Zobrazeno 51 - 60
of 246
pro vyhledávání: '"Clarke, Tracy"'
Recent X-ray observations of galaxy clusters have shown that there is substructure present in the intracluster medium (ICM), even in clusters that are seemingly relaxed. This substructure is sometimes a result of sloshing of the ICM, which occurs in
Externí odkaz:
http://arxiv.org/abs/1306.3520
Autor:
Hicks, Brian C., Paravastu-Dalal, Nagini, Stewart, Kenneth P., Erickson, William C., Ray, Paul S., Kassim, Namir E., Burns, Steve, Clarke, Tracy, Schmitt, Henrique, Craig, Joe, Hartman, Jake, Weiler, Kurt W.
We describe an "active" antenna system for HF/VHF (long wavelength) radio astronomy that has been successfully deployed 256-fold as the first station (LWA1) of the planned Long Wavelength Array. The antenna system, consisting of crossed dipoles, an a
Externí odkaz:
http://arxiv.org/abs/1210.0506
Publikováno v:
J. Astron. Instrum. 01, 1250006 (2012)
The Long Wavelength Array Software Library (LSL) is a Python module that provides a collection of utilities to analyze and export data collected at the first station of the Long Wavelength Array, LWA1. Due to the nature of the data format and large-N
Externí odkaz:
http://arxiv.org/abs/1209.1576
Autor:
Wik, Daniel R., Sarazin, Craig L., Zhang, Yu-Ying, Baumgartner, Wayne H., Mushotzky, Richard F., Tueller, Jack, Okajima, Takashi, Clarke, Tracy E.
Publikováno v:
2012, ApJ, 748, 67
The search for diffuse non-thermal, inverse Compton (IC) emission from galaxy clusters at hard X-ray energies has been underway for many years, with most detections being either of low significance or controversial. In this work, we investigate 14-19
Externí odkaz:
http://arxiv.org/abs/1207.0506
Autor:
Giacintucci, Simona, O'Sullivan, Ewan, Clarke, Tracy E., Murgia, Matteo, Vrtilek, Jan M., Venturi, Tiziana, David, Laurence P., Raychaudhury, Somak, Athreya, Ramana M.
We present deep Giant Metrewave Radio Telescope (GMRT) radio observations at 240, 330 and 610 MHz of the complex radio source at the center of the NGC1407 galaxy group. Previous GMRT observations at 240 MHz revealed faint, diffuse emission enclosing
Externí odkaz:
http://arxiv.org/abs/1206.5751
Autor:
Giacintucci, Simona, O'Sullivan, Ewan, Vrtilek, Jan, David, Laurence P., Raychaudhury, Somak, Venturi, Tiziana, Athreya, Ramana M., Clarke, Tracy, Murgia, Matteo, Mazzotta, Pasquale, Gitti, Myriam, Ponman, Trevor, Ishwara-Chandra, C. H., Jones, Christine, Forman, William R.
We present new Giant Metrewave Radio Telescope observations at 235 MHz and 610 MHz of 18 X-ray bright galaxy groups. These observations are part of an extended project, presented here and in future papers, which combines low-frequency radio and X-ray
Externí odkaz:
http://arxiv.org/abs/1103.1364
Autor:
Clarke, Tracy E., Enßlin, Torsten, Finoguenov, Alexis, Intema, Huib, Pfrommer, Christoph, van Weeren, Reinout, Röttgering, Huub, Oonk, Raymond
Abell 2256 is a rich, nearby (z=0.0594) galaxy cluster that has significant evidence of merger activity. We present new radio and X-ray observations of this system. The low-frequency radio images trace the diffuse synchrotron emission of the Mpc-scal
Externí odkaz:
http://arxiv.org/abs/1102.5539
Autor:
Cohen, Aaron, Clarke, Tracy E
We present newly discovered radio emission in the galaxy cluster Abell 2443 which is (1) diffuse, (2) extremely steep spectrum, (3) offset from the cluster center, (4) of irregular morphology and (5) not clearly associated with any of the galaxies wi
Externí odkaz:
http://arxiv.org/abs/1102.4606
Autor:
Wik, Daniel R., Sarazin, Craig L., Finoguenov, Alexis, Baumgartner, Wayne H., Mushotzky, Richard F., Okajima, Takashi, Tueller, Jack, Clarke, Tracy E.
The Coma cluster of galaxies hosts the brightest radio halo known and has therefore been the target of numerous searches for associated inverse Compton (IC) emission, particularly at hard X-ray energies where the IC signal must eventually dominate ov
Externí odkaz:
http://arxiv.org/abs/1012.0003