HITOMASTER ivo://nasa.heasarc/hitomaster NASA/GSFC HEASARC Angelini et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Observation This table records high-level information for the observations obtained with Hitomi and provides access to the data archive. The Hitomi mission was launched on a JAXA H-IIA into low Earth orbit on February 17, 2016, at 5:45 pm JPS from Tanegashima Space Center. Hitomi was equipped with four different instruments that together cover a wide energy range 0.3-600 keV. The Soft X-ray Spectrometer (SXS), which combined a lightweight Soft X-ray Telescope paired with a X-ray Calorimeter Spectrometer, provided non-dispersive 7-eV resolution in the 0.3-10 keV bandpass with a field of view of about 3 arcminutes. The Soft X-ray Imager (SXI) expanded the field of view with a new generation CCD camera in the energy range of 0.5-12 keV at the focus of the second lightweights Soft X-ray Telescope; the Hard X-ray Imager (HXI, two units) performed sensitive imaging spectroscopy in the 5-80 keV band; the non-imaging Soft Gamma-ray Detector (SGD, two units) extended Hitomi's energy band to 600 keV. On March 27, 2016, JAXA lost contact with the satellite and, on April 28, announced the cessation of the efforts to restore mission operations. At that time Hitomi was in check-out phase and had started the calibration observations. Data were collected from six celestial objects (Perseus, N132D, IGR_J16318-4848, RXJ1856.5-3754, G21.5-0.9, and Crab) as well as black sky for a total of about one month of data. The data from these observations were divided into intervals of one day if the observation of a specific pointing was longer that one day. A sequence number was assigned to each observing day and within data from all instruments are included. The day division was mainly to limit the data size within a sequence number. There are in total 42 sequences, and each record in this database table is dedicated to a single sequence. The early observations do not contain data from all instruments and in cases the object was not always placed at the aim point. This database contains parameters to indicate which instrument was on and if the celestial source was in the field of view. The SXS was the first instrument to turn on and therefore all observations contain SXS data, although the thermal equilibrium was reached after March 4 2016. The second instrument was the SXI followed by the HXIs and, finally, the two SGDs. This database table was generated at the Hitomi Science Data Center processing site (Angelini, L., Terada, Y, et al., 2016, SPIE 9905E, 14) with additions to indicate which instrument was on and if the source was in the FOV. It was ingested into the HEASARC database in June 2017. This is a service provided by NASA HEASARC . 2016SPIE.9905E..14A https://heasarc.gsfc.nasa.gov/W3Browse/all/hitomaster.html Archive Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=hitomaster& GET text/xml 180 99999 true 173.4656378 -81.21692303 0.25 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=hitomaster GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_hitomaster&Action=More+Options&Action=Parameter+Search&ConeAdd=1 https://heasarc.gsfc.nasa.gov/xamin/vo/ssa?table=hitomaster& GET text/xml+votable query pointed archival FK4 360.0 500 10000 180 10000000 POS=173.4656378,-81.21692303&SIZE=0.25&REQUEST=queryData HITOMI 0.25 X-ray public hitomaster Hitomi Master Catalog name Designation of the Pointed Source meta.id;meta.main char nullable obsid Unique Observation/Sequence Number meta.id;obs char nullable ra Right Ascension (Pointing Position) degree pos.eq.ra;meta.main double nullable dec Declination (Pointing Position) degree pos.eq.dec;meta.main double nullable "time" Start Time of the Observation mjd time.start;obs double nullable exposure Effective Total Observation Exposure (s) s time.duration;obs.exposure double nullable sxsifonfov If SXS Is ON and Source in SXS FOV