... RATAN-600 data for the BL Lacertae objects (multi-frequency catalogue, Version 1.0) . GPS radio sources . ... Kovalev et al. (2009) also investigated the correlation between radio emission and gamma-ray flux (using Fermi-LAT data after the first 3 months of observations) for 135 AGNs. ... Moreover, the correlation between high-frequency radio emission (at 37 GHz) and gamma-ray emission (100 MeV.100 GeV, Fermi-LAT data) for 249 northern AGNs was studied by Nieppola et al. ... GHz) . ...

We present photometric observations of six radio-loud quasars that were detected by the COMPTEL gamma-ray telescope. ... Two sources are as blue as optically-selected quasars, and are likely to be dominated by the accretion disc emission, while three others show colours consistent with a red synchrotron component. We discuss the properties of the COMPTEL sample of quasars, as well as the implications our observations have for multiwavelength modelling of gamma-ray quasars. | ... Australia . ...

... AAS link ] . ... Our internal perspective makes it difficult to determine the spiral structure of our own galaxy. ... H I absorption, on the other hand, traces colder, denser gas that should be more confined in discrete clouds and perhaps discrete spiral arms. In addition, H I self-absorption (HISA) requires background H I emission at the same velocity as the foreground absorbing gas, thus introducing a much-needed constraint on the large-scale sightline geometry and kinematics. ...

... The close X-ray binary with relativisic jest, contained probably a black hole, Cygnus X-3 has been detected in first time in Gamma-rays at enegries higher 100 МeV (AGILE, Tavani et al., ... Koljonen K.I.I.; Hannikainen D.C.; McCollough M.L.; Pooley G.G.; Trushkin S.A. The hardness-intensity diagram of Cygnus X-3: revisiting the radio/X-ray states 2010, MNRAS, 406, 307-319. ... X-ray image of Cygnus X-3 (Chandra) . ... Light curves Cygnus X-3 in gamma-rays (AGILE) and in radio cm-bands (Ryle tel., ...

The Variable Gamma-Ray Source 2CG 135+01 ApJ, 497:L89-L91, 1998 7 h gamma AGN variability . gamma-radio-AGN-variability ADS query . ... Model for the High-Energy Emission from Blazars 1993ApJ.. ... Possible Production of High-Energy Gamma Rays from Proton Acceleration in the Extragalactic Radio Source Markarian 501 astro-ph/9803241 K.Mannheim . ... A theoretical unifying scheme for gamma-ray bright blazars astro-ph/9807317 G. Ghisellini, A. Celotti, G. Fossati, L. Maraschi, A. Comastri . ...

Astronomy Picture of the Day . ... 21.05.1997 . ... Palomar Observatory , 200-in Hale Telescope Explanation: New evidence bolsters once controversial claims that Gamma-Ray Bursts (GRBs) are the most powerful explosions ever found by humanity. Two weeks ago, an average GRB became instantly historic when prompt, coincident X-ray and optical emissions were identified. ... If GRBs do occur this far into our universe, then radio emission was predicted to peak about a week after the optical emission . ...

... Authors : V.V. Akimov , G.S.Bisnovatyi-Kogan , N.G. Leikov (Space Research Istitute, Moscow, Russia) . ... What differences CYGAM from traditional telescopes? Sky in the high-energy gamma-rays according to the data of SAS-2 (1972-1973), COS B (1975-1982), GAMMA 1 (1990-1992) and EGRET (1991-2000) . ... CYGAM characteristics according to results of Monte-Carlo simulations . What results may one expect after a year of CYGAM flight in the high apogee orbit? . ... Last updated on 10.06.03 ...

Most current theories for magnetospheric emission can be grouped into polar cap, outer gap, and nebular models. These models, at least in some cases, need not be mutually exclusive; the Crab pulsar (among others), for example, shows clear evidence for pulsed emission from the magnetosphere and unpulsed emission from the surrounding nebula. ... This suggestion is strengthened by observation of a distinct soft emission component, consistent with the cooling scenario, from several of these pulsars. ...

Gamma-rays from the GC . M.Chernyakova (DIAS), D.Malyshev (DIAS), F.Aharonian (DIAS, MPIK), R.M.Crocker(MPIK), D.I.Jones(MPIK) 1 10°x10° Count and TS maps (>300 GeV) Gamma-rays from the GC 2 TS maps of the GC at different energies 300 MeV ­ 3GeV 3 GeV ­ 30 GeV 30 GeV ­ 300 GeV Gamma-rays from the GC 3 4 Gamma-rays from the GC Lightcurve 5 Gamma-rays from the GC Source spectrum Model X-ray and low-energy emission come from the central object, probably SMBH accretion disk. ...

... May 21, 1997 . GRB970508 Delivers Predicted Radio Emission . ... Explanation: New evidence bolsters once controversial claims that Gamma-Ray Bursts (GRBs) are the most powerful explosions ever found by humanity. Two weeks ago, an average GRB became instantly historic when prompt, coincident X-ray and optical emissions were identified. ... If GRBs do occur this far into our universe, then radio emission was predicted to peak about a week after the optical emission . ... About APOD > . ...

