholt, Nicolai ; Christensen, Finn Erland ; Westergaard, Niels Jørgen Stenfeldt ; Hailey, Charles J. ; Koglin, Jason E. ; Craig, William W.

part of: Proceedings of SPIE, 2012, SPIE - International Society for Optical Engineering,

Type: Article in proceedings - Article in proceedings

Presented at: SPIE Astronomical Telescopes + Instrumentation 2012, Amsterdam

ATHENA optimized coating design

Ferreira, Desiree Della Monica ; Christensen, Finn Erland ; Jakobsen, Anders Clemen ; Westergaard, Niels Jørgen Stenfeldt ; Shortt, Brian

in journal: Proceedings of SPIE, the International Society for Optical Engineering (ISSN: 0277-786X) (DOI: http://dx.doi.org/10.1117/12.925694), vol: 8443, pages: 84435L, 2012

Type: Conference article - Conference article

Presented at: Space Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray, Amsterdam

DOI: 10.1117/12.925694

NuSTAR on-ground calibration I: Imaging quality

Westergaard, Niels Jørgen Stenfeldt ; Madsen, Kristin K. ; Brejnholt, Nicolai ; Koglin, Jason E. ; Christensen, Finn Erland ; Pivovaroff, Michael J. ; Vogel, Julia K.

part of: Proceedings of SPIE, pages: 84431X, 2012, SPIE - International Society for Optical Engineering,

Type: Article in proceedings - Article in proceedings

Presented at: SPIE Astronomical Telescopes + Instrumentation 2012, Amsterdam

DOI: 10.1117/12.927076

Coatings for the NuSTAR mission

Christensen, Finn Erland ; Jakobsen, Anders Clemen ; Brejnholt, Nicolai ; Madsen, Kristin K. ; Hornstrup, Allan ; Westergaard, Niels Jørgen Stenfeldt ; Momberg, Joan ; Koglin, Jason ; Fabricant, Anne M. ; Stern, Marcela ; Craig, William W. ; Pivovaroff, Michael J. ; Windt, David

in journal: Proceedings of SPIE--the international society for optical engineering (ISSN: 0277-786X) (DOI: http://dx.doi.org/10.1117/12.894615), vol: 8147, issue: 1, pages: 81470U-19, 2011

Type: Conference article - Conference article

Presented at: Optics for EUV, X-Ray, and Gamma-Ray Astronomy V, San Diego, California, USA

DOI: 10.1117/12.894615

MT_RAYOR: a versatile raytracing tool for x-ray telescopes

Westergaard, Niels Jørgen Stenfeldt

in journal: Proceedings of SPIE--the international society for optical engineering (ISSN: 0277-786X) (DOI: http://dx.doi.org/10.1117/12.895310), vol: 8147, issue: 1, pages: 81470Y-6, 2011

Type: Conference article - Conference article

Presented at: Optics for EUV, X-Ray, and Gamma-Ray Astronomy V

DOI: 10.1117/12.895310

INTEGRAL/JEM-X sees Markarian 817

Chenevez, Jérôme ; Lund, Niels ; Westergaard, Niels Jørgen Stenfeldt ; Budtz-Jørgensen, Carl ; Brandt, Søren ; Oxborrow, Carol Anne ; Iversen, Niels Elkjær ; Rodriguez, J.

in journal: The Astronomer's Telegram, pages: ATel #3817, 2011

Type: Journal article - Journal article

ESAC Faculty Seminars

Westergaard, Niels Jørgen Stenfeldt

Type: Paper - Paper

Presented at: Science and source catalogs with JEM-X, Villafranca

Improved JEM-X imaging

Lund, Niels ; Westergaard, Niels Jørgen Stenfeldt ; Chenevez, Jérôme ; Brandt, Søren

in journal: P o S - Proceedings of Science (ISSN: 1824-8039), 2010

Type: Journal article - Journal article

Presented at: 8th INTEGRAL Workshop, Dublin

JEM-X: six years in space

Budtz-Jørgensen, Carl ; Lund, Niels ; Westergaard, Niels Jørgen Stenfeldt ; Brandt, Søren ; Chenevez, Jérôme ; Oxborrow, Carol Anne ; Rasmussen, Ib Lundgaard

in journal: P o S - Proceedings of Science (ISSN: 1824-8039), pages: 141, 2009

Type: Journal article - Journal article

A JEM-X Catalog of X-ray Sources

Westergaard, Niels Jørgen Stenfeldt

part of: Proceedings of Science, 2010,

Type: Article in proceedings - Article in proceedings

Presented at: The Extreme sky: Sampling the Universe above 10 keV, Otranto (Lecce) Italy

SAX J2103.5+4545 in outburst

Galis, R. ; Beckmann, V. ; Bianchin, V. ; Grebenev, S. ; McBreen, B. ; Mereghetti, S. ; Revnivtsev, M. ; Sanchez, C. ; Strong, A. ; Westergaard, Niels Jørgen Stenfeldt

in journal: The Astronomer's Telegram, pages: 1063, 2008

Type: Journal article - Journal article

A JEM-X catalog of X-ray sources

Westergaard, Niels Jørgen Stenfeldt ; Chenevez, Jerome ; Lund, Niels ; Budtz-Jørgensen, Carl ; Brandt, Søren

part of: 6TH INTEGRAL WORKSHOP: THE OBSCURED UNIVERSE, pages: 275-278, 2007, ESA PUBLICATIONS DIVISION C/O ESTEC,

Type: Article in proceedings - Article in proceedings

Presented at: 6TH INTEGRAL WORKSHOP: THE OBSCURED UNIVERSE

INTEGRAL observations of the cosmic X-ray background in the 5-100 keV range via occultation by the Earth

