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Timelines and Mission Information

Hitomi was the sixth in the series of X-ray astronomy missions developed by ISAS/JAXA. It was launched into low Earth orbit on Feb 17 , 2016 at 5:45 pm JPS from Tanegashima Space Center in Japan. Hitomi is equipped with four different instruments that together cover a wide energy range 0.3-600 keV.

Main Hitomi components

Diagram of the complete Hitomi satellite, with primary subsystems marked
Soft X-ray Spectrometer (SXS) The SXS consists of two components, the X-Ray Telescope (XRT), and the X-ray Calorimeter Spectrometer (XCS). The XRT is a lightweight mirror of the same heritage as the BBXRT, ASCA, and Suzaku missions. The XCS is a 6x6 array of similar design to the Suzaku XRS and provides non-dispersive 7 eV resolution in the 0.3-10 keV bandpass with a field of view of about 3 arcmin.
Soft X-ray Imager (SXI) The SXI consists of an imaging mirror and a CCD camera. The camera uses next-generation Hamamatsu CCD chips with a thick depletion layer, low noise, and almost no cosmetic defects. A mechanical cooler ensures a long operational life at -120C. The overall quantum efficiency and spectral resolution is better than the Suzaku XIS, and the response is optimized for higher energies. The imaging mirror has a 6-m focal length, and a diameter no larger than 45 cm.
Hard X-ray Imager (HXI) The HXI consists of two identical mirror-detector pairs. It has conical-foil mirrors with graded multilayer reflecting surfaces that provide a 5-80 keV energy range. The detector is a hybrid double sided silicon strip (DSSD) CdTe pixel array. It provides a 9 arcmin x 9 arcmin FOV, spectral resolution of 1 keV at 60 keV, and timing accuracy of < 10 msec; it operated at 20±5C. With a background < 1-3 x 10-4 cts cm-2s-1keV-1, the HXI has 100x the sensitivity of the Suzaku Hard X-ray Detector.
Soft Gamma-ray Detector (SGD) The SGD is a non-focusing hard X-ray detector with a 50-600 keV energy range and sensitivity at 100 keV, about 10 times bet\ ter than the Suzaku HXD.

 

On March 27, 2016, JAXA lost contact with the satellite and on April 28 announced to cease the efforts to restore the mission operations. Hitomi collected about one month worth of data with its instruments. The timeline of the observations are listed in the following table :

