Proposal Identi cation No.: A1077 Date Received: 1997-Dec-13 15:15:31 Technical Page Proposal Type: Short General Category: Astronomy Sub-Category: Spectroscopy Observation Category: Extragalactic Total Time Requested: 40 Hours Proposal Title: A 21-cm Study of 127 Newly Discovered, Nearby LSB Galaxies ABSTRACT: We have discovered approximately 130 new low surface brightness galaxies believed to lie with in 3,000 - 8,000 km/s, including the rst known contingent of very red LSB galaxies. ...

Supernova 2009js in NGC 918 . This page is devoted to information on Supernova 2009js in NGC 918 . Basic information on this SN, including the last reported brightness, on this Supernova can be found on the main page . Information on the original web pages for many of these images can be found on the updates and links web pages. Discovered independently by Lick Observatory Supernova Search (USA) and Koichi Itagaki (Japan). ... 2009/10/11.44 . 17.2 . ... Joseph Brimacombe . ...

A team of U.S. and German astrophysicists have made the first ever detection of X-rays coming from a comet. ... Following the initial detection, the team reported repeated X-ray emissions from the comet over the next 24 hours. ... One preliminary theory is that X-ray emission from the Sun was absorbed by a cloud of gaseous water molecules surrounding the nucleus of the comet, and then were re-emitted by the molecules in a process physicists call "fluorescence." ... Comets . ...

In this gallery are many images of Low Surface Brightness Galaxies which have recently been discovered and analyzed. ... The central surface brightness of this galaxy is 24.28 . Malin 2 This galaxy is another huge disk galaxy with a scale length of 15 kpc and a redshift of 15000 km/a. The high surface brightness knot in one of its spiral arms actually has the same color, luminosity and H-alpha equivalent width as the entire Large Magellanic Cloud . ... Truly it is a Low Surface Brightness Galaxy. ...

... The Galactic low-mass X-ray binary GS 2023+338 was discovered during the burst on May 22, 1989 with the Japanise satellite Ginga (aka Galaxy). The flux reached 17 crabs (this unit of flux measurement is an bright X-ray source, Crab Nebula) at 10-35 keV. ... No other radio telescope worldwide carried out multi-frequency measurements. ... Upon 14 days the radio flux fell below the detection level at the RATAN-600 in relation to the decrease of the X-ray flux. ...

The spectrophotometrical complex of the 6-m telescope in Nasmyth-1 focus . ... A new sample of 360 blue compact galaxies with a strong star formation was build on the base of the Second Byurakan Survey. ... More that 20 galaxies with the extremely low-abundances of heavy elements in the range of 1/30-1/10 of the Sun's one, were found. ... During the 15-years observation term near 500 spectra of the unique source SS~433, from which the relativistic jets were found for the first time, were obtained. ...

HST Call for Proposals and HST Primer for Cycle 24 . ... Hubble Space Telescope Primer for Cycle 24 > Chapter 5: Observing Considerations > 5.1 Bright-Object Constraints . ... 5.1.1 ACS, COS & STIS . ... Data may also be affected by bright objects at limits that are substantially fainter than the safety limits discussed in the following sections. ... Bright object count rate limits are mode dependent. ... For the STIS MAMAs, these limits are given in Section 7.7 of the STIS Instrument Handbook . ...

... Sources found in the local detection step (task eboxdetect ) at significance levels (column SIGMA of eboxdetect source list) exceeding a user-specifiable threshold (input parameter mlmin ) in the respective energy band are removed from the image using a suitable PSF and source brightness dependent cut-out radius (determined to be the radius at which each source contributes more than a user-specifiable number of counts/arcsec to the background; parameter scut ; default value: 0.01). ...

... They are concerned with Attitude Control System of the spacecraft, satellite visibility from tracking stations, limits on the satellite autonomous operations during the orbit, and needs for auxiliary operations with the spacecraft. ... Among the operational constraints the most important one is the number of programmed slews per orbit, which determines the maximum number of radio sources to be observed during one orbit. ... System temperature (K) . ... Progress of the RadioAstron Project in Pictures...

... It provides long range planning information to the scheduling team; it provides bright object, timing, and orientation information to the observation planning team; and it provides graphical description of the observations and their constraints. ... The GUI graphically displays the constraints that are computed by Spike and stored in the description files and in the database. ... BOAS processes all bright objects that have entered the database since the last time BOAS was run. ...

