Zobrazeno 1 - 10
of 295
pro vyhledávání: '"Paul S. Smith"'
Autor:
Andrea Gokus, Markus Böttcher, Manel Errando, Michael Kreter, Jonas Heßdörfer, Florian Eppel, Matthias Kadler, Paul S. Smith, Petra Benke, Leonid I. Gurvits, Alex Kraus, Mikhail Lisakov, Felicia McBride, Eduardo Ros, Florian Rösch, Jörn Wilms
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 1, p 38 (2024)
Blazars can be detected from very large distances due to their high luminosity. However, the detection of γ -ray emission of blazars beyond z = 3 has only been confirmed for a small number of sources. Such observations probe the growth of supermassi
Externí odkaz:
https://doaj.org/article/116e7931e0024f36b75935839ce31d26
Autor:
Yue Shen, Catherine J. Grier, Keith Horne, Zachary Stone, Jennifer I. Li, Qian Yang, Yasaman Homayouni, Jonathan R. Trump, Scott F. Anderson, W. N. Brandt, Patrick B. Hall, Luis C. Ho, Linhua Jiang, Patrick Petitjean, Donald P. Schneider, Charling Tao, Fergus. R. Donnan, Yusra AlSayyad, Matthew A. Bershady, Michael R. Blanton, Dmitry Bizyaev, Kevin Bundy, Yuguang Chen, Megan C. Davis, Kyle Dawson, Xiaohui Fan, Jenny E. Greene, Hannes Gröller, Yucheng Guo, Héctor Ibarra-Medel, Yuanzhe Jiang, Ryan P. Keenan, Juna A. Kollmeier, Cassandra Lejoly, Zefeng Li, Axel de la Macorra, Maxwell Moe, Jundan Nie, Graziano Rossi, Paul S. Smith, Wei Leong Tee, Anne-Marie Weijmans, Jiachuan Xu, Minghao Yue, Xu Zhou, Zhimin Zhou, Hu Zou
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 272, Iss 2, p 26 (2024)
We present the final data from the Sloan Digital Sky Survey (SDSS) Reverberation Mapping (RM) project, a precursor to the SDSS-V Black Hole Mapper RM program. This data set includes 11 yr photometric and 7 yr spectroscopic light curves for 849 broad-
Externí odkaz:
https://doaj.org/article/6d791eb279de4413b8eae4a884dd70d2
Autor:
A. Acharyya, C. B. Adams, A. Archer, P. Bangale, W. Benbow, A. Brill, J. L. Christiansen, A. J. Chromey, M. Errando, A. Falcone, Q. Feng, J. P. Finley, G. M. Foote, L. Fortson, A. Furniss, G. Gallagher, W. Hanlon, D. Hanna, O. Hervet, C. E. Hinrichs, J. Hoang, J. Holder, W. Jin, M. N. Johnson, P. Kaaret, M. Kertzman, D. Kieda, T. K. Kleiner, N. Korzoun, F. Krennrich, M. J. Lang, M. Lundy, G. Maier, C. E McGrath, M. J. Millard, J. Millis, C. L. Mooney, P. Moriarty, R. Mukherjee, S. O’Brien, R. A. Ong, M. Pohl, E. Pueschel, J. Quinn, K. Ragan, P. T. Reynolds, D. Ribeiro, E. Roache, I. Sadeh, A. C. Sadun, L. Saha, M. Santander, G. H. Sembroski, R. Shang, M. Splettstoesser, A. K. Talluri, J. V. Tucci, V. V. Vassiliev, D. A. Williams, S. L. Wong, The VERITAS Collaboration, Talvikki Hovatta, Svetlana G. Jorstad, Sebastian Kiehlmann, Anne Lähteenmäki, Ioannis Liodakis, Alan P. Marscher, Walter Max-Moerbeck, Anthony C. S. Readhead, Rodrigo Reeves, Paul S. Smith, Merja Tornikoski
Publikováno v:
The Astrophysical Journal, Vol 950, Iss 2, p 152 (2023)
We report the detection of very high energy gamma-ray emission from the blazar S3 1227+25 (VER J1230+253) with the Very Energetic Radiation Imaging Telescope Array System (VERITAS). VERITAS observations of the source were triggered by the detection o
Externí odkaz:
https://doaj.org/article/04ea3150d4504f4d96c295106d36fb55
Autor:
Valeri M. Larionov, Svetlana G. Jorstad, Alan P. Marscher, Paul S. Smith, Sergey Savchenko, Daria Morozova, Tatiana Grishina, Evgenia Kopatskaya, Liudmila Larionova, Elena Larionova, Anna Mokrushina, Ivan Troitsky, Yulia Troitskaya, George Borman
Publikováno v:
Galaxies, Vol 5, Iss 4, p 91 (2017)
Blazar CTA 102 underwent exceptional optical and high-energy outbursts in 2012 and 2016–2017. We analyze its behaviour during these events, focusing on polarimetry as a tool that allows us to trace changes in the physical conditions and geometric c
Externí odkaz:
https://doaj.org/article/c64fa2fcb06d4ac9bc5e7b2fc25fd4bf
Autor:
