Search Results - "Hakala, P. J."

Exploitation and length limit evaluation of Alabama bass in a South‐eastern USA reservoir by Hakala, J. P, Sammons, S. M

“…Alabama bass, Micropterus henshalli Hubbs & Bailey, are the dominant sportfish of Allatoona Reservoir, Georgia, USA, but no population assessment has been…”
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Fast optical and X-ray variability in the UCXB 4U0614+09 by Hakala, P. J., Charles, P. A., Muhli, P.

“…We present results from several years of fast optical photometry of 4U0614+091 (V1055 Orionis), a candidate ultracompact X-ray binary most likely consisting of…”
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The origin of the tilted disc in the low-mass X-ray binary GR Mus (XB 1254−690) by Cornelisse, R., Kotze, M. M., Casares, J., Charles, P. A., Hakala, P. J.

“…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…”
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Combined analysis of Hubble and VLT photometry of the intermediate mass black hole ESO 243−49 HLX-1 by Farrell, S. A., Servillat, M., Gladstone, J. C., Webb, N. A., Soria, R., Maccarone, T. J., Wiersema, K., Hau, G. K. T., Pforr, J., Hakala, P. J., Knigge, C., Barret, D., Maraston, C., Kong, A. K. H.

“…In this paper, we present a combined analysis of data obtained with the Hubble Space Telescope (HST), Very Large Telescope (VLT) and Swift X-ray telescope of…”
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‘Stokes imaging’ of the accretion region in magnetic cataclysmic variables — I. Conception and realization by Potter, S. B., Hakala, P. J., Cropper, Mark

“…Modelling the polarized cyclotron emission from magnetic cataclysmic variables has been a pivotal technique for determining the structure of the accretion…”
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Evidence for evolving accretion disc structure in 4U1957+115 by Hakala, P. J., Muhli, P., Dubus, G.

“…We present results of the first multicolour photometric study of 4U1957+115, one of the optically less studied low-mass X-ray binaries (LMXBs). Our…”
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Indirect imaging of the accretion stream in eclipsing polars — II. HU Aquarii by Harrop-Allin, M. K., Cropper, M., Hakala, P. J., Hellier, C., Ramseyer, T.

“…We apply our technique for indirect imaging of the accretion stream to the polar HU Aquarii, using eclipse profiles observed when the system was in a high…”
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Stokes imaging of the accretion region in magnetic cataclysmic variables—II. V347 Pav by Potter, S. B., Cropper, Mark, Hakala, P. J.

“…In this paper we present an objective map of the cyclotron emission region in a magnetic cataclysmic variable from polarimetric observations of the AM Her…”
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Automated Source Classification Using a Kohonen Network by Mähönen, P. H, Hakala, P. J

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Drought effect on stream morphology and brook trout (Salvelinus fontinalis) populations in forested headwater streams by HAKALA, James P, HARTMAN, Kyle J

“…We assessed the effect of a severe drought in 1999 upon stream morphology and brook trout (Salvelinus fontinalis) populations in seven headwater streams in the…”
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The eclipsing X-ray pulsar X-7 in M33 by Dubus, G., Charles, P. A., Long, K. S., Hakala, P. J., Kuulkers, E.

“…Using our extensive ROSAT X-ray observations of M33, we confirm a 3.45-d eclipse period for the Einstein source X-7 proposed by Larson & Schulman and discover…”
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Indirect imaging of the accretion stream in eclipsing polars - I. Method and tests by Harrop-Allin, M. K., Hakala, P. J., Cropper, Mark

“…We present a method to deduce the brightness distribution of the accretion stream in eclipsing polars using photometric eclipse profiles and an indirect…”
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RE0751 + 14, the first ‘intermediate’ polar? by Rosen, S. R., Mittaz, J. P. D., Hakala, P. J.

“…We present optical spectroscopy, multicolour photometry and polarimetry of the new intermediate polar, RE0751 + 14, discovered during the ROSAT WFC survey. The…”
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X-ray detection of the dwarf nova V101 in M5 by Hakala, P. J., Charles, P. A., Johnston, H. M., Verbunt, F.

