Polarimetric Properties of Event Horizon Telescope Targets from ALMA
Akiyama Kazunori; Alberdi Antxon; Alef Walter; Algaba Juan Carlos; Anantua Richard; Asada Keiichi; Azulay Rebecca; Baczko Anne-Kathrin; Ball David; Baloković Mislav; Barrett John; Benson Bradford A.; Bintley Dan; Blackburn Lindy; Blundell Raymond; Boland Wilfred; Bouman Katherine L.; Bower Geoffrey C.; Boyce Hope; Bremer Michael; Brinkerink Christiaan D.; Brissenden Roger; Britzen Silke; Broderick Avery E.; Broguiere Dominique; Bronzwaer Thomas; Bruni Gabriele; Byun Do-Young; Carlstrom John E.; Chael Andrew; Chan Chi-kwan; Chatterjee Koushik; Chatterjee Shami; Chen Ming-Tang; Chen Yongjun; Chesler Paul M.; Cho Ilje; Christian Pierre; Conway John E.; Cordes James M.; Crawford Thomas M.; Crew Geoffrey B.; Cruz-Osorio Alejandro; Cui Yuzhu; Davelaar Jordy; De Laurentis Mariafelicia; Deane Roger; Dempsey Jessica; Desvignes Gregory; Dexter Jason; Doeleman Sheperd S.; Eatough Ralph P.; Falcke Heino; Farah Joseph; Fish Vincent L.; Fomalont Ed; Ford H. Alyson; Fraga-Encinas Raquel; Freeman William T.; Friberg Per; Fromm Christian M.; Fuentes Antonio; Galison Peter; Gammie Charles F.; García Roberto; Gentaz Olivier; Georgiev Boris; Goddi Ciriaco; Gold Roman; Gopakumar A.; Gu Minfeng; Gurwell Mark; Gómez José L.; Gómez-Ruiz Arturo I.; Hada Kazuhiro; Haggard Daryl; Hecht Michael H.; Hernández-Gómez Antonio; Herrero-Illana Ruben; Hesper Ronald; Ho Luis C.; Ho Paul; Honma Mareki; Huang Chih-Wei L.; Huang Lei; Hughes David H.; Impellizzeri C. M. Violette; Ingram Adam; Inoue Makoto; Issaoun Sara; James David J.; Jannuzi Buell T.; Janssen Michael; Jeter Britton; Jiang Wu; Jimenez-Rosales Alejandra; Johnson Michael D.; Jorstad Svetlana; Jung Taehyun; Kadler Matthias; Karami Mansour; Karuppusamy Ramesh; Kawashima Tomohisa; Keating Garrett K.; Kettenis Mark; Kim Dong-Jin; Kim Jae-Young; Kim Jongsoo; Kim Junhan; Kino Motoki; Koay Jun Yi; Koch Patrick M.; Kofuji Yutaro; Komossa S.; Kovalev Y. Y.; Koyama Shoko; Kramer Carsten; Kramer Michael; Krichbaum Thomas P.; Kuo Cheng-Yu; Lauer Tod R.; Lee Sang-Sung; Levis Aviad; Li Yan-Rong; Li Zhiyuan; Lico Rocco; Lindahl Greg; Lindqvist Michael; Liu Jun; Liu Kuo; Liuzzo Elisabetta; Lo Wen-Ping; Lobanov Andrei P.; Loinard Laurent; Lonsdale Colin; Lu Ru-Sen; MacDonald Nicholas R.; Mao Jirong; Marchili Nicola; Markoff Sera; Marrone Daniel P.; Marscher Alan P.; Martí-Vidal Iván; Matsushita Satoki; Matthews Lynn D.; Medeiros Lia; Mejías Alejandro Mus; Menten Karl M.; Messias Hugo; Mizuno Izumi; Mizuno Yosuke; Moran James M.; Moriyama Kotaro; Moscibrodzka Monika; Muders Dirk; Musoke Gibwa; Müller Cornelia; Nagai Hiroshi; Nagar Neil M.; Nakamura Masanori; Narayan Ramesh; Narayanan Gopal; Natarajan Iniyan; Nathanail Antonios; Neilsen Joey; Neri Roberto; Ni Chunchong; Noutsos Aristeidis; Nowak Michael A.; Okino Hiroki; Olivares Héctor; Ortiz-León Gisela N.; Oyama Tomoaki; Palumbo Daniel C. M.; Park Jongho; Patel Nimesh; Pen Ue-Li; Perucho Manel; Pesce Dominic W.; Piétu Vincent; Plambeck Richard; PopStefanija Aleksandar; Porth Oliver; Prather Ben; Preciado-López Jorge A.; Psaltis Dimitrios; Pu Hung-Yi; Pötzl Felix M.; Ramakrishnan Venkatessh; Rao