About

Log in?

DTU users get better search results including licensed content and discounts on order fees.

Anyone can log in and get personalized features such as favorites, tags and feeds.

Log in as DTU user Log in as non-DTU user No thanks

DTU Findit

Recent

Boolean: (bicycle AND helmet) OR (head AND protection) (always group AND in parenthesis)
Title: title:(climate change)
Author: author:("bohr niels" OR "bohr n") (avoid only full first name)
Phrase: "water pump control" (does not work with wildcards)
Wildcards: wom?n pharm*

More help on how to search

Flexible matching

About search syntax

Search syntax Advanced
Close advanced
{{problem}}
By field Using AND/OR By author
This tool can help you build boolean queries suitable for doing a broad search for different synonyms or spellings of each word. Start via the drop-down below or just start typing in the search field.
{{ row.typeTitle }}: ( )

Since our index often lack the full first name of people it can be difficult to correctly search by author.

Fill in the fields and let us help you build a good query:

If you need to find everything possible, consider only searching by last name.

Use "Starting year" to ignore publications out of year range.

Author: Christensen remove
Filter results...

Interpreted as:

title:(The AND high AND energy AND focusing AND telescope)

Suggestions: Include records that partially match the query

Filter results
Access
Type
Language
Year
From DTU
Advanced
Previous 1 - 10 of 10 Next
Export
10 items by relevance
1 Preprint article · Conference paper

Development of the high energy focusing telescope (HEFT) balloon experiment

Harrison, F.A.; Bolotnikov, A.; Boggs, S.E.; Christensen, Finn Erland; Cook, W.R.; Craig, W.W.; et al. (5 more)

Proceedings of the Spie Meeting — 2000, pp. 693-699

The High Energy Focusing Telescope (HEFT) is a balloon-borne experiment employing focusing optics in the hard X-ray/soft gamma-ray band (20 - 100 keV) for sensitive observations of astrophysical sources. The primary scientific objectives include imaging and spectroscopy of ^(44)Ti emission in young

Year: 2000

Language: English

More...
h lmkepofgcdb jina
2 Preprint article

Development of the High-Energy Focusing Telescope (HEFT) balloon experiment

Trümper, Joachim E.; Aschenbach, Bernd; Harrison, F. A.; Boggs, S. E.; Bolotnikov, A.; Christensen, F. E.; et al. (7 more)

The High Energy Focusing Telescope (HEFT) is a balloon-borne experiment employing focusing optics in the hard X-ray/soft gamma-ray band (20 - 100 keV) for sensitive observations of astrophysical sources. The primary scientific objectives include imaging and spectroscopy of ^(44)Ti emission in young

Year: 2000

Language: English

More...
naci d lem ofhpjbkg
3 Preprint article

Ground performance of the High-Energy Focusing Telescope (HEFT) attitude control system

Flanagan, Kathryn A.; Siegmund, Oswald H. W.; Gunderson, Kurt; Chen, C. M. Hubert; Christensen, Finn; Craig, William; et al. (6 more)

The High Energy Focusing Telescope (HEFT) is a balloon-borne, hard x-ray/gamma ray (20-70 keV) astronomical experiment. HEFT's 10 arcminute field of view and 1 arcminute angular resolution place challenging demands on its attitude control system (ACS). A microprocessor-based ACS has been developed to manage target acquisition and sidereal tracking. The ACS consists of a variety of sensors and actuators, with provisions for 2-way ground communication, all controlled by an on-board computer. Ground based pointing performance measurements indicate 1σ jitter of 7" and gyro drift rates of <1"...

