Selected Peer-Reviewed — Main Author
1
H. Ashkar (H.E.S.S. collaboration, 2025). H.E.S.S. programme searching for VHE gamma rays associated with FRBs
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2
M. Seglar-Arroyo, H. Ashkar, et al (2024). Cross-Observatory Coordination with tilepy: A Novel Tool for Observations of Multi-Messenger Transient Events, ApJS, 274, 1
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3
H. Ashkar, et al. (2024). The case of the missing VHE GRB: A retrospective study of Swift gamma-ray bursts with Imaging Atmospheric Cherenkov Telescopes, ApJ, 964, 57
Link
4
H. Ashkar (H.E.S.S. collaboration, 2023). H.E.S.S. follow-up observations of GRB 221009A, ApJL, 946, L27
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5
H. Ashkar (H.E.S.S. collaboration, 2021). H.E.S.S. follow-up of Binary Black Hole Coalescence events during the second and third Gravitational Waves observing runs of Advanced LIGO and Virgo, ApJ, 923, 109
Link
6
H. Ashkar (H.E.S.S. collaboration, 2021). Searching for TeV gamma-ray emission from SGR1935+2153 during its 2020 X-ray and radio bursting phase, ApJ, 919, 106
Link
7
H. Ashkar, et al. (2021). The H.E.S.S. Gravitational Wave Rapid Follow-up Program, JCAP, JCAP03(2021), 45
Link
8
H. Ashkar (H.E.S.S. collaboration, 2019). Probing the magnetic field in the GW170817 outflow using H.E.S.S. observations, ApJL, 894, L16
Link
More Selected Peer-Reviewed Publications
9
H.E.S.S. collaboration (2019), A very-high-energy component deep in the γ-ray burst afterglow, Nature, 575, 464
Link
Contribution: Review of the H.E.S.S. main results and interpretation.
10
H.E.S.S. collaboration et al. (2021), Revealing X-ray and gamma-ray temporal and spectral similarities in the GRB190829A afterglow, Science, 372, 1081
Link
Contribution: Participation in the MWL analysis and interpretation, mentioned in the acknowledgments.
11
J. O. Chibueze, et al. (2022), A MeerKAT, e-MERLIN, H.E.S.S. and Swift search for persistent and transient emission associated with three localized FRBs, Monthly Notices of the Royal Astronomical Society, 515, 1365
Link
Contribution: Main H.E.S.S. author responsible for the H.E.S.S. VHE gamma-ray and Swift X-ray and UV analysis and interpretation.
12
C. Hoischen, et al. (2022), The H.E.S.S. transient follow-up system, Astronomy & Astrophysics, 666, A119
Link
Contribution: Implementation of the follow-up of poorly localized transients and FRBs in the H.E.S.S. Target of Opportunity alert system.
13
P. Reichherzer, et al. (2021), Astro-COLIBRI — The COincidence LIBrary for Real-time Inquiry for Multimessenger Astrophysics, The Astrophysical Journal Supplement Series, 256, 5
Link
Contribution: Implementing the handling of poorly localized transients and contribution to the visibility plot module.
14
F. Durret, et al. (2019), The link between brightest cluster galaxy properties and large-scale extensions of 38 DAFT/FADA and CLASH clusters in the redshift range 0.2 < z < 0.9, Astronomy & Astrophysics, 622, A78
Link
Contribution: Creation of the density maps of the CLASH galaxy clusters.
Selected Proceedings — Main Author
15
H. Ashkar, et al. (2025). tilepy: Smart Scheduling for Multi-Messenger Astronomy from Earth to Orbit. ICRC2025 proceedings, Proceedings of Science, ICRC2025, 1452
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16
H. Ashkar, et al. (2023). Revisiting Two Decades of GRB Observations: Assessing Missed Very High-Energy Detections and Future Prospects. ICRC2025 proceedings, Proceedings of Science, ICRC2025, 1452
Link
17
H. Ashkar, et al. (2023). Probing VHE gamma-ray emission from GW events with H.E.S.S., ICRC2023 proceedings, Proceedings of Science, ICRC2023, 1452
Link
18
H. Ashkar, et al. (2023). All-sky archival search for FRB high-energy counterparts with Swift and Fermi, ICRC2023 proceedings, Proceedings of Science, ICRC2023, 555
Link
19
H. Ashkar, et al. (2022). Gravitational Waves follow-up in the very high energy domain with the High Energy Stereoscopic System, Proceedings of the 56th Rencontres de Moriond 2022 (VHEPU), 181
Link
20
H. Ashkar, et al. (2021). H.E.S.S. follow-up of BBH merger events, Proceedings of Science, 395, 943
Link
21
H. Ashkar, et al. (2021). The H.E.S.S. Gravitational Wave Rapid Follow-up Program during O2 and O3, Proceedings of Science, 395, 936
Link
22
H. Ashkar, F. Schüssler, M. Seglar-Arroyo (2019). Searches for TeV gamma-ray counterparts to gravitational wave events with H.E.S.S., Mem. R. Astron. Soc., 90, 49
Link
23
H. Ashkar, The hunt for VHE gamma rays in the Gravitational Waves era, JRJC 2019, Book of Proceedings, hal-02971995v2, 11
Link