Ramprasad; Rawlings Mark G.; Raymond Alexander W.; Rezzolla Luciano; Ricarte Angelo; Ripperda Bart; Roelofs Freek; Rogers Alan; Ros Eduardo; Rose Mel; Roshanineshat Arash; Rottmann Helge; Roy Alan L.; Ruszczyk Chet; Rygl Kazi L. J.; Rösch Florian; Sasada Mahito; Savolainen Tuomas; Schloerb F. Peter; Schuster Karl-Friedrich; Shao Lijing; Shen Zhiqiang; Small Des; Sohn Bong Won; SooHoo Jason; Sun He; Sánchez Salvador; Sánchez-Arguelles David; Tazaki Fumie; Tetarenko Alexandra J.; Tiede Paul; Tilanus Remo P. J.; Titus Michael; Toma Kenji; Torne Pablo; Traianou Efthalia; Trent Tyler; Trippe Sascha; Valtonen Mauri; Wagner Jan; Ward-Thompson Derek; Wardle John; Weintroub Jonathan; Wex Norbert; Wharton Robert; Wielgus Maciek; Wong George N.; Wu Qingwen; Yoon Doosoo; Young André; Young Ken; Younsi Ziri; Yuan Feng; Yuan Ye-Fei; Zensus J. Anton; Zhao Guang-Yao; Zhao Shan-Shan; van Bemmel Ilse; van Langevelde Huib Jan; van Rossum Daniel R.; Özel Feryal
https://urn.fi/URN:NBN:fi-fe2022012710771
Tiivistelmä
We present the results from a full polarization study carried out with the Atacama Large Millimeter/submillimeter Array (ALMA) during the first Very Long Baseline Interferometry (VLBI) campaign, which was conducted in 2017 April in the λ3 mm and λ1.3 mm bands, in concert with the Global mm-VLBI Array (GMVA) and the Event Horizon Telescope (EHT), respectively. We determine the polarization and Faraday properties of all VLBI targets, including Sgr A*, M87, and a dozen radio-loud active galactic nuclei (AGNs), in the two bands at several epochs in a time window of 10 days. We detect high linear polarization fractions (2%-15%) and large rotation measures (RM > 103.3-105.5 rad m-2), confirming the trends of previous AGN studies at millimeter wavelengths. We find that blazars are more strongly polarized than other AGNs in the sample, while exhibiting (on average) order-of-magnitude lower RM values, consistent with the AGN viewing angle unification scheme. For Sgr A* we report a mean RM of (-4.2 0.3) x 105 rad m-2 at 1.3 mm, consistent with measurements over the past decade and, for the first time, an RM of (-2.1 0.1) x 105 rad m-2 at 3 mm, suggesting that about half of the Faraday rotation at 1.3 mm may occur between the 3 mm photosphere and the 1.3 mm source. We also report the first unambiguous measurement of RM toward the M87 nucleus at millimeter wavelengths, which undergoes significant changes in magnitude and sign reversals on a one year timescale, spanning the range from -1.2 to 0.3 x 105 rad m-2 at 3 mm and -4.1 to 1.5 x 105 rad m-2 at 1.3 mm. Given this time variability, we argue that, unlike the case of Sgr A*, the RM in M87 does not provide an accurate estimate of the mass accretion rate onto the black hole. We put forward a two-component model, comprised of a variable compact region and a static extended region, that can simultaneously explain the polarimetric properties observed by both the EHT (on horizon scales) and ALMA (which observes the combined emission from both components). These measurements provide critical constraints for the calibration, analysis, and interpretation of simultaneously obtained VLBI data with the EHT and GMVA.
