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Matthias Meier (Technical University of Munich (TUM))Poster only
The CubeSat mission ComPol will investigate the black hole binary system Cygnus X-1. The goal is to improve its physical model by measuring the polarization of the hard X-ray spectrum (20 – 300 keV). The information about the polarization can be extracted from the kinematics of the Compton scattering. A Silicon Drift Detector (SDD) is used as a scatterer. The SDD is stacked onto a CeBr3...
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Dr Mudit Kumar Srivastava (Astronomy and Astrophysics Division, Physical Research Laboratory)Poster only
Physical Research Laboratory (PRL), India, has been operating a 1.2m optical-near infrared (NIR) telescope at Gurushikhar peak, Mt. Abu, India, since the mid-1990s and is establishing another 2.5m telescope at the same site, which will be operational by the end of 2022. Optical and NIR spectroscopy studies of transients (novae, supernovae etc.) have been a forte of the observatory's science...
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Fabio La Monaca (Istituto Nazionale di Astrofisica (INAF) - IAPS)Poster only
Imaging X-ray Polarimetry Explorer (IXPE) is the first observatory fully dedicated to study the polarization of X-ray sources, it works in the 2-8 keV energy band and thanks to imaging capabilities allows to study polarimetry spatially resolved for the first time. During the first year of observations, Vela Pulsar Wind Nebula (PWN) has been observed for the first time allowing to detect a...
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Dr SUMAN BALA (IIT Bombay)Poster only
Daksha is an ambitious mission, expected to be the most sensitive high energy time-domain telescope. It will detect the highest number of GRBs and other high energy transients than any other mission. In addition to the interesting science with fainter and more distant sources, Daksha will also significantly impact the study of bright transients by measuring rapid spectral and temporal...
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Dr Sujay Mate (Tata Institute of Fundamental Research, Mumbai, India)Poster only
Daksha, a proposed Indian mission, will be the most sensitive all-sky high-energy time domain telescope in the world. Daksha will detect and characterise about ten electromagnetic counterparts of the gravitational wave (EMGW) events per year and about thousand classical GRBs (especially high redshift GRBs) per year. For bright transients, Daksha will be able to measure hard X-ray polarisation,...
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Dr Santiago Gonzalez-Gaitan (CENTRA, IST, University of Lisbon)Oral
Imaging polarimetry evolution of supernovae can provide invaluable information on the explosion asymmetries and the circumstellar material ejected by the progenitor. However, constraining the insterstellar polarization (ISP) from the Milky Way and the host galaxy are necessary ingredients to obtain the intrinsic polarization of any transient. Traditionally, the ISP has been estimated through...
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Elena Shablovinskaya (Special Astrophysical Observatory of RAS)Poster only
Recently, our group has discovered new possibilities for studying AGN in polarized light, which has been a "reboot" for some branches of optical research. First, it was shown that all-night monitoring of BL Lac type objects with high accuracy and temporal resolution in polarized light allows us to estimate the size of an optical jet, and the intraday variability is consistent with a simple...
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Ion Cojocari (CEA)Poster only
Polarimetry has become one of the latest potential tools to be used in the study of high energy astrophysical phenomena. Following INTEGRAL polarisation measurements in the gamma ray range and subsequent studies done by AstroSAT and POLAR, polarisation capability has become an important design parameter for future x/gamma ray instruments like Astrogam, Polix, COSI. The scientific communities...
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Prof. Agnieszka Słowikowska (Nicolaus Copernicus University in Toruń)Poster only
In my talk, I will briefly present the results of polarimetric studies
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of various types of astronomical objects with small and medium-size
telescopes, i.e. pulsars, pulsar wind nebula, white dwarfs and high
mass X-ray binaries with Be stars as well as multiband polarimetry of
Kepler filed stars. I will describe several different polarimeters, to
name a few: the high-time resolution... -
Sujay Mate (Tata Institute of Fundamental Research, Mumbai, India)Poster only
POLIX is an X-ray polarimeter working in the energy range of 8-30 keV and the main scientific payload onboard the upcoming Indian astronomy mission XPoSat (X-ray Polarimeter Satellite) dedicated to study of polarization of cosmic X-ray sources. The polarisation measurements will be performed using anisotropic Thomson scattering of polarised X-rays and this will be enabled by spinning the...
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Claudia Rodrigues (Instituto Nacional de Pesquisas Espaciais - INPE/Brazil)Poster only
We present the development status of a new instrument for the 1.6m telescope of Observatório do Pico dos Dias/Brazil: SPARC4 - Simultaneous Polarimeter And Rapid Camera in 4 bands. This instrument will use four frame-transfer EMCCDs to acquire simultaneously four images in optical broad bands similar to the g, r, i, and z bands of the SDSS photometric system. SPARC4 can be used as a...
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Ms Gulafsha B. Choudhury (Department of Physics, Assam University Silchar, India-788011)Poster only
The formation of stars in our galaxy is a result of collapse and fragmentation in giant molecular clouds. Bok globules and Lynd’s clouds, being the simplest, isolated molecular clouds (dark clouds) in our galaxy, are considered as the ideal sites for low-mass star formation. In this work, we study the magnetic field morphology traced via optical polarimetry of selected Bok globules and Lynd’s...
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Ms Asuka Kuwata (Astronomical Institute, Graduate School of Science, Tohoku University)Poster only
The afterglows of gamma-ray bursts (GRBs) are non-thermal electron synchrotron emissions from relativistic shocks. The amplification mechanism of magnetic field at the shocks is one of the major problems in high-energy astrophysics, which could be solved by polarimetric observations. Two field amplification mechanisms, Weibel instability and magnetohydrodynamic instability, have been proposed...
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Callum McCall (Liverpool John Moores University)Poster only
Blazars are highly variable sources that emit light across the entire electromagnetic spectrum. The period of their variability can range from intra-night minute/hour long timescales, day/week timescales, and have even been known to vary over the course of years. This makes high cadence observations key to understanding the processes producing the observed radiation. This is no more apparent...
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Dr Alex Cavaliéri Carciofi, Mrs Ariane Cristina Fonseca SilvaPoster only
About 20% of the B-type stars rotates very rapidly. Among these are the classical Be stars, which eject material and build up gaseous circumstellar ‘decretion’ disks. Rotation plays a significant role in the structure and evolution of massive stars, yet in many aspects is poorly understood. One viable evolutionary pathway to acquire near-critical rotation is through binary interaction - namely...
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Antonia Morales-Garoffolo (University of Cadiz (Spain))Poster only
In the last years great progress has been achieved on our understanding of supernovae (SNe). However, there are still many unknowns on the nature of the progenitor systems, their environment, and the physics behind the explosions. An important approach in this context is to use polarimetric data, which are scarce compared to spectrophotometry and can reveal essential information on the...
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