HEASA 2021 was the eighth conference in the annual series "High Energy Astrophysics in Southern Africa". Its goal was to bring together scientists from the southern African region, the African continent, and around the world with an interest in high-energy astrophysical phenomena. Topics discussed included theoretical, multi-wavelength, and multi-messenger observational aspects of astrophysical sources (e.g. active galactic nuclei (AGNs), galaxy systems, gamma-ray bursts (GRBs), X-ray/gamma-ray binaries, supernovae and supernova remnants, neutron stars, pulsars and pulsar wind nebulae, cataclysmic variables (CVs)) as well as modern aspects of astro-particle physics. HEASA 2021 was held during the period of 13-17 September, as an online conference with half-day sessions. In addition to invited, contributed, and poster presentations, recent Ph.D. graduates (Ph.D. thesis submitted after August 2019) may present an extended dissertation talk.
| Session: Transients |
| The transient high-energy sky seen with H.E.S.S. PoS(HEASA2021)001 
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| On the origin of very high energy gamma-rays from gamma-ray bursts PoS(HEASA2021)002
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| Results from the SALT e-ROSITA transient followup programme PoS(HEASA2021)003
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| Session: Active Galactic Nuclei |
| First Event Horizon Telescope results and future prospects PoS(HEASA2021)004
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| A roadmap for a compensium of supermassive black hole images PoS(HEASA2021)005
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| The M87 ring in polarised light and polarimetryc synthetic data modelling PoS(HEASA2021)006
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| Active galactic nuclei in the faint radio sky PoS(HEASA2021)007
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| Comprehensive power spectral density analysis of the Fermi-LAT gamma-ray light curves of selected blazars PoS(HEASA2021)008 pdf |
| Optical Spectropolarimetry Observations of the BL Lac-type object PKS 0537-441 after a period of quiescence PoS(HEASA2021)009 pdf |
| Modeling the spectral energy distributions and multi-wavelength polarisation of blazars PoS(HEASA2021)010
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| Probing magnetic fields in active galactic nuclei jets PoS(HEASA2021)011
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| MeerKAT observations of radio galaxies PoS(HEASA2021)012
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| RX J0818.2+0122 - an AGN with an unusually broad Keplerian rotator line profile PoS(HEASA2021)013 pdf |
| Simulations of stochastic long-term variability in leptonic models for external-Compton and synchrotron self-Compton dominated blazars PoS(HEASA2021)014
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| Simulating AGN light curves of blob injection in RMHD jet simulations PoS(HEASA2021)015
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| Jets and disc-winds from magnetically driven flows around black holes PoS(HEASA2021)016
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| A study of the lobes of the radio galaxy Hydra A using MeerKAT observations PoS(HEASA2021)017
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| Geodetic and astrometric VLBI observations to monitor radio source structure in the South PoS(HEASA2021)018
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| Multi-wavelength study of HBL 1ES 1959+650 during various flares over 6 years of major activities PoS(HEASA2021)019
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| A shock-in-jet synchrotron mirror model PoS(HEASA2021)020
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| ExHaLe-Jet: An extended hadro-leptonic jet model for blazars PoS(HEASA2021)021
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| Modeling emissions from secondary electron-positron pairs created by absorption of gamma-rays in the broad-line region of blazars and their contribution to the broadband SED PoS(HEASA2021)022
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| Radiation from relativistic particles accelerated at shear layers in relativistic jets PoS(HEASA2021)023
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| A new approach to search for binary black holes with Fermi-LAT PoS(HEASA2021)041
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| Session: X-ray Binaries |
| A decade of black hole X-ray binary transients PoS(HEASA2021)024 pdf |
| Be X-ray binary 4U 1901+03: Cyclotron resonance scattering feature and its imprint on the pulse profile PoS(HEASA2021)025
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| Determining the orbital parameters of the gamma-ray binary HESS J0632+057 PoS(HEASA2021)026
