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Science results. N. Produit INTEGRAL science results 2 INTEGRAL is on a 3-days orbit with apogee at 150 000 km and perigee at 10 000 km. Maximizes time.

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Presentation on theme: "Science results. N. Produit INTEGRAL science results 2 INTEGRAL is on a 3-days orbit with apogee at 150 000 km and perigee at 10 000 km. Maximizes time."— Presentation transcript:

1 Science results

2 N. Produit INTEGRAL science results 2 INTEGRAL is on a 3-days orbit with apogee at km and perigee at km. Maximizes time outside the electron belts

3 N. Produit INTEGRAL science results 3 The instruments The spectrometer SPI (Ge) - 20 keV -> 8 MeV (1keV) - field of view: 16 degrees - angular resolution: 2 degrees The optical camera OMC - field of view: 5 degrees - resolution: 17.6 arcsec - up to 19.7 mag The X-ray imager JEM-X - 3 -> 35 keV - angular resolution: 1 arcmin - FCFOV 4.8(dia) degrees The imager IBIS (CdTe, CsI) - 15 keV -> 10 MeV (10keV) - resolution: 12 arcmin - FCFOV 9X9 degrees Technique of coded mask for IBIS, SPI and JEM-X

4 Exposure Map up to February 2006 maximum 10 7 sec N. Produit

5 Science with INTEGRAL Emission processes: ● Matter anti-matter annihilation ● Matter matter collision ● Black body radiation (surface of neutron stars) ● Bremsstrahlung (clusters of galaxies also a deep gravitational well) ● Synchrotron radiation (relativistic electrons in B-field) ● Compton processes (electron-photon diffusion) with either thermal electrons or relativistic electrons ● Relativstic jets that boost either process ● Nuclear line emission N. Produit

6 The variable γ ray sky N. Produit

7 7 “MAGNETAR, B ~ G Neutron star, Field re-arrangement INTEGRAL SPI/ACS von Kienlin et al. N. Produit

8 8 micro-quasar GRS D. Hannikainen et al. New type of variability N. Produit

9 keV variability map Neronov et al. Variability of galactic center less than 8% Extended emission N. Produit

10 10 Galactic center Revnivtsev et al. 2004, A&A 425, L49 ) 16-60keV ISGRI data Fe contours ASCA overplot N. Produit

11 ● INTEGRAL: PL ~ 1.8, no cut-off << 100 keV: → Initial SgrA* spectrum similar to low luminosity AGN’s 6.4 keV line is stable over ~ 10 y Compton continuum Fluorescence cut-off (Compton recoil of h.e. γ’s) Scattered radiation N H : 8x10 22 cm -2, Fe-abundance: 1.9 (x solar) M SgrB2 : 2x10 6 M  (r/10 pc) 2  Close stellar XRB transients inside cloud (~30 ly across) ruled out.  Illuminating source: Sgr A*, ± 1700 A.D.  Past luminosity (2-200 keV) ~ erg/s (10 4 of today’s value)

12 12 IGR J Shaw, Eckert et al INTEGRAL ISGRI 20-60keV Fastest accreting msec pulsar, discovered December N. Produit Radio Pulsars Millisecond Radio Pulsars Spin up by mass accretion

13 13 GX5-1, Neutron star binary system A. Paizis et al. Accretion disk and a Compton component, hard tails are not a signature of the presence of black holes. N. Produit

14 Bright unidentified sources Many unidentified sources should be HMXB Over-density in the (inner) Norma arm region High HMXB density Low HMXB density Walter et al 2005 Lutovinov et al 2005 New : -0.9 HMXB : -0.6 HMXB+new: -0.6 HMXB (XTE): -0.6 ±0.1 N. Produit14

15 15 Electron-positron annihilation, SPI map There are annihilation per second. Spectrum suggests annihilation in warm medium (7000K) Churasov et al. MNRAS 357, 1377, 2005 N. Produit

16 Big Bang Hydrogène + Helium Fe 60:~ years Al 26 :~ years Ti 44:~ 90 years Na 22:~ 4 years Co 56, 57:~ 100, 400 days Ni 56, 57:~ 8, 2 days Nucleosynthesis Some of the stellar nucleo synthesis products are observable Stars 16N. Produit

17 17 Diehl et al. Nature Al emission associated with disk population N. Produit

18 Quasar 3C Courvoisier et al., 2003, A&A 411, L343 GRS not observed N. Produit

19 19 GAMMA Ray bursts: 1 per month in the IBIS Field of view. Localisation to 2-4 arcminutes. N. Produit

20 20 Burst positions are sent automatically to the community by the IBAS system (Mereghetti et al.,2003, A&A 411, L291 Burst light curve and trigger history: N. Produit

21 Earth observation N. Produit

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23 As conclusion INTEGRAL is already in an extended mission phase A further extension until 2008 has been accepted by ESA AO4 is open you can submit observation requests! N. Produit

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