... Master . ... About Space Monitoring Laboratory, scientific directions, instruments, contacts . ... 20.06.2012 . ... 27 Apr 2012: GRB 120427A: MASTER follow up observations GCN13274 . ... 29 Mar 2012: MASTER OT 123412-632503 detection during Swift trigger 518853 ATel4007 . 26 Mar 2012: GRB 120323A: MASTER follow up observations GCN13116 . ... 29 Jan 2012: GRB 120129A: MASTER optical observations GCN12907 . 06 Jan 2012: GRB 120106A: MASTER Early OT marginally detection GCN12818, GCN12811 . ...

Amalthea . Jupiter V . Amalthea [am-al-THEE-uh] is one of Jupiter's smaller moons. ... These four images of Jupiter's moon, Amalthea, were taken by Galileo's solid state imaging system at various times between February and June 1997. ... Amalthea, whose longest dimension is approximately 247 kilometers (154 miles) across, is tidally locked so that the same side of the satellite always points towards Jupiter, similar to how the near side of our own Moon always points toward Earth. ...

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Several tiny moons have been discovered recently, most from ground based imagery! With these discoveries, Uranus joins the jovian planets in having a number of small moons in irregular orbits. ... Two new moons of Uranus , provisionally known as Uranus XVI (S/1997 U 1) and Uranus XVII (S/1997 U 2), have been discovered. ... Caliban was discovered by Brett Gladman , Phil Nicholson, Joseph Burns, and JJ Kavelaars using the 200 inch Hale telescope ; the first images were taken 1997 Sept 6 and 7. ...

Supernovae are simply stars which explode. ... To understand supernovae, we need to understand stars. ... In this stage our Sun will swell up hundreds of times its current size, swallowing the Earth, and glowing hundreds of times brighter than it is now. ... Stars more than 10 times the mass of our sun have much more exciting lives. ... A Type II supernova to be precise. ... Since 1995 two teams have been discovering these objects: Our team, the High-Z SN Search, and the Supernova Cosmology Project. ...

Circularly polarized emission from the transient bursting radio source GCRT J1745-3009: Emission from magnetized dw arf ? ... Size < 8.R. Brightness temperature >1010 K for distance >1 pc, and circular poln. rules out thermal and incoherent synchrotron emission. ... Flare stars (typically dwarf stars of class G to M) in the Galaxy could emit strong high Cir. Pol. radio emission. ... Comparison with flare star Cir. ... GCRT could be outbursts from a highly subsolar flare star with a distance 4 kpc. ...

In autumn 1994, two groups of astronomers announced that they had discovered Cepheid variable stars in a distant cluster of galaxies. ... As the term suggests, variable stars change in brightness over time. ... Variable stars are an ideal way to get high-school students doing real science, with real data, from the real sky. ... a sky chart to find the stars . ... Students can use the nearby stars to estimate the magnitude of Delta. ... Locate the star Delta in Cepheus and estimate its brightness . ...

Coronal "hole" on the Sun . ... As a result of the observations of solar eclipse on February 15, 1961 at wavelength 21 cm the lower brightness region of corona was discovered (detail N5 on figure 1) and it's location on east nimbus of the Sun was determined (figure 2). ... Subsegently such phenomena were named "Coronal Holes". Figure 1. ... The detail N5 is Coronal Hole. ... The location on disk of the Sun radiation details of corona at wavelength 21 cm. ...

... Arp 220: Spirals in Collision . ... NICMOS , HST , NASA Explanation: Arp 220 is the brightest object in the local universe . ... Arp 220 was cataloged as a peculiar galaxy in the 1960s. In the late 1980s, it was discovered to be an ultraluminous infrared galaxy and headed a list compiled from observations with the now-defunct IRAS satellite . ... Publications with keywords: spiral arms - Arp 220 . Publications with words: spiral arms - Arp 220 . ... One Armed Spiral Galaxy NGC 4725 . ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... A bright nova has recently been discovered in the constellation of Delphinus (The Dolphin). ... The nova was confirmed late on August 14 at a magnitude of 6.3 (in a dark sky the faintest naked-eye stars are approximately 6.0 magnitudes - the lower the magnitude the brighter a star). ... Nova explosions occur in binary systems composed of a star similar to our Sun but only ~1/10 of its mass, and a star called a white dwarf. ...