Mission Timeline

|name                   |obsid    |ra         |dec        |time                   |exposure   |sxs |sxi |hxi1|hxi2|sgd1|sgd2|
|MNV_small              |000002010|04 02 55.55|+21 43 00.8|2016-02-23 03:50:08.519| 1108.51263|YI  |NN  |NN  |NN  |NN  |NN  |
|MNV_middle             |000003010|03 43 35.33|+41 17 46.5|2016-02-23 05:34:06.880|39360.16026|YI  |NN  |NN  |NN  |NN  |NN  |
|Perseus_core           |100040010|03 19 29.79|+41 29 01.9|2016-02-24 02:11:37.825|48723.99476|YY  |NN  |NN  |NN  |NN  |NN  |
|Perseus_core_adjustment|100040020|03 19 43.59|+41 31 09.8|2016-02-25 02:13:12.618|97441.42291|YY  |NN  |NN  |NN  |NN  |NN  |
|Sunangle_0_for_EOB_ext |000004010|04 42 50.24|-01 31 19.3|2016-02-27 00:33:32.172|48960.44190|YI  |NN  |NN  |NN  |NN  |NN  |
|Sunangle_0_for_EOB_ext |000004021|04 42 51.42|-01 31 45.8|2016-02-28 04:39:40.603|44218.71750|YI  |NN  |NN  |NN  |NN  |NN  |
|Sunangle_0_for_EOB_ext |000004022|04 42 51.84|-01 31 45.6|2016-02-29 04:00:01.081|45561.47646|YI  |NN  |NN  |NN  |NN  |NN  |
|Sunangle_0_for_EOB_ext |000004023|04 42 51.83|-01 31 45.3|2016-03-01 04:00:01.081|44792.31621|YI  |NN  |NN  |NN  |NN  |NN  |
|Sunangle_0_for_EOB_ext |000004030|04 42 51.83|-01 31 44.4|2016-03-02 04:00:45.080|82248.42188|YI  |NN  |NN  |NN  |NN  |NN  |
|CO_3deg                |000005010|04 38 32.61|+01 17 00.4|2016-03-03 22:54:13.080| 2113.00000|YI  |NN  |NN  |NN  |NN  |NN  |
|CO_3deg                |000005020|04 38 35.04|+01 17 37.1|2016-03-04 00:34:26.139|  103.65593|YI  |NN  |NN  |NN  |NN  |NN  |
|Perseus                |100040030|03 19 43.78|+41 31 12.5|2016-03-04 00:41:13.080|72511.57813|YY  |NN  |NN  |NN  |NN  |NN  |
|Perseus                |100040040|03 19 43.71|+41 31 11.5|2016-03-05 12:00:00.231|68133.51563|YY  |NN  |NN  |NN  |NN  |NN  |
|Perseus                |100040050|03 19 43.74|+41 31 17.3|2016-03-06 19:36:45.080| 5451.23438|YY  |NN  |NN  |NN  |NN  |NN  |
|Perseus_adjustment     |100040060|03 19 48.25|+41 30 44.1|2016-03-07 00:37:56.037|45793.67852|YY  |YY  |NN  |NN  |NN  |NN  |
|CO_10                  |000006010|16 54 40.72|-45 24 10.3|2016-03-07 20:22:14.037| 2137.23438|YI  |YI  |NN  |NN  |NN  |NN  |
|CO_11                  |000006020|04 54 33.46|+45 11 59.7|2016-03-07 22:05:42.037| 3262.23438|YI  |YI  |NN  |NN  |NN  |NN  |
|N132D                  |100041010|05 24 59.00|-69 38 46.4|2016-03-08 01:29:21.037| 2610.00000|YP  |YD  |NN  |NN  |NN  |NN  |
|N132D                  |100041020|05 25 52.90|-69 36 52.2|2016-03-08 21:21:29.898|62617.75003|YN  |YD  |WI  |NN  |NN  |NN  |
|IGR_J16318-4848        |100042010|16 30 50.48|-48 49 54.6|2016-03-11 21:18:24.210|73415.23438|YN  |YD  |WI  |NN  |NN  |NN  |
|IGR_J16318-4848        |100042020|16 30 50.51|-48 49 55.7|2016-03-11 21:24:11.770|68226.13228|YN  |YD  |YN  |WI  |NN  |NN  |
|IGR_J16318-4848        |100042030|16 30 48.27|-48 49 54.3|2016-03-12 19:36:58.092|40231.51563|YN  |YD  |YN  |WI  |NN  |NN  |
|IGR_J16318-4848        |100042040|16 31 18.55|-48 49 38.0|2016-03-13 17:56:03.164|68022.73438|YN  |YD  |YP  |WI  |NN  |NN  |
|None2                  |000007010|05 28 11.08|-30 23 30.2|2016-03-14 16:48:39.175| 2077.00000|YI  |YI  |YI  |WI  |NN  |NN  |
|None2                  |000007020|05 29 25.07|-30 22 12.3|2016-03-14 18:00:22.294|26221.76563|YI  |YI  |YI  |YI  |NN  |NN  |
|IRU-CO-N1              |000008010|05 57 20.05|+16 01 09.6|2016-03-15 18:17:12.766| 2335.00000|YI  |YI  |YI  |YI  |NN  |NN  |
|IRU-CO-N2              |000008020|18 16 42.93|+27 48 55.4|2016-03-15 20:14:56.755|  597.23244|YI  |YI  |YI  |YI  |NN  |NN  |
|IRU-CO-N3              |000008030|16 01 00.99|-57 19 14.2|2016-03-15 21:53:21.782| 1000.19234|YI  |YI  |YI  |YI  |NN  |NN  |
|IRU-CO-N4              |000008040|03 58 23.47|+57 04 53.7|2016-03-15 23:41:53.748|46103.21878|YI  |YI  |YI  |YI  |NN  |NN  |
|IRU-CO-N5              |000008050|11 33 51.75|-81 13 00.9|2016-03-16 15:15:15.773| 2075.23438|YI  |YI  |YI  |YI  |NN  |NN  |
|IRU-CO-N6              |000008060|17 13 50.99|+10 30 41.4|2016-03-16 16:50:25.745| 5045.03873|YI  |YI  |YI  |YI  |WI  |NN  |
|RXJ1856.5-3754         |100043010|18 56 34.61|-37 54 33.1|2016-03-16 19:59:18.736|40818.00000|YY  |YY  |YY  |YY  |WI  |NN  |
|RXJ1856.5-3754         |100043020|18 56 34.89|-37 54 33.6|2016-03-17 19:40:05.246|39522.95531|YY  |YY  |YY  |YY  |WI  |NN  |
|RXJ1856.5-3754         |100043030|18 56 34.88|-37 54 33.7|2016-03-18 16:20:00.163|46778.59134|YY  |YY  |YY  |YY  |WI  |NN  |
|RXJ1856.5-3754         |100043040|18 56 34.74|-37 54 33.1|2016-03-19 14:39:00.204| 4701.07812|YY  |YY  |YY  |YY  |WI  |NN  |
|G21.5-0.9              |100050010|18 33 33.06|-10 34 07.5|2016-03-19 17:20:04.847|41314.98440|YY  |YY  |YY  |YY  |WI  |NN  |
|G21.5-0.9              |100050020|18 33 32.94|-10 34 07.6|2016-03-20 14:38:55.788|52536.07813|YY  |YY  |YY  |YY  |YY  |NN  |
|G21.5-0.9              |100050030|18 33 33.04|-10 34 07.5|2016-03-21 17:00:00.771|40838.50003|YY  |YY  |YY  |YY  |YY  |WI  |
|G21.5-0.9              |100050040|18 33 32.93|-10 34 07.0|2016-03-22 17:00:05.252|29984.07813|YY  |YY  |YY  |YY  |YY  |YY  |
|RXJ1856.5-3754         |100043050|18 56 34.75|-37 54 34.3|2016-03-23 13:56:03.869|40973.98440|YY  |YY  |YY  |YY  |YY  |YY  |
|RXJ1856.5-3754         |100043060|18 56 34.77|-37 54 34.0|2016-03-24 11:22:57.202|44981.00000|YY  |YY  |YY  |YY  |YY  |YY  |
|Crab                   |100044010|05 34 32.02|+22 00 47.7|2016-03-25 12:16:44.298| 9735.23438|YY  |YY  |YY  |YY  |YY  |YY  |