A. Orr

845 citations

37 papers · 452 indexed · h-index 13

Impact in

Astronomy and Astrophysics top 5%
- Astrophysical Phenomena and Observations
- Pulsars and Gravitational Waves Research
- Galaxies: Formation, Evolution, Phenomena
- Gamma-ray bursts and supernovae
- Stellar, planetary, and galactic studies
- Astro and Planetary Science
Nuclear and High Energy Physics top 10%
- Astrophysics and Cosmic Phenomena

Papers in ⓘ

Astronomy and Astrophysics 34
- Astrophysical Phenomena and Observations 25
- Pulsars and Gravitational Waves Research 12
- Gamma-ray bursts and supernovae 11
- Galaxies: Formation, Evolution, Phenomena 5
- Astro and Planetary Science 4
- Stellar, planetary, and galactic studies 3
Nuclear and High Energy Physics 15
- Astrophysics and Cosmic Phenomena 14

Co-authors: A. N. Parmar (18 shared papers)T. Oosterbroek (15 shared papers)P. Gondoin (4 shared papers)D. Lumb (4 shared papers)J. M. Torrejón (2 shared papers)P. Barr (6 shared papers)E. Kuulkers (8 shared papers)M. Guainazzi (10 shared papers)
Journals: Astronomy and Astrophysics (11 papers)Earth Moon and Planets (1 paper)The Astrophysical Journal (1 paper)Advances in Space Research (1 paper)Monthly Notices of the Royal Astronomical Society (1 paper)
Partner nations: Netherlands Italy Spain

In The Last Decade

A. Orr

34 papers receiving 437 citations

Peers

Countries citing papers authored by A. Orr

Since Specialization

Citations

This map shows the geographic impact of A. Orr's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by A. Orr with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites A. Orr more than expected).

Fields of papers citing papers by A. Orr

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by A. Orr. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by A. Orr. The network helps show where A. Orr may publish in the future.

Co-authors

The 25 scholars most cited alongside A. Orr, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with A. Orr Line = papers co-authored together A. Orr links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

Showing the 20 most-cited of 37 papers — load more, or switch the sort, to bring in the rest.

