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Skymap Viewer shows GW event information visually on the sky
A "skymap" is a probability density on the celestial sphere: for the position of the source of the GW
for poster explaining interface see
SV is an astronomical information system
zoom to arcsecond
multi-wavelength imagery gamma to radio
catalogs of galaxies and of galaxy clusters
links to NED/SIMBAD
local horizon and sun and moon
SV can show a skymap
contour plot with 9 decile contours
galaxies from GWGC catalog shown with size~likelihood
skymap histogram in latitude/declination
library of simulations "First2Years"
SV can show collections of rectangles on the sky
can get input directly from GraceDB (click button "view in Skymap Viewer")
add your own observation to GraceDB with the web form input
list of RA, list of Dec, list of sizes
Skymaps can be represented as
A Healpix/FITS file as built by LVC position reconstruction pipelines
A skymap.json file, with contour lines precomputed, and rich metadata
The former needs to be converted to the latter for input to SV (
do it with this form
Skymaps can be utilized from
GraceDB: click the button labelled "View in Skymap Viewer!"
Your own software: use
to input the skymap and/or the observations
data release (see
How you can use Skymap Viewer
See galaxies likely to contain the GW source
click the button "Show Weighted Galaxies"
See the skymap against the sun, moon, milky way, and local horizon
fill in longitude, latitude (eg Pasadena = -118,34)
date comes from skymap, or edit it, or click "Now", then "Show Sky"
See the observation footprints that your fellow observers have taken
In GraceDB, click on "see it in Skymap Viewer", then click "Show Bulletin Board" at upper left
Try out your observation planning tool
show proposed observations that tile the skymap, by converting to JSON and put into the web form
- 16 Dec 2014
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Topic revision: r7 - 2018-05-29, adminuser
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