Zobrazeno 1 - 10
of 400
pro vyhledávání: '"Kotze, M."'
Autor:
Paice, J. A., Gandhi, P., Charles, P. A., Dhillon, V. S., Marsh, T. R., Buckley, D. A. H., Kotze, M. M., Beri, A., Altamirano, D., Middleton, M. J., Plotkin, R. M., Miller-Jones, J. C. A., Russell, D., Tomsick, J., Díaz-Merced, W., Misra, R.
We present rapid, multiwavelength photometry of the low-mass X-ray binary Swift J1357.2-0933 during its 2017 outburst. Using several sets of quasi-simultaneous ULTRACAM/NTT (optical), NuSTAR (X-ray), XRT/Swift (X-ray), SALT (optical) and ATCA (radio)
Externí odkaz:
http://arxiv.org/abs/1905.09784
Autor:
Fender, R., Woudt, P. A., Armstrong, R., Groot, P., McBride, V., Miller-Jones, J., Mooley, K., Stappers, B., Wijers, R., Bietenholz, M., Blyth, S., Bottcher, M., Buckley, D., Charles, P., Chomiuk, L., Coppejans, D., Corbel, S., Coriat, M., Daigne, F., de Blok, W. J. G., Falcke, H., Girard, J., Heywood, I., Horesh, A., Horrell, J., Jonker, P., Joseph, T., Kamble, A., Knigge, C., Koerding, E., Kotze, M., Kouveliotou, C., Lynch, C., Maccarone, T., Meintjes, P., Migliari, S., Murphy, T., Nagayama, T., Nelemans, G., Nicholson, G., O'Brien, T., Oodendaal, A., Oozeer, N., Osborne, J., Perez-Torres, M., Ratcliffe, S., Ribeiro, V., Rol, E., Rushton, A., Scaife, A., Schurch, M., Sivakoff, G., Staley, T., Steeghs, D., Stewart, I., Swinbank, J., van der Heyden, K., van der Horst, A., van Soelen, B., Vergani, S., Warner, B., Wiersema, K.
ThunderKAT is the image-plane transients programme for MeerKAT. The goal as outlined in 2010, and still today, is to find, identify and understand high-energy astrophysical processes via their radio emission (often in concert with observations at oth
Externí odkaz:
http://arxiv.org/abs/1711.04132
Autor:
Middleton, M. J., Casella, P., Gandhi, P., Bozzo, E., Anderson, G., Degenaar, N., Donnarumma, I., Israel, G., Knigge, C., Lohfink, A., Markoff, S., Marsh, T., Rea, N., Tingay, S., Wiersema, K., Altamirano, D., Bhattacharya, D., Brandt, W. N., Carey, S., Charles, P., Trigo, M. Diaz, Done, C., Kotze, M., Eikenberry, S., Fender, R., Ferruit, P., Fuerst, F., Greiner, J., Ingram, A., Heil, L., Jonker, P., Komossa, S., Leibundgut, B., Maccarone, T., Malzac, J., McBride, V., Miller-Jones, J., Page, M., Rossi, E. M., Russell, D. M., Shahbaz, T., Sivakoff, G. R., Tanaka, M., Thompson, D. J., Uemura, M., Uttley, P., van Moorsel, G., Van Doesburgh, M., Warner, B., Wilkes, B., Wilms, J., Woudt, P.
Whilst astronomy as a science is historically founded on observations at optical wavelengths, studying the Universe in other bands has yielded remarkable discoveries, from pulsars in the radio, signatures of the Big Bang at submm wavelengths, through
Externí odkaz:
http://arxiv.org/abs/1709.03520
Autor:
Kennedy, M. R., Garnavich, P. M., Littlefield, C., Callanan, P., Mukai, K., Aadland, E., Kotze, M. M., Kotze, E. J.
We present the first ever X-ray data taken of an intermediate polar, FO Aqr, when in a low accretion state and during the subsequent recovery. The Swift and Chandra X-ray data taken during the low accretion state in July 2016 both show a softer spect
Externí odkaz:
http://arxiv.org/abs/1704.01909
Autor:
Santander-García, M., Rodríguez-Gil, P., Corradi, R. L. M., Jones, D., Miszalski, B., Boffin, H. M. J., Rubio-Díez, M. M., Kotze, M. M.
Publikováno v:
Nature, Volume 519, Issue 7541, pp. 63-65 (2015)
The planetary nebula (PN) stage is the ultimate fate of stars with mass 1 to 8 solar masses (M$_\odot$). The origin of their complex morphologies is poorly understood, although several mechanisms involving binary interaction have been proposed. In cl
Externí odkaz:
http://arxiv.org/abs/1609.00178
Autor:
Gorbovskoy, E. S., Lipunov, V. M., Buckley, D., Kornilov, V. G., Balanutsa, P. V., Tyurina, N. V., Kuznetsov, A. S., Kuvshinov, D. A., Gorbunov, I. A., Vlasenko, D., Popova, E., Chazov, V. V., Potter, S., Kotze, M., Kniazev, A., Gress, O. A., Budnev, N. M., Ivanov, K. I., Yazev, S. A., Tlatov, A. G., Senik, V. A., Dormidontov, D. V., Parhomenko, A. V., Krushinski, V. V., Zalozhnich, I. S., Castro-Tirado, R. Alberto, Sanchez-Ramrez, R., Sergienko, Yu. P., Gabovich, A., Yurkov, V. V., Levato, H., Saffe, C., Mallamaci, C., Lopez, C., Podest, F.
We report early optical linear polarization observations of two gamma-ray bursts made with the MASTER robotic telescope network. We found the minimum polar- ization for GRB150301B to be 8% at the beginning of the initial stage, whereas we detected no
Externí odkaz:
http://arxiv.org/abs/1511.02641
Autor:
de Martino, D., Casares, J., Mason, E., Buckley, D. A. H., Kotze, M. M., Bonnet-Bidaud, J. -M., Mouchet, M., Coppejans, R., Gulbis, A. A. S.
The peculiar low mass X-ray binary XSSJ12270-4859, associated with the Fermi/LAT source 2FGLJ1227.7-4853, was in a X-ray, gamma-ray and optical low-luminosity persistent state for about a decade until the end of 2012, when it has entered into the dim
Externí odkaz:
http://arxiv.org/abs/1408.6138
Autor:
Coppejans, D. L., Woudt, P. A., Warner, B., Koerding, E., Macfarlane, S. A., Schurch, M. P. E., Kotze, M. M., Breytenbach, H. B., Gulbis, A. A. S., Coppejans, R.
Time series photometry of 20 Cataclysmic Variables detected by the Catalina Real-time Transient Survey is presented. 14 of these systems have not been observed previously and only two have been examined in-depth. From the observations we determined 1
Externí odkaz:
http://arxiv.org/abs/1310.3642
We present photometric and spectroscopic observations of the low mass X-ray binary GR Mus (XB 1254-690), and find strong evidence for the presence of a negative superhump with a period that is 2.4+/-0.3% shorter than the orbital. This provides furthe
Externí odkaz:
http://arxiv.org/abs/1309.4972
Autor:
Kotze, M. M., Charles, P. A.
Long-term ("superorbital") periods or modulations have been detected in a wide variety of both low and high-mass X-ray binaries at X-ray and optical wavelengths. A variety of mechanisms have been proposed to account for the variability properties, su
Externí odkaz:
http://arxiv.org/abs/1111.1296