6,978 research outputs found
IfA Satellite Camera example observations from night of 4th May 2025
No full textDataset consists of 6 images taken by the satellite camera at the Institute for Astronomy, University of Edinburgh. There are three images each of two known satellites, HAIYANG 2C (46469) and SWOT (54754). Each image includes a full frame NEF version, a smaller PNG image containing just the satellite trail, and a FITS file that contains the astrometric calibration appropriate for the PNG image.Files associated with HAIYANG 2C (46469):
005_2025-05-04_221914_A_DSC_0359.NEF
005_2025-05-04_221914_A_DSC_0359_streak_1.png
005_2025-05-04_221914_A_DSC_0359_wcs_1.fits
005_2025-05-04_221929_A_DSC_0360.NEF
005_2025-05-04_221929_A_DSC_0360_streak_1.png
005_2025-05-04_221929_A_DSC_0360_wcs_1.fits
005_2025-05-04_221944_A_DSC_0361.NEF
005_2025-05-04_221944_A_DSC_0361_streak_1.png
005_2025-05-04_221944_A_DSC_0361_wcs_1.fits
Files associated with SWOT (54754):
005_2025-05-05_013644_A_DSC_1144.NEF
005_2025-05-05_013644_A_DSC_1144_streak_1.png
005_2025-05-05_013644_A_DSC_1144_wcs_1.fits
005_2025-05-05_013659_A_DSC_1145.NEF
005_2025-05-05_013659_A_DSC_1145_streak_2.png
005_2025-05-05_013659_A_DSC_1145_wcs_2.fits
005_2025-05-05_013714_A_DSC_1146.NEF
005_2025-05-05_013714_A_DSC_1146_streak_2.png
005_2025-05-05_013714_A_DSC_1146_wcs_2.fit
TRACY ROWELL Double Bass SENIOR RECITAL Monday, January 28, 1991 7:00 p.m. in the Shepherd School Recital Hall
No full textProgram: Sonata in G major, BWV 1027, Johann Sebastian Bach (1685-1750) -- The old king's lament, Nicholas Maw -- Sonata for double bass and piano, Paul Hindemith (1895-1963) -- Grand duo in A for clarinet, contrabass, and piano, Giovanni Bottesini (1821-1889).This recital is given in partial fulfillment of the requirements for the degree Bachelor of Music
Interview with Nicholas Christopher, author of Somewhere in the Night: Film Noir and the American City
No full textInterview with Nicholas Christopher, author of Somewhere in the Night: Film Noir and the American Cit
Company-Director graphs for UK publicly traded companies between January and July 2020
No full textThis dataset accompanies the paper "THE DIRECTOR DAISY CHAIN: EMPIRICAL EVIDENCE OF THE INTERCONNECTIVITY OF UK DIRECTORS OF PUBLICLY TRADED COMPANIES". It contains graphs representing the interconnections of UK publicly traded companies and their directors via directorships of executive and non-executive types. There are two graphs consisting of 1) all companies, and 2) companies that are not members of the Association of Investment Companies.This dataset consists of two plain text files AllCompanies.txt and NonAicCompanies.txt. Each contains a representation of the company-director-directorship graph for all companies and the subset of companies that are not AIC members, respectively. The graph structure is represented in plain text format, with the details of the companies, directors and directorships explained in the header section of each file
Resurrecting the Author
No full textPresentation of Nicholas Wolterstorff\u27s Paper Resurrecting the Author with time after for questions beginning at 18:00
Search for a dark matter annihilation signal from the galactic center halo with H.E.S.S.
