Zobrazeno 1 - 10
of 191
pro vyhledávání: '"Kassim, N. E."'
Typically, integrated radio frequency continuum spectra of supernova remnants (SNRs) exhibit a power-law form due to their synchrotron emission. In numerous cases, these spectra show an exponential turnover, long assumed due to thermal free-free abso
Externí odkaz:
http://arxiv.org/abs/2312.11440
We present new images and continuum spectral analysis for 14 resolved Galactic SNRs selected from the 74 MHz Very Large Array Low-Frequency Sky Survey Redux (VLSSr). We combine new integrated measurements from the VLSSr with flux densities extracted
Externí odkaz:
http://arxiv.org/abs/2108.08178
Autor:
Timmerman, R., van Weeren, R. J., Callingham, J. R., Cotton, W. D., Perley, R., Morabito, L. K., Gizani, N. A. B., Bridle, A. H., O'Dea, C. P., Baum, S. A., Tremblay, G. R., Kharb, P., Kassim, N. E., Röttgering, H. J. A., Botteon, A., Sweijen, F., Tasse, C., Brüggen, M., Moldon, J., Shimwell, T., Brunetti, G.
The prominent radio source Hercules A features complex structures in its radio lobes. Although it is one of the most comprehensively studied sources in the radio sky, the origin of the ring structures in the Hercules A radio lobes remains an open que
Externí odkaz:
http://arxiv.org/abs/2108.07287
Autor:
Hyman, S. D., Frail, D. A., Deneva, J. S., Kassim, N. E., Giacintucci, S., Kooi, J. E., Lazio, T. J. W., Joyner, I., Peters, W. M., Gajjar, V., Siemion, A. P. V.
From an on-going survey of the Galactic bulge, we have discovered a number of compact, steep spectrum radio sources. In this present study we have carried out more detailed observations for two of these sources, located 43 arcmin and 12.7 deg from th
Externí odkaz:
http://arxiv.org/abs/2105.03282
Autor:
Anderson, M. M., Hallinan, G., Eastwood, M. W., Monroe, R. M., Callister, T. A., Dowell, J., Hicks, B., Huang, Y., Kassim, N. E., Kocz, J., Lazio, T. J. W., Price, D. C., Schinzel, F. K., Taylor, G. B.
Publikováno v:
ApJ, 2019 November, Volume 886, Number 2
We present the results of the first transient survey from the Owens Valley Radio Observatory Long Wavelength Array (OVRO-LWA) using 31 hr of data, in which we place the most constraining limits on the instantaneous transient surface density at timesc
Externí odkaz:
http://arxiv.org/abs/1911.04591
We have identified a new supernova remnant (SNR), G51.04+0.07 (G51.04), using observations at 74 MHz from the VLA Low-Frequency Sky Survey Redux. Earlier, higher frequency radio continuum, recombination line, and infrared data had correctly inferred
Externí odkaz:
http://arxiv.org/abs/1806.07452
Autor:
Hallinan, G., Corsi, A., Mooley, K. P., Hotokezaka, K., Nakar, E., Kasliwal, M. M., Kaplan, D. L., Frail, D. A., Myers, S. T., Murphy, T., De, K., Dobie, D., Allison, J. R., Bannister, K. W., Bhalerao, V., Chandra, P., Clarke, T. E., Giacintucci, S., Ho, A. Y. Q., Horesh, A., Kassim, N. E., Kulkarni, S. R., Lenc, E., Lockman, F. J., Lynch, C., Nichols, D., Nissanke, S., Palliyaguru, N., Peters, W. M., Piran, T., Rana, J., Sadler, E. M., Singer, L. P.
Gravitational waves have been detected from a binary neutron star merger event, GW170817. The detection of electromagnetic radiation from the same source has shown that the merger occurred in the outskirts of the galaxy NGC 4993, at a distance of 40
Externí odkaz:
http://arxiv.org/abs/1710.05435
Autor:
Polisensky, E., Lane, W. M., Hyman, S. D., Kassim, N. E., Giacintucci, S., Clarke, T. E., Cotton, W. D., Cleland, E., Frail, D. A.
We report on a search for radio transients at 340 MHz with the Jansky Very Large Array (VLA) Low band Ionospheric and Transient Experiment (VLITE). Between 2015 July 29 and 2015 September 27, operating in commensal mode, VLITE imaged approximately 28
Externí odkaz:
http://arxiv.org/abs/1604.00667
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Autor:
Lane, W. M., Cotton, W. D., van Velzen, S., Clarke, T. E., Kassim, N. E., Helmboldt, J. F., Lazio, T. J. W., Cohen, A. S.
We present the results of a recent re-reduction of the data from the Very Large Array (VLA) Low-frequency Sky Survey (VLSS). We used the VLSS catalog as a sky model to correct the ionospheric distortions in the data and create a new set of sky maps a
Externí odkaz:
http://arxiv.org/abs/1404.0694