Kokoelmat
- Rinnakkaistallenteet [19207]
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First Sagittarius A* Event Horizon Telescope Results. III. Imaging of the Galactic Center Supermassive Black Hole
Akiyama Kazunori; Alberdi Antxon; Alef Walter; Algaba Juan Carlos; Anantua Richard; Asada Keiichi; Azulay Rebecca; Bach Uwe; Baczko Anne-Kathrin; Ball David; Baloković Mislav; Barrett John; Bauböck Michi; Benson Bradford A.; Bintley Dan; Blackburn Lindy; Blundell Raymond; Bouman Katherine L.; Bower Geoffrey C.; Boyce Hope; Bremer Michael; Brinkerink Christiaan D.; Brissenden Roger; Britzen Silke; Broderick Avery E.; Broguiere Dominique; Bronzwaer Thomas; Bustamante Sandra; Byun Do-Young; Carlstrom John E.; Ceccobello Chiara; Chael Andrew; Chan Chi-kwan; Chatterjee Koushik; Chatterjee Shami; Chen Ming-Tang; Chen Yongjun; Cheng Xiaopeng; Cho Ilje; Christian Pierre; Conroy Nicholas S.; Conway John E.; Cordes James M.; Crawford Thomas M.; Crew Geoffrey B.; Cruz-Osorio Alejandro; Cui Yuzhu; Davelaar Jordy; De Laurentis Mariafelicia; Deane Roger; Dempsey Jessica; Desvignes Gregory; Dexter Jason; Dhruv Vedant; Doeleman Sheperd S.; Dougal Sean; Dzib Sergio A.; Eatough Ralph P.; Emami Razieh; Event Horizon Telescope Collaboration; Falcke Heino; Farah Joseph; Fish Vincent L.; Fomalont Ed; Ford H. Alyson; Fraga-Encinas Raquel; Freeman William T.; Friberg Per; Fromm Christian M.; Fuentes Antonio; Galison Peter; Gammie Charles F.; García Roberto; Gentaz Olivier; Georgiev Boris; Goddi Ciriaco; Gold Roman; Gu Minfeng; Gurwell Mark; Gómez José L.; Gómez-Ruiz Arturo I.; Hada Kazuhiro; Haggard Daryl; Haworth Kari; Hecht Michael H.; Hesper Ronald; Heumann Dirk; Ho Luis C.; Ho Paul; Honma Mareki; Huang Chih-Wei L.; Huang Lei; Hughes David H.; Ikeda Shiro; Impellizzeri C. M. Violette; Inoue Makoto; Issaoun Sara; James David J.; Jannuzi Buell T.; Janssen Michael; Jeter Britton; Jiang Wu; Jiménez-Rosales Alejandra; Johnson Michael D.; Jorstad Svetlana; Joshi Abhishek V.; Jung Taehyun; Karami Mansour; Karuppusamy Ramesh; Kawashima Tomohisa; Keating Garrett K.; Kettenis Mark; Kim Dong-Jin; Kim Jae-Young; Kim Jongsoo; Kim Junhan; Kino Motoki; Koay Jun Yi; Koch Patrick M.; Kocherlakota Prashant; Kofuji Yutaro; Koyama Shoko; Kramer Carsten; Kramer Michael; Krichbaum Thomas P.; Kuo Cheng-Yu; La Bella Noemi; Lauer Tod R.; Lee Daeyoung; Lee Sang-Sung; Leung Po Kin; Levis Aviad; Li Zhiyuan; Lico Rocco; Lindahl Greg; Lindqvist Michael; Lisakov Mikhail; Liu Jun; Liu Kuo; Liuzzo Elisabetta; Lo Wen-Ping; Lobanov Andrei P.; Loinard Laurent; Lonsdale Colin J.; Lu Ru-Sen; Mao Jirong; Marchili Nicola; Markoff Sera; Marrone Daniel P.; Marscher Alan P.; Martí-Vidal Iván; Matsushita Satoki; Matthews Lynn D.; Medeiros Lia; Menten Karl M.; Michalik Daniel; Mizuno Izumi; Mizuno Yosuke; Moran James M.; Moriyama Kotaro; Moscibrodzka Monika; Mus