[Aavso-sid-list] new SGR 0501+4516

[David Saum]

Hi Rishi

No sunspots today
http://spaceweather.com/images2008/31aug08/midi512_blank.gif

Nothing showing on GOES satellite X ray data
http://www.swpc.noaa.gov/rt_plots/xray_5m.html

Nothing showing on Moore Observatory (KY) online plot
http://moondog.astro.louisville.edu/

Could it be a nearby thunderstorm?

Dave

Rishi Patel wrote:
> Did anyone else detect an SID at around 14:42 UTC today?
> I am monitoring the station at La Moure, ND at 25.2 kHz from Wiscasset,
> ME.
>
> Thanks,
>
> On Mon, Aug 25, 2008 at 7:56 AM, arne <arne at aavso.org> wrote:
>
>> A new soft gamma-ray repeater was discovered by Swift on August 22;
>> see GCN 8112, 8113. The BAT position is
>>    RA(J2000)  =  05h 01m 04s
>>    Dec(J2000) = +45d 16' 20"
>> with an error radius of 3arcmin.
>> A later observation (ATEL 1676) using the XRT X-ray telescope onboard
>> SWIFT gives a more precise position from the SGR afterglow:
>>   RA(J2000)  = 05h 01m 6.78s
>>   Dec(J2000) = +45d 16' 34.0"
>> with an error radius of 2.6arcsec (90% containment).
>>
>> it is nicely positioned in the sky,
>> and has been bursting over a hundred times in the past few days.
>> One large flare was seen at 11:27:35UT on August 23.
>> Denis Denisenko (GCN8114) suggests that an optically variable
>> object at
>> RA (J2000.0) = 05 01 06.47
>> Dec (J2000.0) = +45 16 28.0
>> at about V=17, might be the optical counterpart, but I think the
>> jury is still out on that one - no other SGR has a bright counterpart.
>> Still, Jules Halpern monitored the variable (GCN 8129), and found
>> that it was constant at R=17.16 for the first hour and then
>> declined monotonically to R=17.35 over the next hour.
>>
>> Like previous SGRs, this one could have a super-outburst at any
>> time, and be observable by the SID group.  Right now, it would
>> be hard to correlate any particular burst with a SID event since
>> there are so many of them, but keep an eye open and report anything
>> unusual to this group.  I'll let you know if a giant pulse is
>> reported.
>> Arne
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>
>
>
> --
> Rishi
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