“…We have detected the cataclysmic variable V101 in M5 with the ROSAT HRI detector. The X-ray luminosity is at the high end of the distribution for known…”
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The D-CIXS X-ray spectrometer, and its capabilities for lunar science by Grande, M, Dunkin, S, Heather, D, Kellett, B, Perry, C.H, Browning, R, Waltham, N, Parker, D, Kent, B, Swinyard, B, Fereday, J, Howe, C, Huovelin, J, Muhli, P, Hakala, P.J, Vilhu, O, Thomas, N, Hughes, D, Alleyne, H, Grady, M, Russell, S, Lundin, R, Barabash, S, Baker, D, Clark, P.E, Murray, C.D, Christou, A, Guest, J, Casanova, I, d'Uston, L.C, Maurice, S, Foing, B, Kato, M

“…The purpose of the D-CIXS (Demonstration of a Compact Imaging X-ray Spectrometer) instrument on the ESA SMART-1 mission is to provide high quality…”
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The discovery of a new bright eclipsing AM Her system by Hakala, P. J., Watson, M. G., Vilhu, O., Hassall, B. J. M., Kellett, B. J., Mason, K. O., Piirola, V.

“…We report the optical identification of RE 2107 – 05, a new EUV source discovered in the ROSAT Wide Field Camera all-sky survey, and present the results of…”
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The D-CIXS X-ray mapping spectrometer on SMART-1 by Grande, M, Browning, R, Waltham, N, Parker, D, Dunkin, S.K, Kent, B, Kellett, B, Perry, C.H, Swinyard, B, Perry, A, Feraday, J, Howe, C, McBride, G, Phillips, K, Huovelin, J, Muhli, P, Hakala, P.J, Vilhu, O, Laukkanen, J, Thomas, N, Hughes, D, Alleyne, H, Grady, M, Lundin, R, Barabash, S, Baker, D, Clark, P.E, Murray, C.D, Guest, J, Casanova, I, d'Uston, L.C, Maurice, S, Foing, B, Heather, D.J, Fernandes, V, Muinonen, K, Russell, S.S, Christou, A, Owen, C, Charles, P, Koskinen, H, Kato, M, Sipila, K, Nenonen, S, Holmstrom, M, Bhandari, N, Elphic, R, Lawrence, D

“…The D-CIXS Compact X-ray Spectrometer will provide high quality spectroscopic mapping of the Moon, the primary science target of the ESA SMART-1 mission…”
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A New Magnetic Cataclysmic Variable: WGA J1047.1+6335 by Singh, K. P, Szkody, P, Barrett, P, White, N. E, Fierce, E, Silber, A, Hoard, D. W, Hakala, P. J, Piirola, V, Sohl, K

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Record circular polarization discovered in the shortest period magnetic cataclysmic variable, RE 1307 + 535 by Hakala, P. J., Piirola, V., Vilhu, O., Osborne, J. P., Hannikainen, D. C.

“…We report the discovery of very strong, variable ( + 50 to –20 per cent) circular polarization in the ROSAT EUV source RE 1307 + 535 in the red (R band)…”
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Scientific rationale for the D-CIXS X-ray spectrometer on board ESA's SMART-1 mission to the Moon by Dunkin, S.K, Grande, M, Casanova, I, Fernandes, V, Heather, D.J, Kellett, B, Muinonen, K, Russell, S.S, Browning, R, Waltham, N, Parker, D, Kent, B, Perry, C.H, Swinyard, B, Perry, A, Feraday, J, Howe, C, Phillips, K, McBride, G, Huovelin, J, Muhli, P, Hakala, P.J, Vilhu, O, Thomas, N, Hughes, D, Alleyne, H, Grady, M, Lundin, R, Barabash, S, Baker, D, Clark, P.E, Murray, C.D, Guest, J, d'Uston, L.C, Maurice, S, Foing, B, Christou, A, Owen, C, Charles, P, Laukkanen, J, Koskinen, H, Kato, M, Sipila, K, Nenonen, S, Holmstrom, M, Bhandari, N, Elphic, R, Lawrence, D

“…The D-CIXS X-ray spectrometer on ESA's SMART-1 mission will provide the first global coverage of the lunar surface in X-rays, providing absolute measurements…”
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