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The persistent shadow of the supermassive black hole of M 87 - I. Observations, calibration, imaging, and analysis

Journal Article

In April 2019, the Event Horizon Telescope (EHT) Collaboration reported the first-ever event-horizon-scale images of a black hole, resolving the central compact radio source in the giant elliptical galaxy M 87. These images reveal a ring with a southerly...

A Search for Pulsars around Sgr A* in the First Event Horizon Telescope Data Set

Journal Article

In 2017 the Event Horizon Telescope (EHT) observed the supermassive black hole at the center of the Milky Way, Sagittarius A* (Sgr A*), at a frequency of 228.1 GHz (lambda = 1.3 mm). The fundamental physics tests that even a single pulsar orbiting Sgr A*...

Polarimetric Geometric Modeling for mm-VLBI Observations of Black Holes

Journal Article

The Event Horizon Telescope (EHT) is a millimeter very long baseline interferometry (VLBI) array that has imaged the apparent shadows of the supermassive black holes M87* and Sagittarius A*. Polarimetric data from these observations contain a wealth of...

First M87 Event Horizon Telescope Results. IX. Detection of Near-horizon Circular Polarization

Journal Article

Event Horizon Telescope (EHT) observations have revealed a bright ring of emission around the supermassive black hole at the center of the M87 galaxy. EHT images in linear polarization have further identified a coherent spiral pattern around the black...

Comparison of Polarized Radiative Transfer Codes Used by the EHT Collaboration

Journal Article

Interpretation of resolved polarized images of black holes by the Event Horizon Telescope (EHT) requires predictions of the polarized emission observable by an Earth-based instrument for a particular model of the black hole accretion system. Such...

The Event Horizon Telescope Image of the Quasar NRAO 530

Journal Article

We report on the observations of the quasar NRAO 530 with the Event Horizon Telescope (EHT) on 2017 April 5-7, when NRAO 530 was used as a calibrator for the EHT observations of Sagittarius A*. At z = 0.902, this is the most distant object imaged by the...

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The persistent shadow of the supermassive black hole of M 87 - I. Observations, calibration, imaging, and analysis

A Search for Pulsars around Sgr A* in the First Event Horizon Telescope Data Set

Polarimetric Geometric Modeling for mm-VLBI Observations of Black Holes

First M87 Event Horizon Telescope Results. IX. Detection of Near-horizon Circular Polarization

Comparison of Polarized Radiative Transfer Codes Used by the EHT Collaboration

The Event Horizon Telescope Image of the Quasar NRAO 530

Unknown Quantities: On Oil Spill Imaging

Silvan Samuel Schweber (10 April 1928–14 May 2017)

Die Gastlehrer des Wiener Kreises: Rudolph Carnap, Herbert Feigl, Otto Neurath, Hans Reichenbach

Foucauldian Positivism: Archive, Clinic, Laboratory

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