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5 results on '"Stecklum B"'

1. The Polarization Evolution of the Optical Afterglow of GRB 030329.

Author

Greiner, J., Klose, S., Reinsch, K., Schmid, H. M., Sari, R., Hartmann, D. H., Kouveliotou, C., Rau, A., Palazzi, E., Straubmeier, C., Stecklum, B., Zharikov, S., Tovmassian, G., Bärnbantner, O., Ries, C., Jehin, E., Henden, A., Kaas, A. A., Grav, T., and Hjorth, J.

Subjects
AFTERGLOW (Physics), OPTICAL polarization, GAMMA ray bursts, MAGNETIC fields, ASTROPHYSICS, ASTRONOMY
Abstract

We report 31 polarimetric observations of the afterglow of GRB 030329 with high signal-to-noise and high sampling frequency. The data imply that the afterglow magnetic field has small coherence length and is mostly random, probably generated by turbulence. © 2004 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2004
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2. GRB 030329 with SARA and TLS.

Author

Lindsay, K., Zeh, A., Hartmann, D. H., Klose, S., Shaw, S., Leake, M., Webb, J., Stecklum, B., Williams, M., and Howard, E.

Subjects
GAMMA ray bursts, NUCLEAR reactions, PHOTOMETRY, SUPERNOVAE, ASTRONOMY, ASTROPHYSICS
Abstract

We present B band observations performed with the SARA 0.9m telescope at KPNO and the Tautenburg 1.34m Schmidt telescope in Tautenburg, Germany, for the optical afterglow of the gamma-ray burst GRB 030329. Observations were carried out from March 30.12 to April 8.29 (UT) with SARA, and from March 30.80 to April 7.00 (UT) with the Tautenburg Schmidt. This burst provides the best covered GRB afterglow light curve to date. The afterglow exhibits a complicated “fine structure” with several episodes of significant re-brightening. These episodes inevitably demand a more detailed numerical fit which introduces a larger number of free parameters. It is difficult to separate the light from the re-brightening phases and the light from the underlying supernova. The photometric data show an average temporal regression in the flux of the optical afterglow, that is typical for GRB afterglow. However, “bumps and wiggles” clearly suggest a degree of complexity resulting from the re-brightening phases that is not easily fitted with standard models. At late time the light curve receives a significant contribution from an underlying supernova component (SN 2002dh). We argue that in cases such as GRB 030329 single site observations are inadequate to properly sample the evolving flux. Consequently, simple broken power law fits of data obtained with just one telescope may lead to rather poor descriptions of the afterglow charcateristics. © 2004 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2004
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3. GRB 051008: a long, spectrally hard dust-obscured GRB in a Lyman-break galaxy at z ≈ 2.8★.

Author

Volnova, A. A., Pozanenko, A. S., Gorosabel, J., Perley, D. A., Frederiks, D. D., Kann, D. A., Rumyantsev, V. V., Biryukov, V. V., Burkhonov, O., Castro-Tirado, A. J., Ferrero, P., Golenetskii, S. V., Klose, S., Loznikov, V. M., Minaev, P. Yu., Stecklum, B., Svinkin, D. S., Tsvetkova, A. E., de Ugarte Postigo, A., and Ulanov, M. V.

Subjects
ASTRONOMICAL observations, DARK matter, GAMMA ray bursts, DUST, GALAXY spectra, ASTRONOMICAL photometry, GALACTIC redshift
Abstract

We present observations of the dark gamma-ray burst GRB 051008 provided by Swift/BAT, Swift/XRT, Konus-WIND, INTEGRAL/SPI-ACS in the high-energy domain and the Shajn, Swift/UVOT, Tautenburg, NOT, Gemini and Keck I telescopes in the optical and near-infrared bands. The burst was detected only in gamma- and X-rays and neither a prompt optical nor a radio afterglow was detected down to deep limits. We identified the host galaxy of the burst, which is a typical Lyman-break galaxy (LBG) with R-magnitude of 24.06 ± 0.10 mag. A redshift of the galaxy of $z = 2.77_{-0.20}^{+0.15}$ is measured photometrically due to the presence of a clear, strong Lyman-break feature. The host galaxy is a small starburst galaxy with moderate intrinsic extinction (AV = 0.3) and has a star formation rate of ∼60 M⊙ yr−1 typical for LBGs. It is one of the few cases where a GRB host has been found to be a classical LBG. Using the redshift we estimate the isotropic-equivalent radiated energy of the burst to be Eiso = (1.15 ± 0.20) × 1054 erg. We also provide evidence in favour of the hypothesis that the darkness of GRB 051008 is due to local absorption resulting from a dense circumburst medium. [ABSTRACT FROM AUTHOR]

Published
2014
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4. Near-infrared polarimetric observations of the afterglow of GRB 000301C.

Author

Stecklum, B., Fischer, O., Klose, S., Mundt, R., and Bailer-Jones, C.

Subjects
*GAMMA ray bursts, *POLARIZATION (Nuclear physics), *AFTERGLOW (Physics)
Abstract

Based on near-infrared polarimetric observations we constrain the degree of the linear polarization of the afterglow light of GRB 000301C to less than 30% 1.8 days after the burst. [ABSTRACT FROM AUTHOR]

Published
2001

5. Polarimetric studies of gamma-ray burst afterglows.

Author

Klose, S., Stecklum, B., and Fischer, O.

Subjects
*GAMMA ray bursts, *AFTERGLOW (Physics)
Abstract

We report on a target of opportunity program to study GRB afterglows based on observations with the Calar Alto 3.5-m telescope equipped with the near-infrared camera Omega Cass. © 2000 American Institute of Physics. [ABSTRACT FROM AUTHOR]

Published
2000

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