Srb sxs 2014
Gamma rays are more energetic still than hard x-rays.
Mounted on either side of the spacecraft, these sensors will be able to detect gamma ray sources emitting radiation with energies of between 60 and 600 ke V.
For Wednesday’s launch, ASTRO-H was joined by three small satellites; Horyu-4 and Chubu Sat 2 and 3.
The 2,700-kilogram (6,000 lb) satellite is equipped with four telescopes and six detectors, allowing it to study both “hard” and “soft” x-rays and gamma rays.
An x-ray is electromagnetic radiation with an energy of between 0.1 and 100 kiloelectronvolts (ke V); between ultraviolet radiation and gamma rays in the electromagnetic spectrum.
The 202 configuration uses two SRB-A motors, the 204 uses four, while the 20 configurations used two SRB-A and two or four Castor-4AXL motors.
Both the first and seconds stages are cryogenically-fuelled, burning liquid hydrogen oxidised by liquid oxygen.The H-IIA first flew in August 2002; a replacement for the earlier H-II vehicle which had proven more expensive to operate and less reliable than had been hoped.
Carrying a suite of instruments dedicated to observing x-rays, ASTRO-H is expected to operate in low Earth orbit for three years.The four telescopes include two Soft X-ray Telescopes; SXT-I and SXT-S.SXT-I focusses x-rays onto the Soft X-ray Imager (SXI), while SXT-S collects incident rays for the Soft X-ray Spectrometer (SXS).ASTRO-H launched atop Mitsubishi Heavy Industries’ H-IIA carrier rocket, which was making its thirtieth flight.Flying in its lightest configuration, the H-IIA 202, the rocket consists of two stages with a pair of SRB-A3 solid rocket motors augmenting the first stage at liftoff.Astrophysicists term the most energetic x-rays as hard x-rays, typically ones with energies above 10 ke V, while less energetic x-rays are termed “soft”.