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1. TOI-2285b: A 1.7 Earth-radius planet near the habitable zone around a nearby M dwarf

Author

Fukui, Akihiko, Kimura, Tadahiro, Hirano, Teruyuki, Narita, Norio, Kodama, Takanori, Hori, Yasunori, Ikoma, Masahiro, Pallé, Enric, Murgas, Felipe, Parviainen, Hannu, Kawauchi, Kiyoe, Mori, Mayuko, Esparza-Borges, Emma, Bieryla, Allyson, Irwin, Jonathan, Safonov, Boris S, Stassun, Keivan G, Alvarez-Hernandez, Leticia, Béjar, Víctor J S, Casasayas-Barris, Núria, Chen, Guo, Crouzet, Nicolas, de Leon, Jerome P, Isogai, Keisuke, Kagetani, Taiki, Klagyivik, Peter, Korth, Judith, Kurita, Seiya, Kusakabe, Nobuhiko, Livingston, John, Luque, Rafael, Madrigal-Aguado, Alberto, Morello, Giuseppe, Nishiumi, Taku, Orell-Miquel, Jaume, Oshagh, Mahmoudreza, Sánchez-Benavente, Manuel, Stangret, Monika, Terada, Yuka, Watanabe, Noriharu, Zou, Yujie, Tamura, Motohide, Kurokawa, Takashi, Kuzuhara, Masayuki, Nishikawa, Jun, Omiya, Masashi, Vievard, Sébastien, Ueda, Akitoshi, Latham, David W, Quinn, Samuel N, Strakhov, Ivan S, Belinski, Alexandr A, Jenkins, Jon M, Ricker, George R, Seager, Sara, Vanderspek, Roland, Winn, Joshua N, Charbonneau, David, Ciardi, David R, Collins, Karen A, Doty, John P, Bachelet, Etienne, and Harbeck, Daniel

Abstract

We report the discovery of TOI-2285b, a sub-Neptune-sized planet transiting a nearby (42 pc) M dwarf with a period of 27.3 d. We identified the transit signal from the Transiting Exoplanet Survey Satellite photometric data, which we confirmed with ground-based photometric observations using the multiband imagers MuSCAT2 and MuSCAT3. Combining these data with other follow-up observations including high-resolution spectroscopy with the Tillinghast Reflector Echelle Spectrograph, high-resolution imaging with the SPeckle Polarimeter, and radial velocity (RV) measurements with the InfraRed Doppler instrument, we find that the planet has a radius of $1.74 \pm 0.08\, R_\oplus$, a mass of $\lt \!\!19.5\,M_\oplus$($95\%$c.l.), and an insolation flux of 1.54 ± 0.14 times that of the Earth. Although the planet resides just outside the habitable zone for a rocky planet, if the planet harbors an H2O layer under a hydrogen-rich atmosphere, then liquid water could exist on the surface of the H2O layer depending on the planetary mass and water mass fraction. The bright host star in the near-infrared (Ks= 9.0) makes this planet an excellent target for further RV and atmospheric observations to improve our understanding of the composition, formation, and habitability of sub-Neptune-sized planets.

Published
2022
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2. Impact of Chemoprophylaxis on Thromboembolism Following Operative Fixation of Pelvic Fractures

Author

Berning, Bennett J., Magnotti, Louis J., Lewis, Richard H., Corley, Catherine E., Lim, Garrett H., Doty, John B., Fabian, Timothy C., Croce, Martin A., and Sharpe, John P.

Abstract

Background Venous thromboembolism (VTE) is a common cause of serious morbidity and mortality. While chemoprophylaxis decreases VTE, there is the theoretical risk of increased hemorrhagic complications. The purpose of this study was to evaluate the impact of preoperative anticoagulation on VTE and bleeding complications in patients with blunt pelvic fractures requiring operative fixation.Methods Patients with blunt pelvic fractures requiring operative fixation over 10.5 years were identified. Patients were stratified by age, severity of shock, operative management, and timing and duration of anticoagulation. Outcomes were evaluated to determine risk factors for bleeding complications and VTE.Results 310 patients were identified: 212 patients received at least one dose of preoperative anticoagulation and 98 received no preoperative anticoagulation. 68% were male with a mean injury severity score and Glasgow Coma Scale of 26 and 13, respectively. Bleeding complications occurred in 24 patients and 21 patients suffered VTE. Patients with VTE had a greater initial severity of shock (resuscitation transfusions, 4 vs. 2 units, P= .02). Despite longer time to mobilization (4 vs. 3 days, P= .001), patients who received their scheduled preoperative doses within 48 hours of arrival had no significant differences in the number of deep vein thrombosis events (5.2% vs. 5.7%, P= .99), but fewer episodes of pulmonary embolism (PE) (1.5% vs. 6.8%, P= .03) with no difference in bleeding complications (7.5% vs. 8%, P= .87) compared to either patients who had their doses held until after 48 hours of arrival or received no preoperative anticoagulation.Discussion Preoperative anticoagulation prior to pelvic fixation reduced the risk of PE without increasing bleeding complications. Preoperative anticoagulation is safe and beneficial in this group of patients.

Published
2022
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4. Impact of a focused review course in cardiovascular and thoracic surgery on test performance

Author

Doty, John R., Nguyen, Michael, Snyder, Richard J., McCann, Ulysse G., and Doty, Donald B.

Abstract

The Core Curriculum Review Course in Cardiovascular and Thoracic Surgery is a 4-day educational program consisting of 77 didactic lectures that provide a comprehensive review of the material required for surgeons preparing for the American Board of Thoracic Surgery competency written examination. The lectures are supplemented with a written syllabus and interactive audience participation system. We sought to determine whether participation in this course could improve participants' performance on a cardiothoracic subject-based test.

Published
2021
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5. A giant planet candidate transiting a white dwarf

Author

Vanderburg, Andrew, Rappaport, Saul A., Xu, Siyi, Crossfield, Ian J. M., Becker, Juliette C., Gary, Bruce, Murgas, Felipe, Blouin, Simon, Kaye, Thomas G., Palle, Enric, Melis, Carl, Morris, Brett M., Kreidberg, Laura, Gorjian, Varoujan, Morley, Caroline V., Mann, Andrew W., Parviainen, Hannu, Pearce, Logan A., Newton, Elisabeth R., Carrillo, Andreia, Zuckerman, Ben, Nelson, Lorne, Zeimann, Greg, Brown, Warren R., Tronsgaard, René, Klein, Beth, Ricker, George R., Vanderspek, Roland K., Latham, David W., Seager, Sara, Winn, Joshua N., Jenkins, Jon M., Adams, Fred C., Benneke, Björn, Berardo, David, Buchhave, Lars A., Caldwell, Douglas A., Christiansen, Jessie L., Collins, Karen A., Colón, Knicole D., Daylan, Tansu, Doty, John, Doyle, Alexandra E., Dragomir, Diana, Dressing, Courtney, Dufour, Patrick, Fukui, Akihiko, Glidden, Ana, Guerrero, Natalia M., Guo, Xueying, Heng, Kevin, Henriksen, Andreea I., Huang, Chelsea X., Kaltenegger, Lisa, Kane, Stephen R., Lewis, John A., Lissauer, Jack J., Morales, Farisa, Narita, Norio, Pepper, Joshua, Rose, Mark E., Smith, Jeffrey C., Stassun, Keivan G., and Yu, Liang

Abstract

Astronomers have discovered thousands of planets outside the Solar System1, most of which orbit stars that will eventually evolve into red giants and then into white dwarfs. During the red giant phase, any close-orbiting planets will be engulfed by the star2, but more distant planets can survive this phase and remain in orbit around the white dwarf3,4. Some white dwarfs show evidence for rocky material floating in their atmospheres5, in warm debris disks6–9or orbiting very closely10–12, which has been interpreted as the debris of rocky planets that were scattered inwards and tidally disrupted13. Recently, the discovery of a gaseous debris disk with a composition similar to that of ice giant planets14demonstrated that massive planets might also find their way into tight orbits around white dwarfs, but it is unclear whether these planets can survive the journey. So far, no intact planets have been detected in close orbits around white dwarfs. Here we report the observation of a giant planet candidate transiting the white dwarf WD 1856+534 (TIC 267574918) every 1.4 days. We observed and modelled the periodic dimming of the white dwarf caused by the planet candidate passing in front of the star in its orbit. The planet candidate is roughly the same size as Jupiter and is no more than 14 times as massive (with 95 per cent confidence). Other cases of white dwarfs with close brown dwarf or stellar companions are explained as the consequence of common-envelope evolution, wherein the original orbit is enveloped during the red giant phase and shrinks owing to friction. In this case, however, the long orbital period (compared with other white dwarfs with close brown dwarf or stellar companions) and low mass of the planet candidate make common-envelope evolution less likely. Instead, our findings for the WD 1856+534 system indicate that giant planets can be scattered into tight orbits without being tidally disrupted, motivating the search for smaller transiting planets around white dwarfs.

