Matches in SemOpenAlex for { <https://semopenalex.org/work/W2892772871> ?p ?o ?g. }
- W2892772871 endingPage "549" @default.
- W2892772871 startingPage "537" @default.
- W2892772871 abstract "The separation of cosmological signal from astrophysical foregrounds is a fundamental challenge for any effort to probe the evolution of neutral hydrogen during the Cosmic Dawn and epoch of reionization using the 21 cm hyperfine transition. Foreground separation is made possible by their intrinsic spectral smoothness, making them distinguishable from spectrally complex cosmological signal even though they are ∼5 orders of magnitude brighter. Precisely calibrated radio interferometers are essential to maintaining the smoothness and thus separability of the foregrounds. One powerful calibration strategy is to use redundant measurements between pairs of antennas with the same physical separation in order to solve for each antenna’s spectral response without reference to a sky model. This strategy is being employed by the Hydrogen Epoch of Reionization Array (HERA), a large radio telescope in South Africa that is now observing while being built out to 350 14-m dishes. However, the deviations from perfect redundancy inherent in any real radio telescope complicate the calibration problem. Using simulations of HERA, we show how calibration with antenna-to-antenna variations in dish construction and placement generally leads to spectral structure in otherwise smooth foregrounds that significantly reduces the number of cosmological modes available to a 21 cm measurement. However, we also show that this effect can be largely eliminated by a modified redundant-baseline calibration strategy that relies predominantly on short baselines." @default.
- W2892772871 created "2018-10-05" @default.
- W2892772871 creator A5013594036 @default.
- W2892772871 creator A5024608470 @default.
- W2892772871 creator A5058008520 @default.
- W2892772871 creator A5075884876 @default.
- W2892772871 creator A5088100194 @default.
- W2892772871 date "2019-05-11" @default.
- W2892772871 modified "2023-10-14" @default.
- W2892772871 title "Mitigating the effects of antenna-to-antenna variation on redundant-baseline calibration for 21 cm cosmology" @default.
- W2892772871 cites W1633529777 @default.
- W2892772871 cites W1680526100 @default.
- W2892772871 cites W1899149329 @default.
- W2892772871 cites W1921567268 @default.
- W2892772871 cites W1975679485 @default.
- W2892772871 cites W1996515241 @default.
- W2892772871 cites W1997702548 @default.
- W2892772871 cites W2001694215 @default.
- W2892772871 cites W2005683908 @default.
- W2892772871 cites W2010864262 @default.
- W2892772871 cites W2015250097 @default.
- W2892772871 cites W2020704120 @default.
- W2892772871 cites W2025670910 @default.
- W2892772871 cites W2041928669 @default.
- W2892772871 cites W2043778298 @default.
- W2892772871 cites W2061524193 @default.
- W2892772871 cites W2073938066 @default.
- W2892772871 cites W2078677259 @default.
- W2892772871 cites W2088744859 @default.
- W2892772871 cites W2102117219 @default.
- W2892772871 cites W2110140970 @default.
- W2892772871 cites W2111460811 @default.
- W2892772871 cites W2129875460 @default.
- W2892772871 cites W2133471962 @default.
- W2892772871 cites W2133593080 @default.
- W2892772871 cites W2134435348 @default.
- W2892772871 cites W2147626801 @default.
- W2892772871 cites W2163066012 @default.
- W2892772871 cites W2170108704 @default.
- W2892772871 cites W2173563237 @default.
- W2892772871 cites W2234515242 @default.
- W2892772871 cites W2261471082 @default.
- W2892772871 cites W2289671972 @default.
- W2892772871 cites W2330990687 @default.
- W2892772871 cites W2345814028 @default.
- W2892772871 cites W2357551098 @default.
- W2892772871 cites W2406953026 @default.
- W2892772871 cites W2484293438 @default.
- W2892772871 cites W2520740623 @default.
- W2892772871 cites W2530040139 @default.
- W2892772871 cites W2597412078 @default.
- W2892772871 cites W2787944051 @default.
- W2892772871 cites W2788168931 @default.
- W2892772871 cites W2788581379 @default.
- W2892772871 cites W2793765145 @default.
- W2892772871 cites W2798637335 @default.
- W2892772871 cites W2884820149 @default.
- W2892772871 cites W2898725592 @default.
- W2892772871 cites W3099287506 @default.
- W2892772871 cites W3099769490 @default.
- W2892772871 cites W3099783338 @default.
- W2892772871 cites W3100516736 @default.
- W2892772871 cites W3101208819 @default.
- W2892772871 cites W3103169227 @default.
- W2892772871 cites W3103553760 @default.
- W2892772871 cites W3103730211 @default.
- W2892772871 cites W3103919686 @default.
- W2892772871 cites W3106352826 @default.
- W2892772871 cites W3121207881 @default.
- W2892772871 cites W3123189375 @default.
- W2892772871 cites W3123244282 @default.
- W2892772871 cites W3123766980 @default.
- W2892772871 doi "https://doi.org/10.1093/mnras/stz1287" @default.
- W2892772871 hasPublicationYear "2019" @default.
- W2892772871 type Work @default.
- W2892772871 sameAs 2892772871 @default.
- W2892772871 citedByCount "41" @default.
- W2892772871 countsByYear W28927728712019 @default.
- W2892772871 countsByYear W28927728712020 @default.
- W2892772871 countsByYear W28927728712021 @default.
- W2892772871 countsByYear W28927728712022 @default.
- W2892772871 countsByYear W28927728712023 @default.
- W2892772871 crossrefType "journal-article" @default.
- W2892772871 hasAuthorship W2892772871A5013594036 @default.
- W2892772871 hasAuthorship W2892772871A5024608470 @default.
- W2892772871 hasAuthorship W2892772871A5058008520 @default.
- W2892772871 hasAuthorship W2892772871A5075884876 @default.
- W2892772871 hasAuthorship W2892772871A5088100194 @default.
- W2892772871 hasBestOaLocation W28927728712 @default.
- W2892772871 hasConcept C117137515 @default.
- W2892772871 hasConcept C121332964 @default.
- W2892772871 hasConcept C1276947 @default.
- W2892772871 hasConcept C135041427 @default.
- W2892772871 hasConcept C161813005 @default.
- W2892772871 hasConcept C165838908 @default.
- W2892772871 hasConcept C166689943 @default.
- W2892772871 hasConcept C21822782 @default.
- W2892772871 hasConcept C23576306 @default.