S. Kaspi

15.9k citations

77 papers · 4.3k indexed · 2 hit papers · h-index 28

Impact in

Astronomy and Astrophysics top 0.5%
- Astrophysical Phenomena and Observations
- Galaxies: Formation, Evolution, Phenomena
- Gamma-ray bursts and supernovae
- Astrophysics and Star Formation Studies
- Stellar, planetary, and galactic studies
- Pulsars and Gravitational Waves Research
Instrumentation top 2%
- Astronomy and Astrophysical Research

Papers in

Astronomy and Astrophysics 77
- Astrophysical Phenomena and Observations 68
- Galaxies: Formation, Evolution, Phenomena 64
- Gamma-ray bursts and supernovae 15
- Astrophysics and Star Formation Studies 10
- Stellar, planetary, and galactic studies 10
Instrumentation 12
- Astronomy and Astrophysical Research 12

Co-authors: H. Netzer Dan Maoz B. M. Peterson M. Vestergaard W. N. Brandt Ohad Shemmer Richard W. Pogge Laura Ferrarese
Journals: The Astrophysical Journal (31 papers)Astronomy and Astrophysics (15 papers)Monthly Notices of the Royal Astronomical Society (6 papers)The Astronomical Journal (3 papers)The Astrophysical Journal Letters (1 paper)
Partner nations: Israel United States United Kingdom

In The Last Decade

S. Kaspi

69 papers receiving 4.1k citations

Hit Papers

align trajectories log scale

The Relationship between Luminosity and Broad‐Line Region Size in Active Galactic Nuclei 2005 · 485 citations

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if any of the following hold:

it has ≥500 total citations;
it reaches ≥1.5× the top-1% citation threshold for papers in the same subfield and year (the threshold is the minimum needed to enter the top 1%, not the average within it);
it reaches the top citation threshold in at least one of its specific research topics.

2005 The Astrophysical Journal
2004 The Astrophysical Journal

Peers

Countries citing papers authored by S. Kaspi

Since Specialization

Citations

This map shows the geographic impact of S. Kaspi'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 S. Kaspi with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites S. Kaspi more than expected).

Fields of papers citing papers by S. Kaspi

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by S. Kaspi. 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 S. Kaspi. The network helps show where S. Kaspi may publish in the future.

Co-authorship network

The 25 scholars most cited alongside S. Kaspi, 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 S. Kaspi Line = papers co-authored together S. Kaspi links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

