Zobrazeno 1 - 10
of 585
pro vyhledávání: '"Shahbaz, T."'
Autor:
Gandhi, P., Borowski, E. S., Byrom, J., Hynes, R. I., Maccarone, T. J., Shaw, A. W., Adegoke, O. K., Altamirano, D., Baglio, M. C., Bhargava, Y., Britt, C. T., Buckley, D. A. H., Buisson, D. J. K., Casella, P., Segura, N. Castro, Charles, P. A., Corral-Santana, J. M., Dhillon, V. S., Fender, R., Gúrpide, A., Heinke, C. O., Igl, A. B., Knigge, C., Markoff, S., Mastroserio, G., McCollough, M. L., Middleton, M., Miller, J. M., Miller-Jones, J. C. A., Motta, S. E., Paice, J. A., Pawar, D. D., Plotkin, R. M., Pradhan, P., Ressler, M. E., Russell, D. M., Russell, T. D., Santos-Sanz, P., Shahbaz, T., Sivakoff, G. R., Steeghs, D., Tetarenko, A. J., Tomsick, J. A., Vincentelli, F. M., George, M., Gurwell, M., Rao, R.
We present mid-infrared (MIR) spectral-timing measurements of the prototypical Galactic microquasar GRS 1915+105. The source was observed with the Mid-Infrared Instrument (MIRI) onboard JWST in June 2023 at a MIR luminosity L(MIR)~10^{36} erg/s excee
Externí odkaz:
http://arxiv.org/abs/2406.18637
Autor:
Panizo-Espinar, G., Muñoz-Darias, T., Padilla, M. Armas, Jiménez-Ibarra, F., Sánchez, D. Mata, Yanes-Rizo, I. V., Alabarta, K., Baglio, M. C., Caruso, E., Casares, J., Corral-Santana, J. M., Lewis, F., Russell, D. M., Saikia, P., Sánchez-Sierras, J., Shahbaz, T., Torres, M. A. P., Vincentelli, F.
Swift J1357.2-0933 is a black hole transient of particular interest due to the optical, recurrent dips found during its first two outbursts (in 2011 and 2017), with no obvious X-ray equivalent. We present fast optical photometry during its two most r
Externí odkaz:
http://arxiv.org/abs/2311.03460
Autor:
Álvarez-Hernández, A., Torres, M. A. P., Rodríguez-Gil, P., Shahbaz, T., Sánchez-Sierras, J., Acosta-Pulido, J. A., Jonker, P. G., Gazeas, K. D., Hakala, P., Corral-Santana, J. M.
We present a dynamical study of the eclipsing intermediate polar XY Ari based on time-resolved near-infrared spectroscopy obtained with the EMIR spectrograph on the 10.4-m Gran Telescopio Canarias. Using main sequence template spectra taken with the
Externí odkaz:
http://arxiv.org/abs/2304.08524
Autor:
Shahbaz, T., Paice, J. A., Rajwade, K. M., Veledina, A., Gandhi., P., Dhillon, V. S., Marsh, T. R., Littlefair, S., Kennedy, M. R., Breton, R. P., Clark, C. J.
We present a rapid timing analysis of optical (HiPERCAM and ULTRACAM) and X-ray (NICER) observations of the X-ray transient Swift J1858.6-0814 during 2018 and 2019. The optical light curves show relatively slow, large amplitude (~1 mags in g$_s$) `bl
Externí odkaz:
http://arxiv.org/abs/2301.06369
Autor:
Pelisoli, Ingrid, Marsh, T. R., Parsons, S. G., Aungwerojwit, A., Ashley, R. P., Breedt, E., Brown, A. J., Dhillon, V. S., Dyer, M. J., Green, M. J., Kerry, P., Littlefair, S. P., Sahman, D. I., Shahbaz, T., Wild, J. F., Chakpor, A., Lakhom, R.
