Search Results - "Monageng, I. M"

Radio afterglows of very high-energy gamma-ray bursts 190829A and 180720B by Rhodes, L, van der Horst, A J, Fender, R, Monageng, I M, Anderson, G E, Antoniadis, J, Bietenholz, M F, Böttcher, M, Bright, J S, Green, D A, Kouveliotou, C, Kramer, M, Motta, S E, Wijers, R A M J, Williams, D R A, Woudt, P A

“…ABSTRACT We present high-cadence multifrequency radio observations of the long gamma-ray burst (GRB) 190829A, which was detected at photon energies above 100…”
Get full text

Discovery of a Rare Eclipsing Be/X-Ray Binary System, Swift J010902.6-723710 = SXP 182 by Gaudin, Thomas M., Kennea, Jamie A., Coe, M. J., Monageng, I. M., Udalski, Andrzej, Townsend, L. J., Buckley, David A. H., Evans, Phil A.

“…Abstract We report on the discovery of Swift J010902.6-723710, a rare eclipsing Be/X-ray Binary system by the Swift SMC Survey (S-CUBED). Swift…”
Get full text

Spectropolarimetry and photometry of the early afterglow of the gamma-ray burst GRB 191221B by Buckley, D A H, Bagnulo, S, Britto, R J, Mao, J, Kann, D A, Cooper, J, Lipunov, V, Hewitt, D M, Razzaque, S, Kuin, N P M, Monageng, I M, Covino, S, Jakobsson, P, van der Horst, A J, Wiersema, K, Böttcher, M, Campana, S, D’Elia, V, Gorbovskoy, E S, Gorbunov, I, Groenewald, D N, Hartmann, D H, Kornilov, V G, Mundell, C G, Podesta, R, Thomas, J K, Tyurina, N, Vlasenko, D, van Soelen, B, Xu, D

“…ABSTRACT We report on results of spectropolarimetry of the afterglow of the long gamma-ray burst GRB 191221B, obtained with SALT/RSS and VLT/FORS2, as well as…”
Get full text

A major optical and X-ray outburst from the Magellanic Bridge source RX J0209.6–7427 by Coe, M J, Monageng, I M, Bartlett, E S, Buckley, D A H, Udalski, A

“…ABSTRACT RX J0209.6–7427 is an X-ray source in the Magellanic Bridge that was first detected in 1993, but not seen again till 2019. It has been identified as a…”
Get full text

On the relationship between circumstellar disc size and X-ray outbursts in Be/X-ray binaries by Monageng, I M, McBride, V A, Coe, M J, Steele, I A, Reig, P

“…We present long-term Ha monitoring results of five Be/X-ray binaries to study the Be disc size variations and their influence on type II (giant) X-ray…”
Get full text

Ton S 415: a close binary containing an intermediate helium subdwarf discovered with SALT and TESS by Snowdon, E J, Jeffery, C S, Schlagenhauf, S, Dorsch, M, Monageng, I M

“…ABSTRACT Hot subdwarfs are early-type low-mass stars lying between the main sequence and the white dwarf sequence. The majority have helium-burning cores and…”
Get full text

A rare outburst from the stealthy BeXRB system Swift J0549.7−6812 by Coe, M J, Kennea, J A, Monageng, I M, Buckley, D A H, Udalski, A, Evans, P A

“…ABSTRACT Swift J0549.7−6812 is a Be/X-ray binary system (BeXRB) in the Large Magellanic Cloud (LMC) exhibiting an ∼6 s pulse period. Like many such systems,…”
Get full text

Improved binary solution for the gamma-ray binary 1FGL J1018.6-5856 by van Soelen, B, Mc Keague, S, Malyshev, D, Chernyakova, M, Komin, N, Matchett, N, Monageng, I M

“…ABSTRACT The gamma-ray binary 1FGL J1018.6-5856 consists of an O6V((f)) type star and an unknown compact object, and shows orbitally modulated emission from…”
Get full text

CXOU J005245.0−722844: discovery of a Be star/white dwarf binary system in the SMC via a very fast, super-Eddington X-ray outburst event by Gaudin, T M, Coe, M J, Kennea, J A, Monageng, I M, Buckley, D A H, Udalski, A, Evans, P A

“…ABSTRACT CXOU J005245.0−722844 is an X-ray source in the Small Magellanic Cloud (SMC) that has long been known as a Be/X-ray binary (BeXRB) star, containing an…”
Get full text

Radio observations of the 2022 outburst of the transitional Z-Atoll source XTE J1701−462 by Gasealahwe, K V S, Monageng, I M, Fender, R P, Woudt, P A, Hughes, A K, Motta, S E, van den Eijnden, J, Saikia, P, Tremou, E

“…ABSTRACT XTE J1701−462 is a neutron star low-mass X-ray binary (NS LMXB) discovered in 2006 as the first system to demonstrate unambiguously that the ‘Atoll’…”
Get full text

The 2022 super-Eddington outburst of the source SMC X-2 by Coe, M J, Kennea, J A, Monageng, I M, Townsend, L J, Buckley, D A H, Williams, M, Udalski, A, Evans, P A

