Search Results - "LEHTO, J. H"

A massive binary black-hole system in OJ 287 and a test of general relativity by Valtonen, M. J, Lehto, H. J, Nilsson, K, Heidt, J, Takalo, L. O, Sillanpää, A, Villforth, C, Kidger, M, Poyner, G, Pursimo, T, Zola, S, Wu, J.-H, Zhou, X, Sadakane, K, Drozdz, M, Koziel, D, Marchev, D, Ogloza, W, Porowski, C, Siwak, M, Stachowski, G, Winiarski, M, Hentunen, V.-P, Nissinen, M, Liakos, A, Dogru, S

“…Tests of Einstein's general theory of relativity have mostly been carried out in weak gravitational fields where the space-time curvature effects are…”
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On the masses of OJ287 black holes by Valtonen, M. J., Ciprini, S., Lehto, H. J.

“…Abstract Two multifrequency campaigns were carried out on OJ287 in 2005: in April when it was in its pre-outburst state, and in November during the main 12 yr…”
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Predicting the Next Outbursts of OJ 287 in 2006-2010 by Valtonen, M. J, Lehto, H. J, Sillanpää, A, Nilsson, K, Mikkola, S, Hudec, R, Basta, M, Teräsranta, H, Haque, S, Rampadarath, H

“…In its nearly regular cycle of outbursts the quasar OJ 287 is due for another outburst season in 2006-2010. The prediction for the exact timing depends on the…”
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2 Years of INTEGRAL Monitoring of GRS 1915+105. II. X-Ray Spectro-Temporal Analysis by Rodriguez, J, Shaw, S. E, Hannikainen, D. C, Belloni, T, Corbel, S, Cadolle Bel, M, Chenevez, J, Prat, L, Kretschmar, P, Lehto, H. J, Mirabel, I. F, Paizis, A, Pooley, G, Tagger, M, Varnière, P, Cabanac, C, Vilhu, O

“…This is the second paper presenting the results of 2 yr of monitoring of GRS 1915+105 with INTEGRAL, RXTE, and the Ryle Telescope. We present the X-ray…”
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2 Years of INTEGRAL Monitoring of GRS 1915+105. I. Multiwavelength Coverage with INTEGRAL, RXTE, and the Ryle Radio Telescope by Rodriguez, J, Hannikainen, D. C, Shaw, S. E, Pooley, G, Corbel, S, Tagger, M, Mirabel, I. F, Belloni, T, Cabanac, C, Cadolle Bel, M, Chenevez, J, Kretschmar, P, Lehto, H. J, Paizis, A, Varnière, P, Vilhu, O

“…We report the results of simultaneous monitoring observations of the Galactic microquasar GRS 1915+105 with INTEGRAL and RXTE from 3 up to [image]300 keV, and…”
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Tidally Induced Outbursts in OJ 287 during 2005-2008 by Valtonen, M. J, Nilsson, K, Villforth, C, Lehto, H. J, Takalo, L. O, Lindfors, E, Sillanpää, A, Hentunen, V.-P, Mikkola, S, Zola, S, Drozdz, M, Koziel, D, Ogloza, W, Kurpinska-Winiarska, M, Siwak, M, Winiarski, M, Heidt, J, Kidger, M, Pursimo, T, Wu, J.-H, Zhou, X, Sadakane, K, Marchev, D, Nissinen, M, Niarchos, P, Liakos, A, Gazeas, K, Dogru, S, Poyner, G, Dietrich, M, Assef, R, Atlee, D, Bird, J, DePoy, D, Eastman, J, Peeples, M, Prieto, J, Watson, L, Yee, J, Mattingly, A, Ohlert, J

“…The blazar OJ 287 has produced two major optical outburst events during the years 2005-2008. These are the latest in a series of outbursts that have occurred…”
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The 2005 November Outburst in OJ 287 and the Binary Black Hole Model by Valtonen, M. J, Nilsson, K, Sillanpää, A, Takalo, L. O, Lehto, H. J, Keel, W. C, Haque, S, Cornwall, D, Mattingly, A

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Measuring the Spin of the Primary Black Hole in OJ287 by Valtonen, M. J, Mikkola, S, Merritt, D, Gopakumar, A, Lehto, H. J, Hyvönen, T, Rampadarath, H, Saunders, R, Basta, M, Hudec, R

