TO:  All GCN Notice recipients
RE:  Fermi will/wont Slew Notices are available
DT:  21-Jun-09
 
 
INTRO:
The Fermi spacecraft produces a message when it responds
to a newly detected burst that says if it is slewing
to the new burst or not slewing.  (Slewing, aka repointing,
puts the burst position in the middle of the LAT FOV.)
These notices are now available for public distribution.
 
 
NOTICE EXPLANATION:
This notice indicates whether or not the spacecraft will slew to the burst.
This notice contains the RA,Dec location to slew to, and a flag indicating
if the spacecraft will actually slew (or not) to this location.
These will be occur about 1-2 times per month.
Obviously, not all GBM (or LAT) detections will be slewed to.  The newly
triggered burst must pass some on-board criteria to determine slew worthiness.
And some times Automated-Repointing will be disabled (for critical planned
observations, etc).
More can be found about this notice type, and the other Fermi types, at
http://gcn.gsfc.nasa.gov/fermi.html .
This new Notice type is availalble via all the distribution methods:
socket packet, the email-based formats (full-format and the various
long, short, subject pager/cell formats), and the VOEvent XML format.
The socket packet format can be found at:
http://gcn.gsfc.nasa.gov/gcn/sock_pkt_def_doc.html .
 

EXAMPLE (full-format email):
TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Wed 17 Jun 09 05:00:19 UT
NOTICE_TYPE:     Fermi Will_Slew
RECORD_NUM:	 0
TRIGGER_NUM:     0	Sequence: 0
POINT_RA:         86.833d {+05h 47m 20s} (J2000),
                  87.024d {+05h 48m 06s} (current),
                  85.824d {+05h 43m 18s} (1950)
POINT_DEC:	 +53.017d {+53d 00' 60"} (J2000),
                 +53.019d {+53d 01' 10"} (current),
                 +52.999d {+52d 59' 56"} (1950)
POINT_DATE:	 14999 TJD;   168 DOY;   09/06/17
POINT_TIME:	 18001.68 SOD {05:00:01.68} UT
OBS_TIME:        18000.00 [sec]   (=300.0 [min]) dwell
SUN_POSTN:        85.80d {+05h 43m 13s}  +23.38d {+23d 22' 54"}
SUN_DIST:         29.65 [deg]   Sun_angle= -0.1 [hr] (East of Sun)
MOON_POSTN:        8.31d {+00h 33m 13s}   +8.97d {+08d 58' 24"}
MOON_DIST:        76.06 [deg]
MOON_ILLUM:	 37 [%]
GAL_COORDS:	 159.25, 12.50 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:	  87.81, 29.60 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi SC Slew decision.
COMMENTS:        The spacecraft accepted the repoint request.
    
    
ACTION TO YOU:
If you want to receive this new notice type, then send me email
saying so (or you can go to the website
http://gcn.gsfc.nasa.gov/gcn/config_builder.html ).


REMINDER:
1) Fermi_LAT_Update notice type was added Feb 09.
2) Fermi_Point_Dir notice type was added Feb 09.
3) Fermi_GBM notice types were added Oct 08.


Sincerely,
Scott

Scott Barthelmy                      NASA-GSFC, Code 661, Greenbelt, MD   20771
PHONE:  301-286-3106                 (office)
PHONE:  301-346-3733                 (cell)
FAX:    301-286-1684                 (1st choice,  -1682 2nd choice)
EMAIL:  scott@lheamail.gsfc.nasa.gov
PAGER:  3013463733@cingularme.com
WEB:    http://gcn.gsfc.nasa.gov/gcn