Editing Rossi X-ray Timing Explorer (section)

=== All-Sky Monitor (ASM) ===
The All-Sky Monitor (ASM) provided all-sky X-ray coverage, to a sensitivity of a few percent of the [[Crab Nebula]] intensity in one day, in order to provide both flare alarms and long-term intensity records of celestial X-ray sources.<ref name="Experiment1">{{cite web |url=https://nssdc.gsfc.nasa.gov/nmc/experiment/display.action?id=1995-074A-01 |title=Experiment: All-Sky Monitor (ASM) |publisher=NASA |date=28 October 2021 |access-date=28 November 2021}} {{PD-notice}}</ref> The ASM consisted of three wide-angle shadow cameras equipped with proportional counters with a total collecting area of {{cvt|90|cm2}}. The instrumental properties were:<ref>{{cite web |url=http://heasarc.gsfc.nasa.gov/docs/xte/ASM.html |title=All-Sky Monitor (ASM) |publisher=Heasarc.gsfc.nasa.gov |date=2002-02-04 |access-date=2012-02-03}} {{PD-notice}}</ref><ref name="ASM">{{cite web |url=https://heasarc.gsfc.nasa.gov/docs/xte/asm_products_guide.html |title=The RXTE All Sky Monitor Data Products |publisher=NASA |date=26 August 1997 |access-date=28 November 2021}} {{PD-notice}}</ref>

* Energy range: 2–12-keV;
* Time resolution: observes 80% of the sky every 90 minutes;
* Spatial resolution: 3' × 15';
* Number of shadow cameras: 3, each with 6° × 90° FoV;
* Collecting area: {{cvt|90|cm2}};
* Detector: [[Xenon]] proportional counter, position-sensitive;
* Sensitivity: 30 [[Crab (unit)|mCrab]].

It was built by the CSR at [[Massachusetts Institute of Technology]]. The [[principal investigator]] was [http://web.mit.edu/physics/people/faculty/bradt_hale.html Dr. Hale Bradt].