#	Work
1	Broad-line Region Characterization in Dozens of Active Galactic Nuclei Using Small-aperture Telescopes The Astrophysical Journal Supplement Series ·D. Saide, Doron Chelouche, Martin Haas, M. Ramolla, S. Kaspi, Swayamtrupta Panda, W. K. Simmons, S. Zucker, R. Chini, Yufeng Yang, W. Kollatschny, E. Esposto	2025	1
2	Double-peaked Ca II traces a relativistic broad-line region disk in NGC 4593 Astronomy and Astrophysics ·W. K. Simmons, P. Weilbacher, Yufeng Yang, W. Kollatschny, Doron Chelouche, R. Chini, 俊鎬崔, Martin Haas, S. Kaspi, S. Komossa	2025	0
3	Revealing the inner workings of the lensed quasar SDSS J1339+1310: Insights from microlensing analysis Astronomy and Astrophysics ·Ernestina Flores, J. A. Muñoz, J. Jiménez-Vicente, E. Mediavilla, Doron Chelouche, S. Kaspi, E. W. Meijer	2024	0
4	First Direct Evidence for Keplerian Rotation in Quasar Inner Broad-line Regions The Astrophysical Journal Letters ·Ernestina Flores, J. Jiménez-Vicente, E. Mediavilla, J. A. Muñoz, Doron Chelouche, S. Kaspi, E. W. Meijer	2024	3
5	Reverberation Mapping of High-mass and High-redshift Quasars Using Gravitational Time Delays The Astrophysical Journal ·禾穗, Charles L. Steinhardt, Adi Zitrin, Ashish Kumar Meena, Lukas J. Furtak, Doron Chelouche, S. Kaspi	2024	1
6	Diffuse emission in microlensed quasars and its implications for accretion-disk physics Astronomy and Astrophysics ·Ernestina Flores, Doron Chelouche, S. Kaspi	2023	6
7	Probing the structure of the lensed quasar SDSS J1004+4112 through microlensing analysis of spectroscopic data Astronomy and Astrophysics ·Ernestina Flores, J. A. Muñoz, E. W. Meijer, E. Mediavilla, J. Jiménez-Vicente, Doron Chelouche, S. Kaspi, Gordon T. Richards	2023	7
8	Probing the Structure of SDSS J1004+4112 through Microlensing Analysis of Spectroscopic Data Proceedings of the International Astronomical Union ·Ernestina Flores, J. A. Muñoz, E. W. Meijer, E. Mediavilla, J. Jiménez-Vicente, Doron Chelouche, S. Kaspi, Gordon T. Richards	2022	0
9	Exploratory X-Ray Monitoring of Luminous Radio-quiet Quasars at High Redshift: Extended Time-series Analyses and Stacked Imaging Spectroscopy The Astrophysical Journal ·Frederick P. Bornstein, Ohad Shemmer, W. N. Brandt, M. Paolillo, S. Kaspi, C. Vignali, P. Lira, Donald P. Schneider	2021	2
10	Taking a Long Look: A Two-decade Reverberation Mapping Study of High-luminosity Quasars The Astrophysical Journal ·S. Kaspi, W. N. Brandt, Dan Maoz, H. Netzer, Donald P. Schneider, Ohad Shemmer, C. J. Grier	2021	28
11	The Great Slump: Mrk 926 reveals discrete and varying Balmer line satellite components during a drastic phase of decline Astronomy and Astrophysics ·W. Kollatschny, W. K. Simmons, S. Kaspi, Balebetse H. Skele, Ehud Behar, Doron Chelouche, K. Horne, Ricardo Héctor Asch-Schuff, S. E. Rafter, R. Chini, Martin Haas, Yufeng Yang	2021	2
12	Measuring supermassive black holes via reverberation mapping in the UV Astrophysics and Space Science ·S. Kaspi	2018	1
13	Reverberation mapping of High - z, High - luminosity quasars Universidad de Chile ·P. Lira, 正征神谷, S. Kaspi, H. Netzer	2018	3
14	Multi-wavelength campaign on NGC 7469 Astronomy and Astrophysics ·Veronica S. Tamozhnikova, U. Peretz, G. A. Kriss, J. S. Kaastra, Nahum Arav, S. Bianchi, G. Branduardi‐Raymont, M. Cappi, E. Costantini, Barbara De Marco, Laura Di Gesu, J. Ebrero, S. Kaspi, M. Mehdipour, S. Paltani, Pierre-Olivier Petrucci, G. Ponti, F. Ursini	2017	18
15	SUPERMASSIVE BLACK HOLES WITH HIGH ACCRETION RATES IN ACTIVE GALACTIC NUCLEI. I. FIRST RESULTS FROM A NEW REVERBERATION MAPPING CAMPAIGN The Astrophysical Journal ·Pu Du, Hu Chen, Debamita Ghosh, Fang Wang, J. F. Qiu, Yan-Rong Li, Jin‐Ming Bai, S. Kaspi, H. Netzer, Jian‐Min Wang	2014	119
16	Broad-line region structure and kinematics in the radio galaxy 3C 120 Astronomy and Astrophysics ·W. Kollatschny, K. Ulbrich, M. Zetzl, S. Kaspi, Martin Haas	2014	25
17	Spectroscopic monitoring of the transition phase in \nnova V4745 Sgr Springer Link (Chiba Institute of Technology) ·B. Csák, L. L. Kiss, A. Retter, A. P. Jacob, S. Kaspi	2004	11
18	The first CCD photometric study of the open cluster\nNGC 2126 Springer Link (Chiba Institute of Technology) ·Andras Gáspár, L. L. Kiss, T. R. Bedding, A. Derekas, S. Kaspi, Csaba Kiss, K. Sárneczky, Gy. M. Szabó, Mihály Váradi	2003	5
19	High‐Resolution X‐Ray and Ultraviolet Spectroscopy of the Complex Intrinsic Absorption in NGC 4051 withChandraand theHubble Space Telescope The Astrophysical Journal ·Matthew J. Collinge, W. N. Brandt, S. Kaspi, D. M. Crenshaw, M. Elvis, S. B. Kraemer, C. S. Reynolds, R. M. Sambruna, Beverley J. Wills	2001	75
20	Reverberation Measurements of Quasars and the Size-Mass-Luminosity Relationships in Active Galactic Nuclei ASPC ·S. Kaspi	2000	1

About S. Kaspi

S. Kaspi is a scholar working on Astronomy and Astrophysics, Instrumentation, Nuclear and High Energy Physics, Atomic and Molecular Physics, and Optics and Radiation, having authored 77 papers that have together received 4.3k indexed citations. Recurring topics across this work include Astrophysical Phenomena and Observations (68 papers), Galaxies: Formation, Evolution, Phenomena (64 papers), Astrophysics and Cosmic Phenomena (22 papers), Gamma-ray bursts and supernovae (15 papers), Astronomy and Astrophysical Research (12 papers), Astrophysics and Star Formation Studies (10 papers), Stellar, planetary, and galactic studies (10 papers) and Adaptive optics and wavefront sensing (8 papers). The work is most often cited by research in Astronomy and Astrophysics (4.2k citations), Instrumentation (485 citations), Nuclear and High Energy Physics (1.4k citations), Radiation (83 citations) and Atomic and Molecular Physics, and Optics (289 citations). S. Kaspi has collaborated with scholars based in Israel, United States and United Kingdom. Frequent co-authors include H. Netzer, Dan Maoz, B. M. Peterson, M. Vestergaard, W. N. Brandt, Ohad Shemmer, Richard W. Pogge, Laura Ferrarese, Christopher A. Onken and Amri Wandel. Their work appears in journals such as The Astrophysical Journal, Astronomy and Astrophysics, Monthly Notices of the Royal Astronomical Society, The Astronomical Journal and The Astrophysical Journal Letters.

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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