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  1. No Access

    Article

    In-orbit performance of UVIT over the past 5 years

    Over the last 5 years, UVIT has completed observations of more than 500 proposals with \(\sim 800\) ...

    S. K. Ghosh, P. Joseph, A. Kumar, J. Postma… in Journal of Astrophysics and Astronomy (2021)

  2. No Access

    Article

    In-orbit Performance of UVIT and First Results

    The performance of the ultraviolet telescope (UVIT) on-board AstroSat is reported. The performance in orbit is also compared with estimates made from the calibrations done on the ground. The sensitivity is fou...

    S. N. Tandon, J. B. Hutchings, S. K. Ghosh… in Journal of Astrophysics and Astronomy (2017)

  3. No Access

    Article

    The UVIT telescopes on the Astrosat observatory

    The UVIT telescopes are a payload package on the ISRO Astrosat observatory. They are co-aligned with three X-ray telescopes, and will operate simultaneously with them. The overall observatory is summarized, an...

    J. B. Hutchings in Astrophysics and Space Science (2014)

  4. No Access

    Chapter and Conference Paper

    Altair Observations of 3C273

    H and J band observations of 3C273 from the commissioning run of Altair are presented. The data are compared with HST data, and some new morphological results on the host galaxy are discussed.

    J.B. Hutchings, J. Stoesz, J.-P. Véran, F. Rigaut in Science with Adaptive Optics (2005)

  5. No Access

    Chapter and Conference Paper

    A Search for the First Massive Galaxy Clusters

    We have obtained deep, multi-band imaging observations around three of the most distant known quasars at redshifts z>6. Standard accretion theory predicts that the supermassive black holes present in these quasar...

    C.J. Willott, D. Crampton, J.B. Hutchings… in Growing Black Holes: Accretion in a Cosmol… (2005)

  6. No Access

    Chapter

    Kinematics and Morphology of the Resolved Narrow Line Region in NGC 4151

    A complement of HST narrow band images, STIS slitless and long-slit spectra have been employed to probe the morphology, kinematics, dynamics, and ionization structure of the near-nuclear region in NGC 4151. The i...

    M. E. Kaiser, L. D. Bradley II… in Toward a New Millennium in Galaxy Morpholo… (2000)

  7. No Access

    Article

    Kinematics and Morphology of the Resolved Narrow Line Region in NGC 4151

    A complement of HST narrow band images, STIS slitless and long-slit spectra have been employed to probe the morphology, kinematics, dynamics, and ionization structure of the near-nuclear region in NGC 4151. The i...

    M.E. Kaiser, L.D. Bradley II, J.B. Hutchings… in Astrophysics and Space Science (1999)

  8. No Access

    Chapter and Conference Paper

    Cfht Adaptive Optics Imaging Of Active Galaxies

    The CFHT adaptive optics camera uses a visible light guide signal from a star to operate a bimorph mirror. The system is a unit that is operated by the observer and can be used with CCD or HgCdTe detectors. Pi...

    J. B. Hutchings in Galaxy Interactions at Low and High Redshift (1999)

  9. No Access

    Chapter

    The CNOC Cluster Survey

    Rich galaxy clusters are powerful probes of both cosmological and galaxy evolution parameters. The CNOC cluster survey was primarily designed to distinguish between Ω = 1 and Ω ≃ 0.2 cosmologies. Projected for...

    R. G. Carlberg, H. K. C. Yee, H. Lin, C. W. Shepherd, P. Gravel… in The Evolving Universe (1998)

  10. No Access

    Chapter and Conference Paper

    The CNOC Cluster Survey

    The CNOC cluster survey was designed to measure the cluster mass to light ratio and the luminosity density of the Universe in the same range of redshifts for the purpose of estimating the parameter Ω. We find tha...

    R. G. Carlberg, H. K. C. Yee, E. Ellingson, S. Morris… in The Early Universe with the VLT (1997)

  11. No Access

    Chapter and Conference Paper

    Resolution of High Redshift QSO Hosts

    At z>2 a surprising number of QSOs have been resolved in visible light. These results imply that these hosts have extremely high luminosity and blue populations. Improved and quantitative data require a combin...