“…ABSTRACT SMC X-2 exhibits X-ray outburst behaviour that makes it one of the most luminous X-ray sources in the Small Magellanic Cloud. In the last decade it…”
Get full text

4U 1210−64: a new member of the rare intermediate-mass X-ray binary subclass by Monageng, I M, McBride, V A, Alfonso-Garzon, J, Townsend, L J, Coley, J B, Montesinos, B, Corbet, R H D, Pottschmidt, K

“…ABSTRACT 4U 1210−64 is a peculiar X-ray binary that was first discovered in 1978 by the Uhuru satellite. The analysis of the X-ray data revealed a 6.7-d…”
Get full text

A helium-burning white dwarf binary as a supersoft X-ray source by Greiner, J., Maitra, C., Haberl, F., Willer, R., Burgess, J. M., Langer, N., Bodensteiner, J., Buckley, D. A. H., Monageng, I. M., Udalski, A., Ritter, H., Werner, K., Maggi, P., Jayaraman, R., Vanderspek, R.

“…Type Ia supernovae are cosmic distance indicators 1 , 2 , and the main source of iron in the Universe 3 , 4 , but their formation paths are still debated…”
Get full text

SXP 15.6 – an accreting pulsar close to spin equilibrium? by Coe, M J, Monageng, I M, Kennea, J A, Buckley, D A H, Evans, P A, Udalski, A, Groot, Paul, Bloemen, Steven, Vreeswijk, Paul, McBride, Vanessa, Klein-Wolt, Marc, Woudt, Patrick, Körding, Elmar, Le Poole, Rudolf, Pieterse, Danielle

“…ABSTRACT SXP 15.6  is a recently established Be star X-ray binary system in the Small Magellanic Cloud (SMC). Like many such systems, the variable X-ray…”
Get full text

Radio flaring and dual radio loud/quiet behaviour in the new candidate black hole X-ray binary MAXI J1631-472 by Monageng, I M, Motta, S E, Fender, R, Yu, W, A Woudt, P, Tremou, E, Miller-Jones, J C A, van der Horst, A J

“…ABSTRACT We present the results of a weekly monitoring of the new black hole candidate X-ray binary MAXI J1631-472 carried out with the MeerKAT radio…”
Get full text

Discovery of a magnetar candidate X-ray pulsar in the Large Magellanic Cloud by Imbrogno, M, Israel, G L, Rodríguez Castillo, G A, Buckley, D A H, Coti Zelati, F, Rea, N, Monageng, I M, Casella, P, Stella, L, Haberl, F, Esposito, P, Tombesi, F, De Luca, A, Tiengo, A

“…ABSTRACT During a systematic search for new X-ray pulsators in the XMM–Newton archive, we discovered a high amplitude ($PF\simeq 86~{{\ \rm per\ cent}}$)…”
Get full text

The newly discovered Be/X-ray binary Swift J004516.6–734703 in the SMC: witnessing the emergence of a circumstellar disc by Kennea, J A, Coe, M J, Evans, P A, Monageng, I M, Townsend, L J, Siegel, M H, Udalski, A, Buckley, D A H

“…ABSTRACT We report on the discovery of Swift J004516.6–734703, a Be/X-ray binary system by the Swift SMC Survey, S-CUBED. Swift J004516.6–734703, or SXP 146.6,…”
Get full text

RX J0529.8−6556: a BeXRB pulsar with an evolving optical period and out of phase X-ray outbursts by Treiber, H, Vasilopoulos, G, Bailyn, C D, Haberl, F, Gendreau, K C, Ray, P S, Maitra, C, Maggi, P, Jaisawal, G K, Udalski, A, Wilms, J, Monageng, I M, Buckley, D A H, König, O, Carpano, S

“…ABSTRACT We report the results of eROSITA and NICER observations of the 2020 June outburst of the Be/X-ray binary pulsar RX J0529.8−6556 in the Large…”
Get full text

The 2019 outburst of AMXP SAX J1808.4–3658 and radio follow up of MAXI J0911–655 and XTE J1701–462 by Gasealahwe, K V S, Monageng, I M, Fender, R P, Woudt, P A, Motta, S E, van den Eijnden, J, Williams, D R A, Heywood, I, Bloemen, S, Groot, P J, Vreeswijk, P, McBride, V, Klein-Wolt, M, Körding, E, Le Poole, R, Pieterse, D, de Wet, S

“…ABSTRACT We present radio coverage of the 2019 outburst of the accreting millisecond X-ray pulsar (AMXP) SAX J1808.4–3658, obtained with MeerKAT. We compare…”
Get full text

The Orbit of the Gamma-Ray Binary 1FGL J1018.6−5856 by Monageng, I. M., McBride, V. A., Townsend, L. J., Kniazev, A. Y., Mohamed, S., Böttcher, M.

“…Gamma-ray binaries are a small subclass of the high mass X-ray binary population that exhibit emission across the whole electromagnetic spectrum. We present…”
Get full text