Zobrazeno 1 - 10
of 228
pro vyhledávání: '"Kahn, S M"'
Autor:
Peterson, J. R., Jernigan, J. G., Kahn, S. M., Rasmussen, A. P., Peng, E., Ahmad, Z., Bankert, J., Chang, C., Claver, C., Gilmore, D. K., Grace, E., Hannel, M., Hodge, M., Lorenz, S., Lupu, A., Meert, A., Nagarajan, S., Todd, N., Winans, A., Young, M.
We present a comprehensive methodology for the simulation of astronomical images from optical survey telescopes. We use a photon Monte Carlo approach to construct images by sampling photons from models of astronomical source populations, and then sim
Externí odkaz:
http://arxiv.org/abs/1504.06570
Autor:
Chang, C., Jarvis, M., Jain, B., Kahn, S. M., Kirkby, D., Connolly, A., Krughoff, S., Peng, E., Peterson, J. R.
Publikováno v:
Mon. Not. R. Astron. Soc. 434, 2121 (Sep. 2013)
Future weak lensing surveys potentially hold the highest statistical power for constraining cosmological parameters compared to other cosmological probes. The statistical power of a weak lensing survey is determined by the sky coverage, the inverse o
Externí odkaz:
http://arxiv.org/abs/1305.0793
Autor:
Bard, D., Kratochvil, J. M., Chang, C., May, M., Kahn, S. M., AlSayyad, Y., Ahmad, Z., Bankert, J., Connolly, A., Gibson, R. R., Gilmore, K., Grace, E., Haiman, Z., Hannel, M., Huffenberger, K. M., Jernigan, J. G., Jones, L., Krughoff, S., Lorenz, S., Marshall, S., Meert, A., Nagarajan, S., Peng, E., Peterson, J., Rasmussen, A. P., Shmakova, M., Sylvestre, N., Todd, N., Young, M.
The statistics of peak counts in reconstructed shear maps contain information beyond the power spectrum, and can improve cosmological constraints from measurements of the power spectrum alone if systematic errors can be controlled. We study the effec
Externí odkaz:
http://arxiv.org/abs/1301.0830
Autor:
Chang, C., Marshall, P. J., Jernigan, J. G., Peterson, J. R., Kahn, S. M., Gull, S. F., AlSayyad, Y., Ahmad, Z., Bankert, J., Bard, D., Connolly, A., Gibson, R. R., Gilmore, K., Grace, E., Hannel, M., Hodge, M. A., Jones, L., Krughoff, S., Lorenz, S., Marshall, S., Meert, A., Nagarajan, S., Peng, E., Rasmussen, A. P., Shmakova, M., Sylvestre, N., Todd, N., Young, M.
A main science goal for the Large Synoptic Survey Telescope (LSST) is to measure the cosmic shear signal from weak lensing to extreme accuracy. One difficulty, however, is that with the short exposure time ($\simeq$15 seconds) proposed, the spatial v
Externí odkaz:
http://arxiv.org/abs/1206.1383
Autor:
Chang, C., Kahn, S. M., Jernigan, J. G., Peterson, J. R., AlSayyad, Y., Ahmad, Z., Bankert, J., Bard, D., Connolly, A., Gibson, R. R., Gilmore, K., Grace, E., Hannel, M., Hodge, M. A., Jee, M. J., Jones, L., Krughoff, S., Lorenz, S., Marshall, P. J., Marshall, S., Meert, A., Nagarajan, S., Peng, E., Rasmussen, A. P., Shmakova, M., Sylvestre, N., Todd, N., Young, M.
The complete 10-year survey from the Large Synoptic Survey Telescope (LSST) will image $\sim$ 20,000 square degrees of sky in six filter bands every few nights, bringing the final survey depth to $r\sim27.5$, with over 4 billion well measured galaxie
Externí odkaz:
http://arxiv.org/abs/1206.1378
Publikováno v:
Astrophys.J.707:878-889,2009
We present a large X-ray selected serendipitous cluster survey based on a novel joint analysis of archival Chandra and XMM-Newton data. The survey provides enough depth to reach clusters of flux of $\approx 10^{-14} {ergs} {cm}^{-2} {s}^{-1}$ near $z
Externí odkaz:
http://arxiv.org/abs/0911.1327
We present XMM-Newton Reflection Grating Spectrometer observations of pairs of X-ray emission line profiles from the O star Zeta Pup that originate from the same He-like ion. The two profiles in each pair have different shapes and cannot both be cons
Externí odkaz:
http://arxiv.org/abs/0708.1011
Publikováno v:
Astrophys.J.649:979-991,2006
We present a combined analysis of the X-ray emission of the Capella corona obtained with \textit{XMM-Newton} RGS, \textit{Chandra} HETGS, and LETGS. An improved atomic line database and a new differential emission measure (DEM) deconvolution method a
Externí odkaz:
http://arxiv.org/abs/astro-ph/0606283
Autor:
Beiersdorfer, P., Chen, H., Boyce, K. R., Brown, G. V., Kelley, R. L., Kilbourne, C. A., Porter, F. S., Kahn, S. M.
X-ray emission following charge exchange has been studied on the University of California Lawrence Livermore National Laboratory electron beam ion traps EBIT-I and EBIT-II using a high-resolution microcalorimeter. The measured spectra include the K-s
Externí odkaz:
http://arxiv.org/abs/astro-ph/0506261
Autor:
Steenbrugge, K. C., Kaastra, J. S., Sako, M., Branduardi-Raymont, G., Behar, E., Paerels, F. B. S., Blustin, A. J., Kahn, S. M.
We detect seven distinct absorbing systems in the high-resolution X-ray spectrum of the Seyfert 1 galaxy IC 4329A, taken with XMM-Newton. Firstly we detect absorption due to cold gas in our own Galaxy and warm gas in the Galactic halo or the Local Gr
Externí odkaz:
http://arxiv.org/abs/astro-ph/0411232