Published
2020
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6. A planet within the debris disk around the pre-main-sequence star AU Microscopii

Author

Plavchan, Peter, Barclay, Thomas, Gagné, Jonathan, Gao, Peter, Cale, Bryson, Matzko, William, Dragomir, Diana, Quinn, Sam, Feliz, Dax, Stassun, Keivan, Crossfield, Ian J. M., Berardo, David A., Latham, David W., Tieu, Ben, Anglada-Escudé, Guillem, Ricker, George, Vanderspek, Roland, Seager, Sara, Winn, Joshua N., Jenkins, Jon M., Rinehart, Stephen, Krishnamurthy, Akshata, Dynes, Scott, Doty, John, Adams, Fred, Afanasev, Dennis A., Beichman, Chas, Bottom, Mike, Bowler, Brendan P., Brinkworth, Carolyn, Brown, Carolyn J., Cancino, Andrew, Ciardi, David R., Clampin, Mark, Clark, Jake T., Collins, Karen, Davison, Cassy, Foreman-Mackey, Daniel, Furlan, Elise, Gaidos, Eric J., Geneser, Claire, Giddens, Frank, Gilbert, Emily, Hall, Ryan, Hellier, Coel, Henry, Todd, Horner, Jonathan, Howard, Andrew W., Huang, Chelsea, Huber, Joseph, Kane, Stephen R., Kenworthy, Matthew, Kielkopf, John, Kipping, David, Klenke, Chris, Kruse, Ethan, Latouf, Natasha, Lowrance, Patrick, Mennesson, Bertrand, Mengel, Matthew, Mills, Sean M., Morton, Tim, Narita, Norio, Newton, Elisabeth, Nishimoto, America, Okumura, Jack, Palle, Enric, Pepper, Joshua, Quintana, Elisa V., Roberge, Aki, Roccatagliata, Veronica, Schlieder, Joshua E., Tanner, Angelle, Teske, Johanna, Tinney, C. G., Vanderburg, Andrew, von Braun, Kaspar, Walp, Bernie, Wang, Jason, Wang, Sharon Xuesong, Weigand, Denise, White, Russel, Wittenmyer, Robert A., Wright, Duncan J., Youngblood, Allison, Zhang, Hui, and Zilberman, Perri

Abstract

AU Microscopii (AU Mic) is the second closest pre-main-sequence star, at a distance of 9.79 parsecs and with an age of 22 million years1. AU Mic possesses a relatively rare2and spatially resolved3edge-on debris disk extending from about 35 to 210 astronomical units from the star4, and with clumps exhibiting non-Keplerian motion5–7. Detection of newly formed planets around such a star is challenged by the presence of spots, plage, flares and other manifestations of magnetic ‘activity’ on the star8,9. Here we report observations of a planet transiting AU Mic. The transiting planet, AU Mic b, has an orbital period of 8.46 days, an orbital distance of 0.07 astronomical units, a radius of 0.4 Jupiter radii, and a mass of less than 0.18 Jupiter masses at 3σconfidence. Our observations of a planet co-existing with a debris disk offer the opportunity to test the predictions of current models of planet formation and evolution.

Published
2020
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7. Electromagnetic Navigation Bronchoscopy for Peripheral Pulmonary Lesions: One-Year Results of the Prospective, Multicenter NAVIGATE Study

Author

Folch, Erik E., Pritchett, Michael A., Nead, Michael A., Bowling, Mark R., Murgu, Septimiu D., Krimsky, William S., Murillo, Boris A., LeMense, Gregory P., Minnich, Douglas J., Bansal, Sandeep, Ellis, Blesilda Q., Mahajan, Amit K., Gildea, Thomas R., Bechara, Rabih I., Sztejman, Eric, Flandes, Javier, Rickman, Otis B., Benzaquen, Sadia, Hogarth, D. Kyle, Linden, Philip A., Wahidi, Momen M., Mattingley, Jennifer S., Hood, Kristin L., Lin, Haiying, Wolvers, Jennifer J., Khandhar, Sandeep J., Anciano, Carlos, Aragaki, Alejandro, Arenberg, Douglas, Awais, Omar, Balestra, Ricardo, Bansal, Sandeep, Barisione, Emanuela, Bechara, Rabih, Benzaquen, Sadia, Bezzi, Michela, Bhadra, Krishnendu, Bird, Julio, Blanco, Alessandro, Bowling, Mark, Cerfolio, Robert, Christensen, Merete, Cicenia, Joseph, Courey, Antony, Doty, John, Eggleston, Kevin, Ellis, Blesilda, Fernandez, Iker, Flandes, Javier, Folch, Erik, Furman, Alexandre, Gass, George David, Gildea, Thomas, Gogineni, Anil, Grabcanovic, Musija Fikreta, Hinze, John David, Hogarth, David Kyle, Karunakara, Raj, Kazakov, Jordan, Khandhar, Sandeep, Khurana, Sandhya, Krimsky, William, Krishna, Ganesh, Krol, Roman, Kropfmüller, Roland, Lamprecht, Bernd, Lau, Kelvin, Lee, Andrew, LeMense, Gregory, Linden, Philip, Lutz, Peter, Mahajan, Amit, Mahmood, Kamran, Maldonado, Fabien, Martinez, Rafael, Mattingley, Jennifer, Minnich, Douglas, Murgu, Septimiu, Murillo, Boris, Nason, Katie, Nead, Michael, Parks, Christopher, Perret, Kenneth, Porsch, Peter, Pritchett, Michael, Rickman, Otis, Rosario, Maydee, Salio, Mario, Sarkar, Saiyad, Seevaratnam, Andrew, Sethi, Sonali, Singh, Jaspal, Studnicka, Michael, Sztejman, Eric, Takubo, Tamejiro, Teba, Catalina, Towe, Christopher, Trigiani, Marco, Vergnon, JeanRichel, Viby, Niels-Erik, Wahidi, Momen, Waller, Ernest, Wei, Benjamin, Zanchi, Dragos, and Zgoda, Michael

Abstract

Electromagnetic navigation bronchoscopy (ENB) is a minimally invasive technology that guides endoscopic tools to pulmonary lesions. ENB has been evaluated primarily in small, single-center studies; thus, the diagnostic yield in a generalizable setting is unknown.

Published
2019
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8. Outcome of the Joint Council of Thoracic Surgery Education’s Early Review Course Project.

Author

Allen, Mark S., Calhoon, John H., Fullerton, David, Shemin, Richard, Naunheim, Keith, Verrier, Edward, Doty, John, and Mathisen, Douglas J.

Abstract

Background The Joint Council on Thoracic Surgical Education was formed in 2008 to improve cardiothoracic education. Resident learning has been a concern as reflected in declining passing rates on the American Board of Thoracic Surgery examinations. The Joint Council on Thoracic Surgical Education piloted a program to determine whether early exposure to a cardiothoracic curriculum through participation in a board review course would improve learning. The purpose of this paper is to report the results of this project. Methods Residents from the incoming classes of traditional 5-2 or 5-3 cardiothoracic training programs were randomly selected to attend a 3-day board review course (University of Utah) in September of their first year. For the 2012 and 2013 classes of cardiothoracic residents, we asked all incoming residents to take the prior spring in-training examination in July of their first year and then take the in-training examination in the spring of their first year. We combined the results of the incoming class of 2012 and 2013 and analyzed the results. Results There were 171 residents who participated in either 2012 or 2013. There were 38 residents (78.9% were men) who attended the board review course and 133 (79.7% men) who did not. Questionnaires completed by the program directors and the residents who took the review course showed a favorable opinion of the program. The number of correct answers on the in-training examination, the percentage correct, and the percentile rank score increased more for the residents who took the review course, but was not statistically significant. When only the general thoracic surgery questions were analyzed, there was a statistically significant increase in the rank change between residents who attended the review course and residents who did not (8.4% increase versus 2.0% decrease, respectively; p = 0.042, Student t test). Conclusions This pilot study established for the first time the baseline level of knowledge of incoming residents assessed by the in-training examination. Participation in a board review type course early in the residency training program may increase learning by cardiothoracic residents, but there was not a clear statistical difference between the two groups. The program was viewed as favorable by both the participating residents and the program directors. [ABSTRACT FROM AUTHOR]

Published
2016
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9. Fast simulation of the NICER instrument

Author

den Herder, Jan-Willem A., Takahashi, Tadayuki, Bautz, Marshall, Doty, John P., Wampler-Doty, Matthew P., Prigozhin, Gregory Y., Okajima, Takashi, Arzoumanian, Zaven, and Gendreau, Keith

Published
2016
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10. NICER instrument detector subsystem: description and performance

Author

den Herder, Jan-Willem A., Takahashi, Tadayuki, Bautz, Marshall, Prigozhin, Gregory, Gendreau, Keith, Doty, John P., Foster, Richard, Remillard, Ronald, Malonis, Andrew, LaMarr, Beverly, Vezie, Michael, Egan, Mark, Villasenor, Jesus, Arzoumanian, Zaven, Baumgartner, Wayne, Scholze, Frank, Laubis, Christian, Krumrey, Michael, and Huber, Alan

Published
2016
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11. The Neutron star Interior Composition Explorer (NICER): design and development

Author

den Herder, Jan-Willem A., Takahashi, Tadayuki, Bautz, Marshall, Gendreau, Keith C., Arzoumanian, Zaven, Adkins, Phillip W., Albert, Cheryl L., Anders, John F., Aylward, Andrew T., Baker, Charles L., Balsamo, Erin R., Bamford, William A., Benegalrao, Suyog S., Berry, Daniel L., Bhalwani, Shiraz, Black, J. Kevin, Blaurock, Carl, Bronke, Ginger M., Brown, Gary L., Budinoff, Jason G., Cantwell, Jeffrey D., Cazeau, Thoniel, Chen, Philip T., Clement, Thomas G., Colangelo, Andrew T., Coleman, Jerry S., Coopersmith, Jonathan D., Dehaven, William E., Doty, John P., Egan, Mark D., Enoto, Teruaki, Fan, Terry W., Ferro, Deneen M., Foster, Richard, Galassi, Nicholas M., Gallo, Luis D., Green, Chris M., Grosh, Dave, Ha, Kong Q., Hasouneh, Monther A., Heefner, Kristofer B., Hestnes, Phyllis, Hoge, Lisa J., Jacobs, Tawanda M., Jørgensen, John L., Kaiser, Michael A., Kellogg, James W., Kenyon, Steven J., Koenecke, Richard G., Kozon, Robert P., LaMarr, Beverly, Lambertson, Mike D., Larson, Anne M., Lentine, Steven, Lewis, Jesse H., Lilly, Michael G., Liu, Kuochia Alice, Malonis, Andrew, Manthripragada, Sridhar S., Markwardt, Craig B., Matonak, Bryan D., Mcginnis, Isaac E., Miller, Roger L., Mitchell, Alissa L., Mitchell, Jason W., Mohammed, Jelila S., Monroe, Charles A., Montt de Garcia, Kristina M., Mulé, Peter D., Nagao, Louis T., Ngo, Son N., Norris, Eric D., Norwood, Dwight A., Novotka, Joseph, Okajima, Takashi, Olsen, Lawrence G., Onyeachu, Chimaobi O., Orosco, Henry Y., Peterson, Jacqualine R., Pevear, Kristina N., Pham, Karen K., Pollard, Sue E., Pope, John S., Powers, Daniel F., Powers, Charles E., Price, Samuel R., Prigozhin, Gregory Y., Ramirez, Julian B., Reid, Winston J., Remillard, Ronald A., Rogstad, Eric M., Rosecrans, Glenn P., Rowe, John N., Sager, Jennifer A., Sanders, Claude A., Savadkin, Bruce, Saylor, Maxine R., Schaeffer, Alexander F., Schweiss, Nancy S., Semper, Sean R., Serlemitsos, Peter J., Shackelford, Larry V., Soong, Yang, Struebel, Jonathan, Vezie, Michael L., Villasenor, Joel S., Winternitz, Luke B., Wofford, George I., Wright, Michael R., Yang, Mike Y., and Yu, Wayne H.

