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Start Over Author "Cummings, J. R" Publication Type Conference Materials
12 results on '"Cummings, J. R"'

1. Probing the Nature of Short Swift Bursts via Deep INTEGRAL Monitoring of GRB 050925

Author

Sakamoto, T., primary, Barbier, L., additional, Barthelmy, S. D., additional, Cummings, J. R., additional, Fenimore, E. E., additional, Gehrels, N., additional, Krimm, H. A., additional, Markwardt, C. B., additional, Palmer, D. M., additional, Parsons, A. M., additional, Sato, G., additional, Stamatikos, M., additional, Tueller, J., additional, Meegan, Charles, additional, Kouveliotou, Chryssa, additional, and Gehrels, Neil, additional

Published
2009
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2. GRB 070318: A Case of Prompt Emission from the External Shock?

Author

Chester, M. M., primary, Wang, X. Y., additional, Cummings, J. R., additional, Grupe, D., additional, Hunsberger, S. D., additional, La Parola, V., additional, Marshall, F. E., additional, Mineo, T., additional, Oates, S. R., additional, Page, M. J., additional, Roming, P., additional, Galassi, M., additional, Palmer, David, additional, and Fenimore, Ed, additional

Published
2008
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3. MEASUREMENT OF THE RELATIVE ABUNDANCES OF THE ULTRA-HEAVY GALACTIC COSMIC-RAY ABUNDANCES (30 ≤ Z ≤ 40) WITH TIGER

Author

Rauch, B. F., primary, Barbier, L. M., additional, Binns, W. R., additional, Cummings, J. R., additional, de Nolfo, G. A., additional, Geier, S., additional, Israel, M. H., additional, Link, J. T., additional, Mewaldt, R. A., additional, Mitchell, J. W., additional, Schindler, S. M., additional, Scott, L. M., additional, Stone, E. C., additional, Streitmatter, R. E., additional, and Waddington, C. J., additional

Published
2007
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4. A Tale of Two Faint Bursts: GRB 050223 and GRB 050911

Author

Page, K. L., primary, Barthelmy, S. D., additional, Beardmore, A. P., additional, Burrows, D. N., additional, Campana, S., additional, Chincharini, G., additional, Cummings, J. R., additional, Cusumano, G., additional, Gehrels, N., additional, Giommi, P., additional, Goad, M. R., additional, Godet, O., additional, Graham, J., additional, Kaneko, Y., additional, Kennea, J. A., additional, Mangano, V., additional, Markwardt, C. B., additional, O’Brien, P. T., additional, Osborne, J. P., additional, Reichart, D. E., additional, Rol, E., additional, Sakamoto, T., additional, Tagliaferri, G., additional, Tanvir, N. R., additional, Wells, A. A., additional, and Zhang, B., additional

Published
2007
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5. A Tale of Two Faint Bursts: GRB 050223 and GRB 050911.

Author

Page, K. L., Barthelmy, S. D., Beardmore, A. P., Burrows, D. N., Campana, S., Chincharini, G., Cummings, J. R., Cusumano, G., Gehrels, N., Giommi, P., Goad, M. R., Godet, O., Graham, J., Kaneko, Y., Kennea, J. A., Mangano, V., Markwardt, C. B., O'Brien, P. T., Osborne, J. P., and Reichart, D. E.

Subjects
STARBURSTS, X-ray binaries, BINARY stars, X-ray astronomy, REDSHIFT
Abstract

GRBs 050223 and 050911 are examples of Swift bursts with two of the faintest X-ray afterglows at (relatively) early times. While a faint, fading X-ray afterglow was located for GRB 050223, GRB 050911 was not detected, making any X-ray afterglow extremely faint. The faintness of the afterglow of GRB 050223 could be explained by a large opening or viewing angle, or by the burst being at high redshift. The non-detection of GRB 050911 may indicate the burst occurred in a low-density environment, or, alternatively, was due to a compact object merger, in spite of the apparent long duration of the burst. © 2007 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2007
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6. A Tale of Two Faint Bursts: GRB 050223 and GRB 050911.

Author

Page, K. L., Barthelmy, S. D., Beardmore, A. P., Burrows, D. N., Campana, S., Chincharini, G., Cummings, J. R., Cusumano, G., Gehrels, N., Giommi, P., Goad, M. R., Godet, O., Graham, J., Kaneko, Y., Kennea, J. A., Mangano, V., Markwardt, C. B., O'Brien, P. T., Osborne, J. P., and Reichart, D. E.

Subjects
GAMMA ray bursts, GAMMA rays, OPTICAL instruments, REDSHIFT, ASTRONOMY, PHYSICS
Abstract

GRBs 050223 and 050911 were discovered by the Swift Burst Alert Telescope (BAT) on 23rd February and 11th September 2005 respectively. The observation of GRB 050223 showed a faint, fading X-ray source, which was identified as the afterglow; GRB 050911, however, was not detected, making any X-ray afterglow extremely faint. The faintness of the afterglow of GRB 050223 could be explained by a large opening or viewing angle, or by the burst being at high redshift. The non-detection of GRB 050911 may indicate the burst occurred in a low-density environment, or, alternatively, was due to a compact object merger, in spite of the apparent long duration of the burst. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2006
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7. Co/Ni element ratio in the galactic cosmic rays between 0.8 and 4.3 GeV/nucleon.

Author

Sposato, S. H., Barbier, L. M., Binns, W. R., Christian, E. R., Cummings, J. R., deNolfo, G. A., Hink, P. L., Israel, M. H., Mewaldt, R. A., Mitchell, J. W., Schindler, S. M., Streitmatter, R. E., and Waddington, C. J.

Subjects
COSMIC abundances, NUCLEAR physics
Abstract

In a one-day balloon flight of the Trans-Iron Galactic Element Recorder (TIGER) in 1997, the instrument achieved excellent charge resolution for elements near the Fe peak, permitting a new measurement of the element ratio Co/Ni. The best fit to the data, extrapolated to the top of the atmosphere, gives an upper limit for this ratio of 0.093 ± 0.037 over the energy interval 0.8 to 4.3 GeV/nucleon; because a Co peak is not seen in the data, this result is given as an upper limit. Comparing this upper limit with calculations by Webber & Gupta [14] suggests that at the source of these cosmic rays a substantial amount of the electron-capture isotope [sup 59]Ni survived. This conclusion is in conflict with the clear evidence from ACE/CRIS below 0.5 GeV/nucleon that there is negligible [sup 59]Ni surviving at the source. Possible explanations for this apparent discrepancy are discussed. [ABSTRACT FROM AUTHOR]

Published
2000

8. Ultra heavy (Z>30) and heavy (10≤Z≤30) cosmic-ray measurements on ACCESS with the charge (Z) identification module (ZIM)

Author

Binns, W. R., primary, Adams, J. H., additional, Barbier, L. M., additional, Christian, E. R., additional, Cummings, J. R., additional, DeNolfo, G. A., additional, Hink, P. L., additional, Israel, M. H., additional, Krizmanic, J. F., additional, Leske, R. A., additional, Menn, W., additional, Mewaldt, R. A., additional, Mitchell, J. W., additional, Schindler, S. M., additional, Simon, M., additional, Sposato, S. H., additional, Waddington, C. J., additional, and Wiedenbeck, M. E., additional

Published
1999
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11. New magnetospheric results from the SAMPEX mission

Author

Baker, D. N., primary, Blake, J. B., additional, Callis, L. B., additional, Cummings, J. R., additional, Hovestadt, D., additional, Kanekal, S., additional, Klecker, B., additional, Mewaldt, R. A., additional, and Nakamura, R., additional

Published
1996
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