- At this time the only format available is a PNG.
Trailing virgule ('/') on URLs is desired, but not required, except when additional parameters are added to the service. Parameter values are case-sensitive (GraceIDs have capital letters, fileFormats are lower-case).
Table 1: List of parameters and their definitions
|Grace Database identifier of the detection event
||VOEvent Serial number - sequence and unique
||fits or csv
||format of the data stream to be returned
Note: ipac format no longer supported as of Aug 2023
Content-Type, MIME, Multipurpose Internet Mail Extensions:
Streams delivered by this service are tagged with Content-Type when possible to reflect the intent. Content-Length is also provided when available.
Table 2: List of content-type and their definitions
Streams may be tagged with Content-Disposition: attachment; filename=<string> (https://tools.ietf.org/html/rfc6266) where <string> is constructed using the <GraceID>, <Pkt_Ser_Num>, and file format extension as an aid to saving files when accessed interactively. Many browsers and web clients support RFC-6266 Content-Disposition with varying degrees of accuracy and success. In most intended use-cases of this program interface, the client will define the disposition, and Content-Disposition may be ignored by clients that would be using this program interface.
The requested product (file or stream) is returned if found with HTTP status 200. Query errors, missing, or undefined requests return HTTP status 400 (Bad Query), 404 (Not found) or other code as appropriate.
Under normal circumstances, NED-GWF products are available within a few minutes of receiving the VOEvent. NED does not provide real-time services, so availability of GWF services and products is not guaranteed. GWF products are generated as needed, upon receipt of a VOEvent notification. NED-GWF products are not archived.
Please note that NED processes Mock-SuperEvents (MS) to support testing of downstream users. NED does not maintain more than a few recent MS events and products online. Mock-SuperEvents are test events, not real observations, that are injected into the LVK pipeline to test and check end-to-end operation.
As of August 2023, in order to reduce run-time and data volume the ipac table format for galaxy lists is no longer generated, but they are still available for prior events. Note that FITS and CSV file formats are supported for all events.
Retrieve the top 20 list of galaxies in the final LALInference localization of event GW170817 sorted by 2MASS absolute K-band magnitude as a CSV output:
- Note: we only provide the NED-GWF products for the final LALInference localization.
Retrieve the full list of galaxies in the second analysis (Pkt_Ser_Num=2) of the event S200129m as a FITS output:
Retrieve the sky map visualization of galaxies in the second analysis (Pkt_Ser_Num=2) of the event S200129m as a png output:
Retrieve the VOevent XML file distributed by LVK in the second analysis (Pkt_Ser_Num=2) of the event S200129m: