GCN Test Coordinates

INTRODUCTION:

say stuff here.

TABLE 1: Missions with Test Position Notices
MISSIONType NumPERODIC DISRTIBUTIONSSTILL AVAILABLE?
BATSE23.33 hryes
HETE443.50 hryes
Swift-BAT823.55 hryes
INTEGRAL51-556.00 hryes
AGILE1093.56 hryes
Fermi-GBM1193.57 hryes
Fermi-LAT1243.57 hryes

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.


Return to GCN (BACODINE) homepage.
This file was last modified on 07-Sep-08.