This is the homepage of Andrew Fruchter, an astronomer on the staff of the Space Telescope Science Institute . ... Here you can look at an HST images of the optical counterparts of gamma-ray bursts and their host galaxies. ... Therefore, substantial information on the fine scale structure of objects can be obtained by offsetting the pointing of the telescope between exposures and then combining these "dithered" exposures into a single image. ...

. IKI follow-up GRB team . Crimean Astrophysical Observatory . Special Astrophysical Observatory . Contact information | IKI main page .

... Flux density at 1 GHz (/Jy): 1040 . ... Notes: This is the remnant of the SN of AD 1054. ... Optical: Strongly polarised filaments, diffuse synchrotron emission, with `jet' faintly visible. ... VLA at 1.4 GHz, radio detection of `jet'. ... Velusamy 1985, MNRAS, 212, 359. ... Aller & Reynolds 1985, ApJ, 293, L73. ... Comparison of VLA observations at 74 MHz, 327 MHz, 1.5 GHz and 5 GHz for spectral index studies. ... VLA at 5 GHz (1".4) and HST multi-epoch observation for proper motion studies. ...

K-band Arcetri Obscured Supernova Search . What is the KAOSS Project? W hat is the KAOSS Project? Some recent surveys aimed at detecting Supernovae (SNe) in the optical have found that starburst galaxies do not show evidence for an enhanced SN rate, with respect to quiescent galaxies (Richmond et al. ... A similar result was obtained by Navasardyan et al. (2001) who looked for SNe in interacting galaxies, finding no evidence for correlations between SN rate and galaxy properties. ...

... About half an hour after the BAT trigger, the first images were obtained with the SAO RAS Zeiss-1000 telescope in four BVRI filters (see Fig.1). ... The spectrum of the optical transient was obtained with the SAO RAS 6-m BTA telescope 1.54 hours after the burst, using the SCORPIO instrument in the spectroscopic mode (Fig.2). ... The spectrum of the optical transient GRB090726 with identified lines, obtained with the BTA 1.54 hours after the burst. ...

... Time calculated from Fermi GBM Trigger Time = 14:12:08.67 ( Connaughton, GCN 9230 ). 1% coincident with our start zero image time. 3x3 degrees around Swift XRT position . ... SUBJECT: GRB 090424 : MASTER-Net prompt optical limit DATE: 09/04/25 20:29:42 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs E. Gorbovskoy, V. Lipunov, V.Kornilov, A.Belinski ... Our observations results: ---------------------------------------------------------------------- Fermi GRB Trigg.* ...

... At 22:42:27 UT 26/07/09, the Burst Alert Telescope (BAT) on board of the SWIFT multi-wavelength space observatory triggered and located GRB 090726 gamma-ray burst event. ... About half an hour after the BAT trigger, the first images were obtained with the SAO RAS Zeiss-1000 telescope in four BVRI filters (see Fig.1). ... The spectrum of the optical transient was obtained with the SAO RAS 6-m BTA telescope 1.54 hours after the burst, using the SCORPIO instrument in the spectroscopic mode (Fig.2). ...

... GCN 1488 . ... GCN 2001 , 2024 , 2046 , 2051 , 2054 , 2079 , 2094 , 2105 , 2108 , 2119 , 2198 , 2204 , 2220 , 2260 , 2299 , AstL (2003) , ApJ (2004) . ... GCN 2821 , 2826 , ApJ (2010) . ... GCN 3139 , ApJ (2010) . ... GCN 3493 , ApJ (2010) . ... GCN 3718 , ApJ (2010) . ... GCN 3853 , 3864 , 3896 , ApJ (2010) . ... GCN 5173 , 5177 , 5183 , 5186 , 5189 , 5193 , AstL (2007a) , AstL (2007b) , A (2010) . ... GCN 5524 , ApJ (2010) . ... GCN 9037 , ApJ (2010) . ... Russian-Turkish 1.5-m Telescope (RTT150) ...

Historic Optical Flash Fades . ... WHT, INT Explanation: The largest telescopes in the world have scrambled to point toward this faint, fading object. ... Because it may well be the first active optical counterpart ever found for a gamma-ray burst , and could hold the clue to the distance scale to this most enigmatic class of astronomical objects . ... Is there a faint galaxy superposed behind the OT or is this extended emission fading too? ... NASA Web Site Statements, Warnings, and Disclaimers . ...