Published
2016
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12. The ASTRO-H (Hitomi) x-ray astronomy satellite

Author

den Herder, Jan-Willem A., Takahashi, Tadayuki, Bautz, Marshall, Takahashi, Tadayuki, Kokubun, Motohide, Mitsuda, Kazuhisa, Kelley, Richard, Ohashi, Takaya, Aharonian, Felix, Akamatsu, Hiroki, Akimoto, Fumie, Allen, Steve, Anabuki, Naohisa, Angelini, Lorella, Arnaud, Keith, Asai, Makoto, Audard, Marc, Awaki, Hisamitsu, Axelsson, Magnus, Azzarello, Philipp, Baluta, Chris, Bamba, Aya, Bando, Nobutaka, Bautz, Marshall, Bialas, Thomas, Blandford, Roger, Boyce, Kevin, Brenneman, Laura, Brown, Greg, Bulbul, Esra, Cackett, Edward, Canavan, Edgar, Chernyakova, Maria, Chiao, Meng, Coppi, Paolo, Costantini, Elisa, de Plaa, Jelle, den Herder, Jan-Willem, DiPirro, Michael, Done, Chris, Dotani, Tadayasu, Doty, John, Ebisawa, Ken, Eckart, Megan, Enoto, Teruaki, Ezoe, Yuichiro, Fabian, Andrew, Ferrigno, Carlo, Foster, Adam, Fujimoto, Ryuichi, Fukazawa, Yasushi, Furuzawa, Akihiro, Galeazzi, Massimiliano, Gallo, Luigi, Gandhi, Poshak, Gilmore, Kirk, Giustini, Margherita, Goldwurm, Andrea, Gu, Liyi, Guainazzi, Matteo, Haas, Daniel, Haba, Yoshito, Hagino, Kouichi, Hamaguchi, Kenji, Harayama, Atsushi, Harrus, Ilana, Hatsukade, Isamu, Hayashi, Takayuki, Hayashi, Katsuhiro, Hayashida, Kiyoshi, Hiraga, Junko, Hirose, Kazuyuki, Hornschemeier, Ann, Hoshino, Akio, Hughes, John, Ichinohe, Yuto, Iizuka, Ryo, Inoue, Yoshiyuki, Inoue, Hajime, Ishibashi, Kazunori, Ishida, Manabu, Ishikawa, Kumi, Ishimura, Kosei, Ishisaki, Yoshitaka, Itoh, Masayuki, Iwata, Naoko, Iyomoto, Naoko, Jewell, Chris, Kaastra, Jelle, Kallman, Timothy, Kamae, Tuneyoshi, Kara, Erin, Kataoka, Jun, Katsuda, Satoru, Katsuta, Junichiro, Kawaharada, Madoka, Kawai, Nobuyuki, Kawano, Taro, Kawasaki, Shigeo, Khangulyan, Dmitry, Kilbourne, Caroline, Kimball, Mark, King, Ashley, Kitaguchi, Takao, Kitamoto, Shunji, Kitayama, Tetsu, Kohmura, Takayoshi, Kosaka, Tatsuro, Koujelev, Alex, Koyama, Katsuji, Koyama, Shu, Kretschmar, Peter, Krimm, Hans, Kubota, Aya, Kunieda, Hideyo, Laurent, Philippe, Lebrun, François, Lee, Shiu-Huang, Leutenegger, Maurice, Limousin, Olivier, Loewenstein, Michael, Long, Knox, Lumb, David, Madejski, Grzegorz, Maeda, Yoshitomo, Maier, Daniel, Makishima, Kazuo, Markevitch, Maxim, Masters, Candace, Matsumoto, Hironori, Matsushita, Kyoko, McCammon, Dan, McGuinness, Daniel, McNamara, Brian, Mehdipour, Missagh, Miko, Joseph, Miller, Jon, Miller, Eric, Mineshige, Shin, Minesugi, Kenji, Mitsuishi, Ikuyuki, Miyazawa, Takuya, Mizuno, Tsunefumi, Mori, Koji, Mori, Hideyuki, Moroso, Franco, Moseley, Harvey, Muench, Theodore, Mukai, Koji, Murakami, Hiroshi, Murakami, Toshio, Mushotzky, Richard, Nagano, Housei, Nagino, Ryo, Nakagawa, Takao, Nakajima, Hiroshi, Nakamori, Takeshi, Nakano, Toshio, Nakashima, Shinya, Nakazawa, Kazuhiro, Namba, Yoshiharu, Natsukari, Chikara, Nishioka, Yusuke, Nobukawa, Masayoshi, Nobukawa, Kumiko, Noda, Hirofumi, Nomachi, Masaharu, O'Dell, Steve, Odaka, Hirokazu, Ogawa, Hiroyuki, Ogawa, Mina, Ogi, Keiji, Ohno, Masanori, Ohta, Masayuki, Okajima, Takashi, Okamoto, Atsushi, Okazaki, Tsuyoshi, Ota, Naomi, Ozaki, Masanobu, Paerels, Frederik, Paltani, Stéphane, Parmar, Arvind, Petre, Robert, Pinto, Ciro, Pohl, Martin, Pontius, James, Porter, F. Scott, Pottschmidt, Katja, Ramsey, Brian, Reynolds, Christopher, Russell, Helen, Safi-Harb, Samar, Saito, Shinya, Sakai, Shin-ichiro, Sakai, Kazuhiro, Sameshima, Hiroaki, Sasaki, Toru, Sato, Goro, Sato, Yoichi, Sato, Kosuke, Sato, Rie, Sawada, Makoto, Schartel, Norbert, Serlemitsos, Peter, Seta, Hiromi, Shibano, Yasuko, Shida, Maki, Shidatsu, Megumi, Shimada, Takanobu, Shinozaki, Keisuke, Shirron, Peter, Simionescu, Aurora, Simmons, Cynthia, Smith, Randall, Sneiderman, Gary, Soong, Yang, Stawarz, Łukasz, Sugawara, Yasuharu, Sugita, Hiroyuki, Sugita, Satoshi, Szymkowiak, Andrew, Tajima, Hiroyasu, Takahashi, Hiromitsu, Takeda, Shin'ichiro, Takei, Yoh, Tamagawa, Toru, Tamura, Takayuki, Tamura, Keisuke, Tanaka, Takaaki, Tanaka, Yasuo, Tanaka, Yasuyuki, Tashiro, Makoto, Tawara, Yuzuru, Terada, Yukikatsu, Terashima, Yuichi, Tombesi, Francesco, Tomida, Hiroshi, Tsuboi, Yohko, Tsujimoto, Masahiro, Tsunemi, Hiroshi, Tsuru, Takeshi, Uchida, Hiroyuki, Uchiyama, Yasunobu, Uchiyama, Hideki, Ueda, Yoshihiro, Ueda, Shutaro, Ueno, Shiro, Uno, Shin'ichiro, Urry, Meg, Ursino, Eugenio, de Vries, Cor, Wada, Atsushi, Watanabe, Shin, Watanabe, Tomomi, Werner, Norbert, Wik, Daniel, Wilkins, Dan, Williams, Brian, Yamada, Takahiro, Yamada, Shinya, Yamaguchi, Hiroya, Yamaoka, Kazutaka, Yamasaki, Noriko, Yamauchi, Makoto, Yamauchi, Shigeo, Yaqoob, Tahir, Yatsu, Yoichi, Yonetoku, Daisuke, Yoshida, Atsumasa, Yuasa, Takayuki, Zhuravleva, Irina, and Zoghbi, Abderahmen

Published
2016
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13. The Soft X-ray Imager (SXI) for the ASTRO-H Mission

Author

Siegmund, Oswald H., Tanaka, Takaaki, Tsunemi, Hiroshi, Hayashida, Kiyoshi, Tsuru, Takeshi G., Dotani, Tadayasu, Nakajima, Hiroshi, Anabuki, Naohisa, Nagino, Ryo, Uchida, Hiroyuki, Nobukawa, Masayoshi, Ozaki, Masanobu, Natsukari, Chikara, Tomida, Hiroshi, Ueda, Shutaro, Kimura, Masashi, Hiraga, Junko S., Kohmura, Takayoshi, Murakami, Hiroshi, Mori, Koji, Yamauchi, Makoto, Hatsukade, Isamu, Nishioka, Yusuke, Bamba, Aya, and Doty, John P.

Published
2015
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14. Lactic Acidosis After Cardiac Transplantation

Author

Nixon, Jennifer L., Kfoury, Abdallah G., McCubrey, Raymond, Brunisholz, Kim, Bair, Tami, Balling, Kyle D., Budge, Deborah, Doty, John, Rasmusson, Brad, Reid, Bruce, Smith, Hildegard, Thomsen, George, Goddard, Mark, and Alharethi, Rami

Abstract

Lactic acidosis (LA) frequently occurs after heart transplantation (HTx). It is hypothesized to be related to inotropic support or metabolic derangements from chronic heart failure. As such, restoring hemodynamic stability with mechanical circulatory support before HTx should mitigate this problem. Our aim was to evaluate the incidence and outcomes of LA after HTx.

Published
2015
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15. Performance of the CryoValve ∗ SG human decellularized pulmonary valve in 342 patients relative to the conventional CryoValve at a mean follow-up of four years.

Author

Brown, John W., Elkins, Ronald C., Clarke, David R., Tweddell, James S., Huddleston, Charles B., Doty, John R., Fehrenbacher, John W., and Takkenberg, Johanna J.M.