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| Advances with NICER on neutron stars, accreting black holes, and optical transients in nearby galaxies PoS(HEASA2021)027
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| Gamma-gamma absorption in gamma-ray binaries PoS(HEASA2021)028 pdf |
| On the long-term optical and X-ray behaviour of sibling SMC Be X-ray binaries SXP15.3 and SXP305 PoS(HEASA2021)029
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| A decade of black hole X-ray binary transients PoS(HEASA2021)031
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| Hercules X-1 (Her X-1): New results from the past decade of observations PoS(HEASA2021)032 pdf |
| Determining the orbital parameters of the gamma-ray binary HESS J0632+057 PoS(HEASA2021)033
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| Session: High-Energy Polarimetry |
| X-ray spectropolarimetric observations of black holes and magnetars with IXPE and XL-Calibur PoS(HEASA2021)034
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| Monte-Carlo Applications for Partially Polarized Inverse External-Compton Scattering PoS(HEASA2021)035
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| Session: Multi-Messenger and Astro-Particle |
| Probing AGN jets with high-energy neutrinos PoS(HEASA2021)036
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| Line of sight neutrinos and gamma-rays from blazars associated with IceCube neutrinos PoS(HEASA2021)037
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| Shaken, not stirred: Test particles in binary black hole mergers PoS(HEASA2021)038
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| Simulation of the binary black hole merger rate with ultraluminous X-ray source progenitors PoS(HEASA2021)039
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| Linking the LHC and astrophysics with anomalies PoS(HEASA2021)040
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| Session: Pulsars |
| Modeling globular clusters as multi-wavelength emitters PoS(HEASA2021)042 pdf |
| Constraining the magnetic field geometry of the millisecond pulsar PSR J0030+0451 using NICER and Fermi data PoS(HEASA2021)043
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| Constraining the non-thermal emission site and geometry of AR Sco via optical polarimetry PoS(HEASA2021)044
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| Low power pulsed emission at the spin period of the WD in AR Scorpii? PoS(HEASA2021)045 pdf |
| The detection of pulsed emission at the spin period of the white dwarf in AE Aquarii in MeerKAT and Fermi-LAT data PoS(HEASA2021)046 pdf |
| Pulsar high-energy emission models PoS(HEASA2021)047 pdf |
| Probing the nature of the young and energetic nebula Kes 75 via spatio-spectral modelling PoS(HEASA2021)048
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| Phase-resolved spectroscopy of millisecond pulsars in the Third Fermi-LAT pulsar catalogue PoS(HEASA2021)049
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| Session: Other High-Energy Sources and Outreach |
| Astronomy for development: The namibian example PoS(HEASA2021)050
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| Leptonic non-thermal emission from supernova remnants evolving in the circumstellar magnetic field PoS(HEASA2021)051
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| Spectral and temporal analysis of GRB 210410A detected by Fermi-LAT PoS(HEASA2021)052
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| Fast radio bursts - Current state of the field PoS(HEASA2021)053
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| Models for Sgr A* flares: from a general analytical to magnetic reconnection model PoS(HEASA2021)030
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| Session: Posters |
| Modellling the synchrotron emission of RMHD AGN jet simulations with the PLUTO particle module PoS(HEASA2021)054
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| Spectral analysis of S5 1803+784 in the recent flaring state PoS(HEASA2021)055 pdf |
| Development of tools for SALT/RSS spectropolarimetry reductions: application to the blazar 3C279 PoS(HEASA2021)056
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| Optical variability modeling of newly identified blazars and blazar candidates behind the Magellanic Clouds PoS(HEASA2021)057
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| Modelling cosmic-ray transport in jets as a correlated random walk PoS(HEASA2021)058
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| A hadronic synchrotron mirror model for blazars - Application to 3C 279 PoS(HEASA2021)059
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| Results from the O3 observing run of the LIGO/VIRGO collaboration PoS(HEASA2021)060 pdf |
When the link to the pdf file is not available, the contribution in question has not yet been accepted for publication.