    J. B. Hutchings in Quasar Hosts (1997)

  12. No Access

    Chapter and Conference Paper

    JHK Imaging of QSO Hosts and Companions

    Deep J,H,K imaging is presented of 90 arcmin fields around QSOs at red-shifts in the range 0.06 to 2.4, including images, luminosity profiles, and NIR 2-colour diagrams. The low z hosts are all resolved, and N...

    J. B. Hutchings in Quasar Hosts (1997)

  13. No Access

    Chapter and Conference Paper

    Quasar Radio Structure in Cluster Environments

    We have VLA snapshots at 6cm and 20cm of ~50 QSOs of redshift ≤0.7 with a range of known optical galaxy environments. The radio sources were characterised by measures of flux, size, and shape. The cluster dens...

    J. B. Hutchings, A. C. Gower, S. Ryneveld, A. Dewey in Extragalactic Radio Sources (1996)

  14. No Access

    Chapter and Conference Paper

    Non-LTE model atmosphere analysis of the supersoft X-ray source RX J0122.9-7521

    The supersoft X-ray source RX J0122.9-7521 was discovered in the ROSAT all-sky survey and suspected to be a member of the Small Magellanic Cloud (Kahabka et al. 1994). More recently the source has been optical...

    K. Werner, B. Wolff, M. W. Pakull, A. P. Cowley, P. C. Schmidtke… in Supersoft X-Ray Sources (1996)

  15. No Access

    Chapter and Conference Paper

    Populations in the Z=0.23 Rich Cluster Abell 2390

    We have spectra, colours and morphologies from the CFHT for 240 cluster members and 80 field galaxies over a 7 × 46 arcmin field. The cluster galaxies show strong radial gradients in colour, morphology, and sp...

    J. B. Hutchings, R. Abraham, T. Smecker-Hane, S. Morris, T. Davidge… in Stellar Populations (1995)

  16. No Access

    Chapter

    Hubble Space Telescope Spectroscopy of Massive Hot Stars in the Magellanic Clouds and M31

    Using the Hubble Space Telescope (HST) and the Faint Object Spectrograph (FOS) high signal to noise spectrograms were obtained for 15 OB stars in the Magellanic Clouds***, three of which are of spectral type O...

    S. M. Haser, D. J. Lennon, R.-P. Kudritzki, J. Puls… in Evolution of Massive Stars (1994)

  17. No Access

    Chapter

    Astronomy from Space

    The period covered by this report has seen very significant progress in the different fields of space. astronomy. In the infrared and submillimeter region the cosmic Background Explorer has continued to domina...

    Joachim E. Trümper, Giovanni G. Fazio, J. B. Hutchings… in Reports on Astronomy (1994)

  18. No Access

    Article

    Hubble Space Telescope spectroscopy of massive hot stars in the Magellanic Clouds and M31

    Using the Hubble Space Telescope (HST) and the Faint Object Spectrograph (FOS) high signal to noise spectrograms were obtained for 15 OB stars in the Magellanic Clouds***, three of which are of spectral type O3. ...

    S. M. Haser, D. J. Lennon, R. -P. Kudritzki, J. Puls… in Space Science Reviews (1993)

  19. No Access

    Article

    An imaging optical/UV monitor for X-ray astronomy observatories

    The understanding of high-energy astrophysical sources often depends on observations over the entire electromagnetic spectrum. Yet, extensive multifrequency observing campaigns can consume the resources of a l...

    F. A. Córdova, K. O. Mason, W. C. Priedhorsky, B. Margon… in Astrophysics and Space Science (1985)

  20. No Access

    Article

    Are QSOs activated by interactions between galaxies?

    In a sample of 45 quasistellar objects (QSOs) with redshift 0.62 or less, a large fraction (>30%) appear to be currently interacting with another galaxy. All but three of the QSOs reside within nebulosity inte...

    J. B. Hutchings, B. Campbell in Nature (1983)

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