Subjects
PULMONARY valve, FOLLOW-up studies (Medicine), IMPLANTED cardiovascular instruments, CONFIDENCE intervals, HEALTH outcome assessment, RETROSPECTIVE studies, RESPIRATORY insufficiency, HEMODYNAMICS
Abstract

Objective: This study compared clinical outcomes of patients receiving CryoValve SG decellularized pulmonary valves with those of patients receiving conventionally processed CryoValve pulmonary valves. Methods: All consecutive patients undergoing Ross procedures and right ventricular outflow tract reconstructions with SG valves at 7 institutions (February 2000–November 2005) were assessed retrospectively (193 Ross procedures, 149 right ventricular outflow tract reconstructions). Patient, procedural, and outcome data were compared with those from 1246 conventional implants (665 Ross procedures, 581 right ventricular outflow tract reconstructions). Hemodynamic function was assessed at latest follow-up. Results: Follow-up was complete for 99% in SG group and 94% in conventional group, with mean follow-ups of 4.0 years (range, 0–6.7 years) for SG and 3.7 years (range, 0–6.7 years) for conventional. Five-year cumulative survivals and freedoms from adverse events were comparable between SG and conventional valves. Among patients undergoing Ross procedures, peak gradient at last follow-up was lower with SG valves (P < .01); no difference was observed in the right ventricular outflow tract reconstruction population. Pulmonary insufficiency was significantly reduced with SG valves in patients undergoing both Ross procedures (P < .01) and right ventricular outflow tract reconstructions (P < .01). Valve type was not a significant predictor of valve-related failure in propensity-adjusted analysis of either procedure. Conclusions: CryoValve SG decellularized pulmonary valves have acceptable clinical outcomes and favorably compare with conventionally processed valves. Improved hemodynamic function observed with SG valves could signify improved long-term outcomes and may be due to the decreased antigenicity of these valves. [Copyright &y& Elsevier]

Published
2010
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16. Effect of work-hour restriction on operative experience in cardiothoracic surgical residency training.

Author

Connors, Rafe C., Doty, John R., Bull, David A., May, Heidi T., Fullerton, David A., and Robbins, Robert C.

Subjects
TRAINING of medical residents, WORKING hours, THORACIC surgery, HEALTH outcome assessment, MEDICAL care, SURGICAL education
Abstract

Objective: Resident work-hour regulations were instituted to improve patient care during resident training. Although initial data have not shown the intended benefit of limiting resident work hours, concern has developed as to whether resident operative experience has significantly decreased since instituting the work-hour restrictions. Methods: Resident operative logs were reviewed for 3 training institutions in the western United States for residents graduating in the years 1999–2007. Residents were divided into pre–work-hour restriction (1999–2002) and post–work-hour restriction (2003–2007) groups. Thoracic, cardiac, and all combined cases were reviewed separately for all residents at yearly intervals. Statistical analysis was subsequently conducted. Results: A total of 37 residents were identified from 3 different programs over the study period. Thoracic cases were lower during the first year of training but increased in the second and third years of training after work-hour restrictions (78 vs 42, 65 vs 72, and 102 vs 138; P = .17, P = .59, and P = .11, respectively). Cardiac cases were substantially lower during each year of training after work-hour restrictions (190 vs 153, 154 vs 108, and 116 vs 76; P = 0.15, P < .0001, and P = .001, respectively). Overall total cases were also lower over all years of residency after work-hour restrictions (251 vs 195, 219 vs 187, and 234 vs 214; P = .03, P = .049, and P = .59, respectively). Conclusions: The overall volume of thoracic surgery cases was not significantly different after the implementation of the 80-hour work-week restriction. The total number of cardiac cases logged was substantially less during the same time period, and therefore as a result, the total number of cases performed after the implementation of the work-hour restrictions was also reduced. Although recent data have not shown an improvement in patient outcomes after restriction of resident work hours, we speculate that in a time of increasingly complex cases, reduction in resident case volumes caused by work-hour restrictions and decreasing cardiac cases might lead to inadequate operative experience. [Copyright &y& Elsevier]

Published
2009
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17. Comparison of standard Maze III and radiofrequency Maze operations for treatment of atrial fibrillation.

Author

Doty, John R., Doty, Donald B., Jones, Kent W., Flores, Jean H., Mensah, Marlene, Reid, Bruce B., Clayson, Stephen E., Snow, Greg, Righter, Emily, and Millar, Roger C.

Subjects
PULMONARY veins, ATRIAL arrhythmias, ATRIAL fibrillation, PULMONARY blood vessels
Abstract

Objective: This study compares clinical results of the standard Maze III operation, a highly effective treatment for atrial fibrillation, to less complex variations of the Maze III operation utilizing unipolar and bipolar radiofrequency ablation and pulmonary vein isolation. Methods: Records were reviewed of 377 patients who had operations for treatment of atrial fibrillation at a single institution over a 10-year period. Standard Maze III was performed in 220 patients, unipolar radiofrequency Maze III in 60, bipolar radiofrequency Maze III in 65, and radiofrequency pulmonary vein isolation in 32. Electrocardiograms were obtained at discharge and 3-, 6-, and 12-month intervals. Chi-square test, logistic regression, and Bayesian theory analyses were performed to determine significant associations between operative procedures and outcomes. Results: Mean age was 65.1 years (range 22-87). There were 13 hospital deaths (3.4%) and 16 deaths during follow-up. Most patients (90.2%, 340/377) had concomitant operations. Electrocardiogram analysis was available in 344 patients at 3 months and 313 patients at 6 months. Freedom from atrial fibrillation at 6 months was superior after standard Maze III compared with radiofrequency modifications. Subanalysis according to surgeon experience demonstrated good results regardless of operative experience. Conclusions: This single-institution experience suggests that the standard Maze III operation is superior to radiofrequency operations for treatment of atrial fibrillation. Radiofrequency modifications of the Maze III operation are also effective treatments for atrial fibrillation and can achieve good results regardless of surgeon experience. [Copyright &y& Elsevier]

Published
2007
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18. Left Atrial Sarcoma: Resection and Repair by Cardiac Autotransplant and In Situ Pericardial Patch.

Author

Doty, Donald B., Doty, John R., Reid, Bruce B., and Anderson, Jeffrey L.

Subjects
TRANSPLANTATION of organs, tissues, etc., SARCOMA, SURGICAL excision, HEART
Abstract

This report demonstrates the method of resection of a left atrial tumor involving the right superior pulmonary vein. The unique features are use of adjacent pericardium as an in situ patch to reconstruct the left atrium when there is no margin of left atrium remaining on the pulmonary veins and cardiac autotransplantation. [Copyright &y& Elsevier]

Published
2006
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20. Determining the Utility of Temporary Pacing Wires After Coronary Artery Bypass Surgery.

Author

Bethea, Brian T., Salazar, Jorge D., Grega, Maura A., Doty, John R., Fitton, Torin P., Alejo, Diane E., Borowicz, Louis M., Gott, Vincent L., Sussman, Marc S., and Baumgartner, William A.

Subjects
CORONARY artery bypass, CORONARY arteries, DATABASES, MEDICAL records
Abstract

Background: Temporary epicardial pacing wires are used routinely after coronary artery bypass graft (CABG) surgery and can cause rare, catastrophic complications. This study''s purpose was to identify patient characteristics predicting the need for pacing after CABG surgery with the potential to limit their utilization. Methods: This prospective observational study involved 290 consecutive patients undergoing CABG at our institution from August 2000 to January 2001. Sixty-eight patients were excluded for the following reasons: off-pump CABG, preoperative pacemaker, no pacing wire placement, or incomplete follow-up. Among the remaining 222 patients, the incidence of pacing during the postoperative period was recorded. Univariate and independent multivariate predictors for postoperative pacing were determined using medical records, the Johns Hopkins Hospital cardiac surgery database and the Society of Thoracic Surgery database. Results: In the postoperative period, 19 of 222 patients (8.6%) required pacing. Univariate analysis identified age, cardiomegaly, preoperative antiarrhythmic therapy, diabetes mellitus, preoperative arrhythmia, inotropic agents leaving the operating room, and pacing initialized at the separation from cardiopulmonary bypass as predictors of the need for postoperative pacing. Only diabetes mellitus, preoperative arrhythmia, and pacing utilized to separate from bypass were found to be significant on multivariate analysis. Using this model, if we exclude the patients with any of these three risk factors, only 2.6% of them would have required pacing. Conclusions: Few patients require temporary epicardial pacing after routine CABG. This study identified specific predictors for postoperative pacing requirements and provides criteria for the selective use of epicardial pacing wires after CABG. [Copyright &y& Elsevier]

Published
2005
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21. Are There Enough Jobs in Cardiothoracic Surgery? The Thoracic Surgery Residents Association Job Placement Survey for Finishing Residents.

Author

Salazar, Jorge D., Lee, Richard, Wheatley, Grayson H., and Doty, John R.

Subjects
SURGERY, SURVEYS, OCCUPATIONAL training, ASSOCIATIONS, institutions, etc.
Abstract

Applications to cardiothoracic surgery training programs have declined. Anecdotal evidence suggests limited job availability for residents completing cardiothoracic training, which may contribute to this decline. This survey sought to document the experience of current, graduating residents.In June 2003, the Thoracic Surgery Residents Association surveyed residents completing accredited cardiothoracic training or additional subspecialization, utilizing a web-based survey hosted by CTSNet. Resident participation was voluntary and anonymous.Of the estimated 140 graduates, 89 responded. The majority were male (91.0%, n = 81), married (80.0%, n = 71), and had children (61.0%, n = 54). Average age was 36.2 years old, and mean educational debt was less than $50K. Of the 89 respondents, 77 initially sought jobs and 12 sought additional training. For residents seeking jobs, 19.5% (n = 15) received no offers and 13 of these ultimately pursued additional training. Acquired jobs were in private (53.0%, n = 34) or academic practice (47.0%, n = 30), with 73.4% (n = 47) involving general thoracic surgery. Most would again choose cardiothoracic surgery as a career (75.5%, n = 67), and 62.0% (n = 55) would again submit the same match list. However, 87.0% (n = 77) believed that the number of trainees should be decreased, 81.0% (n = 72) believed that reimbursement for cardiothoracic surgery is inadequate, and 77.5% (n = 69) believed that excessively low reimbursement will result in restricted access or decreased quality for patients.Most cardiothoracic residents were successful in finding employment after training. A substantial percentage, however, pursued additional training due to lack of job opportunities. Although most finishing residents were satisfied with training and career choice, significant concerns exist regarding job opportunities and compensation. These conditions may lead to difficulty in recruitment to the specialty. [Copyright &y& Elsevier]

Published
2004
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22. Atheroembolism in cardiac surgery.

Author

Doty, John R., Wilentz, Robb E., Salazar, Jorge D., Hruban, Ralph H., and Cameron, Duke E.

