The SSA22 H i Tomography Survey (SSA22-HIT). I. Data Set and Compiled Redshift Catalog by Ken Mawatari, Akio K. Inoue, Toru Yamada, Tomoki Hayashino, J. Xavier Prochaska, Khee-Gan Lee, Nicolas Tejos, Nobunari Kashikawa, Takuya Otsuka, Satoshi Yamanaka, David J. Schlegel, Yuichi Matsuda, Joseph F. Hennawi, Ikuru Iwata, Hideki Umehata, Shiro Mukae, Masami Ouchi, Yuma Sugahara, Yoichi Tamura

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Searching for the Sources of Excess Extragalactic Dispersion of FRBs by Sunil Simha, Khee-Gan Lee, J. Xavier Prochaska, Ilya S. Khrykin, Yuxin Huang, Nicolas Tejos, Lachlan Marnoch, Metin Ata, Lucas Bernales, Shivani Bhandari, Jeff Cooke, Adam T. Deller, Stuart D. Ryder, Jielai Zhang

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Measuring the Variance of the Macquart Relation in Redshift–Extragalactic Dispersion Measure Modeling by Jay Baptista, J. Xavier Prochaska, Alexandra G. Mannings, C. W. James, R. M. Shannon, Stuart D. Ryder, A. T. Deller, Danica R. Scott, Marcin Glowacki, Nicolas Tejos

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The Bimodal Absorption System Imaging Campaign (BASIC). I. A Dual Population of Low-metallicity Absorbers at z < 1 by Michelle A. Berg, Nicolas Lehner, J. Christopher Howk, John M. O’Meara, Joop Schaye, Lorrie A. Straka, Kathy L. Cooksey, Todd M. Tripp, J. Xavier Prochaska, Benjamin D. Oppenheimer, Sean D. Johnson, Sowgat Muzahid, Rongmon Bordoloi, Jessica K. Werk, Andrew J. Fox, Neal Katz, Martin Wendt, Molly S. Peeples, Joseph Ribaudo, Jason Tumlinson

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The FRB 20190520B Sight Line Intersects Foreground Galaxy Clusters by Khee-Gan Lee, Ilya S. Khrykin, Sunil Simha, Metin Ata, Yuxin Huang, J. Xavier Prochaska, Nicolas Tejos, Jeff Cooke, Kentaro Nagamine, Jielai Zhang

“…Subtracting off their estimated DM contributions, as well that of the diffuse intergalactic medium, we estimate a host contribution of ${{\rm{D}}{\rm{M}}}_{{\rm{h}}{\rm{o}}{\rm{s}}{\rm{t}}}={430}_{-220}^{+140}$ or ${280}_{-170}^{+140}\,{\rm{p}}{\rm{c}}\,{{\rm{c}}{\rm{m}}}^{-3}$ (observed frame), depending on whether we assume that the halo gas extends to r _200 or 2 × r _200 . …”
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A Nonrepeating Fast Radio Burst in a Dwarf Host Galaxy by Shivani Bhandari, Alexa C. Gordon, Danica R. Scott, Lachlan Marnoch, Navin Sridhar, Pravir Kumar, Clancy W. James, Hao Qiu, Keith W. Bannister, Adam T. Deller, Tarraneh Eftekhari, Wen-fai Fong, Marcin Glowacki, J. Xavier Prochaska, Stuart D. Ryder, Ryan M. Shannon, Sunil Simha

“…This redshift is much lower than what would be expected for a source dispersion measure (DM) of 729 pc cm ^−3 , given typical contributions from the intergalactic medium and the host galaxy. Optical observations reveal the host to be a dwarf galaxy with little ongoing star formation—very different to the dwarf host galaxies of the known repeating FRBs 20121102A and 20190520B. …”
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