Alejandro; Musoke Gibwa; Myserlis Ioannis; Müller Cornelia; Nadolski Andrew; Nagai Hiroshi; Nagar Neil M.; Nakamura Masanori; Narayan Ramesh; Narayanan Gopal; Natarajan Iniyan; Nathanail Antonios; Navarro Fuentes Santiago; Neilsen Joey; Neri Roberto; Ni Chunchong; Noutsos Aristeidis; Nowak Michael A.; Oh Junghwan; Okino Hiroki; Olivares Héctor; Ortiz-León Gisela N.; Oyama Tomoaki; Palumbo Daniel C. M.; Paraschos Georgios Filippos; Park Jongho; Parsons Harriet; Patel Nimesh; Pen Ue-Li; Pesce Dominic W.; Piétu Vincent; Plambeck Richard; PopStefanija Aleksandar; Porth Oliver; Prather Ben; Preciado-López Jorge A.; Psaltis Dimitrios; Pu Hung-Yi; Pötzl Felix M.; Ramakrishnan Venkatessh; Rao Ramprasad; Rawlings Mark G.; Raymond Alexander W.; Rezzolla Luciano; Ricarte Angelo; Ripperda Bart; Roelofs Freek; Rogers Alan; Romero-Cañizales Cristina; Ros Eduardo; Roshanineshat Arash; Rottmann Helge; Roy Alan L.; Ruiz Ignacio; Ruszczyk Chet; Rygl Kazi L. J.; Sasada Mahito; Satapathy Kaushik; Savolainen Tuomas; Schloerb F. Peter; Schonfeld Jonathan; Schuster Karl-Friedrich; Shao Lijing; Shen Zhiqiang; Small Des; Sohn Bong Won; SooHoo Jason; Souccar Kamal; Sun He; Sánchez Salvador; Sánchez-Argüelles David; Sánchez-Portal Miguel; Tazaki Fumie; Tetarenko Alexandra J.; Tiede Paul; Tilanus Remo P. J.; Titus Michael; Torne Pablo; Traianou Efthalia; Trent Tyler; Trippe Sascha; Turk Matthew; Vos Jesse; Wagner Jan; Ward-Thompson Derek; Wardle John; Weintroub Jonathan; Wex Norbert; Wharton Robert; Wielgus Maciek; Wiik Kaj; Witzel Gunther; Wondrak Michael F.; Wong George N.; Wu Qingwen; Yamaguchi Paul; Yoon Doosoo; Young André; Young Ken; Younsi Ziri; Yuan Feng; Yuan Ye-Fei; Zensus J. Anton; Zhang Shuo; Zhao Guang-Yao; Zhao Shan-Shan; van Bemmel Ilse; van Langevelde Huib Jan; van Rossum Daniel R.; Özel Feryal<p>We present the first event-horizon-scale images and spatiotemporal analysis of Sgr A* taken with the Event Horizon Telescope in 2017 April at a wavelength of 1.3 mm. Imaging of Sgr A* has been conducted through surveys ... -
Millimeter Light Curves of Sagittarius A* Observed during the 2017 Event Horizon Telescope Campaign
Akiyama Kazunori; Alberdi Antxon; Alef Walter; Algaba Juan Carlos; Anantua Richard; Asada Keiichi; Azulay Rebecca; Bach Uwe; Baczko Anne-Kathrin; Ball David; Baloković Mislav; Barrett John; Bauböck Michi; Benson Bradford A.; Bintley Dan; Blackburn Lindy; Blundell Raymond; Boland Wilfred; Bouman Katherine L.; Bower Geoffrey C.; Boyce Hope; Bremer Michael; Brinkerink Christiaan D.; Brissenden Roger; Britzen Silke; Broderick Avery E.; Broguiere Dominique; Bronzwaer Thomas; Bustamante Sandra; Byun Do-Young; Carlstrom John E.; Ceccobello Chiara; Chael Andrew; Chan Chi-kwan; Chatterjee Koushik; Chatterjee Shami; Chen Ming-Tang; Chen Yongjun; Chesler Paul M.; Cho Ilje; Christian Pierre; Conroy Nicholas