SMM HXRBS Data Archive 
Kim Tolbert 14-Jul-2015
Updated     20-Jul-2024
Updated     05-Aug-2024

SMM was in operation from February 1980 to December 1989. The Hard X-Ray Burst Spectrometer (HXRBS) observed 12,773 solar flares.  Information about the instrument and solar flare identification methods are in
https://hesperia.gsfc.nasa.gov/smm/hxrbs/hxrbs_event_list_description.pdf or
https://umbra.nascom.nasa.gov/pub/smm/hxrbs/ospex_fits/hxrbs_event_list_description.pdf  (SDAC)
The SDAC also has links to yearly HXRBS event list text files at https://umbra.nascom.nasa.gov/smm/hxrbs.html.

FITS files containing the SMM HXRBS data for all of the solar flares observed by HXRBS are at
https://hesperia.gsfc.nasa.gov/smm/hxrbs/ and
https://umbra.nascom.nasa.gov/pub/smm/hxrbs/ospex_fits/  (SDAC)
The files are organized in year directories and are named hxrbs_yyyymmdd_hhmm_hhmm_flarenumber.fits, where yyyymmdd_hhmm is the start time, the second hhmm is the end time, and flarenumber is the number assigned to the flare by the HXRBS team.  

(Note: Those FITS files were created by Kim Tolbert in 2014 from the original HXRBS team's files which are at https://umbra.nascom.nasa.gov/pub/smm/hxrbs/fits.  They are essentially the same - the main difference is the file name. The original file name contained only the HXRBS flare number (hxrbs_flarenumber.fits), so was more cumbersome to work with; the new file name includes the start and end date and time, as well as the HXRBS flare number).

You can plot time profiles and spectra, and do spectral analysis on the HXRBS data using these files in the OSPEX package (https://hesperia.gsfc.nasa.gov/ssw/packages/spex/doc/ospex_explanation.htm).  These files will automatically be found and copied to your local computer by OSPEX when you use the OSPEX GUI and select the Browse / On remote sites option in selecting your input.

You can also plot the HXRBS data in SHOW_SYNOP. In SSWIDL, type show_synop, select SMM/HXRBS in the pulldown menu, and click download and display. The remote file will automatically be found.

An IDL save file of the HXRBS event list is in $SSW/ssw/smm/hxrbs/idl,  You can read it via
	restore,'hxrbs_flare_catalog.sav',/verb
This restores the variable fldata that looks like this:
	IDL> help,fldata
	FLDATA          STRUCT    = -> FLARE Array[12773]
	IDL> help,fldata,/st
	** Structure FLARE, 8 tags, length=104, data length=96:
	   START_SECS      DOUBLE           35797610.
	   PEAK_SECS       DOUBLE           35797775.
	   FLARE_NUM       INT              1
	   DURATION        LONG               522
	   PEAK_RATE       LONG               177
	   TOT_COUNTS      LONG             20080
	   REGION          INT           2287
	   FLAGS           BYTE      Array[64]
(START_SECS and PEAK_SECS are seconds since 1-Jan-1979, and can be shown in absolute time format using anytim, e.g. print,anytim(fldata[0].start_secs,/vms) )