Subjects
ATHEROEMBOLISM, CARDIAC surgery, CARDIOVASCULAR diseases, MEDICAL care, DIAGNOSIS
Abstract

: BackgroundAtheroembolism is a recognized complication of cardiac surgery, but its incidence and various outcomes have not been completely described. A retrospective study was undertaken to better characterize the syndrome.: MethodsRecords of 49,377 autopsies and surgical specimens from the Johns Hopkins Hospital between 1973 and 1995 were reviewed. Three hundred twenty-seven patients (0.7%) had an identifiable atheroembolism on histologic examination. Of these patients, 29 (0.2%) had undergone a cardiac surgical procedure within 30 days of autopsy or surgical resection. Patient charts and pathology specimens were reviewed for operative findings, postoperative outcomes, and histology.: ResultsSix of the 29 patients (21%) had atheroembolism to the heart, 7 patients (24%) had embolism to the central nervous system, 19 patients (66%) had embolism to the gastrointestinal tract, 14 patients (48%) had embolism to one or both kidneys, and 5 patients (17%) had embolism to a lower extremity. Sixteen patients (55%) had atheroembolism in two or more areas. In 6 patients (21%), death was directly attributable to atheroembolism, including intraoperative cardiac failure from coronary embolism (n = 3), massive stroke (n = 2), and extensive gastrointestinal embolization (n = 1).: ConclusionsAtheroembolism in cardiac surgery has a broad spectrum of clinical presentations, including devastating injuries and death. Although the true incidence is probably underestimated in this retrospective study, the high attendant mortality and morbidity of atheroembolism have been documented. Improvements in outcome are likely to be associated with preoperative identification of patients at high risk, modifications of perfusion technique, and interventions to minimize secondary thrombosis and progressive organ ischemia. [Copyright &y& Elsevier]

Published
2003
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23. Postesophagectomy morbidity, mortality, and length of hospital stay after preoperative chemoradiation therapy.

Author

Doty, John R., Salazar, Jorge D., Forastiere, Arlene A., Heath, Elisabeth I., Kleinberg, Lawrence, and Heitmiller, Richard F.

Subjects
ESOPHAGECTOMY, ESOPHAGEAL tumors, HOSPITAL admission & discharge, RADIOTHERAPY
Abstract

Background. Data suggest that preoperative chemoradiation improves survival in patients with stage II and III esophageal tumors. Whether preoperative therapy increases postesophagectomy morbidity and mortality has not been determined. This study evaluates our postoperative results after chemoradiation therapy.Methods. From 1989 through 1998, 120 consecutive patients underwent chemoradiation therapy followed by esophagectomy at our institution. The medical records for these patients were reviewed to determine patient age, sex, race, cell type, operative technique, complications, deaths, and length of hospital stay (LOS).Results. There were 106 (88%) men and 14 (12%) women with a mean age of 58 (32 to 77) years. White patients predominated (114 of 120, 95%); 98 (82%) had adenocarcinoma and 22 (18%) had squamous cell carcinoma. Operative technique was transhiatal in 91 (76%) patients, three-incision in 23 (19%), Ivor-Lewis in 4 (3%), and thoracoabdominal in 2 (2%). There was 1 death. Complications developed in 44 (37%) patients; 59% (13 of 22) of squamous cell carcinoma patients and 32% (31 of 98) of adenocarcinoma patients developed complications. Respiratory complications occurred in 32% (7 of 22) of squamous cell carcinoma patients and in 3% (3 of 98) of adenocarcinoma patients. Mean length of stay after surgery was 15 days (range 7 to 163).Conclusions. Postesophagectomy results after chemoradiation therapy are comparable to those reported after esophagectomy alone. Squamous cell carcinoma patients are nearly twice as likely to develop postoperative complications and are more likely to have respiratory complications than adenocarcinoma patients. [Copyright &y& Elsevier]

Published
2002
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25. Surgical Treatment of Isolated (Lone) Atrial Fibrillation with Gemini-S Ablation and Left Atrial Appendage Excision (GALAXY Procedure)

Author

Doty, John R. and Clayson, Stephen E.

Abstract

Objective Surgical ablation with radiofrequency is a safe and effective treatment for atrial fibrillation. Recent advances in instrumentation have allowed for the application of bipolar radiofrequency through a minimally invasive approach using small bilateral thoracotomies for pulmonary vein isolation, destruction of autonomic ganglia, and excision of the left atrial appendage (GALAXY procedure).Methods Thirty-two patients underwent surgical ablation of atrial fibrillation with the GALAXY procedure over a 43-month period. Data were collected in a prospective manner during hospitalization and at 1-, 3-, 6-, and 12-month intervals for rhythm, medications, and subsequent interventions.Results There were no operative mortality, no myocardial infarction, and no stroke. One patient required reexploration for bleeding. Mean follow-up was 28 months (range, 4–43 months). Freedom from atrial fibrillation at 12 and 24 months, respectively, was 90% and 67% for patients with paroxysmal fibrillation and 80% and 63% for patients with persistent atrial fibrillation. Of the patients who were not in sinus rhythm, four reverted to atrial fibrillation and two reverted to atrial flutter.Conclusions The GALAXY procedure is a safe and effective, minimally invasive method for treatment of isolated (lone) atrial fibrillation. The operation provides excellent short-term freedom from atrial fibrillation and should be considered in patients with isolated paroxysmal atrial fibrillation.

Published
2012
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26. Surgical Treatment of Isolated (Lone) Atrial Fibrillation with Gemini-S Ablation and Left Atrial Appendage Excision (GALAXY Procedure)

Author

Doty, John R. and Clayson, Stephen E.

Abstract

Objective Surgical ablation with radiofrequency is a safe and effective treatment for atrial fibrillation. Recent advances in instrumentation have allowed for the application of bipolar radiofrequency through a minimally invasive approach using small bilateral thoracotomies for pulmonary vein isolation, destruction of autonomic ganglia, and excision of the left atrial appendage (GALAXY procedure).Methods Thirty-two patients underwent surgical ablation of atrial fibrillation with the GALAXY procedure over a 43-month period. Data were collected in a prospective manner during hospitalization and at 1-, 3-, 6-, and 12-month intervals for rhythm, medications, and subsequent interventions.Results There were no operative mortality, no myocardial infarction, and no stroke. One patient required reexploration for bleeding. Mean follow-up was 28 months (range, 4–43 months). Freedom from atrial fibrillation at 12 and 24 months, respectively, was 90% and 67% for patients with paroxysmal fibrillation and 80% and 63% for patients with persistent atrial fibrillation. Of the patients who were not in sinus rhythm, four reverted to atrial fibrillation and two reverted to atrial flutter.Conclusions The GALAXY procedure is a safe and effective, minimally invasive method for treatment of isolated (lone) atrial fibrillation. The operation provides excellent short-term freedom from atrial fibrillation and should be considered in patients with isolated paroxysmal atrial fibrillation.

Published
2012
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27. Spectral-Lag Relations in GRB Pulses Detected with HETE-2

Author

Arimoto, Makoto, Kawai, Nobuyuki, Asano, Katsuaki, Hurley, Kevin, Suzuki, Motoko, Nakagawa, Yujin E., Shimokawabe, Takashi, Pazmino, Nicolas Vasquez, Sato, Rie, Matsuoka, Masaru, Yoshida, Atsumasa, Tamagawa, Toru, Shirasaki, Yuji, Sugita, Satoshi, Takahashi, Ichiro, Atteia, Jean-Luc, Pelangeon, Alexandre, Vanderspek, Roland, Graziani, Carlo, Prigozhin, Gregory, Villasenor, Joel, Jernigan, J. Garrett, Crew, Geoffrey B., Sakamoto, Takanori, Ricker, George R., Woosley, Stanford E., Butler, Nat, Levine, Alan, Doty, John P., Donaghy, Timothy Q., Lamb, Donald Q., Fenimore, Edward, Galassi, Mark, Boer, Michel, Dezalay, Jean-Pascal, Olive, Jean-François, Braga, João, Manchanda, Ravi, and Pizzichini, Graziella

Abstract

Using a pulse-fit method, we investigated the spectral lags between the traditional gamma-ray band (50–400 keV) and the X-ray band (6–25 keV) for 8 GRBs with known redshifts (GRB 010921, GRB 020124, GRB 020127, GRB 021211, GRB 030528, GRB 040924, GRB 041006, and GRB 050408), detected with the WXM and FREGATE instruments aboard the HETE-2 satellite. We found several relations for individual GRB pulses between the spectral lag and other observables, such as the luminosity, pulse duration, and peak energy, $E_{\rm peak}$. The obtained results are consistent with those for BATSE, indicating that the BATSE correlations are still valid at lower energies (6–25 keV). Furthermore, we found that the photon energy dependence for the spectral lags can be reconciled with the simple curvature effect model. We discuss the implications of these results from various points of view.

Published
2010
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28. HETE-2 Observations of the X-Ray Flash XRF 040916

Author

Arimoto, Makoto, Kawai, Nobuyuki, Suzuki, Motoko, Sato, Rie, Pazmino, Nicolas Vasquez, Shimokawabe, Takashi, Ishimura, Takuto, Kotoku, Jun’ichi, Yoshida, Atsumasa, Tamagawa, Toru, Shirasaki, Yuji, Matsuoka, Masaru, Nakagawa, Yujin, Ishikawa, Nobuyuki, Kobayashi, Akina, Sugita, Satoshi, Takahashi, Ichiro, Kuwahara, Makoto, Yamauchi, Makoto, Takagishi, Kunio, Hatsukade, Isamu, Atteia, Jean-Luc, Pelangeon, Alexandre, Vanderspek, Roland, Graziani, Carlo, Prigozhin, Gregory, Villasenor, Joel, Jernigan, J. Garrett, Crew, Geoffrey B., Hurley, Kevin, Sakamoto, Takanori, Ricker, George R., Woosley, Stanford E., Butler, Nat, Levine, Al, Doty, John P., Donaghy, Timothy Q., Lamb, Donald Q., Fenimore, Edward E., Galassi, Mark, Boer, Michel, Dezalay, Jean-Pascal, Olive, Jean-François, Braga, Joao, Manchanda, Ravi, and Pizzichini, Graziella

Abstract

A long X-ray flash was detected and localized by instruments aboard the High Energy Transient Explorer II (HETE-2) at 00:03:30 UT on 2004 September 16. The position was reported to the GRB Coordinates Network (GCN) approximately 2 hours after the burst. This burst consisted of two peaks separated by $\sim 200$s, with durations of about 110 s and 60 s. We analyzed the energy spectra of the 1st and 2nd peaks observed with the Wide Field X-Ray Monitor (WXM) and the French Gamma Telescope (FREGATE). We discuss the origin of the 2nd peak in terms of the flux variabilities and timescales. We find that it is most likely to be part of prompt emission, and is explained by a long-acting engine model. This feature is similar to some bright X-ray flares detected in the early afterglow phase of bursts observed by the Swift satellite.

