... This algorithm is designed to pick up sources that have either extents much greater than that of the points-spread function or any other sources that were not picked up by the point-source detection algorithm. ... nESources - the total number of extended-sources detected so far . ... eLevelImage - a two-dimension array that stores the pixels assigned to the extended-sources- each pixel assigned to the source is set equal to the number assigned to the source. ... x - stores the pixel index i . ...

Next: Astrometry Up: Star DetectionAstrometry, and Previous: Restoration Methods Evaluated . The first criterion used to evaluate the restoration techniques is the ability to detect stars in the restored image without ``detecting'' noise and restoration artifacts. We used a simple detection algorithm which finds the local maximum in the restored image above a user-supplied threshold. ... Numerous artifacts around bright stars make star detection very difficult in the linear restorations. ...

HI source finding algorithms Comparing the general purpose Duchamp algorithm to a purpose built HI source finding algorithm Talk Outline · Common elements of source finding algorithms · The Duchamp algorithm · · · · Algorithm Strengths Draw-backs Improvements · An alternative HI source finder algorithm · Key differences · Algorithm · Preliminary work · Conclusion Common elements of general ...

... CELLMAP -- prepares x-ray qp file for DETECT. ... Running Snrmap .. ... Input xray Qpoe : xdata $rp110590.qp Output xray image : rp110590_cmp ROSAT PSPC Cellsize in arcsecs - 30 [h/b]| 45 [s]| 60 [s/h/b]| 120 [s/h/b]: 30 Energy Band (soft|hard|broad) (broad): hard xdata $rp110590.qp[bl=20,pi=52:201][128:639,128:639] - rp110590_cmp.imh add rp110590_cmp.imh,cellsize = 30 rp110590_cmp.imh updated xdata $rp110590.qp[pi=52:201] de snrmap Input xray image : rp110590_cmp Output snrmap ...

... Download the code document. A new version will be released soon with a more detailed document. An X-ray source detection algorithm, optimally designed to detected faint extended sources, making use of Voronoi tessellation and Friend-of-Friend technique. ... This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License. Download sweepline.py . ... ROSAT 400d . ROSAT MACS . ROSAT WARPS . ROSAT REFLEX . ... XMM XCS . ...

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. ...

... The measured gravitational waves match those expected from two large black holes merging after a death spiral in a distant galaxy, with the resulting new black hole momentarily vibrating in a rapid ringdown . ... The featured illustration depicts the two merging black holes with the signal strength of the two detectors over 0.3 seconds superimposed across the bottom. ... Two Black Holes Merge . Advanced LIGO: Gravitational Wave Detectors Upgraded . ... A Step Toward Gravitational Wave Detection ...

... 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. ...

... 2016 February 11 . LIGO Detects Gravitational Waves from Merging Black Holes . ... The first-ever detection was made by both facilities of the Laser Interferometer Gravitational-Wave Observatory (LIGO) in Washington and Louisiana simultaneously last September. ... The measured gravitational waves match those expected from two large black holes merging after a death spiral in a distant galaxy, with the resulting new black hole momentarily vibrating in a rapid ringdown . ... About APOD | ...

... The standard science quicklook processing produces over a dozen sky maps at each downlink, and these maps are automatically searched for potential transient point sources. ... We have found that a heuristic modification of a formula derived by Li & Ma (1983) provides reasonably accurate estimates of p -values for point source detections even for very low p -value detections. ... Case 1u. The most straightforward approach uses the signal , where . ... To get a p -value, use . ...

Next: Regularization of the Up: Regularization from significant Previous: Regularization from significant . Van Cittert's iteration is: . ... The regularization by the significant structures leads to: . The basic idea of our method consists of detecting, at each scale, structures of a given size in the residual and putting them in the restored image . ... is the restored image, which does not contain any noise, and is the final residual which does not contain any structure. ...

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). ...

... 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. ...

... Flux density at 1 GHz (/Jy): 4? Spectral Index: 0.4 . Radio: Arc in NE, merging with thermal emission in S. Optical: Detected. X-ray: Detected. ... Molonglo at 408 MHz (3') and Parkes 64-m at 5 GHz (4'). ADS . ... Whiteoak & Green 1996, A&AS, 118, 329. MOST at 843 MHz (43''?59'': S=3.8 Jy). ... Green et al. ... Parkes 64-m OH observations. ... ASCA survey observations. ... detailed listings | summary listings . Dave Green/Cambridge, UK/ D.A.Green@mrao.cam.ac.uk ...

... Jitter imaging (also known as microscanning ) is probably one of the most efficient ways to perform astronomical observations in infrared. ... This paper discusses the various issues attached to each data processing step and offers several algorithms, having in mind an automatic data processing in pipeline mode (i.e. without user interaction) as intended for the VLT. ... Poisson offset generation . ... Frame offset detection . ... Peak detection algorithm . ... Header offsets . ... Linear average . ...

NMW survey overview . Access image archive . ... The New Milky Way survey aims to detect bright (V<13.5) optical transients near the Galactic plane using an automated wide-field (8x6 deg.) system capable of surveying the whole Milky Way area visible from the observing site in one night. ... All images obtained during the transient search survey are available online (please use the image archive access form ). ... Images per field: . ... Images per night: . ... Milky Way imaging time: . ...

Automatic Detection of NEOs in CCD Frames . ... CCD frames obtained with modern telescopes with robotic operation allow carrying out standard observation programs for detection of peculiar objects on stellar backgrounds, as is the case of Near Earth Objects (NEOs). ... In this paper, we present original algorithms for automatically detecting dim NEO images in telescope frames, considering both sidereal and differential tracking [2]. ...

... Space Research Institute . ... Regional GOFC-GOLD Workshop for Northern Eurasia Regional Information Network (NERIN) . DETECTION AND VALIDATION OF LAND-COVER CHANGE . ... GOFC-GOLD Northern Eurasia Regional Information Network - (NERIN) and Land Cover Implementation Team offer a workshop to introduce new approaches to change detection and global efforts to develop validation strategies in the context of multi-sensor analysis. ...

... MASTER Net is 56 square degrees per 1 exposition . ... 06 Dec 2015: GRB 151205B: MASTER-NET early optical observations GCN18665 . ... 18 Nov 2015: GRB 151118A: MASTER-NET optical observations GCN18613 . ... 12 Nov 2015: GRB 151112A: MASTER-NET optical limit GCN18591 . ... 07 Nov 2015: GRB 151107A: MASTER-NET optical observations GCN18565 . ... 31 Oct 2015: Five OTs detected by Global Robotic MASTER Net ATel8232 . ... 02 Oct 2015: GRB 151001B: MASTER-NET early optical observations GCN18380 . ...

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