PoS - Proceedings of Science

High Energy Astrophysics in Southern Africa 2021

HEASA2021 - (other heasa conferences)
13 - 17 September, 2021

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.

Editorial Board

conference main image
Session: Transients
Session: Active Galactic Nuclei
Session: X-ray Binaries
Session: High-Energy Polarimetry
Session: Multi-Messenger and Astro-Particle
Session: Pulsars
Session: Other High-Energy Sources and Outreach
Session: Posters
Session: Transients
The transient high-energy sky seen with H.E.S.S.
PoS(HEASA2021)001 file missing F. Schüssler
On the origin of very high energy gamma-rays from gamma-ray bursts
PoS(HEASA2021)002 file missing X. Wang
Results from the SALT e-ROSITA transient followup programme
PoS(HEASA2021)003 file missing D. Buckley
Session: Active Galactic Nuclei
First Event Horizon Telescope results and future prospects
PoS(HEASA2021)004 file missing S. Issaoun
A roadmap for a compensium of supermassive black hole images
PoS(HEASA2021)005 file missing V. Ramakrishnan
The M87 ring in polarised light and polarimetryc synthetic data modelling
PoS(HEASA2021)006 file missing I. Natarajan
Active galactic nuclei in the faint radio sky
PoS(HEASA2021)007 file missing J. Radcliffe
Comprehensive power spectral density analysis of the Fermi-LAT gamma-ray light curves of selected blazars
PoS(HEASA2021)008 pdf N. Żywucka
Optical Spectropolarimetry Observations of the BL Lac-type object PKS 0537-441 after a period of quiescence
PoS(HEASA2021)009 pdf J. Barnard, B. van Soelen, J. Cooper, R. Britto, J.P. Marais, I. van der Westhuizen, D. Buckley, H. Schutte, M. Böttcher, B. Vaidya, S. Achariya and A. Martin-Carrillo
Modeling the spectral energy distributions and multi-wavelength polarisation of blazars
PoS(HEASA2021)010 file missing H. Schutte
Probing magnetic fields in active galactic nuclei jets
PoS(HEASA2021)011 file missing E. Kravchenko
MeerKAT observations of radio galaxies
PoS(HEASA2021)012 file missing I. Whittam
RX J0818.2+0122 - an AGN with an unusually broad Keplerian rotator line profile
PoS(HEASA2021)013 pdf A.M.A. Moeng, H. Winkler and F. van Wyk
Simulations of stochastic long-term variability in leptonic models for external-Compton and synchrotron self-Compton dominated blazars
PoS(HEASA2021)014 file missing H. Thiersen
Simulating AGN light curves of blob injection in RMHD jet simulations
PoS(HEASA2021)015 file missing D. Kulik
Jets and disc-winds from magnetically driven flows around black holes
PoS(HEASA2021)016 file missing I. Dihingia
A study of the lobes of the radio galaxy Hydra A using MeerKAT observations
PoS(HEASA2021)017 file missing M. Naidoo, D. Prokhorov, P. Marchegiani, A. Chen, S. Makhathini, P. Serra and E. de Blok
Geodetic and astrometric VLBI observations to monitor radio source structure in the South
PoS(HEASA2021)018 file missing S. Basu
Multi-wavelength study of HBL 1ES 1959+650 during various flares over 6 years of major activities
PoS(HEASA2021)019 file missing S. Chandra
A shock-in-jet synchrotron mirror model
PoS(HEASA2021)020 file missing M. Böttcher
ExHaLe-Jet: An extended hadro-leptonic jet model for blazars
PoS(HEASA2021)021 file missing M. Zacharias
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 file missing M. Ntshatsha
Radiation from relativistic particles accelerated at shear layers in relativistic jets
PoS(HEASA2021)023 file missing T.B. Chand
A new approach to search for binary black holes with Fermi-LAT
PoS(HEASA2021)041 file missing M. Kreter
Session: X-ray Binaries
A decade of black hole X-ray binary transients
PoS(HEASA2021)024 pdf P. Charles
Be X-ray binary 4U 1901+03: Cyclotron resonance scattering feature and its imprint on the pulse profile
PoS(HEASA2021)025 file missing A. Beri
Determining the orbital parameters of the gamma-ray binary HESS J0632+057
PoS(HEASA2021)026 file missing N. Matchett
Advances with NICER on neutron stars, accreting black holes, and optical transients in nearby galaxies
PoS(HEASA2021)027 file missing R. Remillard
Gamma-gamma absorption in gamma-ray binaries
PoS(HEASA2021)028 pdf B. van Soelen and D. du Plooy
