Zobrazeno 1 - 10
of 116
pro vyhledávání: '"Langston, G"'
Autor:
Martin, J. R., Reichart, D. E., Dutton, D. A., Maples, M. P., Berger, T. A., Ghigo, F. D., Haislip, J. B., Shaban, O. H., Trotter, A. S., Barnes, L. M., Paggen, M. L., Gao, R. L., Salemi, C. P., Langston, G. I., Bussa, S., Duncan, J. A., White, S., Heatherly, S. A., Karlik, J. B., Johnson, E. M., Reichart, J. E., Foster, A. C., Kouprianov, V. V., Mazlin, S., Harvey, J.
We present a single-dish mapping algorithm with a number of advantages over traditional techniques. (1) Our algorithm makes use of weighted modeling, instead of weighted averaging, to interpolate between signal measurements. This smooths the data, bu
Externí odkaz:
http://arxiv.org/abs/1808.06128
Akademický článek
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We report deep Green Bank Telescope spectroscopy in the redshifted HI 21cm and OH 18cm lines from the $z = 0.765$ absorption system towards PMN J0134-0931. A comparison between the "satellite" OH 18cm line redshifts, or between the redshifts of the H
Externí odkaz:
http://arxiv.org/abs/1201.3372
Autor:
Mickaliger, M. B., McLaughlin, M. A., Lorimer, D. R., Langston, G. I., Bilous, A. V., Kondratiev, V. I., Ransom, S. M., Crawford, F.
The 43m telescope at the NRAO site in Green Bank, WV has recently been outfitted with a clone of the Green Bank Ultimate Pulsar Processing Instrument (GUPPI \cite{Ransom:2009}) backend, making it very useful for a number of pulsar related studies in
Externí odkaz:
http://arxiv.org/abs/1101.6024
Autor:
Bilous, A. V., Kondratiev, V. I., McLaughlin, M. A., Mickaliger, M., Ransom, S. M., Lyutikov, M., Langston, G. I.
To constrain the giant pulse (GP) emission mechanism and test the model of Lyutikov (2007) for GP emission, we have carried out a campaign of simultaneous observations of the Crab pulsar at gamma-ray (Fermi) and radio (Green Bank Telescope) wavelengt
Externí odkaz:
http://arxiv.org/abs/1101.1434
Autor:
Curran, S. J., Whiting, M. T., Murphy, M. T., Webb, J. K., Bignell, C., Polatidis, A. G., Wiklind, T., Francis, P., Langston, G.
From a survey for redshifted HI 21-cm and OH 18-cm absorption in the hosts of a sample of radio galaxies and quasars, we detect HI in three of the ten and OH in none of the fourteen sources for which useful data were obtained. As expected from our re
Externí odkaz:
http://arxiv.org/abs/1012.1972
Autor:
Bilous, A. V., Kondratiev, V. I., McLaughlin, M. A., Mickaliger, M., Lorimer, D. R., Ransom, S. M., Lyutikov, M., Stappers, B., Langston, G. I.
To constrain the giant pulse (GP) emission mechanism and test the model of Lyutikov (2007) of GP emission, we are carrying out a campaign of simultaneous observations of the Crab pulsar between gamma-rays (Fermi) and radio wavelengths. The correlatio
Externí odkaz:
http://arxiv.org/abs/0912.3944
Publikováno v:
MNRAS 395, 333 (2009)
We report the first attempt to observe the secondary eclipse of a transiting extra-solar planet at radio wavelengths. We observed HD 189733 b with the Robert C. Byrd Green Bank Telescope of the NRAO over about 5.5 hours before, during and after secon
Externí odkaz:
http://arxiv.org/abs/0901.2344
Autor:
Langston, G., Turner, B.
Publikováno v:
Astrophys.J.658:455-461,2007
The $^{13}C$ substitutions of molecule $HC_7N$ were observed in TMC-1 using the J = 12 - 11, J = 13 - 12 rotational transitions in the frequency range 12.4 to 13.6 GHz. We present the first detection the $^{13}C$ isotopic species of $HC_7N$ in the in
Externí odkaz:
http://arxiv.org/abs/astro-ph/0612602
Autor:
Kanekar, N., Carilli, C. L., Langston, G. I., Rocha, G., Combes, F., Subrahmanyan, R., Stocke, J. T., Menten, K. M., Briggs, F. H., Wiklind, T.
Publikováno v:
Phys.Rev.Lett.95:261301,2005
We have detected the four 18cm OH lines from the $z \sim 0.765$ gravitational lens toward PMN J0134-0931. The 1612 and 1720 MHz lines are in conjugate absorption and emission, providing a laboratory to test the evolution of fundamental constants over
Externí odkaz:
http://arxiv.org/abs/astro-ph/0510760