Published
2007
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29. A Comprehensive Study of Short Bursts from SGR1806$-$20 and SGR1900$+$14 Detected by HETE-2

Author

Nakagawa, Yujin E., Yoshida, Atsumasa, Hurley, Kevin, Atteia, Jean-Luc, Maetou, Miki, Tamagawa, Toru, Suzuki, Motoko, Yamazaki, Tohru, Tanaka, Kaoru, Kawai, Nobuyuki, Shirasaki, Yuji, Pelangeon, Alexandre, Matsuoka, Masaru, Vanderspek, Roland, Crew, Geoff B., Villasenor, Joel S., Sato, Rie, Sugita, Satoshi, Kotoku, Jun’ichi, Arimoto, Makoto, Pizzichini, Graziella, Doty, John P., and Ricker, George R.

Abstract

Temporal and spectral studies of short bursts ($\lesssim$a few hundred milliseconds) are presented for the soft gamma repeaters (SGRs) 1806$-$20 and 1900$+$14 using the HETE-2 samples. In five years from 2001 to 2005, HETE-2 localized 50 bursts from SGR1806$-$20 and 5 bursts from SGR 1900 $+$14. The cumulative number–intensity distribution of SGR 1806$-$20 in the active year 2004 is well described by a power-law model with an index of $-$1.1$\pm$0.6. It is consistent with previous studies, but burst data taken in other years clearly give a steeper distribution. This may suggest that more energetic bursts could occur more frequently in periods of greater activity. From the data, the spectral evolution during bursts with a time scale of $\gtrsim$20 ms does not seem to be common in the HETE-2 sample. The spectra of all short bursts are well reproduced by a two blackbody function with temperatures of $\sim 4$and $\sim 11$keV. From a timing analysis to the SGR 1806$-$20 data, a time lag of 2.2$\pm$0.4 ms is found between the 30–100 keV and 2–10 keV radiation bands. This may imply (1) a very rapid spectral softening and energy reinjection, (2) diffused (elongated) emission plasma along the magnetic field lines in pseudo-equilibrium with multi-temperatures, or (3) a separate (located at $\lesssim$700 Km) emission region of a softer component (say, $\sim$4 keV), which could be reprocessed X-rays by higher energy ($\gtrsim$11 keV) photons from an emission region near the stellar surface.

Published
2007
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30. X-Ray Imaging Spectrometer (XIS) on Board Suzaku

Author

Koyama, Katsuji, Tsunemi, Hiroshi, Dotani, Tadayasu, Bautz, Mark W., Hayashida, Kiyoshi, Tsuru, Takeshi Go, Matsumoto, Hironori, Ogawara, Yoshiaki, Ricker, George R., Doty, John, Kissel, Steven E., Foster, Rick, Nakajima, Hiroshi, Yamaguchi, Hiroya, Mori, Hideyuki, Sakano, Masaaki, Hamaguchi, Kenji, Nishiuchi, Mamiko, Miyata, Emi, Torii, Ken’ichi, Namiki, Masaaki, Katsuda, Satoru, Matsuura, Daisuke, Miyauchi, Tomofumi, Anabuki, Naohisa, Tawa, Noriaki, Ozaki, Masanobu, Murakami, Hiroshi, Maeda, Yoshitomo, Ichikawa, Yoshinori, Prigozhin, Gregory Y., Boughan, Edward A., LaMarr, Beverly, Miller, Eric D., Burke, Barry E., Gregory, James A., Pillsbury, Allen, Bamba, Aya, Hiraga, Junko S., Senda, Atsushi, Katayama, Haruyoshi, Kitamoto, Shunji, Tsujimoto, Masahiro, Kohmura, Takayoshi, Tsuboi, Yohko, and Awaki, Hisamitsu

Abstract

The XIS is an X-ray Imaging Spectrometer system, consisting of state-of-the-art charge-coupled devices (CCDs) optimized for X-ray detection, camera bodies, and control electronics. Four sets of XIS sensors are placed at the focal planes of the grazing-incidence, nested thin-foil mirrors (XRT: X-Ray Telescope) onboard the Suzaku satellite. Three of the XIS sensors have front-illuminated CCDs, while the other has a back-illuminated CCD. Coupled with the XRT, the energy range of 0.2–12 keV with energy resolution of 130 eV at 5.9 keV, and a field of view of $18^\prime \times 18^\prime$are realized. Since the Suzaku launch on 2005 July 10, the XIS has been functioning well.

Published
2007
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31. The X-Ray Observatory Suzaku

Author

Mitsuda, Kazuhisa, Bautz, Mark, Inoue, Hajime, Kelley, Richard L., Koyama, Katsuji, Kunieda, Hideyo, Makishima, Kazuo, Ogawara, Yoshiaki, Petre, Robert, Takahashi, Tadayuki, Tsunemi, Hiroshi, White, Nicholas E., Anabuki, Naohisa, Angelini, Lorella, Arnaud, Keith, Awaki, Hisamitsu, Bamba, Aya, Boyce, Kevin, Brown, Gregory V., Chan, Kai-Wing, Cottam, Jean, Dotani, Tadayasu, Doty, John, Ebisawa, Ken, Ezoe, Yuichiro, Fabian, Andrew C., Figueroa, Enectali, Fujimoto, Ryuichi, Fukazawa, Yasushi, Furusho, Tae, Furuzawa, Akihiro, Gendreau, Keith, Griffiths, Richard E., Haba, Yoshito, Hamaguchi, Kenji, Harrus, Ilana, Hasinger, Günther, Hatsukade, Isamu, Hayashida, Kiyoshi, Henry, Patrick J., Hiraga, Junko S., Holt, Stephen S., Hornschemeier, Ann, Hughes, John P., Hwang, Una, Ishida, Manabu, Ishisaki, Yoshitaka, Isobe, Naoki, Itoh, Masayuki, Iyomoto, Naoko, Kahn, Steven M., Kamae, Tuneyoshi, Katagiri, Hideaki, Kataoka, Jun, Katayama, Haruyoshi, Kawai, Nobuyuki, Kilbourne, Caroline, Kinugasa, Kenzo, Kissel, Steve, Kitamoto, Shunji, Kohama, Mitsuhiro, Kohmura, Takayoshi, Kokubun, Motohide, Kotani, Taro, Kotoku, Jun’ichi, Kubota, Aya, Madejski, Greg M., Maeda, Yoshitomo, Makino, Fumiyoshi, Markowitz, Alex, Matsumoto, Chiho, Matsumoto, Hironori, Matsuoka, Masaru, Matsushita, Kyoko, McCammon, Dan, Mihara, Tatehiko, Misaki, Kazutami, Miyata, Emi, Mizuno, Tsunefumi, Mori, Koji, Mori, Hideyuki, Morii, Mikio, Moseley, Harvey, Mukai, Koji, Murakami, Hiroshi, Murakami, Toshio, Mushotzky, Richard, Nagase, Fumiaki, Namiki, Masaaki, Negoro, Hitoshi, Nakazawa, Kazuhiro, Nousek, John A., Okajima, Takashi, ogasaka, yasushi, Ohashi, Takaya, Oshima, Tai, Ota, Naomi, Ozaki, Masanobu, Ozawa, Hideki, Parmar, Arvind N., Pence, William D., Porter, F. Scott, Reeves, James N., Ricker, George R., Sakurai, Ikuya, Sanders, Wilton T., Senda, Atsushi, Serlemitsos, Peter, Shibata, Ryo, Soong, Yang, Smith, Randall, Suzuki, Motoko, Szymkowiak, Andrew E., Takahashi, Hiromitsu, Tamagawa, Toru, Tamura, Keisuke, Tamura, Takayuki, Tanaka, Yasuo, Tashiro, Makoto, Tawara, Yuzuru, Terada, Yukikatsu, Terashima, Yuichi, Tomida, Hiroshi, Torii, Ken’ichi, Tsuboi, Yohko, Tsujimoto, Masahiro, Tsuru, Takeshi Go, Turner, Martin J. L., Ueda, Yoshihiro, Ueno, Shiro, Ueno, Masaru, Uno, Shin’ichiro, Urata, Yuji, Watanabe, Shin, Yamamoto, Norimasa, Yamaoka, Kazutaka, Yamasaki, Noriko Y., Yamashita, Koujun, Yamauchi, Makoto, Yamauchi, Shigeo, Yaqoob, Tahir, Yonetoku, Daisuke, and Yoshida, Atsumasa

Abstract

High-sensitivity wide-band X-ray spectroscopy is the key feature of the Suzaku X-ray observatory, launched on 2005 July 10. This paper summarizes the spacecraft, in-orbit performance, operations, and data processing that are related to observations. The scientific instruments, the high-throughput X-ray telescopes, X-ray CCD cameras, non-imaging hard X-ray detector are also described.

Published
2007
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32. An Optically Dark GRB Observed by HETE-2: GRB 051022

Author

Nakagawa, Yujin E., Yoshida, Atsumasa, Sugita, Satoshi, Tanaka, Kaoru, Ishikawa, Nobuyuki, Tamagawa, Toru, Suzuki, Motoko, Shirasaki, Yuji, Kawai, Nobuyuki, Matsuoka, Masaru, Atteia, Jean-Luc, Pelangeon, Alexandre, Vanderspek, Roland, Crew, Geoffrey B., Villasenor, Joel S., Butler, Nat, Doty, John P., Ricker, George R., Pizzichini, Graziella, Donaghy, Timothy Q., Lamb, Donald Q., Graziani, Carlo, Sato, Rie, Maetou, Miki, Arimoto, Makoto, Kotoku, Jun’ichi, Jernigan, J. Garrett, Sakamoto, Takanori, Olive, Jean-François, Boer, Michel, Fenimore, Edward E., Galassi, Mark, Woosley, Stanford E., Yamauchi, Makoto, Takagishi, Kunio, and Hatsukade, Isamu

Abstract

GRB 051022 was detected at 13:07:58 on 2005 October 22 UT by HETE-2. The location of GRB 051022 was determined immediately by the flight localization system. This burst contained multiple pulses, and had a rather long duration of about 190 s. The detections of candidate X-ray and radio afterglows were reported, whereas no optical afterglow was found. Optical spectroscopic observations of the host galaxy revealed a redshift of $z = 0.8$. Using data derived by a HETE-2 observation of the prompt emission, we found absorption of $N_{\mathrm{H}} = (8.8_{-2.9}^{+3.1}) \times 10^{22} \,\mathrm{cm}^{-2}$and visual extinction of $A_{V} = 49_{-16}^{+17}$mag in the host galaxy. If this is the case, no detection of any optical transient would be quite reasonable. The absorption derived by Swift XRT observations of the afterglow is fully consistent with those obtained from an early HETE-2 observation of the prompt emission. Our analysis implies an interpretation that the absorbing medium may be outside the external shock at $R \sim 10^{16} \,\mathrm{cm}$, which could be a dusty molecular cloud.