On the long-term optical and X-ray behaviour of sibling SMC Be X-ray binaries SXP15.3 and SXP305
PoS(HEASA2021)029 file missing I. Monageng
A decade of black hole X-ray binary transients
PoS(HEASA2021)031 file missing A. Zdziarski
Hercules X-1 (Her X-1): New results from the past decade of observations
PoS(HEASA2021)032 pdf D. Leahy
Determining the orbital parameters of the gamma-ray binary HESS J0632+057
PoS(HEASA2021)033 file missing K. Gasealahwe
Session: High-Energy Polarimetry
X-ray spectropolarimetric observations of black holes and magnetars with IXPE and XL-Calibur
PoS(HEASA2021)034 file missing H. Krawczynski
Monte-Carlo Applications for Partially Polarized Inverse External-Compton Scattering
PoS(HEASA2021)035 file missing L. Dreyer
Session: Multi-Messenger and Astro-Particle
Probing AGN jets with high-energy neutrinos
PoS(HEASA2021)036 file missing M. Petropoulou
Line of sight neutrinos and gamma-rays from blazars associated with IceCube neutrinos
PoS(HEASA2021)037 file missing S. Razzaque
Shaken, not stirred: Test particles in binary black hole mergers
PoS(HEASA2021)038 file missing P. van der Merwe
Simulation of the binary black hole merger rate with ultraluminous X-ray source progenitors
PoS(HEASA2021)039 file missing L. Nyadzani
Linking the LHC and astrophysics with anomalies
PoS(HEASA2021)040 file missing G. Beck, R. Temo, E. Malwa, M. Kumar and B. Mellado
Session: Pulsars
Modeling globular clusters as multi-wavelength emitters
PoS(HEASA2021)042 pdf H. Davids, C. Venter and M. Backes
Constraining the magnetic field geometry of the millisecond pulsar PSR J0030+0451 using NICER and Fermi data
PoS(HEASA2021)043 file missing A. Kundu
Constraining the non-thermal emission site and geometry of AR Sco via optical polarimetry
PoS(HEASA2021)044 file missing L. Du Plessis
Low power pulsed emission at the spin period of the WD in AR Scorpii?
PoS(HEASA2021)045 pdf Q. Kaplan, P.P.J. Meintjes and D.H.J. van Heerden
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 S.T. Madzime, P. Meintjes, H. van Heerden, K.K. Singh, D. Buckley, P.A. Woudt and R. Fender
Pulsar high-energy emission models
PoS(HEASA2021)047 pdf A.K. Harding
Probing the nature of the young and energetic nebula Kes 75 via spatio-spectral modelling
PoS(HEASA2021)048 file missing C. Venter
Phase-resolved spectroscopy of millisecond pulsars in the Third Fermi-LAT pulsar catalogue
PoS(HEASA2021)049 file missing H. Yassin
Session: Other High-Energy Sources and Outreach
Astronomy for development: The namibian example
PoS(HEASA2021)050 file missing H. Dalgleish
Leptonic non-thermal emission from supernova remnants evolving in the circumstellar magnetic field
PoS(HEASA2021)051 file missing I. Sushch
Spectral and temporal analysis of GRB 210410A detected by Fermi-LAT
PoS(HEASA2021)052 file missing D. Maheso
Fast radio bursts - Current state of the field
PoS(HEASA2021)053 file missing Z. Wadiasingh
Models for Sgr A* flares: from a general analytical to magnetic reconnection model
PoS(HEASA2021)030 file missing A. Dmytriiev
Session: Posters
Modellling the synchrotron emission of RMHD AGN jet simulations with the PLUTO particle module
PoS(HEASA2021)054 file missing I. van der Westhuizen
Spectral analysis of S5 1803+784 in the recent flaring state
PoS(HEASA2021)055 pdf J. Omojola and A. Chen
Development of tools for SALT/RSS spectropolarimetry reductions: application to the blazar 3C279
PoS(HEASA2021)056 file missing J. Cooper, B. van Soelen and R. Britto
Optical variability modeling of newly identified blazars and blazar candidates behind the Magellanic Clouds
PoS(HEASA2021)057 file missing N. Żywucka
Modelling cosmic-ray transport in jets as a correlated random walk
PoS(HEASA2021)058 file missing P. Reichherzer
A hadronic synchrotron mirror model for blazars - Application to 3C 279
PoS(HEASA2021)059 file missing L.L. Oberholzer
Results from the O3 observing run of the LIGO/VIRGO collaboration
PoS(HEASA2021)060 pdf R. Poggiani

When the link to the pdf file is not available, the contribution in question has not yet been accepted for publication.