... Optical photometric data were taken of fields encompassing all these sources during a total of seven telescope runs. ... The initial goal of the photometric observations is to follow up the X--ray sources, assign them colors in a standard system, so that the observed objects can be placed on a color--magnitude diagram. This can be used to verify that the X--ray sources are indeed PMS stars. ... Aperture photometry was performed using the APPHOT package in IRAF. ...

GRB 151027B, Swift's 1,000th burst (center), is shown in this composite X-ray, ultraviolet and optical image. X-rays were captured by Swift's X-Ray Telescope, which began observing the field 3.4 minutes after the Burst Alert Telescope detected the blast. Swift's Ultraviolet/Optical Telescope (UVOT) began observations seven seconds later and faintly detected the burst in visible light. ... The image has a cumulative exposure of 10.4 hours. ...

Next: Results and discussion Up: Observations and data reduction Previous: Reduction of photometric data . ... Since HS 0822+3542 had a known optical redshift, we split the 1024-channel autocorrelator in two halves and used a dual-polarization receiver to increase the S/N ratio. ... 0.077 0.005 . ... 0.004 0.003 . ... 0.005 0.004 . ... 0.005 0.04 . ... 0.49 0.03 . ... Next: Results and discussion Up: Observations and data reduction Previous: Reduction of photometric data Labaratory "Structure" . ...

. Departement of Quantum Astrophysics . Head: Kurt V.G. , Prof. ultraviolet spectroscopy of planetary upper atmospheres and interplanetary/interstellar medium; . observations of gamma-bursts and optical identification of their sources; . long-base optical interferometry. Staff: .

RADIO AND OPTICAL OBSERVATIONS OF THE PSR B1259-63/SS 2883 Be STAR BINARY SYSTEM . Simon Johnston (ATNF, CSIRO, and RCfTA, University of Sydney, Australia), . ... Abstract We report here on radio timing observations of the 47-ms pulsar PSR B1259-63 (PSR J1302-6350) and optical observations of its binary companion Be star, SS 2883. ... The system is a likely progenitor of the high-mass X-ray binaries and double-neutron-star systems such as PSR B1913+16. simonj@physics.usyd.edu.au ...

... Click on an object in the solar system or choose from the list at left to learn more . The Arecibo Observatory planetary radar is the world's most powerful instrument for post-discovery characterization and orbital refinement of near-Earth objects. ... The Solar System Studies group is a department of the Arecibo Observatory, which is an NSF facility operated under cooperative agreement by SRI International, Universities Space Research Association (USRA), and la Universidad Metropolitana (UMET). ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. April 22, 1997 . Historic Optical Flash Fades . ... Explanation : The largest telescopes in the world have scrambled to point toward this faint, fading object. ... The OT arrows show the source that faded from view during this time. ... Is there a faint galaxy superposed behind the OT or is this extended emission fading too? ... About APOD > . ...

To main of Laboratory . The research work and design of optical and optical-electronic devices are carries out by laboratory staff: . ... Lens: . ... In the layout 1 prism systems perform functions of dispersive element, corrector of aberrations, optical reducer. ... Spectral range 200 - 400 nm; . ... Back Forward . ... The main corrector's function are compensation of field aberrations of the main spherical mirror of a telescope (diameter of 600 mm, f'=1200 mm) and increase aperture ratio. ...

Static Fourier spectrometers are often used for spectral measurements of the ionosphere emissions. There are two main advantages of Fourier spectrometers (FS) - large geometric factor and high spectral resolution; these parameters are two orders better than for grating spectral instruments. ... In scanning Fourier spectrometer optical and electric modulation of signal is used to avoid this problem, for static Fourier spectrometer there are no such ways. ...

... Optical calibrations for AZT-8 and LX-200 . ... preliminary . ... 0235+164 . AO 0235+16 . ... 0420 014 . PKS 0420 01 . ... 0528+134 . PKS 0528+134 . ... 0647+250 . 1ES 0647 . ... 0716+714 . S5 0716+71 . ... PKS 0735+17 . ... PKS 1222 . ... PKS 1510 08 . ...

... at 11 00 on Thursday, July 26 , 2007 . 121-th seminar) . ... N.Kawai (Tokyo Tech, Japan) . Subaru Observation of the optical afterglow of the most distant gamma-ray burst" . 40 min . ... T.Kotani (Tokyo Tech, Japan) . Multi-Wavelength Observation Campaigns for Microquasars" . ... The secretary of the seminar - M.E.Prokhorov . Access free (code 4687) . ...