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    New GRB 02/23/10

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    mountaingirl/NM

    Posts : 58
    Join date : 2010-02-17

    New GRB 02/23/10

    Post  mountaingirl/NM on Wed 24 Feb 2010, 5:08 pm

    http://lheawww.gsfc.nasa.gov/docs/gamcosray/legr/bacodine/gcn3/10448.gcn3

    TITLE: GCN CIRCULAR
    NUMBER: 10448
    SUBJECT: GRB 100223A: Fermi GBM detection
    DATE: 10/02/24 03:27:41 GMT
    FROM: Sylvain Guiriec at UAH <sylvain.guiriec@lpta.in2p3.fr>

    Colleen Wilson-Hodge (NASA) and Sylvain Guiriec (UAH)
    report on behalf of the Fermi GBM Team:

    "At 02:38:09.31 UT on 23 February 2010, the Fermi Gamma-Ray Burst Monitor
    triggered and located GRB 100223A (trigger 288585491 / 100223110).

    The on-ground calculated location, using the GBM trigger
    data, is RA = 104.1, DEC = +2.8 (J2000 degrees,
    equivalent to 6 h 56 m, 2 d 48 '), with an uncertainty
    of 3.6 degrees (radius, 1-sigma containment,
    statistical only; there is additionally a systematic
    error which is currently estimated to be 2 to 3 degrees).

    The angle from the Fermi LAT boresight is 76 degrees.

    GBM triggered on a soft peak lasting about 0.05 s followed few ms later by
    a longer and harder one. The T90 duration is about 0.206 s (50-300 keV).
    The time-averaged spectrum from T0-0.01 s to T0+0.22 s is
    adequately fit by a power law function with an exponential
    high energy cutoff. The power law index is -0.31 +/- 0.08 and
    the cutoff energy, parameterized as Epeak, is 1143 +/- 109 keV
    (Castor C-stat 570.83 for 605 d.o.f.).

    The event fluence (10-1000 keV) in this time interval is
    (1.42 +/- 0.04)E-06 erg/cm^2. The 1-sec peak photon flux measured
    starting from T0-0.01 s in the 10-1000 keV band
    is 12.5 +/- 0.4 ph/s/cm^2.

    The spectral analysis results presented above are preliminary;
    final results will be published in the GBM GRB Catalog
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    Nightmoves

    Posts : 116
    Join date : 2010-02-17
    Age : 66
    Location : Chatsworth, CA

    Re: New GRB 02/23/10

    Post  Nightmoves on Wed 24 Feb 2010, 5:19 pm

    MG - I have a couple of questions for you and others that usually post on Skywatchers? In all the time you have been sky watching have you ever seen a spiral aurora before? If so, is it a common type aurora? study

    The other question is, In order to get an aurora to be seen all over the planet, what would the conditions need to be involving the sun? I tried Googling this last night but couldn't find what I wanted. I guess I am not wording the question right for Google. lol!

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