[Aavso-sid-list] SGR burst times

[arne]

Here is the latest GCN circular, which gives the burst times
from the new SGR.  I mentioned this a couple of weeks ago,
but forgot that you can't attach anything to posts.  Look through
your logs and see if you have SID matches with any of these
dates and times.  If we have more than one observer matching
on a given burst, then it stands a chance of being a real detection.
Thanks, folks!
Arne
-----------------------
TITLE:   GCN CIRCULAR
NUMBER:  8915
SUBJECT: SGR J1550-5418
DATE:    09/02/26 00:34:30 GMT
FROM:    Chryssa Kouveliotou at MSFC  <chryssa.kouveliotou at nasa.gov>

SGR J1550-5418 (former AXP 1E 1547.0-5408): list of triggers from the Fermi 
Gamma-ray Burst Monitor (GBM)

C. Kouveliotou (NASA-MSFC), A. von Kienlin (MPE), G. Fishman (NASA-MSFC),  V. 
Connaughton (UAH), A. van der Horst (NASA-MSFC/ORAU), and N. Bhat (UAH), report 
on behalf of the Fermi GBM Team:

During the current active period of SGR J1550-5418 which began on 22 January 
2009 (GCNs 8833, 8835), the Fermi Gamma-ray Burst Monitor (GBM) has triggered on 
117 discrete bursts through 24 February, of which 15 were extremely intense. 
Additionally, a multitude of untriggered events have also been recorded over the 
same period.  The source is still active, but with a decreased rate of triggers 
to ~twice per day, with exceptionally intense bursts occurring about once per 
week.  A list of all Fermi GBM triggers from SGR J1550-5418 in the time interval 
above, with the particularly intense events noted by an asterisk, is given at: 
http://gammaray.nsstc.nasa.gov/gbm/science/magnetars. NOTE: our trigger times 
are not necessarily the same as event peak times, depending on the event 
durations, which range from milliseconds to 1-2 sec.

Many of the intense bursts from SGR J1550-5418 are expected to produce 
measurable ionospheric disturbances, as recorded by observations of VLF radio 
propagation (GCNs 8881, 8900).  Observations of these disturbances over 
different elevation angles could provide unique insight into the low energy (<2 
keV) emission from this SGR during bursts, as well as the total ionizing X-ray 
fluence deposited in the upper atmosphere.  Correlations of these outbursts with 
data from detectors on other spacecraft are also encouraged.  Analyses of the 
duration, peak fluxes, fluences and spectral characteristics of these events 
from GBM data are in progress.

Finally, we would like to stress that the source bursting behavior clearly 
classifies it as a Soft Gamma Repeater, contrary to the initial classification 
as an Anomalous X-ray Pulsar (AXP) by Camilo et al. (2007, ApJL 666, 93), who 
only used the persistent source spectrum and pulsation period for a tentative 
classification. Similar to the Swift team (GCN 8901) therefore, we will call the 
source out as SGR J1550-5418 in the future.