“…The compact binary system in OJ287 is modeled to contain a spinning primary black hole with an accretion disk and a non-spinning secondary black hole. Using…”
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Analysis of COSIMA spectra: Bayesian approach by Lehto, H. J, Zaprudin, B, Lehto, K. M, Lönnberg, T, Silén, J, Rynö, J, Krüger, H, Hilchenbach, M, Kissel, J

“…We describe the use of Bayesian analysis methods applied to time-of-flight secondary ion mass spectrometer (TOF-SIMS) spectra. The method is applied to the…”
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A Numerical Simulation of the Brightness Variations of OJ 287 by Sundelius, B, Wahde, M, Lehto, H. J, Valtonen, M. J

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Testing the 1995 Binary Black Hole Model of OJ287 by Valtonen, M. J, Lehto, H. J, Takalo, L. O, Sillanpää, A

“…In 1995, a binary black hole model was proposed for the quasar OJ287, where the smaller secondary black hole impacts the accretion disk of the primary black…”
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On the nature of rapid X-ray variability in active galactic nuclei by Green, A. R., McHardy, I. M., Lehto, H. J.

“…We systematically analyze all (110) EXOSAT AGN medium-energy light curves of length greater than 20 ks to search for and quantify their flux variability. We…”
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Measuring black hole spin in OJ287 by Valtonen, M. J., Mikkola, S., Lehto, H. J., Hyvönen, T., Nilsson, K., Merritt, D., Gopakumar, A., Rampadarath, H., Hudec, R., Basta, M., Saunders, R.

“…We model the binary black hole system OJ287 as a spinning primary and a non-spinning secondary. It is assumed that the primary has an accretion disk which is…”
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Testing the Black Hole No-hair Theorem with OJ287 by Valtonen, M. J, Mikkola, S, Lehto, H. J, Gopakumar, A, Hudec, R, Polednikova, J

“…We examine the ability to test the black hole no-hair theorem at the 10% level in this decade using the binary black hole in OJ287. In the test we constrain…”
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Mapping the three-body system – decay time and reversibility by Lehto, H. J., Kotiranta, S., Valtonen, M. J., Heinämäki, P., Mikkola, S., Chernin, A. D.

“…In this paper we carry out a quantitative analysis of the three-body systems and map them as a function of decaying time and initial configuration, look at…”
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The role of secular resonances on trojans of the terrestrial planets by Brasser, R., Lehto, H. J.

“…Abstract We investigate the role of secular resonances on the motion of terrestrial-planet trojans in tadpole motion for 5 Myr in the inclination range i 90°…”
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A possible fossil galaxy group by Ponman, T. J, Allan, D. J, Jones, L. R, Merrifield, M, McHardy, I. M, Lehto, H. J, Luppino, G. A

“…The discovery of a possible candidate for a fossil group, a single elliptical galaxy formed by the merging of compact galaxy groups, is reported. The candidate…”
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A controlled, prospective, 1-year trial of Citalopram in the treatment of panic disorder by LEPOLA, U. M, WADE, A. G, LEINONEN, E. V, KOPONEN, H. J, FRAZER, J, SJÖDIN, I, PENTTINEN, J. T, PEDERSEN, T, LEHTO, H. J

“…The objective of this study was to evaluate the efficacy and tolerability of citalopram in the long-term treatment of adult outpatients with panic disorder…”
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Discovery of Polarized Emission from Two Soft X-ray-emitting Intermediate Polars: UU Col and NY Lup by Katajainen, S, Butters, O, Norton, A. J, Lehto, H. J, Piirola, V, Berdyugin, A

“…We aim to investigate the magnetic field strengths and cyclotron emission of the two soft X-ray-emitting intermediate polars (IPs) UU Col and NY Lup. We study…”
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UBVRI photopolarimetry of the long-period eclipsing AM Herculis binary V1309 Ori by Katajainen, S., Piirola, V., Ramsay, G., Scaltriti, F., Lehto, H. J., Cropper, M., Harrop-Allin, M. K., Anderlucci, E., Hakala, P.

“…We report simultaneous UBVRI photopolarimetric observations of the long-period (7.98 h) AM Her binary V1309 Ori. The length and shape of the eclipse ingress…”
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