[Aavso-sid-list] new SGR bursts

[David Saum]

Arne

I may have a very weak detection at 22:39:15.75 UT.

On the other hand, it may be a noise spike at
just the right time.

See my plots at

http://www.flickr.com/photos/36691357@N05/

My SID-GRB receiver is located near Washington, DC at lat 38.8453 lon
-77.1157 and it is tuned to the Cutler Maine 24 kHz transmitter. The 16
bit adc data is sampled at 4.64 samples per second and the time base is
kept accurate to 20 ms by 10 minute time updates using AboutTime. The data
was logged by the seismic software Amaseis.

I am sampling faster than most SID receivers in order to detect
shorter events.

Thanks for your updates,

David Saum
www.infiltec.com/SID-GRB at home


arne wrote:
> You might check your logs against these two new bursts, and
> against any of the other triggers listed in the accompanying
> URL.  Jerry Fishman of NASA would be very interested if our
> SID observers detected a disturbance arising from any SGR/GRB.
> In general, we would need two observers so that any event
> is confirmed.  Thanks, folks!
> Arne
> ------------------
> TITLE:   GCN CIRCULAR
> NUMBER:  9025
> SUBJECT: SGR J1550-5418: two Fermi GBM triggers on March 22
> DATE:    09/03/24 04:34:35 GMT
> FROM:    Alexander van der Horst at NASA/MSFC
> <Alexander.J.VanDerHorst at nasa.gov>
>
> A.J. van der Horst (NASA/MSFC/ORAU) and C. Kouveliotou (NASA/MSFC)
> report on behalf of the Fermi GBM team:
>
> "The Fermi Gamma-Ray Burst Monitor (GBM) has triggered on two bursts from
> SGR J1550-5418 on March 22. The first occurred at 18:56:23.75 (trigger
> 259440985 / 090322789) and the second at 22:39:15.75 UT (trigger 259454357
> / 090322944). The latter burst was very bright, and also detected by
> SuperAGILE (GCN 9014). Both bursts were independently detected by INTEGRAL
> SPI-ACS.
>
> These are the first GBM triggers after the second active period of SGR
> J1550-5418 that ended on February 24, 2009. A complete list of the GBM
> triggers from this SGR can be found at:
> http://gammaray.nsstc.nasa.gov/gbm/science/magnetars."
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