Name: HEASA 2025 (16 - 20 September)
Start: 2025-09-16T18:30:00+02:00
End: 2025-09-20T11:05:00+02:00
Location: No location set

HEASA 2025 (16 - 20 September)

from Tuesday, 16 September 2025 (18:30) to Saturday, 20 September 2025 (11:05)

Monday, 15 September 2025
Tuesday, 16 September 2025

19:00 Welcome Function - Dinner
Welcome Function - Dinner
19:00 - 21:00
Wednesday, 17 September 2025

07:00 Breakfast
Breakfast
07:00 - 08:30
08:30 Opening
08:30 - 09:00
Contributions

08:30 Welcome by Markus Böttcher on behalf of SA-GAMMA - Markus Boettcher

08:35 Remarks by Takalani Nemaungani on behalf of DSTI

08:40 Remarks by Angus Paterson on behalf of NRF

08:45 Remarks by Kulsum Kondiah on behalf of UJ Faculty of Science

08:50 Welcome by Soeb Razzaque on behalf of LOC/ host - Soebur Razzaque
09:00 Instrumentation
09:00 - 10:35
Contributions

09:00 Status, recent results and outlook of the KM3NeT neutrino telescope in the Mediterranean Sea - Paul De Jong (Nikhef National institute for subatomic physics (NL))

09:30 NEON experiment in the multi-messenger era - Lili Yang (Sun Yat-sen University)

09:45 NEON experiment: current progress and detectability for extragalactic sources - Caijin Xie (Sun Yat-sen university)

10:00 Preparatory studies for the Africa Milimetre Telescope - Lott Frans (University of Namibia)

10:20 A Fast Imaging Pipeline for Transient Detection in Interferometric Data - Vladislav Stolyarov (University of Cambridge)
10:35 Coffee Break
Coffee Break
10:35 - 11:00
11:00 Multi-Messenger & Extreme Cosmic Frontier
11:00 - 12:30
Contributions

11:00 The Gravitational Wave Transient Catalog 4: Results and Tests of General Relativity - Ofek Birnholtz (Bar Ilan University)

11:30 Investigating neutron star ULXs as evolutionary precursors to short gamma-ray bursts. - Lutendo Nyadzani (University of Johannesburg)

11:45 The Stability of Anisotropic Compact Stars Influenced by Dark Matter under Teleparallel Gravity: An Extended Gravitational Deformation Approach - Sneha Pradhan (BITS Pilani Hyderabad campus)

12:00 Constraining GRB Prompt Emission Parametres Using IceCube Neutrino Upper Limits and pγ Simulation - Khushboo Sharma (Aryabhatta Research Institute of Observational Sciences, Nainital, India)

12:15 Searching for astrophysical sources of the highest-energy neutrino event - Soebur Razzaque
12:30 Lunch Break
Lunch Break
12:30 - 13:30
13:30 AGN: 1
1
13:30 - 15:30
Contributions

13:30 High-energy cosmic neutrinos, supermassive black holes, and gravitational lensing - Silke Britzen (MPIFR)

14:00 X-Ray Polarization in Blazars - Markus Boettcher

14:15 Dissecting Blazar Emission with IXPE: A Polarimetric Survey of BL Lac Objects - Athira M Bharathan (North-West University, South Africa)

14:30 Angle-dependent and polarization-sensitive synchrotron and SSC blazar model - Motseothata Tisang

14:45 Multi-Wavelength Study of Blazar PKS 0446+11 in connection with IceCube Neutrino Event IC240105A - Rukaiya Khatoon

15:00 Compton-induced $\gamma$-ray cascade emissions in radio galaxy NGC 1275. - Mfuphi Ntshatsha

15:15 Disks, Jets, and Surprises: Exploring the X-ray Variability of Jetted AGNs (Blazars and Jetted NLSy1 Galaxies). - Suvas Chaudhary (Department of Physics, University of the Free State, 205 Nelson Mandela Dr., Bloemfontein, 9300, South Africa.)
15:30 Coffee Break
Coffee Break
15:30 - 16:00
16:00 AGN: 2
2
16:00 - 17:30
Contributions

16:00 From Fermi to Fractals: Stochastic Particle Acceleration in Strong MHD Turbulence - Frans van der Merwe (Centre for Space Research, North-West University)

