Skymap Viewer [public]
- 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 here
- 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!" example
- Your own software: use this form to input the skymap and/or the observations
- The First2Years data release (see here and here)
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
--
RoyWilliams - 16 Dec 2014
This topic: LV_EM > SkymapViewer
Topic revision: 2018-05-29, adminuser