RHESSI Flare List

2026-02-02 13:10:23Z

The RHESSI X-ray-based flare list is obtained by comparing the observing summary count rate in the 6 to 12 keV energy band to a threshold. The count rate threshold is determined from the background level; which is obtained using a 60 second running average. For an interval to be considered as a flare candidate, the count rate must be greater than 3*sigma above the background level. Variations in the count rate due to changes in attenuator state or decimation state are taken into account by use of the "corrected" count rate method, which empirically determines the corrections. The flare list is created during quicklook processing. The full list includes some events which are not necessarily of solar origin. The complete description can be found at https://hesperia.gsfc.nasa.gov/rhessi3/docs/qlook/hsi_flare_list.html.

	Role	Person	StartDate	StopDate	Note
1.	DataProducer	spase://SMWG/Person/A.Kimberley.Tolbert
2.	MetadataContact	spase://SMWG/Person/Olga.Y.Uritskaya
3.	GeneralContact	spase://SMWG/Person/Gordon.D.Holman

spase://VSPO/NumericalData/P_RHESSI_HDR_EVENTLIST

spase://VSPO/NumericalData/RHESSI/HESSI/EVENTLIST

spase://NASA/NumericalData/RHESSI/HESSI/EVENTLIST

Text

2002-02-12 02:15:24

2018-03-30 05:10:12

Flare

Start time

Peak

End

Dur

s

Peak

Peak Rate: peak counts/second in energy range 6-12 keV, averaged over active collimators, including background.

c/s

Total Counts

Total Counts: counts in energy range 6-12 keV integrated over duration of flare summed over all subcollimators, including background.

Energy

Energy: the highest energy band in which the flare was observed.

keV

X Pos

asec

Y Pos

asec

Radial

Radial Distance: distance from Sun center.

asec

AR

Flags

Quality Codes: Qn, where n is the total number of data gap, SAA, particle, eclipse or decimation flags set for event. n ranges from 0 to 11. Use care when analyzing the data when the quality is not zero. Flare Flag Codes: a0 - In attenuator state 0 (None) sometime during flare a1 - In attenuator state 1 (Thin) sometime during flare a2 - In attenuator state 2 (Thick) sometime during flare a3 - In attenuator state 3 (Both) sometime during flare An - Attenuator state (0=None, 1=Thin, 2=Thick, 3=Both) at peak of flare DF - Front segment counts were decimated sometime during flare DR - Rear segment counts were decimated sometime during flare ED - Spacecraft eclipse (night) sometime during flare EE - Flare ended in spacecraft eclipse (night) ES - Flare started in spacecraft eclipse (night) FE - Flare ongoing at end of file FR - In Fast Rate Mode FS - Flare ongoing at start of file GD - Data gap during flare GE - Flare ended in data gap GS - Flare started in data gap MR - Spacecraft in high-latitude zone during flare NS - Non-solar event PE - Particle event: Particles are present PS - Possible Solar Flare; in front detectors, but no position Pn - Position Quality: P0 = Position is NOT valid, P1 = Position is valid Qn - Data Quality: Q0 = Highest Quality, Q11 = Lowest Quality SD - Spacecraft was in SAA sometime during flare SE - Flare ended when spacecraft was in SAA SS - Flare started when spacecraft was in SAA Events which have no position and show up mostly in the front detectors, but were not able to be imaged are flagged as "PS". Events which do not have valid position are only confirmed to be non-solar if the NS flag is set.