Published
2006
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33. HETE-2 Localization and Observations of the Gamma-Ray Burst GRB 020813

Author

Sato, Rie, Sakamoto, Takanori, Kataoka, Jun, Yoshida, Atsumasa, Suzuki, Motoko, Kotoku, Junichi, Urata, Yuji, Yamamoto, Yoshihisa, Arimoto, Makoto, Tamagawa, Toru, Shirasaki, Yuji, Torii, Ken’ichi, Matsuoka, Masaru, Nakagawa, Yujin, Yamazaki, Toru, Tanaka, Kaoru, Maetou, Miki, Yamauchi, Makoto, Takagishi, Kunio, Lamb, Donald Q., Atteia, Jean-Luc, Vanderspek, Roland, Graziani, Carlo, Prigozhin, Gregory, Villasenor, Joel, Jernigan, J. Garrett, Crew, Geoffrey B., Hurley, Kevin, Ricker, George R., Woosley, Stanford E., Butler, Nat, Levine, Al, Doty, John P., Donaghy, Timothy Q., Fenimore, Edward E., Galassi, Mark, Boer, Michel, Dezalay, Jean-Pascal, Olive, Jean-François, Braga, Joao, Manchanda, Ravi, Pizzichini, Graziella, and Kawai, Nobuyuki

Abstract

A bright, long gamma-ray burst (GRB) was detected and localized by the instruments on board the High Energy Transient Explorer 2 satellite (HETE-2) at 02:44:19.17 UTC (9859.17 s UT) on 2002 August 13. The location was reported to the GRB Coordinates Network (GCN) about 4 min after the burst. In the prompt emission, the burst had a duration of approximately 125 s, and more than four peaks. We analyzed the time-resolved 2–400 keV energy spectra of the prompt emission of GRB 020813 using the Wide Field X-Ray Monitor (WXM) and the French Gamma Telescope (FREGATE) in detail. We found that the early part of the burst (17–52 s after the burst trigger) shows a depletion of low-energy photons below about 50 keV. It is difficult to explain the depletion by either synchrotron self-absorption or Comptonization. One possibility is that the low-energy depletion may be understood as a mixture of “jitter” radiation with the usual synchrotron radiation component.

Published
2005
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37. Bypass of superior vena cava

Author

Doty, Donald B., Doty, John R., and Jones, Kent W.

Abstract

Nine patients had operations for obstruction of the superior vena cava with superior vena caval syndrome caused by benign disease. Three patients had fibrosing mediastinitis, four had fibrosing mediastinitis with caseous necrosis, one had thrombosis of the superior vena cava around a pacemaker electrode, and one had spontaneous thrombosis of the superior vena cava. Patients ranged in age from 25 to 68 years. All bypass operations were performed with a composite spiral vein graft constructed from the patient's own saphenous vein, split longitudinally and wrapped around a stent in spiral fashion. The edges of the vein were sutured together to form a large conduit ranging in diameter from 9.5 to 15.0 mm. Six grafts were from the left innominate vein and three grafts were from the internal jugular vein. The grafts were placed into the right atrial appendage in all except one case, in which the graft was to the distal superior vena cava. Follow-up extends from 1 to 15 years. One patient required reoperation at 4 days for thrombosis at the innominate vein-graft anastomosis. Resection of the anastomosis and reconstruction of the graft rendered the patient symptom free. Two grafts closed during the first year after operation. One patient had advancing fibrosing mediastinitis, and a second bypass graft from the external jugular veins remain patent. Another patient had recurrence of spontaneous venous thrombosis. Thus seven of nine grafts remain patent for up to nearly 15 years and all but one patient is free of superior vena caval syndrome. These data show that bypass of the obstructed superior vena cava with a spiral vein graft relieves superior vena caval syndrome and demonstrate long-term patency of the graft.

Published
1990
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38. Immediate reports of GRBs in progress from HETE

Author

Vanderspek, Roland, Doty, John P., Crew, Geoffrey B., and Ricker, George R.

Abstract

The High Energy Transient Experiment (HETE) will be able to perform multiwavelength observations of?-ray and X-ray bursts. HETE will potentially be able to localize?-ray bursts to a precision of ~20 arc-minutes if significant X-ray flux is detected from the burst; a precision of ~20 arc-seconds is possible if there is also significant UV radiation from the burst. HETE will broadcast information about bursts detected within seconds of their detection. This VHF-band broadcast will be received at a number of secondary ground stations (SGS) dedicated to HETE, and forwarded to a central distribution site at MIT, from which it is sent to interested observers via Internet.

Published
1995
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39. The UV cameras on the High Energy Transient Experiment (HETE)

Author

Vanderspek, Roland, Atlas, Alia, Brady, Tye M., Crew, Geoffrey B., Doty, John P., Kissel, Steven E., Ricker, George R., Tappan, Peter C., Martel, Francois, and Tim Jones, M.

Abstract

The High Energy Transient Experiment (HETE), scheduled for launch this year, is a small satellite dedicated to multiwavelength observations of ?-ray and X-ray bursts. The HETE spacecraft will be equipped with gamma-ray detectors, X-ray detectors with a coded mask, and ultraviolet-sensitive CCD cameras. The UV cameras on HETE are wide-field imagers which will a) provide UV images of the regions in which ?-ray or X-ray bursts are detected, before, duringand after the burst, b) detect UV transients, whether associated with a high-energy transient or not, c) monitor the brightnesses of field stars for variability over a wide range of timescales, and d) serve as star trackers for HETE. In this poster, we describe the HETE UV instrumentation, control software, and data products.

Published
1995
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41. Publisher Correction: A planet within the debris disk around the pre-main-sequence star AU Microscopii

Author

Plavchan, Peter, Barclay, Thomas, Gagné, Jonathan, Gao, Peter, Cale, Bryson, Matzko, William, Dragomir, Diana, Quinn, Sam, Feliz, Dax, Stassun, Keivan, Crossfield, Ian J. M., Berardo, David A., Latham, David W., Tieu, Ben, Anglada-Escudé, Guillem, Ricker, George, Vanderspek, Roland, Seager, Sara, Winn, Joshua N., Jenkins, Jon M., Rinehart, Stephen, Krishnamurthy, Akshata, Dynes, Scott, Doty, John, Adams, Fred, Afanasev, Dennis A., Beichman, Chas, Bottom, Mike, Bowler, Brendan P., Brinkworth, Carolyn, Brown, Carolyn J., Cancino, Andrew, Ciardi, David R., Clampin, Mark, Clark, Jake T., Collins, Karen, Davison, Cassy, Foreman-Mackey, Daniel, Furlan, Elise, Gaidos, Eric J., Geneser, Claire, Giddens, Frank, Gilbert, Emily, Hall, Ryan, Hellier, Coel, Henry, Todd, Horner, Jonathan, Howard, Andrew W., Huang, Chelsea, Huber, Joseph, Kane, Stephen R., Kenworthy, Matthew, Kielkopf, John, Kipping, David, Klenke, Chris, Kruse, Ethan, Latouf, Natasha, Lowrance, Patrick, Mennesson, Bertrand, Mengel, Matthew, Mills, Sean M., Morton, Tim, Narita, Norio, Newton, Elisabeth, Nishimoto, America, Okumura, Jack, Palle, Enric, Pepper, Joshua, Quintana, Elisa V., Roberge, Aki, Roccatagliata, Veronica, Schlieder, Joshua E., Tanner, Angelle, Teske, Johanna, Tinney, C. G., Vanderburg, Andrew, von Braun, Kaspar, Walp, Bernie, Wang, Jason, Wang, Sharon Xuesong, Weigand, Denise, White, Russel, Wittenmyer, Robert A., Wright, Duncan J., Youngblood, Allison, Zhang, Hui, and Zilberman, Perri

Abstract

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

Published
2020
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42. Radiopaque Marker Addition During Aortic Root Replacement With the Use of a Freestyle Porcine Bioprosthesis.

Author

Crowley, Olivia M. and Doty, John R.

Abstract

Aortic root replacement is indicated for aortic root aneurysm, small aortic root, and most root abscesses. This report describes the placement of a radiopaque marker during aortic root replacement using a Freestyle porcine bioprosthesis. This marker is a useful landmark during fluoroscopy for transcatheter valve-in-valve aortic valve replacement in the event of bioprosthesis degeneration. [ABSTRACT FROM AUTHOR]

Published
2017
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44. Hitomi (ASTRO-H) X-ray Astronomy Satellite