We present Spitzer 3.6-160 О?m images, Spitzer mid-infrared spectra, and JCMT SCUBA 850 О?m images of the Sombrero Galaxy (NGC 4594), an Sa galaxy with a 109 Msolar low-luminosity active galactic nucleus (AGN). The brightest infrared sources in the galaxy are the nucleus and the dust ring. ...

. Lead Tungstate PbWO 4 . Application field . Scintillators . Structure . Tetragonal sheelite-type . Cleavage plane . (101) . Hardness (Moohs scale) . 3 . Growth method . Czochralski . Melting point . 1123 o C . Density: . 8.28 g/cm 3 . Wavelength of max. emission . 420-440 nm . Refractive index at emission maximum . 2.2 . Average decay time . 0.01 microsecond (gamma-rays, room temperature) . Max. crystal diameter . 50 mm . Cleaved PbWO 4 single crystal .

... 8 February , 2014 SAI seminar (Ryde et al 2010) 5 Thermal emission from GRB jet progenitor observer photon jet Photosphere (=1) · · · · Photons are not produced at the photosphere We have to calculate radiative transfer We need to know where the photons are produced We construct the expression for effective optical depth in relativistic flow considering random walk process in relativistic flow SAI seminar 6 8 ... 8 February, 2014 SAI seminar 28 ...

11 august 2014/Monday: Arriving, Registration . ... The variation of solar flare coronal X-ray source spatial properties. ... Melnikov V.F., Charikov Yu.E., Kudriavtsev I.V. Directivity of X-ray and gamma-ray emission from different parts of flaring magnetic loops. ... E., Melnikov V.F. Angular characteristics of polarization degree of hard X-ray emission from different parts of flaring magnetic loops. ... The thick target model and analytical calculations of the hard X-ray emission from solar flares. ...

INTEGRAL spectra of Galactic Bulge sources. Laura BarragАn Laura BarragАn. ... ISGRI // PICsIT FOV ~ 8є x 8є · JEM-X (Join European Monitor for X-rays) 3 ­ 35 keV Images FOV: 5є radius circle · SPI (Spectrometer on Integral) · OMC (Optical Monitoring Camera) INTEGRAL spectra of Galactic Bulge sources. ... Laura BarragАn Obtaining the data IBIS/ISGRI 81 sources 10 hours JEM-X 12 more significant sources 1 hour INTEGRAL spectra of Galactic Bulge sources. ...

Paolo Padovani . Original Version: `New Horizons from Multi-Wavelength Sky Surveys', B. McLean et al. eds., p. 257. ... Active Galactic Nuclei (AGN) are ideal sources for multi-wavelength studies as their emission can cover almost 20 orders of magnitude in frequency from the radio to the gamma-ray band. ... I will then briefly illustrate how currently available and forthcoming sky surveys will help in addressing some of the open questions of AGN studies. ... Figure 1 (65kb) . Figure 2 (23kb) . ...

... My suggestion is that the absorbers are due to a radiative bow shock by a galactic wind which preceeds the jet phase. ... final size: 200 jet radii . ... very light jet . ... density (full grid): [gif, 21MB] [gif, 2.1MB] . density (sideways bow shock) [gif, 27MB] [gif, 2.7MB] . The heavy shell is first accelerated and then fragments due to the Rayleigh-Taylor instability. density (shell piercing) [gif, 27MB] [gif, 2.7MB] . ... This page is maintained by Martin Krause ...

... Discovered originally in Fermi gamma-ray telescope data and labelled the Fermi Bubbles , the polarized radio counterparts of these structures were discovered with the Parkes telescope in 2012. ... The shocks are sites for cosmic ray acceleration. Emission from these cosmic rays explains the WMAP Haze observed at microwave wavelengths around the Galactic centre as well as the Bubbles wider-scale radio polarization and gamma-ray emission. ...

Microsymposium 40, abstract 88, 2004 (A4 format) GAMMA RAYS FROM MAJOR ELEMENTS BY THERMAL NEUTRON CAPTURE REACTIONS: EXPERIMENT AND SIMULATION FOR PLANETARY GAMMA-RAY SPECTROSCOPY. ... Then the calculation can be restarted by producing gamma rays and let them trans- GAMMA RAYS FROM MAJOR ELEMENTS BY THERMAL NEUTRON CAPTURE REACTIONS: N. Yamashita et al. port and react, with initial energies determined the outside multiplication and initial locations wh neutron capture reaction took place. ...

... STScI-PRC99-20 HUBBLE SNAPSHOT CAPTURES LIFE CYCLE OF STARS In this stunning picture of the giant galactic nebula NGC 3603, the crisp resolution of NASA's Hubble Space Telescope captures various stages of the life cycle of stars in one single view. ... This single view nicely illustrates the entire stellar life cycle of stars, starting with the Bok globules and giant gaseous pillars, followed by circumstellar disks, and progressing to evolved massive stars in the young starburst cluster. ...