Monitor of All sky Xray Image MAXI 1

Monitor of All sky X-ray Image ; MAXI 1 Isobe Naoki (isobe@crab. riken. jp) and the MAXI team 1, 2, 3, 4, 5, 6 1 RIKEN, 2 JAXA, 3 Osaka Univ. , 4 Aoyama Gakuin Univ. , 5 Tokyo Tech. Univ. , 6 Nihon Univ. Web : http: //www-maxi. tksc. jaxa. jp Ø 1. What is MAXI ? Ø 2. Instruments on MAXI ISS u. All sky X-ray monitor on the Japanese Experiment Module (JEM) Exposed Facility of the International Space Station (ISS) u. Scan of all most all over the sky every 96 minutes u. Launch : 2008 by the Space shuttle u. Mission life : at least 2 years A concept of slit camera Field of view of MAXI Zenith Fo. V X-ray source 1 X-ray source 2 Celestial sphere ISS motion Earth Slit Collimators JEM Forward Fo. V 1 -d Position sensitive detector ISS Solid-state Slit Camera (SSC) Gas Slit Camera (GSC) u. MAXI has two instruments; Gas Slit Camera (GSC) and Solid-state Slit Camera (SSC) u. These instruments consist of slits, slat collimators, and 1 -dimensional position sensitive X-ray detectors. u. Their combination defies a narrow rectangular field of view (Fo. V) in the sky. u. Both instruments are set up in the zenith and forward direction, in order to compensate non-operational periods (e. g. South Atlantic Anomaly). Pressurized Vessel MAXI Exposed Facility Ø 3. Science with MAXI X-ray flux of known sources X-ray flux (m. Crab) ＊Galactic source ＋ AGNs ○ Clusters of galaxies (taken from Uhuru and HEAO-1 catalog) Sensitivity of Previous all sky X-ray monitors ～ 20 m. Crab (RXTE AXM) GSC Detector 10 m. Crab / 1 orbit (96 min. ) 3 m. Crab / 1 day 1 m. Crab / 1 week Energy Effective Area Field of View Energy Resolution Position Accuracy Sensitivity of MAXI Distance (light year) MAXI detects more than 1000 X-ray sources, especially active galactic nuclei (AGNs) SSC Proportional counter (Xe + CO 2 gas) 2 – 30 ke. V 5350 cm 2 1. 5 x 160 degree 18 % at Mo-Ka 0. 1 degree 236 mm Cts/sec ISS NASA Link JAXA Link 2 week Data flow of MAXI u 50 -70% of MAXI date is sent to ground in real time (NASA Link). u. All the data will become accessible through the Internet. u. MAXI alerts transients through the Internet in a few minutes JAXA MAXI Data relay satellite MAXI members (Sep. 2003) 0. 5 – 10 ke. V 200 cm 2 1. 5 x 90 degree 140 e. V 0. 1 degree A unit of GSC Be window (100 mm thick) 358 mm Simulated all sky X-ray images, to be obtained with MAXI NASA MSFC X-ray CCD ü 2. 1 Gas Slit Camera (GSC) A proportional counter u. Dynamic Catalog of X-ray sources u. Long-term variability of AGNs u. Alert of X-ray transients A Simulated lightcurve u. Complete lightcurve of X-ray novae of a seyfert galaxy, MCG 6 -30 -15 ug-ray bursts and their afterglow Day u. Distribution of distant AGNs (measurement of X-ray BGD) u. Survey of emission lines from our Galaxy (with SSC) u. Discovery of new kinds of X-ray objects 1 day Scan MAXI Slit and collimator u. Three units forward, and three units for Zenith Fo. V u. Wide Fo. V : 1. 5 x 160 degree u. Carbon fiber anode (10 mm) ⇒Good position resolution (1 mm) u. Large Effective Area (5350 cm 2) ⇒High Sensitivity (1 m. Crab/week) Slit Collimator (A picture from the counter side) ü 2. 2 Solid-state Slit Camera (SSC) A unit of SSC (without slit and collimator) Quick follow up observations !! SSC spectra of emission lines Al-Ka 1. 4876 Ti-Ka Cl-Ka 4. 51084 2. 62239 Cl-Kb 2. 8156 V-Ka 4. 95220 V-Kb 5. 42729 Zn-Ka 8. 63886 Fe-Ka 6. 4038 Ni-Ka 7. 47815 Fe-Kb 7. 05798 Ni-Kb 8. 26466 Zn-Kb 9. 5720 If you have any interest in MAXI mission leader Please contact me or the mission leader Naoki Isobe (me) (Dr. M. Matsuoka; matsuoka. masaru@jaxa. jp) CCD Chip (Hamamatsu Photonics) 24 mm u. One unit forward, one unit for zenith u. Good Energy Resolution : ～ 150 e. V (at Mn Ka)