Author

Takahashi, Tadayuki, Kokubun, Motohide, Mitsuda, Kazuhisa, Kelley, Richard L., Ohashi, Takaya, Aharonian, Felix, Akamatsu, Hiroki, Akimoto, Fumie, Allen, Steven W., Anabuki, Naohisa, Angelini, Lorella, Arnaud, Keith, Asai, Makoto, Audard, Marc, Awaki, Hisamitsu, Axelsson, Magnus, Azzarello, Philipp, Baluta, Chris, Bamba, Aya, Bando, Nobutaka, Bautz, Marshall W., Bialas, Thomas, Blandford, Roger, Boyce, Kevin, Brenneman, Laura W., Brown, Gregory V., Bulbul, Esra, Cackett, Edward M., Canavan, Edgar, Chernyakova, Maria, Chiao, Meng P., Coppi, Paolo S., Costantini, Elisa, O’ Dell, Steve, DiPirro, Michael, Done, Chris, Dotani, Tadayasu, Doty, John, Ebisawa, Ken, Eckart, Megan E., Enoto, Teruaki, Ezoe, Yuichiro, Fabian, Andrew C., Ferrigno, Carlo, Foster, Adam R., Fujimoto, Ryuichi, Fukazawa, Yasushi, Funk, Stefan, Furuzawa, Akihiro, Galeazzi, Massimiliano, Gallo, Luigi C., Gandhi, Poshak, Gilmore, Kirk, Giustini, Margherita, Goldwurm, Andrea, Gu, Liyi, Guainazzi, Matteo, Haas, Daniel, Haba, Yoshito, Hagino, Kouichi, Hamaguchi, Kenji, Harrus, Ilana M., Hatsukade, Isamu, Hayashi, Takayuki, Hayashi, Katsuhiro, Hayashida, Kiyoshi, den Herder, Jan-Willem, Hiraga, Junko S., Hirose, Kazuyuki, Hornschemeier, Ann, Hoshino, Akio, Hughes, John P., Ichinohe, Yuto, Iizuka, Ryo, Inoue, Hajime, Inoue, Yoshiyuki, Ishibashi, Kazunori, Ishida, Manabu, Ishikawa, Kumi, Ishimura, Kosei, Ishisaki, Yoshitaka, Itoh, Masayuki, Iwai, Masachika, Iwata, Naoko, Iyomoto, Naoko, Jewell, Chris, Kaastra, Jelle, Kallman, Tim, Kamae, Tsuneyoshi, Kara, Erin, Kataoka, Jun, Katsuda, Satoru, Katsuta, Junichiro, Kawaharada, Madoka, Kawai, Nobuyuki, Kawano, Taro, Kawasaki, Shigeo, Khangulyan, Dmitry, Kilbourne, Caroline A., Kimball, Mark, King, Ashley, Kitaguchi, Takao, Kitamoto, Shunji, Kitayama, Tetsu, Kohmura, Takayoshi, Konami, Saori, Kosaka, Tatsuro, Koujelev, Alex, Koyama, Katsuji, Koyama, Shu, Kretschmar, Peter, Krimm, Hans A., Kubota, Aya, Kunieda, Hideyo, Laurent, Philippe, Lee, Shiu-Hang, Leutenegger, Maurice A., Limousin, Olivier, Loewenstein, Michael, Long, Knox S., Lumb, David, Madejski, Greg, Maeda, Yoshitomo, Maier, Daniel, Makishima, Kazuo, Markevitch, Maxim, Masters, Candace, Matsumoto, Hironori, Matsushita, Kyoko, McCammon, Dan, Mcguinness, Daniel, McNamara, Brian R., Mehdipour, Missagh, Miko, Joseph, Miller, Eric D., Miller, Jon M., Mineshige, Shin, Minesugi, Kenji, Mitsuishi, Ikuyuki, Miyazawa, Takuya, Mizuno, Tsunefumi, Mori, Hideyuki, Mori, Koji, Moroso, Franco, Moseley, Harvey, Muench, Theodore, Mukai, Koji, Murakami, Hiroshi, Murakami, Toshio, Mushotzky, Richard F., Nagano, Housei, Nagino, Ryo, Nakagawa, Takao, Nakajima, Hiroshi, Nakamori, Takeshi, Nakano, Toshio, Nakashima, Shinya, Nakazawa, Kazuhiro, Namba, Yoshiharu, Natsukari, Chikara, Nishioka, Yusuke, Nobukawa, Kumiko K., Nobukawa, Masayoshi, Noda, Hirofumi, Nomachi, Masaharu, Odaka, Hirokazu, Ogawa, Hiroyuki, Ogawa, Mina, Ogi, Keiji, Ohno, Masanori, Ohta, Masayuki, Okajima, Takashi, Okamoto, Atsushi, Okazaki, Tsuyoshi, Ota, Naomi, Ozaki, Masanobu, Paerels, Frits, Paltani, Stéphane, Parmar, Arvind, Petre, Robert, Pinto, Ciro, de Plaa, Jelle, Pohl, Martin, Pontius, James, Porter, Frederick S., Pottschmidt, Katja, Ramsey, Brian, Reynolds, Christopher, Russell, Helen, Safi-Harb, Samar, Saito, Shinya, Sakai, Kazuhiro, Sakai, Shin-ichiro, Sameshima, Hiroaki, Sasaki, Toru, Sato, Goro, Sato, Kosuke, Sato, Rie, Sato, Yoichi, Sawada, Makoto, Schartel, Norbert, Serlemitsos, Peter J., Seta, Hiromi, Shibano, Yasuko, Shida, Maki, Shidatsu, Megumi, Shimada, Takanobu, Shinozaki, Keisuke, Shirron, Peter, Simionescu, Aurora, Simmons, Cynthia, Smith, Randall K., Sneiderman, Gary, Soong, Yang, Stawarz, Łukasz, Sugawara, Yasuharu, Sugita, Satoshi, Sugita, Hiroyuki, Szymkowiak, Andrew, Tajima, Hiroyasu, Takahashi, Hiromitsu, Takeda, Shin’ichiro, Takei, Yoh, Tamagawa, Toru, Tamura, Takayuki, Tamura, Keisuke, Tanaka, Takaaki, Tanaka, Yasuo, Tanaka, Yasuyuki T., Tashiro, Makoto S., Tawara, Yuzuru, Terada, Yukikatsu, Terashima, Yuichi, Tombesi, Francesco, Tomida, Hiroshi, Tsuboi, Yohko, Tsujimoto, Masahiro, Tsunemi, Hiroshi, Tsuru, Takeshi Go, Uchida, Hiroyuki, Uchiyama, Hideki, Uchiyama, Yasunobu, Ueda, Shutaro, Ueda, Yoshihiro, Ueno, Shiro, Uno, Shin’ichiro, Urry, C. Megan, Ursino, Eugenio, de Vries, Cor P., Wada, Atsushi, Watanabe, Shin, Watanabe, Tomomi, Werner, Norbert, Wik, Daniel R., Wilkins, Dan R., Williams, Brian J., Yamada, Shinya, Yamada, Takahiro, Yamaguchi, Hiroya, Yamaoka, Kazutaka, Yamasaki, Noriko Y., Yamauchi, Makoto, Yamauchi, Shigeo, Yaqoob, Tahir, Yatsu, Yoichi, Yonetoku, Daisuke, Yoshida, Atsumasa, Yuasa, Takayuki, Zhuravleva, Irina, and Zoghbi, Abderahmen

Published
2018
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45. In-orbit performance of the soft X-ray imaging system aboard Hitomi (ASTRO-H)*

Author

Nakajima, Hiroshi, Maeda, Yoshitomo, Uchida, Hiroyuki, Tanaka, Takaaki, Tsunemi, Hiroshi, Hayashida, Kiyoshi, Tsuru, Takeshi G, Dotani, Tadayasu, Nagino, Ryo, Inoue, Shota, Ozaki, Masanobu, Tomida, Hiroshi, Natsukari, Chikara, Ueda, Shutaro, Mori, Koji, Yamauchi, Makoto, Hatsukade, Isamu, Nishioka, Yusuke, Sakata, Miho, Beppu, Tatsuhiko, Honda, Daigo, Nobukawa, Masayoshi, Hiraga, Junko S, Kohmura, Takayoshi, Murakami, Hiroshi, Nobukawa, Kumiko K, Bamba, Aya, Doty, John P, Iizuka, Ryo, Sato, Toshiki, Kurashima, Sho, Nakaniwa, Nozomi, Asai, Ryota, Ishida, Manadu, Mori, Hideyuki, Soong, Yang, Okajima, Takashi, Serlemitsos, Peter, Tawara, Yuzuru, Mitsuishi, Ikuyuki, Ishibashi, Kazunori, Tamura, Keisuke, Hayashi, Takayuki, Furuzawa, Akihiro, Sugita, Satoshi, Miyazawa, Takuya, Awaki, Hisamitsu, Miller, Eric D, and Yamaguchi, Hiroya

Abstract

We describe the in-orbit performance of the soft X-ray imaging system consisting of the Soft X-ray Telescope and the Soft X-ray Imager aboard Hitomi. Verification and calibration of imaging and spectroscopic performance are carried out, making the best use of the limited data of less than three weeks. Basic performance, including a large field of view of ${38^{\prime }}$× ${38^{\prime }}$, is verified with the first-light image of the Perseus cluster of galaxies. Amongst the small number of observed targets, the on-minus-off pulse image for the out-of-time events of the Crab pulsar enables us to measure the half-power diameter of the telescope as ∼${1 {^{\prime}_{.}} 3}$. The average energy resolution measured with the onboard calibration source events at 5.89 keV is 179 ± 3 eV in full width at half maximum. Light leak and crosstalk issues affected the effective exposure time and the effective area, respectively, because all the observations were performed before optimizing an observation schedule and the parameters for the dark-level calculation. Screening the data affected by these two issues, we measure the background level to be 5.6 × 10−6counts s−1arcmin−2cm−2in the energy band of 5–12 keV, which is seven times lower than that of the Suzaku XIS-BI.

Published
2018
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46. Antibiotic-Impregnated Beads for the Treatment of Aortic Graft Infection.

Author

Healy, Aaron H., Reid, Bruce B., Allred, Bryce D., and Doty, John R.

Subjects
CALCIUM sulfate, ANTIBIOTICS, SURGICAL complications, PLASTIC surgery, TRANSPLANTATION of organs, tissues, etc., CALCIUM salts
Abstract

Infection of a prosthetic graft after replacement of the ascending aorta is an uncommon but life-threatening complication of surgery. We report the use of antibiotic-impregnated calcium sulfate beads in a patient with ascending aortic graft infection to provide localized, high-dose therapy to the infected region. Perigraft placement of antibiotic beads provides an alternative method for the treatment of aortic graft infection. [Copyright &y& Elsevier]

Published
2012
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50. Soft x-ray imager (SXI) onboard ASTRO-H

Author

den Herder, Jan-Willem A., Takahashi, Tadayuki, Bautz, Marshall, Tsunemi, Hiroshi, Hayashida, Kiyoshi, Tsuru, Takeshi Go, Dotani, Tadayasu, Nakajima, Hiroshi, Anabuki, Naohisa, Nagino, Ryo, Tanaka, Takaaki, Uchida, Hiroyuki, Ozaki, Masanobu, Natsukari, Chikara, Tomida, Hiroshi, Ueda, Shutaro, Iwai, Masachika, Nobukawa, Masayoshi, Hiraga, Junko S., Kohmura, Takayoshi, Murakami, Hiroshi, Mori, Koji, Yamauchi, Makoto, Hatsukade, Isamu, Nishioka, Yusuke, Bamba, Aya, Nobukawa, Kumiko K., and Doty, John

Published
2016
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