S.; Conway John E.; Cordes James M.; Crawford Thomas M.; Crew Geoffrey B.; Cruz-Osorio Alejandro; Cui Yuzhu; Davelaar Jordy; De Laurentis Mariafelicia; Deane Roger; Dempsey Jessica; Desvignes Gregory; Dexter Jason; Dhruv Vedant; Doeleman Sheperd S.; Dzib Sergio A.; Eatough Ralph P.; Emami Razieh; Falcke Heino; Farah Joseph; Fish Vincent L.; Fomalont Ed; Ford H. Alyson; Fraga-Encinas Raquel; Freeman William T.; Friberg Per; Fromm Christian M.; Fuentes Antonio; Galison Peter; Gammie Charles F.; García Roberto; Gentaz Olivier; Georgiev Boris; Goddi Ciriaco; Gold Roman; Gu Minfeng; Gurwell Mark; Gómez José L.; Gómez-Ruiz Arturo I.; Hada Kazuhiro; Haggard Daryl; Haworth Kari; Hecht Michael H.; Hesper Ronald; Ho Luis C.; Ho Paul; Honma Mareki; Huang Chih-Wei L.; Huang Lei; Hughes David H.; Ikeda Shiro; Impellizzeri C. M. Violette; Inoue Makoto; Issaoun Sara; James David J.; Jannuzi Buell T.; Janssen Michael; Jeter Britton; Jiang Wu; Jiménez-Rosales Alejandra; Johnson Michael D.; Jorstad Svetlana; Joshi Abhishek V.; Jung Taehyun; Karami Mansour; Karuppusamy Ramesh; Kawashima Tomohisa; Keating Garrett K.; Kettenis Mark; Kim Dong-Jin; Kim Jae-Young; Kim Jongsoo; Kim Junhan; Kino Motoki; Koay Jun Yi; Koch Patrick M.; Kocherlakota Prashant; Kofuji Yutaro; Koyama Shoko; Kramer Carsten; Kramer Michael; Krichbaum Thomas P.; Kuo Cheng-Yu; La Bella Noemi; Lauer Tod R.; Lee Daeyoung; Lee Sang-Sung; Leung Po Kin; Levis Aviad; Li Zhiyuan; Lico Rocco; Lindahl Greg; Lindqvist Michael; Lisakov Mikhail; Liu Jun; Liu Kuo; Liuzzo Elisabetta; Lo Wen-Ping; Lobanov Andrei P.; Loinard Laurent; Lonsdale Colin; Lu Ru-Sen; Mao Jirong; Marchili Nicola; Markoff Sera; Marrone Daniel P.; Marscher Alan P.; Martí-Vidal Iván; Matsushita Satoki; Matthews Lynn D.; Medeiros Lia; Menten Karl M.; Michalik Daniel; Mizuno Izumi; Mizuno Yosuke; Moran James M.; Moriyama Kotaro; Moscibrodzka Monika; Mus Alejandro; Musoke Gibwa; Myserlis Ioannis; Müller Cornelia; Nadolski Andrew; Nagai Hiroshi; Nagar Neil M.; Nakamura Masanori; Narayan Ramesh; Narayanan Gopal; Natarajan Iniyan; Nathanail Antonios; Navarro Fuentes Santiago; Neilsen Joey; Neri Roberto; Ni Chunchong; Noutsos Aristeidis; Nowak Michael A.; Oh Junghwan; Okino Hiroki; Olivares Héctor; Ortiz-León Gisela N.; Oyama Tomoaki; Palumbo Daniel C. M.; Paraschos Georgios Filippos; Park Jongho; Parsons Harriet; Patel Nimesh; Pen Ue-Li; Pesce Dominic W.; Piétu Vincent; Plambeck Richard; PopStefanija Aleksandar; Porth Oliver; Prather Ben; Preciado-López Jorge A.; Psaltis Dimitrios; Pu Hung-Yi; Pötzl Felix M.; Ramakrishnan Venkatessh; Rao Ramprasad; Rawlings Mark G.; Raymond Alexander W.; Rezzolla Luciano; Ricarte Angelo; Ripperda Bart; Roelofs Freek; Rogers Alan; Romero-Canizales Cristina; Ros Eduardo; Roshanineshat Arash; Rottmann Helge; Roy Alan L.; Ruiz Ignacio; Ruszczyk Chet; Rygl Kazi L. J.; Sasada