Maria I. Carnerero, Claudia M. Raiteri, Massimo Villata, Jose A. Acosta Pulido, Paul S. Smith, Valeri M. Larionov, the WEBT Collaboration
Publikováno v:
Galaxies, Vol 4, Iss 4, p 61 (2016)
We investigate the multiwavelength behaviour of the high-energy peaked BL Lac object (HBL) Mrk 421 at redshift z = 0 . 031 in the period 2007–2015. We use optical photometric, spectroscopic, and polarimetric data and near-infrared data obtained by
Externí odkaz:
https://doaj.org/article/1de4ba2daa9b4764906941a742d77fa4
Publikováno v:
Galaxies, Vol 4, Iss 4, p 43 (2016)
Large and variable polarization is an inherent property of a majority of blazars. Systematic rotations of the polarization vector have been claimed for several blazars. In some cases, however, the reality of these rotations may be questionable. We su
Externí odkaz:
https://doaj.org/article/6d0db92df2b046139abe81582be76557
Autor:
Paul S. Smith
Publikováno v:
Galaxies, Vol 4, Iss 3, p 27 (2016)
The Fermi Gamma-ray Space Telescope (Fermi) has focused the intensive multi-wavelength and international observational effort on blazars since it was launched in 2008. Part of this effort involves systematic monitoring of the highly variable polariza
Externí odkaz:
https://doaj.org/article/d936504843d44b9998c6aeb5258cce87
Autor:
Carolina Casadio, José L. Gómez, Svetlana G. Jorstad, Alan P. Marscher, Paola Grandi, Valeri M. Larionov, Matthew L. Lister, Paul S. Smith, Mark A. Gurwell, Anne Lähteenmäki, Iván Agudo, Sol N. Molina, Vishal Bala, Manasvita Joshi, Brian Taylor, Karen E. Williamson, Yuri Y. Kovalev, Tuomas Savolainen, Alexander B. Pushkarev, Arkady A. Arkharov, Dmitry A. Blinov, George A. Borman, Andrea Di Paola, Tatiana S. Grishina, Vladimir A. Hagen-Thorn, Ryosuke Itoh, Evgenia N. Kopatskaya, Elena G. Larionova, Liudmila V. Larionova, Daria A. Morozova, Elizaveta Rastorgueva-Foi, Sergey G. Sergeev, Merja Tornikoski, Ivan S. Troitsky, Clemens Thum, Helmut Wiesemeyer
Publikováno v:
Galaxies, Vol 4, Iss 4, p 34 (2016)
We present multi-wavelength studies of the radio galaxy 3C 120 and the blazar CTA 102 during unprecedented γ-ray flares for both sources. In both studies the analysis of γ-ray data has been compared with a series of 43 GHz VLBA images from the VLBA
Externí odkaz:
https://doaj.org/article/d66273c2e2394420b34a6a9935a63396
Autor:
David J. Sand, Chengyuan Xu, Ken'ichi Nomoto, Iair Arcavi, Koichi Itagaki, Y. Dong, Gagandeep S. Anand, Takashi J. Moriya, T. Noguchi, Jamison Burke, Alexei V. Filippenko, Jennifer E. Andrews, D. Andrew Howell, Gastón Folatelli, Keiichi Maeda, Curtis McCully, Daichi Hiramatsu, Melina C. Bersten, G. Grant Williams, Stefano Valenti, Nozomu Tominaga, Schuyler D. Van Dyk, Peter J. Brown, Patrick L. Kelly, Jared A. Goldberg, Nathan Smith, Griffin Hosseinzadeh, Paul S. Smith, Christopher Bilinski, K. Azalee Bostroem
In the transitional mass range (~8–10 solar masses) between white dwarf formation and iron core-collapse supernovae, stars are expected to produce an electron-capture supernova. Theoretically, these progenitors are thought to be super-asymptotic gi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c5f50e0dafdc37a66b8b17e0d2c11cef
https://resolver.caltech.edu/CaltechAUTHORS:20210202-095214084
https://resolver.caltech.edu/CaltechAUTHORS:20210202-095214084
Autor:
Xiheng Shi, Ning Jiang, Paul S. Smith, Xiang Pan, Peng Jiang, Shaohua Zhang, Tuo Ji, Hongyan Zhou, Luming Sun, Xuejie Dai, Honglin Lu, Wenjuan Liu, Chenwei Yang
We present new spectrophotometric and spectropolarimetric observations of Mrk 1239, one of the 8 prototypes that defines type-1 narrow-line Seyfert galaxies (NLS1s). Unlike the other typical NLS1s though, a high degree of polarization ($P\sim$5.6%) a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8b2833301a1d93b626362128769f2c26
http://arxiv.org/abs/2105.13672
http://arxiv.org/abs/2105.13672