No full textA search for a very-high-energy (VHE;≥ 100 GeV) γ-ray signal from self-annihilating particle dark matter (DM) is performed towards a region of projected distance r∼45–150 pc from the Galactic center. The background-subtracted -ray spectrum measured with the High Energy Stereoscopic System (H.E.S.S.) γ-ray instrument in the energy range between 300 GeVand 30 TeV shows no hint of a residual γ-ray flux. Assuming conventional Navarro-Frenk-White and Einasto density profiles, limits are derived on the velocity-weighted annihilation cross section (σv)as a function of the DM particle mass. These are among the best reported so far for this energy range and in particular differ only little between the chosen density profile parametrizations. In particular, for the DM particle mass of 1 TeV, values for h (σv) above 3x10⁻²⁵ cm³ s⁻1 are excluded for the Einasto density profile.A. Abramowski... N. Maxted... B. Nicholas... G. Rowell... et al. (H.E.S.S. Collaboration
H.E.S.S observations of the microquasars Cir X-1, Cyg X-1 and 4U 1755-33
No full textA number of microquasars exhibit parsec-scale jets, which in some cases are known to interact with the interstellar medium (ISM). A famous example is the SS-433 system. Here, we summarise H.E.S.S. observations of three further examples in this category with arc-minute scale jets and/or jet/ISM interaction features. The small line-of-sight angle in the Cir X-l jet makes this source a potential 'microblazar'. An arc-minute bow-shock radio feature has been blown out by the Cyg X-1 jet, and the MAGIC telescope has also detected a VHE flare on 24 Sept. 2006 from Cyg X-1 (H.E.S.S. obs. were taken ∼1 month earlier). Persistent bi-lobal (∼7 arcmin long) 'fossil' jets of 4U1755-33 have been seen in X-rays. This report summarises our observations, searching for pointlike VHE emission at the central sources and for extended emission from their jets and/or jet/ISM interaction regions. © 2009 American Institute of Physics.B. Nicholas and G. Rowell (on behalf of the H.E.S.S Collaboration
PKS2005-489 at VHE: four years of monitoring with HESS and simultaneous multi-wavelength observations
No full textVHE observations of PKS 2005-489 were made with HESS from 2004 through 2007, together with three simultaneous multi-wavelength campaigns performed with XMM-Newton and RXTE in 2004 and 2005. A strong VHE signal, ~17sigma total, is detected during the four years of HESS observations (90.3 hrs live time). The integral flux above the average analysis threshold of 400 GeV is ~3% of the Crab and varies weakly on time-scales from days to years. At X-ray energies the flux is observed to vary by more than an order of magnitude between 2004 and 2005. Strong changes in the X-ray spectrum (DeltaGamma~0.7) are also observed, which appear to be mirrored in the VHE band. The SED of PKS 2005-489, constructed for the first time with contemporaneous data on both humps, shows significant evolution. The large flux variations in the X-ray band, coupled with weak or no variations in the VHE band and a similar spectral behavior, suggest the emergence of a new, separate, harder emission component in September 2005.F. Acero, B. Nicholas, G. Rowell,...and et al, and H.E.S.S. Collaboration
Discovery of VHE gamma-rays from the BL Lacertae object PKS 0548-322
No full textAims. PKS 0548-322 (z = 0.069) is a "high-frequency-peaked" BL Lac object and a candidate very high energy (VHE, E > 100 GeV) γ-ray emitter, due to its high X-ray and radio flux. Observations at the VHE band provide insights into the origin of very energetic particles present in this source and the radiation processes at work. Methods. We report observations made between October 2004 and January 2008 with the HESS array, a four imaging atmospheric-Cherenkov telescopes. Contemporaneous UV and X-ray observations with the Swift satellite in November 2006 are also reported. Results. PKS 0548-322 is detected for the first time in the VHE band with HESS We measure an excess of 216 γ-rays corresponding to a significance of 5.6 standard deviations. The photon spectrum of the source is described by a power-law, with a photon index of Γ = 2.86 ± 0.34stat ± 0.10 sys. The integral flux above 200 GeV is ∼1.3% of the flux of the Crab Nebula, and is consistent with being constant in time. Contemporaneous Swift/XRT observations reveal an X-ray flux between 2 and 10 keV of F 2-10 keV = (2.3±0.2)×10-11 erg cm -2 s-1, an intermediate intensity state with respect to previous observations. The spectral energy distribution can be reproduced using a simple one-zone synchrotron self Compton model, with parameters similar those observed for other sources of this type. © 2010 ESO.F. Aharonian... B. Nicholas... G. Rowell... et al
Heritability and Linkage Analysis of Appendicitis Utilizing Age at Onset
No full textAppendicitis usually afflicts the young, but there is a large tail in the distribution of onset age. The genetics of this disease are still not well understood. A heritability analysis and genome wide linkage analysis of a large twin dataset was undertaken. Treating age of onset of appendicitis as a censored survival trait revealed a heritability of 0.21, and found evidence of linkage to Chromosome 1p37.3. Author(s): Christopher Oldmeadow 1 * | Kerrie Mengersen 2 | Nicholas Martin 3 | David L. Duffy
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