SWIFTGUANO ivo://nasa.heasarc/swiftguano NASA/GSFC HEASARC Swift Project; HEASARC 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Source Event The Swift Observatory provides event-level data from the Burst Alert Telescope (BAT) on demand in response to transients detected by other observatories/instruments. This capability, named "Gamma-ray Urgent Archiver for Novel Opportunities" (GUANO), was introduced in 2020. In normal operations, BAT records the arrival time (to 100-microsecond accuracy), location (in detector coordinates), and energy (in one of 80 bins from 15 to 350 keV) for each individual count that strikes the detector. These data, referred as event-by-event (or event), because of the large effective area of the BAT, produces a large data volume that cannot all be stored onboard or telemetered to the ground. For this reason, the BAT has relied on the performance of its onboard real-time detection algorithms, and only preserves event data and telemeters them to the ground around the time of events that trigger these onboard algorithms. The GUANO implementation allows to download BAT event data that did not trigger on board. Upon receiving an alert from different observatories, an autonomous spacecraft-commanding pipeline requests to download from the Swift satellite the BAT event data around the time of the GUANO event with a time window, typically around 200 seconds. The satellite does not slew; therefore, only BAT event data are available for the GUANO event and these data are tagged with a sequence number associated with the ongoing observation containing the GUANO time window. This table records the times of the GUANO events from different observatories from which Swift was able to download the BAT event data together with the directory and file names where the event are located in the archive. There is one record for each trigger by an external observatory that requested BAT event data; therefore, it is possible that multiple records are associated with the same event. This contents of this database table are generated at the Swift processing site. During operation, it is updated for any new GUANO trigger. These updates are then delivered to the HEASARC and ingested into the HEASARC database in a timely fashion. Note that some parameters (specifically, the galactic coordinates) have been added and are populated by the HEASARC. This is a service provided by NASA HEASARC . 2020ApJ...900...35T https://heasarc.gsfc.nasa.gov/W3Browse/all/swiftguano.html Archive Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=swiftguano& GET text/xml 180 99999 true 291.00343 -89.04906 0.416666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=swiftguano GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_swiftguano&Action=More+Options&Action=Parameter+Search&ConeAdd=1 SWIFT 0.416666666666667 Gamma-ray public swiftguano Swift Gamma-ray Urgent Archiver for Novel Opportunities (GUANO) name Designation of the GUANO Event meta.id;src char nullable obsid Swift Unique Observation Number (Target_ID + Obs_Segment) meta.id;meta.main char nullable ra Right Ascension (Swift BAT Pointing Position) degree pos.eq.ra;meta.main double nullable dec Declination (Swift BAT Pointing Position) degree pos.eq.dec;meta.main double nullable start_time Start Time of the Observation mjd time.start;obs double nullable trigger_time Time of the External Trigger time.epoch;obs char nullable trigger_start_time Trigger Start Time for BAT Events Collection time.epoch;obs char nullable trigger_stop_time Trigger Stop Time for the BAT Events Collection time.epoch;obs char nullable trigger_exposure Requested Exposure s time.duration;obs.exposure double nullable archive_date Public Date mjd time.release int nullable lii Galactic Longitude (Swift BAT Pointing Position) degree pos.galactic.lon double nullable eventfile1 First Event File Name meta.dataset;meta.file char nullable directory Top Directory Name Where the Data Are Located meta.dataset char nullable processing_date Date of Processing mjd time.processing int nullable eventfile2 Second Event File Name meta.dataset;meta.file char nullable bii Galactic Latitude (Swift BAT Pointing Position) degree pos.galactic.lat double nullable processing_version Version of Processing Script meta.version char nullable roll_angle Roll Angle (degree) degree instr.param;pos.posAng double nullable num_processed Number of Times a Sequence Has Been Processed meta.number short nullable stop_time Stop Time of the Observation mjd time.end;obs double nullable unique_id Unique Identifier for Each Entry in this Catalog meta.id int nullable "__x_ra_dec" System unit vector column double nullable "__y_ra_dec" System unit vector column double nullable "__z_ra_dec" System unit vector column double nullable "__row" System index column char nullable