Year: 2004

Language: English

More...
le n fo ghkicbmpdja
4 Conference paper · Preprint article

Ground performance of the High-Energy Focusing Telescope (HEFT) attitude control system

Gunderson, K.S.; Christensen, Finn Erland; Craig, W.W.; Decker, T.R.; Hailey, C.J.; Harrison, F.A.; et al. (3 more)

X-ray and Gamma-ray Instrumentation for Astronomy Xiii — 2004

The High Energy Focusing Telescope (HEFT) is a balloon-borne, hard x-ray/gamma ray (20-70 keV) astronomical experiment. HEFT's 10 arcminute field of view and 1 arcminute angular resolution place challenging demands on its attitude control system (ACS). A microprocessor-based ACS has been developed

Year: 2004

Language: English

More...
hb p foidg kajcmnle
5 Preprint article · Conference paper

Investigation of Substrates and Mounting Techniques for the High Energy Focusing Telescope (HEFT)

Hailey, Charles J.; Abdali, Salim; Christensen, Finn Erland; Craig, William W.; Decker, Todd R.; Harrison, Fiona A.; et al. (1 more)

Proceedings of Spie - the International Society for Optical Engineering — 1997, Volume 3114, pp. 535-543

The High Energy Focusing Telescope (HEFT) is a balloon-borne system for obtaining arcminute imagery in the 20-100 keV energy band. The hard X-ray optics are baselined to use thin epoxy-replicated aluminum foil substrates coated with graded-d multilayers, and we show some results on X-ray

Year: 1997

Language: English

More...
lojncmefk abdpih g
6 Preprint article

Investigation of substrates and mounting techniques for the High Energy Focusing Telescope (HEFT)

Siegmund, Oswald H. W.; Gummin, Mark A.; Hailey, Charles J.; Abdali, Salim; Christensen, Finn E.; Craig, William W.; et al. (3 more)

The high energy focusing telescope (HEFT) is a balloon-borne system for obtaining arcminute imagery in the 20 - 100 keV energy band. The hard x-ray optics are baselined to use thin epoxy-replicated aluminum foil substrates coated with graded-d multilayers, and we show some results on x-ray

Year: 1997

Language: English

More...
bdciofhkajlpme ng
7 Report

The high energy focusing telescope: A balloon borne hard X-ray / soft gamma-ray experiment

Christensen, Finn Erland

Year: 1999

Language: English

More...
nlcmfpei jhkb gdao
8 Conference paper

Optimization of multilayer coatings for future high-energy focusing telescopes

Gellert, N. C.; Massahi, S.; Ferreira, D. D. M.; Christensen, F. E.; Svendsen, S.; 'S Jegers, A.; et al. (1 more)

Proceedings of Spie — 2022, Volume 12181, pp. 121814K-121814K-10

Nanometer-thin multilayer coatings can enable high performance of focusing X-ray telescopes to energies up to 200 keV and beyond. In this paper we discuss the multilayer parameters and their limitations necessary for the reflection of hard X-ray photons. We present several multilayer coating

Year: 2022

Language: English

More...
m phgkfln eoicdbja
9 Journal article · Preprint article

Calibration of the Nustar High-Energy Focusing X-Ray Telescope

Madsen, Kristin K.; Harrison, Fiona A.; Markwardt, Craig B.; An, Hongjun; Grefenstette, Brian W.; Bachetti, Matteo; et al. (16 more)

Astrophysical Journal Supplement Series — 2015, Volume 220, Issue 1, pp. 8

We present the calibration of the Nuclear Spectroscopic Telescope Array (NuSTAR) X-ray satellite. We used the Crab as the primary effective area calibrator and constructed a piece-wise linear spline function to modify the vignetting response. The achieved residuals for all off-axis angles

Year: 2015

Language: English

More...
nakldgpb e jc ofihm
10 Preprint article

Calibration of the NuSTAR High-energy Focusing X-ray Telescope

Madsen, Kristin K.; Harrison, Fiona A.; Markwardt, Craig B.; An, Hongjun; Grefenstette, Brian W.; Bachetti, Matteo; et al. (16 more)

We present the calibration of the Nuclear Spectroscopic Telescope Array (NuSTAR) X-ray satellite. We used the Crab as the primary effective area calibrator and constructed a piece-wise linear spline function to modify the vignetting response. The achieved residuals for all off-axis angles

Year: 2015

Language: Undetermined

More...
lbfogmi edknac j hp

DTU users get better search results including licensed content and discounts on order fees.

Log in as DTU user