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Start Over Author "Novara, G" Journal monthly notices of the royal astronomical society
8 results on '"Novara, G"'

2. Erratum: The afterglow and kilonova of the short GRB 160821B

Author

Troja, E, primary, Castro-Tirado, A J, additional, González, J Becerra, additional, Hu, Y, additional, Ryan, G S, additional, Cenko, S B, additional, Ricci, R, additional, Novara, G, additional, Sánchez-Rámirez, R, additional, Acosta-Pulido, J A, additional, Ackley, K D, additional, García, M D Caballero, additional, Eikenberry, S S, additional, Guziy, S, additional, Jeong, S, additional, Lien, A Y, additional, Márquez, I, additional, Pandey, S B, additional, Park, I H, additional, Sakamoto, T, additional, Tello, J C, additional, Sokolov, I V, additional, Sokolov, V V, additional, Tiengo, A, additional, Valeev, A F, additional, Zhang, B B, additional, and Veilleux, S, additional

Published
2019
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3. The afterglow and kilonova of the short GRB 160821B

Author

Troja, E, primary, Castro-Tirado, A J, additional, González, J Becerra, additional, Hu, Y, additional, Ryan, G S, additional, Cenko, S B, additional, Ricci, R, additional, Novara, G, additional, Sánchez-Rámirez, R, additional, Acosta-Pulido, J A, additional, Ackley, K D, additional, Caballero García, M D, additional, Eikenberry, S S, additional, Guziy, S, additional, Jeong, S, additional, Lien, A Y, additional, Márquez, I, additional, Pandey, S B, additional, Park, I H, additional, Sakamoto, T, additional, Tello, J C, additional, Sokolov, I V, additional, Sokolov, V V, additional, Tiengo, A, additional, Valeev, A F, additional, Zhang, B B, additional, and Veilleux, S, additional

Published
2019
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4. A long-lived neutron star merger remnant in GW170817: constraints and clues from X-ray observations

Author

Piro, L, primary, Troja, E, additional, Zhang, B, additional, Ryan, G, additional, van Eerten, H, additional, Ricci, R, additional, Wieringa, M H, additional, Tiengo, A, additional, Butler, N R, additional, Cenko, S B, additional, Fox, O D, additional, Khandrika, H G, additional, Novara, G, additional, Rossi, A, additional, and Sakamoto, T, additional

Published
2018
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5. long-lived neutron star merger remnant in GW170817: constraints and clues from X-ray observations.

Author

Piro, L, Troja, E, Zhang, B, Ryan, G, van Eerten, H, Ricci, R, Wieringa, M H, Tiengo, A, Butler, N R, Cenko, S B, Fox, O D, Khandrika, H G, Novara, G, Rossi, A, and Sakamoto, T

Subjects
NEUTRON stars, SUPERNOVA remnants, ASTRONOMICAL observations, GAMMA ray bursts, BLACK holes
Abstract

Multimessenger observations of GW170817 have not conclusively established whether the merger remnant is a black hole (BH) or a neutron star (NS). We show that a long-lived magnetized NS with a poloidal field B ≈ 1012 G is fully consistent with the electromagnetic dataset, when spin-down losses are dominated by gravitational wave (GW) emission. The required ellipticity ε ≳ 10−5 can result from a toroidal magnetic field component much stronger than the poloidal component, a configuration expected from an NS newly formed from a merger. Abrupt magnetic dissipation of the toroidal component can lead to the appearance of X-ray flares, analogous to the one observed in gamma-ray burst (GRB) afterglows. In the X-ray afterglow of GW170817, we identify a low-significance (≳3σ) temporal feature at 155 d, consistent with a sudden reactivation of the central NS. Energy injection from the NS spin-down into the relativistic shock is negligible, and the underlying continuum is fully accounted for by a structured jet seen off-axis. Whereas radio and optical observations probe the interaction of this jet with the surrounding medium, observations at X-ray wavelengths, performed with adequate sampling, open a privileged window on to the merger remnant. [ABSTRACT FROM AUTHOR]

Published
2019
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7. Multiwavelength observations of 1RXH J173523.7−354013: revealing an unusual bursting neutron star

Author

Degenaar, N., primary, Jonker, P. G., additional, Torres, M. A. P., additional, Kaur, R., additional, Rea, N., additional, Israel, G. L., additional, Patruno, A., additional, Trap, G., additional, Cackett, E. M., additional, D'Avanzo, P., additional, Lo Curto, G., additional, Novara, G., additional, Krimm, H., additional, Holland, S. T., additional, De Luca, A., additional, Esposito, P., additional, and Wijnands, R., additional

Published
2010
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8. XMM–Newton and Swift observations prove GRB 090709A to be a distant, standard, long GRB.

Author

De Luca, A., Esposito, P., Israel, G. L., Götz, D., Novara, G., Tiengo, A., and Mereghetti, S.

Subjects
GAMMA rays, X-rays, EMISSIONS (Air pollution), ABSORPTION, DENSITY
Abstract

GRB 090709A is a long gamma-ray burst (GRB) discovered by Swift, featuring a bright X-ray afterglow as well as a faint infrared transient with very red and peculiar colours. The burst attracted a large interest because of a possible quasi-periodicity at in the prompt emission, suggesting that it could have a different origin with respect to standard, long GRBs. In order to understand the nature of this burst, we obtained a target of opportunity observation with XMM–Newton. X-ray spectroscopy, based on XMM–Newton and Swift data, allowed us to model the significant excess in photoelectric absorption with respect to the Galactic value as due to a large column density in the GRB host, located at . Such a picture is also consistent with the infrared transient's properties. Re-analysis of the prompt emission, based on International Gamma-Ray Astrophysics Laboratory and on Swift data, excludes any significant modulation at . Thus, we conclude that GRB 090709A is a distant, standard, long GRB. [ABSTRACT FROM AUTHOR]

Published
2010
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