High Energy Astrophysics and Cosmology in the era of all-sky surveys

Session

X-rays and VHE gamma-rays

8 Oct 2024, 14:15

72. Recent Developments Towards All-sky Surveys and Selected Results from Ground-based Gamma-ray Astrophysics

Dr Razmik Mirzoyan (Max-Planck Institute for Physics)

08/10/2024, 14:15

Invited

In this report we would like to discuss recent developments in ground-based gamma-ray astrophysics. Since the 1990s, very high energy gamma rays have been studied with the Imaging Atmospheric Cherenkov Telescopes (IACT), which measure the Cherenkov light component of air showers. These have high sensitivity in a field of view of several degrees and can provide angular resolution on the order...

71. Multi-wavelength surveys in the Cherenkov Telescope Array era

Dr Elena Pian (INAF-OAS, Bologna)

08/10/2024, 14:45

Invited

The Cherenkov Telescope Array will bring an entirely new view on high-energy transients. This opportunity will be enhanced by the coming on line of various large field-of-view ground-based and orbiting facilities that will paint a multi-wavelength picture of the variable sky. I will discuss some of the exploration areas and projects development, including the VST Polarimetric camera (VSTPol).

35. Surveys in TeV Astronomy with Cherenkov telescopes in a multi messenger and multifrequency context

Antonio Stamerra (INAF-OAR)

08/10/2024, 15:15

Regular

Extragalactic TeV astronomy with Cherenkov telescopes is synergistic with multi-frequency and multi-messenger observations, conducted through observational campaigns or triggers (target of opportunities).

We will outline these two main directions by presenting recent results from multifrequency observations of blazars, such as the quasi-periodic PG1553+113, and by discussing the prospects...

60. Particle acceleration in the high-energy Universe

Dr Martin LEMOINE (APC (CNRS - U. Paris Cite))

08/10/2024, 15:35

Invited

The acceleration of charged particles to very high energies in powerful astrophysical sources such as pulsar winds, active galactic nuclei, gamma-ray bursts etc., represents a central question in modern high-energy astrophysics, astroparticle physics and nowadays, multi-messenger astronomy. Accelerated particles can interact with and radiate in ambient fields to produce secondary photon or...

20. LST-1 observations and multiwavelength study of blazar 1ES 1218+304

Abhradeep Roy

08/10/2024, 16:35

Regular

The blazar 1ES 1218+304 is a high-frequency peaked BL Lac object at a cosmological redshift z of 0.182. It was first detected in Very-High Energies (VHE, E>100 GeV) by the MAGIC telescope in 2006. 1ES 1218+304 is known for showing strong flux variability with occasional outbursts across the electromagnetic spectrum. This source also exhibits an atypically hard VHE spectrum. The Large-Sized...

27. Broadband radio properties of the FR0 radio galaxies.

Alexander Mikhailov

08/10/2024, 16:55

Regular

The modern radio sky surveys have shown that compact radio sources, so named FR0 radio galaxies, are the majority among radio loud active galactic nuclei of the local Universe. The numerous FR0 population have to make a significant contribution to cosmic background emissions. These sources have mildly relativistic jets at parsec scales despite lack of prominent extended kpc radio structures....

38. Discovery of six high-luminosity and high-mass quasars in 0.3<z<0.6

nurten ak (Dr.)

Regular

We present the discovery of six low-redshift quasars, identified through spectral observations conducted with the RTT-150 telescope in Türkiye. With redshifts ranging from 0.3 to 0.6, these quasars were selected from candidates listed in the ROSAT survey catalog, focusing on those with i-band magnitudes brighter than 19.5. Our analysis includes detailed modeling of their continuum and emission...