16:15 Modelling Variability in the Emission and Polarization of Sub-Parsec Scale AGN Jets with 3D RMHD PLUTO Simulations - Izak van der Westhuizen

16:30 The study of extended radio galaxies in MERGHERS fields - Banele Mthembu (University of KwaZulu-Natal (National Astrophysics & Space Science Programme))

16:45 Radio continuum emission predominantly traces star-formation in radio-quite active galactic nuclei - Thando Kekana (University of Johannesburg)

17:00 The I Zw 1 type AGN: busy in X-rays but optically quiet - Hartmut Winkler

17:15 Blazar Variability and Time Lags at Millimetre Wavelengths: Insights from Metsähovi and ALMA Monitoring - Hiiko Katjaita (University of Namibia)
19:00 Dinner
Dinner
19:00 - 20:30
Thursday, 18 September 2025

07:00 Breakfast
Breakfast
07:00 - 09:00
09:00 GRBs, FRBs & other Transients
09:00 - 10:30
Contributions

09:00 Fast Radio Bursts as Tools for Astrophysics and Cosmology - Jéferson Fortunato (University of Cape Town)

09:15 Constraints on Cosmological Parameters Using Gamma-Ray Bursts with Measured and Machine Learning–Derived Redshifts - Tamador Aldowma (Johannesburg University, Omdurman Islamic University)

09:30 Investigating machine learning approaches for differentiating MGFs and SGRBs - Dimakatso Maheso

09:45 GRB 250129A: linking late-time afterglow polarisation to jet Structure and viewing geometry - ankur ghosh (University of Johannesburg)

10:00 Time-resolved spectro-polarimetric analysis of extremely bright GRB 230307A: Evidence of evolution from photospheric to synchrotron dominated emission - soumya gupta (Bhabha Atomic Research Center)

10:15 Compton polarization signatures in gamma-ray burst models - Pieter Vd Merwe
10:30 Coffee Break
Coffee Break
10:30 - 11:00
11:00 Astroparticle & Other High-Energy Sources
11:00 - 12:30
Contributions

11:00 Search for dark matter particles with current and future ground-based gamma-ray observatories - Gabrijela Zaharijas (University of Nova Gorica)

11:30 Looking for axion decay around a black hole - Javeria Makda (University of the Witwatersrand)

11:45 Astrophysical Neutrinos as Probes of Dark Matter around AGN - Khushboo Dixit (Centre for Astro-Particle Physics, University of Johannesburg)

12:00 Prospects on detection of the Fermi Bubbles with CTAO - Francesco Xotta (University of Nova Gorica)

12:15 Discovery of Spin-Modulated Circular Polarisation and Radial Velocity Variations in the Intermediate Polar 1RXS J080114.6–462324, with a possible long orbital period - Victor Moloi (University of Cape Town/ South African Astronomical Observatory)
12:30 Lunch Break
Lunch Break
12:30 - 13:30
13:30 Pulsars and Pulsar Wind Nebulae
13:30 - 15:00
Contributions

13:30 Dark matter search with a MeerKAT Pulsar Polarisation Array - Michael Sarkis (Stellenbosch University)

13:45 Modelling Pulsar Gamma-ray Light Curves using a Geometric Current Sheet Model - Christo Venter

14:00 A Phase-Resolved Study of Bright Fermi-LAT Pulsars - Hend Hamed (North-West University)

14:15 Modelling the high-energy emission of the Vela pulsar as synchro-curvature radiation - Monica Barnard (Centre for Space Research, North-West University, Potchefstroom 2520, South Africa)

14:30 MeerKAT Observations of White Dwarf Pulsars - Emil Meintjes (Univeristy of Cape Town)

14:45 Fermi-LAT Observations of fast rotating, magnetic white dwarfs J191213.72-441045.1 and EUVE J0317-85.5 - Lurgasho Minnie (University of the Free State)
15:00 Poster Session - Gong Talks
15:00 - 15:30
Contributions

15:00 Emission modelling of spider binary systems - Heinrich Hurter (Centre for Space Research, North-West University)

15:03 Refining the orbital solution of the gamma-ray binary LMC P3 - Rick Qhwabe (University of the Free State)