Churazov, E. ; Sunyaev, R. ; Revnivtsev, M. ; Sazonov, S. ; Molkov, S. ; Grebenev, S. ; Winkler, C. ; Parmar, A. ; Bazzano, A. ; Falanga, M. ; Gros, A. ; Lebrun, F. ; Natalucci, L. ; Ubertini, P. ; Roques, J.P. ; Bouchet, L. ; Jourdain, E. ; Knodlseder, J. ; Diehl, R. ; Budtz-Jørgensen, Carl ; Brandt, Søren ; Lund, Niels ; Westergaard, Niels Jørgen Stenfeldt ; Neronov, A. ; Turler, M. ; Chernyakova, M. ; Walter, R. ; Produit, N. ; Mowlavi, N. ; Mas-Hesse, J.M. ; Domingo, A. ; Gehrels, N. ; Kuulkers, E. ; Kretschmar, P. ; Schmidt, M.

in journal: Astronomy & Astrophysics (ISSN: 0004-6361) (DOI: http://dx.doi.org/10.1051/0004-6361:20066230), vol: 467, issue: 2, pages: 529-540, 2007

Type: Journal article - Journal article

DOI: 10.1051/0004-6361:20066230

JEM-X catalog of X-ray sources

Westergaard, Niels Jørgen Stenfeldt ; Chenevez, Jérôme ; Lund, Niels ; Budtz-Jørgensen, Carl ; Brandt, Søren

part of: Proceedings of the 6th INTEGRAL Workshop, 2006,

Type: Article in proceedings - Article in proceedings

Presented at: the 6th INTEGRAL Workshop, Moscow

JEM-X: three years in space

Budtz-Jørgensen, Carl ; Lund, Niels ; Westergaard, Niels Jørgen Stenfeldt ; Brandt, Søren ; Oxborrow, Carol Anne ; Chenevez, Jérôme ; Rasmussen, Ib Lundgaard ; Laursen, Steen ; Pedersen, Søren Møller ; Polny, Josef ; Kretschmar, P. ; Vilhu, O. ; Feroci, M. ; Frontera, F. ; Juchnikowski, G. ; Reglero, V. ; Martínez-Núnez, S. ; Larsson, S. ; Zdziarski, A. ; Fahmy, S.

part of: Space Telescopes and Instrumentation II: Ultraviolet to Gamma Ray, 2006,

Type: Article in proceedings - Article in proceedings

Presented at: SPIE

X-ray bursts observed with JEM-X

Brandt, Søren ; Chenevez, Jérôme ; Lund, Niels ; Budtz-Jørgensen, Carl ; Westergaard, Niels Jørgen Stenfeldt

part of: ESA SP-622, pages: 441-443, 2006, ESA PUBLICATIONS DIVISION C/O ESTEC,

Type: Article in proceedings - Article in proceedings

Presented at: The 6th INTEGRAL Workshop : THE OBSCURED UNIVERSE, Moscow, Russia

Instrument Specific Software for JEM-X Architectural Design Document

Oxborrow, Carol Anne ; Chenevez, Jérôme ; Kretschmar, Peter ; Larsson, Stefan ; Maisala, Sami ; Westergaard, Niels Jørgen Stenfeldt

Type: Report - Report

INTEGRAL detection of SWIFT J2037.2+4151

Westergaard, Niels Jørgen Stenfeldt ; Budtz-Jørgensen, Carl ; Chenevez, Jérôme ; Lund, Niels ; Brandt, Søren ; Oxborrow, Carol Anne

in journal: The Astronomer´s Telegram : ATel, pages: ATel #967, 2006

Type: Journal article - Journal article

Fast X-ray transient, IGR J17464-2811 detected with INTEGRAL

Brandt, Søren ; Budtz-Jørgensen, Carl ; Chenevez, Jérôme ; Lund, Niels ; Oxborrow, Carol Anne ; Westergaard, Niels Jørgen Stenfeldt

in journal: The Astronomer´s Telegram : ATel, pages: ATel #970, 2006

Type: Journal article - Journal article

Characterizing a new class of variability in GRS 1915+105 with simultaneous INTEGRAL/RXTE observations

Hannikainen, D.C. ; Rodriguez, J. ; Vilhu, O. ; Hjalmarsdotter, L. ; Zdziarski, A.A. ; Belloni, T. ; Poutanen, J. ; Wu, K. ; Shaw, S.E. ; Beckmann, V. ; Hunstead, R.W. ; Pooley, G.G. ; Westergaard, Niels Jørgen Stenfeldt ; Mirabel, I.F. ; Hakala, P. ; Castro-Tirado, A. ; Durouchoux, P.

in journal: Astronomy & Astrophysics (ISSN: 0004-6361), vol: 435, issue: 3, pages: 995-1004, 2005

Type: Journal article - Journal article