meta.code;instr.fov char nullable sxiifonfov If SXI Is ON and Source in SXI FOV meta.code;instr.fov char nullable hxi1ifonfov If HXI1 Is ON and Source in HXI1 FOV meta.code;instr.fov char nullable hxi2ifonfov If HXI2 Is ON and Source in HXI2 FOV meta.code;instr.fov char nullable sgd1ifonfov If SGD1 Is ON and Source in SGD1 FOV meta.code;instr.fov char nullable sgd2ifonfov If SGD2 Is ON and Source in SGD2 FOV meta.code;instr.fov char 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 sgd1_datamode SGD1 Datamode meta.code char nullable hxi1_datamode HXI1 Datamode meta.code char nullable sgd1_exp_cc3 SGD1 Effective Exposure CC3 s time.duration;obs.exposure double nullable sgd2_exp_cc1 SGD2 Effective Exposure CC1 s time.duration;obs.exposure double nullable pi_lname Proposal Principal Investigator Last Name meta.id.PI char nullable sgd2_datamode SGD2 Datamode meta.code char nullable sgd1_expo SGD1 Effective Exposure on Source (s) s time.duration;obs.exposure double nullable sxi_dclass1_thr SXI Dataclass/Threshold for First Datamode meta.code char nullable sxs_datamode SXS Datamode meta.code char nullable hxicode Code for HXI Data Processing meta.code char nullable lii Galactic Longitude (Pointing Position) degree pos.galactic.lon double nullable processing_version Version of Processing Script meta.version;meta.dataset char nullable hxi1_expo HXI1 Effective Exposure on Source (s) s time.duration;obs.exposure double nullable gencode Code for General Data Processing meta.code char nullable processing_date Date of Processing mjd time.processing double nullable hxi2_expo HXI2 Effective Exposure on Source (s) s time.duration;obs.exposure double nullable category_code Category Code meta.code;src.class short nullable sxs_fil_open Flag [YN] Indicates SXS Filter Open meta.code char nullable software_version Software Version Used in the Pipeline meta.version;meta.software char nullable sxs_fil_fe55 Flag [YN] Indicates SXS Filter Fe55 meta.code char nullable sxi_datamode1 SXI First Datamode meta.code char nullable sxscode Code for SXS Data Processing meta.code char nullable sxi_expo SXI First Mode Effective Exposure on Source (s) s time.duration;obs.exposure double nullable sxs_thr SXS Threshold Setting Code meta.code char nullable sxi_dclass2_thr SXI Dataclass/Threshold for Second Datamode meta.code char nullable stop_time Stop Time of the Observation mjd time.end;obs double nullable bii Galactic Latitude (Pointing Position) degree pos.galactic.lat double nullable sxi_expo2 SXI Second Mode Effective Exposure on Source (s) s time.duration;obs.exposure double nullable title Proposal Title meta.title;obs.proposal char nullable roll_angle Roll Angle degree instr.param;pos.posAng double nullable pi_fname Proposal Principal Investigator First Name meta.id.PI char nullable distribution_date First Distribution Date mjd time.creation double nullable sxs_adr Flag [YN] Indicates ADR Cycle Occurs in This ObsID meta.code char nullable caldb_version Version of CALDB meta.version;instr.calib char nullable sgd2_exp_cc2 SGD2 Effective Exposure CC2 s time.duration;obs.exposure double nullable sgdcode Code for SGD Data Processing meta.code char nullable subject_category Proposal Category src.class char nullable sxi_datamode2 SXI Second Datamode meta.code char nullable sxicode Code for SXI Data Processing meta.code char nullable country Proposal Principal Investigator Country or Collaboration meta.note;obs.observer char nullable public_date Public Date mjd time.release int nullable sgd1_exp_cc1 SGD1 Effective Exposure CC1 s time.duration;obs.exposure double nullable sgd2_exp_cc3 SGD2 Effective Exposure CC3 s time.duration;obs.exposure double nullable sgd1_exp_cc2 SGD1 Effective Exposure CC2 s time.duration;obs.exposure double nullable abstract Full Abstract meta.abstract char nullable sgd2_expo SGD2 Effective Exposure on Source (s) s time.duration;obs.exposure double nullable hxi2_datamode HXI2 Datamode meta.code char nullable