Next: SLIM: A Program to Simulate the ACS Spectroscopic Modes . ... Previous: On the Fly Bad Pixel Detection for the Chandra X-ray Observatory's Aspect Camera . ... We here present an overview of Celldetect , a source detection program for Chandra. ... Celldetect identifies point sources in the presence of background. ... At each point where a detection is attempted, celldetect uses an appropriately sized cell. ... The background statistics in celldetect change as the cell size increases. ...

From limits to detection of a gravitational wave signal George Hobbs ATNF PPTA team. ... Jenet et al. 2005 Must look for correlated residuals Need ~20 pulsars, observed of ~5 years with rms timing residuals ~100ns Gravitational wave detection Basic ideas Jenet et al. ... 2006 New limit technique (Bill's talk) Improve timing residuals Bayesian Detection technique Gravitational wave detection A Bayesian technique for detecting gravitational waves · Work carried out by Y. Levin and R. van Haasteren. ...

... My source shows only 5 counts in a short 5 ksec Chandra exposure. ... We calculated the significance of observing 5 counts given the expected background counts of 0.1 using spfunc.gammp(5,0.1) =8e-8. ... I believe more fine tuning in computing this p-value is necessary but I wish to address that computing the p-value assuming Ho: background counts=0.1 vs. ... For a given rescaled background (b/50), the p-value is the probability that the counts in the source region can exceed the observed counts. ...

We present submillimeter statistical detections of galaxies discovered in the 5'У?5' Spitzer Early Release Observations (to ~4-15 ЮМJy 5 Я? at 3.6-8 ЮМm, 170 ЮМJy at 24 ЮМm) through a stacking analysis of our reanalyzed SCUBA 8 mJy survey maps and a Spitzer identification of a new submillimeter point source in the 8 mJy survey region. ... We also marginally detect the Spitzer 24 ЮМm galaxies at 850 ЮМm at 97% confidence and place limits on the mean submillimeter fluxes of the 3.6 and 4.5 ЮМm sources. ...

Detected Supernovae . The search have produced till now the detections of 4 SNe. ... This result highlights the power of infrared monitoring in detecting Obscured SNe and indicates that optical surveys are probably missing a significant fraction of SNe, especially in obscured systems such as starburst galaxies. ... In Fig. we show the archival SOFI image of NGC3256 (left) and the first image obtained in 2001 (right) where SN2001db has been detected. ...

... Meta Index / Home Page / Description The wavelet detection algorithm itself does not use any separate background estimate. ... For the parameter I choose to use a value twice the size of the wavelet scale under investigation (so for every scale a different background map is generated). After one iteration the input for the background estimate is the original image minus the sources, detected at scales smaller or equal to the wavelet scale under investigation. ...

... 28.11.2001 . ... Credit: Greg Bacon ( STScI /AVL) Explanation: By directly detecting the atmosphere of a planet outside our Solar System , humanity has taken another small step toward finding extraterrestrial life . ... November 2001 . ... 2001 2002 . ... NASA Web Site Statements, Warnings, and Disclaimers . NASA Official: Jay Norris. ... Publications with keywords: extrasolar planet . Publications with words: extrasolar planet . ... Atmospheres Detected on Two Extrasolar Planets . ...

... 2001 November 28 . Extra-Solar Planetary Atmosphere Detected . ... Explanation: By directly detecting the atmosphere of a planet outside our Solar System , humanity has taken another small step toward finding extraterrestrial life . The unexpected detection by David Charbonneau ( Caltech ) and associates came from Hubble Space Telescope observations of Sun -like star HD 209458 . ... About APOD | ...

... During the analysis of the surveys carried out on RATAN-600, it was found that almost one fifth of the detected sources shows significant radio flux variations. ... We used the data from "Cold" radio surveys carried out with RATAN-600 in 1980-1994 to search for radio sources with significant flux variability. ... On possibility of detection of variable sources using the data of Cold surveys carried out on RATAN-600. ... Detection of Variable Sources Using the Data of "Cold" Surveys. ...