15:06 Multi-Wavelength Blazar Modelling - Joshua Robinson (North-West University)

15:09 Namibian Astronomy: Exploiting Favorable Conditions for Multi-Wavelength Observatories - Hiiko Katjaita (University of Namibia)

15:12 Prospects of the AMT single-dish science performance for monitoring AGN - Michael Backes (University of Namibia)

15:15 H.E.S.S. detection and multiwavelength study of the z ∼ 1 blazar PKS 0346-27 - Ogochukwu Chibueze (NORTH WEST UNIVERSITY, POTCHEFSTROOM, SOUTH AFRICA)

15:18 Investigating Spectral Width Evolution in Gamma-Ray Bursts - soumya gupta (Bhabha Atomic Research Center)

15:21 Multi wavelength Analysis of Dwarf Novae Eruptions - Keith McPherson

15:24 Unveiling the Accretion Geometry of QS Tel Through Coordinated Photometric, Spectroscopic, and Polarimetric Observations - Lutho Booi (University of Cape Town/ SAAO)
15:30 Coffee Break
Coffee Break
15:30 - 16:00
16:00 X-Ray and Gamma-Ray Binaries
16:00 - 17:35
Contributions

16:00 Radiation Signatures of Electron Acceleration in the Decelerating Jet of MAXI J1348-630 - Aishwarya Sarath (Universidad Diego Portales)

16:15 Investigating the impact of circumstellar discs on the non-thermal emission of HESS J0632+057 and other Be gamma-ray binaries - Natalie Matchett

16:30 The multi-wavelength behaviour of the gamma-ray binary PSR B1259-63/LS 2883 around the 2024 periastron passage - Brian van Soelen

16:45 Radio/X-ray Monitoring of Two Gamma-ray Binaries: 1FGL J1018.6-5856 and LMC P3 - Andries Mathiba (University of Cape Town)

17:05 Can $\gamma$-rays be detected from accretion-driven systems? - Spencer Tendai Madzime (University of the Free State)

17:20 Modeling Particle Acceleration and Multi-Wavelength Emission of a PeVatron microquasar V4641 Sgr - Anton Dmytriiev (North-West University)
19:00 Dinner
Dinner
19:00 - 21:00
Friday, 19 September 2025

07:00 Breakfast
Breakfast
07:00 - 08:30
08:30 AGN: 3
3
08:30 - 11:30
Contributions

08:30 Optical and Radio Follow-up of Ultra-High-Energy Neutrino Source Candidates - Yulia Sotnikova (Special Astrophysical Observatory of the Russian Academy of Sciences (SAO RAS))

09:00 Multiband studies of bright blazars sample with SAO RAS telescopes - Valery Vlasyuk (Special Astrophysical Observatory of Russian Academy of Sciences)

09:15 Radio and Optical Properties of the Blazar PKS 1614+051 at z=3.21 - Alexander Mikhailov

09:30 Hidden by a star: The redshift and the offset broad line of the flat-spectrum radio quasar PKS 0903–57 - Eli Kasai (University of Namibia)

09:45 An Optical Spectropolarimetric Survey of TeV-emitting Blazars - Joleen Barnard

10:00 Two-zone modelling of the very bright and variable FSRQ 3C 279 - Anna Luashvili (Centre for Space Research - North-West University)

10:15 Time-Dependent Leptonic Modeling of the High-Redshift Blazar 4C +01.02 Using Multiwavelength Observations - Shruti Mukherjee (The University of Free State, Bloemfontein, South Africa)

10:30 The Uncertain Universe and the First Measurement - Konstantin Zloshchastiev (Durban University of Technology)
11:30 Group Photo and Early Lunch
Group Photo and Early Lunch
11:30 - 12:20

12:20 Excursion
Excursion
12:20 - 16:20

16:20 Coffee Break
Coffee Break
16:20 - 16:50

17:00 SA-GAMMA Executive Committee Meeting

17:00 - 18:00

19:00 Conference Dinner
Conference Dinner
19:00 - 21:30
Saturday, 20 September 2025

05:00 Breakfast
Breakfast
05:00 - 09:00

09:05 Check Out (10:00)
Check Out (10:00)
09:05 - 10:00

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