Mahito; Satapathy Kaushik; Savolainen Tuomas; Schloerb F. Peter; Schuster Karl-Friedrich; Shao Lijing; Shen Zhiqiang; Small Des; Sohn Bong Won; SooHoo Jason; Souccar Kamal; Sun He; Sánchez Salvador; Sánchez-Argüelles David; Sánchez-Portal Miguel; Tazaki Fumie; Tetarenko Alexandra J.; Tiede Paul; Tilanus Remo P. J.; Titus Michael; Torne Pablo; Traianou Efthalia; Trent Tyler; Trippe Sascha; Vos Jesse; Wagner Jan; Ward-Thompson Derek; Wardle John; Weintroub Jonathan; Wex Norbert; Wharton Robert; Wielgus Maciek; Wiik Kaj; Witzel Gunther; Wondrak Michael F.; Wong George N.; Wu Qingwen; Yamaguchi Paul; Yoon Doosoo; Young André; Young Ken; Younsi Ziri; Yuan Feng; Yuan Ye-Fei; Zensus J. Anton; Zhang Shuo; Zhao Guang-Yao; Zhao Shan-Shan; van Bemmel Ilse; van Langevelde Huib Jan; van Rossum Daniel R.; Özel Feryal<p>The Event Horizon Telescope (EHT) observed the compact radio source, Sagittarius A* (Sgr A*), in the Galactic Center on 2017 April 5-11 in the 1.3 mm wavelength band. At the same time, interferometric array data from ... -
Resolving the Inner Parsec of the Blazar J1924-2914 with the Event Horizon Telescope
Akiyama Kazunori; Alberdi Antxon; Alef Walter; Algaba Juan Carlos; Anantua Richard; Asada Keiichi; Azulay Rebecca; Bach Uwe; Baczko Anne-Kathrin; Ball David; Baloković Mislav; Barrett John; Bauböck Michi; Benson Bradford A.; Bintley Dan; Blackburn Lindy; Blundell Raymond; Boland Wilfred; Bouman Katherine L.; Bower Geoffrey C.; Boyce Hope; Bremer Michael; Brinkerink Christiaan D.; Brissenden Roger; Britzen Silke; Broderick Avery E.; Broguiere Dominique; Bronzwaer Thomas; Bustamante Sandra; Byun Do-Young; Carlstrom John E.; Ceccobello Chiara; Chael Andrew; Chan Chi-kwan; Chatterjee Koushik; Chatterjee Shami; Chen Ming-Tang; Chen Yongjun; Cho Ilje; Christian Pierre; Conroy Nicholas S.; Conway John E.; Cordes James M.; Crawford Thomas M.; Crew Geoffrey B.; Cruz-Osorio Alejandro; Cui Yuzhu; Davelaar Jordy; De Laurentis Mariafelicia; Deane Roger; Dempsey Jessica; Desvignes Gregory; Dexter Jason; Dhruv Vedant; Doeleman Sheperd S.; Eatough Ralph P.; Emami Razieh; Falcke Heino; Farah Joseph; Fish Vincent L.; Fomalont Ed; Ford H. Alyson; Fraga-Encinas Raquel; Freeman William T.; Friberg Per; Fromm Christian M.; Fuentes Antonio; Galison Peter; Gammie Charles F.; García Roberto; Gentaz Olivier; Georgiev Boris; Goddi Ciriaco; Gold Roman; Gu Minfeng; Gurwell Mark; Gómez José L.; Gómez-Ruiz Arturo I.; Hada Kazuhiro; Haggard Daryl; Hecht Michael H.; Hesper Ronald; Ho Luis C.; Ho Paul; Honma Mareki; Huang Chih-Wei L.; Huang Lei; Hughes David H.; Ikeda Shiro; Impellizzeri C. M. Violette; Inoue Makoto; Issaoun Sara; James David J.; Jannuzi Buell T.; Janssen Michael; Jeter Britton; Jiang Wu; Jimenez-Rosales Alejandra; Johnson Michael D.; Jorstad Svetlana; Joshi Abhishek V.; Jung Taehyun; Karami Mansour; Karuppusamy