... 2015 . ... Observations using the Arecibo S-band (2380 MHz, 12.6 cm) planetary radar system started in 1976 and its power and sensitivity were greatly improved with the telescope upgrade and Gregorian-dome installation in the mid-1990s. Below, we show the number of near-Earth asteroids attempted and detected since the radar program resumed in 1998. ... The number of NHATS objects detected with Arecibo similarly jumped in 2012, and 2015 was again a record year, where we detected 23 of these objects. ...

Next: Wavelength calibration Up: Reduction using Standard Previous: Order Definition: Methods . ... The algorithm accepts frame which can be mildly contaminated by particle hits, bad columns, order gaps due to absorption lines, as found in FLAT or STD . ... the interorder background is roughly constant over the frame. the slope of the orders is in the range ]0., ... For a background estimate without previous order definition, consider the echelle command BACKGROUND/SMOOTH . ... LOAD/TAB order :X :Y . ...

Class 1 Introduction, Background History of Modern Astronomy The Night Sky, Eclipses and the Seasons Kepler's Laws Newtonian Gravity General Relativity Matter and Light Telescopes Class 2 Solar System Characteristics Formation Exosolar Planets Class 3 Stars The Sun Stellar Evolution of Low and High Mass Stars Deaths of Stars Exotic Stars Class 4 Galaxies Galaxy Classification Formation of Galaxies Galactic Evolution ... So far, one planet has been studied by this method. ...

Proceedings of the Particle Physics and Early Universe Conference (PPEUC). For this paper: postscript PPEUC CMB index 1 Introduction .. ... A new statistic is discussed, designed to detect isolated coherent step-like discontinuities produced by cosmic strings present at late times. ... The statistical variable considered is the Sample Mean Difference (SMD) between large neighbouring sectors of CMB maps, separated by straight lines in two dimensional maps and points in one dimensional maps. ...

Next: Gamma-Ray Bursts Up: Detection rate of binary Previous: Detection rate of binary . Figure: A schematic dependence of the detection rate ratio on the detector sensitivity (the upper scale) and the limiting distance from which binary NS (1.4+1.4M , the middle scale) and binary BH (8.5+8.5M , the bottom scale) mergings can be detected. ... At the end of this segment evolutionary effects can affect the detection ratio (the dashed line). ...

The deferred photometric pipeline of SNLS uses only photometry to detect and classify type Ia supernovae (SNe Ia). The advantages of a photometric sample include larger number of events classified as type Ia, larger redshift coverage and no need for spectroscopic observations. ... First, a subtracted image stack treatment was developed to reduce the number of non SN-like events using morphological component analysis. ... Second, a new classification using photometric SN redshifts is introduced. ...

Disastrous earthquakes happen 100 to 200 times a year. ... There is a chance that the data of ionospheric plasma observations hold an answer to the latter question. Satellites and ground-based facilities may detect earthquake precursors in the ionosphere a few hours or days before the main shock. ... ULF "Hz"-oscillations have been recorded several hours before the main shock in a narrow magnetic field tube (40...100 km along the satellite trajectory) conjugated with epicenter of the earthquake. ...

Galaxies are diffuse images which must be detected against a background of finite brightness with noise. Those galaxies which have the highest contrast with respect to this background are the most easily dectect. Low surface brightness galaxies are ones in which the contrast with respect to the background sky brightness is low, as such they are difficult to discover and therefore are easily missed. See some representative picture of these objects in the Galaxy Gallery.

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... Data Handling and Products > Data Reduction FAQ > Why do I get the message that "no slits could be detected", even though in the raw frames I can clearly see the slits? ... Observing with ESO Telescopes . ... ESO-MIDAS . ... ESO Data . ... ESO HST Image Galleries . ... ESO Data Access Policy . ... ESO Science Newsletter . ... ESO Annual Reports . ... Seminars at ESO Santiago . ... Seminars at ESO Garching . ... ESO Telescope Bibliography . ... Last Update: 04.04.14 ESO . ...

The three panels show different components of near-infrared background light detected by the Hubble Space Telescope in deep-sky surveys. ... When all the stars and galaxies are masked, the background signals can be isolated, as seen in the second and third panels. The middle one reveals intrahalo light from rogue stars torn from their host galaxies, and the panel on the right captures the signature of the first galaxies formed in the universe. ...