First M87 Event Horizon Telescope Results. IV. Imaging the Central Supermassive Black Hole
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"First M87 Event Horizon Telescope R..." refers methods in this paper
...…this Letter, we present images using their equivalent brightness temperatures defined by the Rayleigh– Jeans law: T Ic kb 2 2 2= n n , where Iν is the specific intensity, c is the speed of light, ν is the observing frequency, and k is the Boltzmann constant (e.g., Rybicki & Lightman 1979)....
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2,589 citations
"First M87 Event Horizon Telescope R..." refers methods in this paper
...For the RML reconstructions in this Letter, we used two open-source software libraries that have been developed specifically for the EHT: eht-imaging109 (Chael et al. 2016, 2018, 2019) and SMILI110 (Akiyama et al. 2017a, 2017b, 2019)....
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"First M87 Event Horizon Telescope R..." refers background or methods in this paper
...Regularizing functions can be combined; e.g., simultaneously favoring both sparsity and smoothness through regularization can 108 The FOVarr of an interferometric array depends on the primary beams of the antennas and the averaging time and bandwidth (Thompson et al. 2017)....
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...For a pair of telescopes at fixed locations on the Earth, their projected baseline coordinates (u, v) trace an ellipse as the Earth rotates, sampling a range of spatial frequencies (Thompson et al. 2017)....
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...The EHT utilizes standard 2-bit recording, for which ηQ=0.88 (Thompson et al. 2017)....
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...Station-based errors were added in a Jones matrix formalism (Thompson et al. 2017; see Appendix C.2)....
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