say stuff here.
MISSION | Type Num | PERODIC DISRTIBUTIONS | STILL AVAILABLE? |
---|---|---|---|
BATSE | 2 | 3.33 hr | yes |
HETE | 44 | 3.50 hr | yes |
Swift-BAT | 82 | 3.55 hr | yes |
INTEGRAL | 51-55 | 6.00 hr | yes |
AGILE | 109 | 3.56 hr | yes |
Fermi-GBM | 119 | 3.57 hr | yes |
Fermi-LAT | 124 | 3.57 hr | yes |
Original Test Notices:
Sites can elect to receive (by their normal distribution method)
Test Coordinate Notices (type=2). These are identical in format and content
to the normal BATSE-derived GRB Notices (types=1,11,22,24),
except they are generated by the GCN program
(i.e. they do not originate from any GRB detector instrument).
They are chosen from a predefined list (see the table below)
to more-or-less uniformly sample the sky.
The program cycles through the list, sending
a different location every 3.3 hours. Sites can elect to receive (or not)
these type=2 Test Notices on a site-by-site basis.
These are still available even though the CGRO-BATSE mission is gone.
Index RA Dec (J2000) 1 0.0, 35.0 2 36.0, 35.0 3 72.0, 35.0 4 108.0, 35.0 5 144.0, 35.0 6 180.0, 35.0 7 216.0, 35.0 8 252.0, 35.0 9 288.0, 35.0 10 324.0, 35.0 11 0.0, -35.0 12 36.0, -35.0 13 72.0, -35.0 14 108.0, -35.0 15 144.0, -35.0 16 180.0, -35.0 17 216.0, -35.0 18 252.0, -35.0 19 288.0, -35.0 20 324.0, -35.0
Bradford Test Notices: (No longer available)
As yet another example of how flexible the GCN system is in accomodating the needs of the follow-up observation community, GCN generates a separate stream of test coordinate locations (type=21) to the BRADFORD telescope. The location varies according to the month-of-year and the time-of-day is fixed.
HETE Test Notices:
Sites can elect to receive (by their normal distribution method) HETE Test Coordinate Notices (type=44). These are identical in format and content to the normal HETE-derived GRB Notices (types=40-43), except they are generated by the GCN program (i.e. they do not originate from any GRB detector instrument). They are chosen from a predefined list (the same table as the Original Test Notices above) to more-or-less uniformly sample the sky. The program cycles through the list, sending a different location every 3.50 hours. Sites can elect to receive (or not) these type=44 HETE_Test Notices on a site-by-site basis.
INTEGRAL Test Notices:
Sites can elect to receive (by their normal distribution method) INTEGRAL Test Coordinate Notices (types=51-55). The way the INTEGRAL Test notices work is somewhat different than the other mission-based test notices. The differences are: (a) the Test notices come from the INTEGRAL ground operations (not GCN internal), and (b) all 5 notice types have a "test" form (instead of a separate test-type). These are identical in format and content to the normal INTEGRAL Notices (types=51-55) except they have a flag bit set indicating they are a test-form and not the real-time burst-caused form. They values in the notices are choosen by the INTEGRAL Operations team. They come every 6 hours. Sites can elect to receive (or not) these INTEGRAL_Test Notices on a site-by-site basis.
Swift Test Notices:
Sites can elect to receive (by their normal distribution method) Swift Test Coordinate Notices (type=82). These are identical in format and content to the normal Swift_BAT_GRB_Position Notice (types=61), except they are generated by the GCN program (i.e. they do not originate from the Swift-BAT instrument). They are chosen from a predefined list (the same table as the Original Test Notices above) to more-or-less uniformly sample the sky. The program cycles through the list, sending a different location every 3.54 hours. Sites can elect to receive (or not) these type=82 Swift_Test Notices on a site-by-site basis.
AGILE Test Notices:
Ditto the description for the Swift Test Notices, except that these are Type=109.
Fermi Test Notices:
Ditto the description for the Swift Test Notices, except that these come in two forms GBM_test (type=119) and LAT_Test (type=124).
Pager Test Notices: (no longer available)
Pager sites can also elect to receive a test page notice at a specific time of day at some modulo-day occurance rate (e.g. 2:00pm local time every 3rd day). This allows the site to monitor their reception efficiency and aliveness if they so choose.