Ramesh; Kawashima Tomohisa; Keating Garrett K.; Kettenis Mark; Kim Dong-Jin; Kim Jae-Young; Kim Jongsoo; Kim Junhan; Kino Motoki; Koay Jun Yi; Koch Patrick M.; Kocherlakota Prashant; Kofuji Yutaro; Koyama Shoko; Kramer Carsten; Kramer Michael; Krichbaum Thomas P.; Kuo Cheng-Yu; La Bella Noemi; Lauer Tod R.; Lee Daeyoung; Lee Sang-Sung; Leung Po Kin; Levis Aviad; Li Zhiyuan; Lico Rocco; Lindahl Greg; Lindqvist Michael; Lisakov Mikhail; Liu Jun; Liu Kuo; Liuzzo Elisabetta; Lo Wen-Ping; Lobanov Andrei P.; Loinard Laurent; Lonsdale Colin; Lu Ru-Sen; MacDonald Nicholas R.; Mao Jirong; Marchili Nicola; Markoff Sera; Marrone Daniel P.; Marscher Alan P.; Martí-Vidal Iván; Matsushita Satoki; Matthews Lynn D.; Medeiros Lia; Menten Karl M.; Michalik Daniel; Mizuno Izumi; Mizuno Yosuke; Moran James M.; Moriyama Kotaro; Mościbrodzka Monika; Mus Alejandro; Musoke Gibwa; Myserlis Ioannis; Müller Cornelia; Nadolski Andrew; Nagai Hiroshi; Nagar Neil M.; Nakamura Masanori; Narayan Ramesh; Narayanan Gopal; Natarajan Iniyan; Nathanail Antonios; Neilsen Joey; Neri Roberto; Ni Chunchong; Noutsos Aristeidis; Nowak Michael A.; Oh Junghwan; Okino Hiroki; Olivares Héctor; Ortiz-León Gisela N.; Oyama Tomoaki; Palumbo Daniel C. M.; Paraschos Georgios Filippos; Park Jongho; Parsons Harriet; Patel Nimesh; Pen Ue-Li; Pesce Dominic W.; Piétu Vincent; Plambeck Richard; PopStefanija Aleksandar; Porth Oliver; Prather Ben; Preciado-López Jorge A.; Psaltis Dimitrios; Pu Hung-Yi; Pötzl Felix M.; Quijano Sergio Abraham Dzib; Ramakrishnan Venkatessh; Rao Ramprasad; Rawlings Mark G.; Raymond Alexander W.; Rezzolla Luciano; Ricarte Angelo; Ripperda Bart; Roelofs Freek; Rogers Alan; Romero-Canizales Cristina; Ros Eduardo; Roshanineshat Arash; Rottmann Helge; Roy Alan L.; Ruiz Ignacio; Ruszczyk Chet; Rygl Kazi L. J.; Sanchez-Portal Miguel; Sasada Mahito; Satapathy Kaushik; Savolainen Tuomas; Schloerb F. Peter; Schuster Karl-Friedrich; Shao Lijing; Shen Zhiqiang; Small Des; Sohn Bong Won; SooHoo Jason; Souccar Kamal; Sun He; Sánchez Salvador; Sánchez-Arguelles David; Tazaki Fumie; Tetarenko Alexandra J.; Tiede Paul; Tilanus Remo P. J.; Titus Michael; Torne Pablo; Traianou Efthalia; Trent Tyler; Trippe Sascha; Vos Jesse; Wagner Jan; Ward-Thompson Derek; Wardle John; Weintroub Jonathan; Wex Norbert; Wharton Robert; Wielgus Maciek; Wiik Kaj; Witzel Gunther; Wondrak Michael; Wong George N.; Wu Qingwen; Yamaguchi Paul; Yoon Doosoo; Young André; Young Ken; Younsi Ziri; Yuan Feng; Yuan Ye-Fei; Zensus J. Anton; Zhang Shuo; Zhao Guang-Yao; Zhao Shan-Shan; van Bemmel Ilse; van Langevelde Huib Jan; van Rossum Daniel R.; Özel FeryalThe blazar J1924-2914 is a primary Event Horizon Telescope (EHT) calibrator for the Galactic center's black hole Sagittarius A*. Here we present the first total and linearly polarized intensity images of this source obtained ...