#	Work
1	A swan song: the disappearance of the nucleus of NGC 4051 and the echo of its past glory Monthly Notices of the Royal Astronomical Society ·M. Guainazzi, F. Nicastro, F. Fiore, G. Matt, I. M. McHardy, A. Orr, P. Barr, A. Fruscione, I. E. Papadakis, A. N. Parmar, P. Uttley, G. C. Perola, L. Piro	1998	58
2	The INTEGRAL Galactic bulge monitoring program: the first 1.5 years Astronomy and Astrophysics ·E. Kuulkers, S. E. Shaw, A. Paizis, J. Chenevez, S. Brandt, T. J.-L. Courvoisier, A. Domingo, Ken Ebisawa, P. Kretschmar, C. B. Markwardt, N. Mowlavï, T. Oosterbroek, A. Orr, D. Rísquez, C. Sánchez‐Fernández, R. Wijnands	2007	41
3	Evidence for Dust-related X-Ray Emission from Comet C/1995 O1 (Hale-Bopp) The Astrophysical Journal ·Alan Owens, A. N. Parmar, T. Oosterbroek, A. Orr, L. A. Antonelli, F. Fiore, R. Schulz, G. P. Tozzi, M. C. Maccarone, L. Piro	1998	40
4	Evidence for a Neutron Star in the non-pulsating massive X-ray binary 4U2206+54 Astronomy and Astrophysics ·J. M. Torrejón, I. Kreykenbohm, A. Orr, L. Titarchuk, I. Negueruela	2004	38
5	$\vec{XMM}$–$\vec{Newton}$ observations of the Seyfert 1 galaxy Mrk 335 Astronomy and Astrophysics ·P. Gondoin, A. Orr, D. Lumb, M. Santos‐Lleó	2002	33
6	Interacting Binaries: Saas-Fee Advanced Course 22. Lecture Notes 1992. Swiss Society for Astrophysics and Astronomy Medical Entomology and Zoology ·S. N. Shore, Mario Livio, E. P. J. van den Heuvel, H. Nussbaumer, A. Orr, Schweizerische Gesellschaft für Astrophysik und Astronomie	1993	33
7	Simultaneous XMM-Newton and BeppoSAX observation of the Seyfert I galaxy IC 4329A Astronomy and Astrophysics ·P. Gondoin, P. Barr, D. Lumb, T. Oosterbroek, A. Orr, A. N. Parmar	2001	31
8	XMM-Newton observations of the INTEGRAL X-ray transient IGR J17544-2619 Astronomy and Astrophysics ·R. González‐Riestra, T. Oosterbroek, E. Kuulkers, A. Orr, A. N. Parmar	2004	31
9	${XMM{-}Newton}$ observations of the Seyfert 1 galaxy NGC 3227 Astronomy and Astrophysics ·P. Gondoin, A. Orr, D. Lumb, H. I. Siddiqui	2003	25
10	INTEGRAL observations of the black hole candidate H 1743-322 in outburst Astronomy and Astrophysics ·A. N. Parmar, E. Kuulkers, T. Oosterbroek, P. Barr, R. Much, A. Orr, O. R. Williams, Christoph Winkler	2003	23
11	BeppoSAX survey of Be/X-ray binary candidates Astronomy and Astrophysics ·J. M. Torrejón, A. Orr	2001	22
12	ESA’s Drop Tower Utilisation Activities 2000 to 2011 Microgravity Science and Technology ·E. Kufner, Jürgen Blum, N. Callens, Christian Eigenbrod, Otto Koudelka, A. Orr, Carla C. Rosa, Andrei Vedernikov, Stefan Will, J. Reimann, Gerhard Wurm	2011	14
13	BeppoSAX Low-Energy Concentrator Spectrometer background subtraction techniques Astronomy and Astrophysics Supplement Series ·A. N. Parmar, T. Oosterbroek, A. Orr, M. Guainazzi, N. Shane, M. J. Freyberg, D. Ricci, A. Malizia	1999	12
14	BeppoSAX spectroscopy of MR 2251-178: A test for ionized reflection in radio quiet QSOs Astronomy and Astrophysics ·A. Orr, P. Barr, M. Guainazzi, A. N. Parmar, A. J. Young	2001	11
15	Non-thermal emission from AGN coronae Astronomy and Astrophysics ·G. Torricelli‐Ciamponi, P. Pietrini, A. Orr	2005	6
16	XMM-Newtonobservations of the dwarf elliptical galaxy NGC 3226 Astronomy and Astrophysics ·P. Gondoin, A. Orr, H. I. Siddiqui	2004	5
17	New INTEGRAL source, IGR J17354-3255, and continuation of the INTEGRAL Galactic Bulge monitoring program The astronomer's telegram ·E. Kuulkers, S. E. Shaw, A. Paizis, A. Gros, J. Chenevez, C. Sánchez‐Fernández, S. Brandt, T. J.-L. Courvoisier, A. Domingo, Ken Ebisawa, P. Kretschmar, C. B. Markwardt, N. Mowlavï, T. Oosterbroek, A. Orr, D. Rísquez Oneca, R. Wijnands	2006	4
18	Detection Of Soft X-Ray Emission From Comet C/1995 O1 (Hale–Bopp) Earth Moon and Planets ·Alan Owens, T. Oosterbroek, A. Orr, A. N. Parmar, R. Schulz, G. P. Tozzi	1997	3
19	INTEGRAL Mission Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE ·A. N. Parmar, Christoph Winkler, P. Barr, L. Hansson, E. Kuulkers, Rudolph Much, A. Orr	2003	3
20	1 BeppoSAX observations of low-energy spectral features in AGN A. Orr, A. N. Parmar, T. Yaqoob, M. Guainazzi	1997	2

About A. Orr

A. Orr is a scholar working on Astronomy and Astrophysics, Nuclear and High Energy Physics, Instrumentation, Radiation and Computational Mechanics, having authored 37 papers that have together received 452 indexed citations. Recurring topics across this work include Astrophysical Phenomena and Observations (25 papers), Astrophysics and Cosmic Phenomena (14 papers), Pulsars and Gravitational Waves Research (12 papers), Gamma-ray bursts and supernovae (11 papers), Astronomical Observations and Instrumentation (7 papers), Galaxies: Formation, Evolution, Phenomena (5 papers), Astro and Planetary Science (4 papers) and Stellar, planetary, and galactic studies (3 papers). The work is most often cited by research in Astronomy and Astrophysics (436 citations), Nuclear and High Energy Physics (136 citations), Radiation (32 citations), Geophysics (40 citations) and Instrumentation (7 citations). A. Orr has collaborated with scholars based in Netherlands, Italy and Spain. Frequent co-authors include A. N. Parmar, T. Oosterbroek, P. Gondoin, D. Lumb, J. M. Torrejón, P. Barr, E. Kuulkers, M. Guainazzi, F. Fiore and L. Piro. Their work appears in journals such as Astronomy and Astrophysics, Earth Moon and Planets, The Astrophysical Journal, Advances in Space Research and Monthly Notices of the Royal Astronomical Society.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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