AR Scorpii (AR Sco) is the only radio-pulsing white dwarf known to date. It shows a broad-band spectrum extending from radio to X-rays whose luminosity cannot be explained by thermal emission from the system components alone, and is instead explained
Externí odkaz:
http://arxiv.org/abs/2208.08450
Autor:
Shahbaz, T., Gonzalez-Hernandez, J. I., Breton, R. P., Kennedy, M. R., Sanchez, D. Mata, Linares, M.
Using high-resolution optical spectroscopy we determine the chemical abundance of the secondary star in the binary millisecond pulsar PSR J1023+0038. We measure a metallicity of [Fe/H] = 0.48 +/- 0.04 which is higher than the Solar value and in gener
Externí odkaz:
http://arxiv.org/abs/2202.09070
Autor:
Dhillon, V. S., Bezawada, N., Black, M., Dixon, S. D., Gamble, T., Gao, X., Henry, D. M., Kerry, P., Littlefair, S. P., Lunney, D. W., Marsh, T. R., Miller, C., Parsons, S. G., Ashley, R. P., Breedt, E., Brown, A., Dyer, M. J., Green, M. J., Pelisoli, I., Sahman, D. I., Wild, J., Ives, D. J., Mehrgan, L., Stegmeier, J., Dubbeldam, C. M., Morris, T. J., Osborn, J., Wilson, R. W., Casares, J., Muñoz-Darias, T., Pallé, E., Rodríguez-Gil, P., Shahbaz, T., Torres, M. A. P., Postigo, A. de Ugarte, Cabrera-Lavers, A., Corradi, R. L. M., Domínguez, R. D., García-Alvarez, D.
HiPERCAM is a portable, quintuple-beam optical imager that saw first light on the 10.4-m Gran Telescopio Canarias (GTC) in 2018. The instrument uses re-imaging optics and 4 dichroic beamsplitters to record $u_s g_s r_s i_s z_s$ ($320-1060$ nm) images
Externí odkaz:
http://arxiv.org/abs/2107.10124
Autor:
Álvarez-Hernández, A., Torres, M. A. P., Rodríguez-Gil, P., Shahbaz, T., Anupama, G. C., Gazeas, K. D., Pavana, M., Raj, A., Hakala, P., Stone, G., Gomez, S., Jonker, P. G., Ren, J. -J., Cannizzaro, G., Pastor-Marazuela, I., Goff, W., Corral-Santana, J. M., Sabo, R.
We present a complete dynamical study of the intermediate polar and dwarf nova cataclysmic variable GK Per (Nova Persei 1901) based on a multi-site optical spectroscopy and $R$-band photometry campaign. The radial velocity curve of the evolved donor
Externí odkaz:
http://arxiv.org/abs/2107.06932
The Evolution of Rapid Optical/X-ray Timing Correlations in the Initial Hard State of MAXI J1820+070
Autor:
Paice, J. A., Gandhi, P., Shahbaz, T., Veledina, A., Malzac, J., Buckley, D. A. H., Charles, P. A., Rajwade, K., Dhillon, V. S., Littlefair, S. P., Marsh, T. R., Uttley, P., Vincentelli, F. M., Misra, R.
We report on a multi-epoch campaign of rapid optical/X-ray timing observations of the superbright 2018 outburst of MAXI J1820+070, a black hole low-mass X-ray binary system. The observations spanned 80 days in the initial hard-state, and were taken w
Externí odkaz:
http://arxiv.org/abs/2105.11769
Autor:
Baglio, M. C., Russell, D. M., Crespi, S., Covino, S., Johar, A., Homan, J., Bramich, D. M., Saikia, P., Campana, S., D'Avanzo, P., Fender, R. P., Goldoni, P., Goodwin, A. J., Lewis, F., Masetti, N., Zanon, A. Miraval, Motta, S. E., Muñoz-Darias, T., Shahbaz, T.
We report on an optical photometric and polarimetric campaign on the accreting millisecond X-ray pulsar (AMXP) SAX J1808.4-3658 during its 2019 outburst. The emergence of a low-frequency excess in the spectral energy distribution in the form of a red
Externí odkaz:
http://arxiv.org/abs/2010.15176