To All BACODINE Sites: 25 Feb 95 Attached below is the 2nd in a series of a new capability of BACODINE. BACODINE is distributing the GRB localizations determined by the Interplanetary Network (IPN). Kevin Hurley is the PI for the IPN operation. I have implimented the suggestions people made on the first BACO/IPN notice. Please feel free to continue to make comments/suggestions about the format and content. I am leaving the explanation section below in the first few notices until people get used to what's going on. Since IPN localizations depend on the Ulysses spacecraft (and the GRO-BATSE instrument), the time delays between the GRB and these notices will be in the 1 to 3 day time range (when we eventually get all the procedures down). Clearly, this is much different than the "few seconds" delays of the BATSE-only BACODINE notices, but the idea is to provide a more global service within the BACODINE network of sites and operations. This service will allow for a more speedy analysis of the appropriate sub-region in observations made by wide FOV instruments. Also, the already existing BACODINE distribution network will allow for more timely follow-up observations by instruments that have small FOVs (comparable to IPN arc segments). And in late '96, the IPN network be able to produce small boxes, instead of annuli or annuli segments, when the Russian Mars 96 spacecraft comes online. The format of the BACODINE/IPN notices will be: (1) A header of the pertinant numbers (BACODINE email notice style) suitable for easy parsing by programs. The BACODINE and HUNTSVILLE locations of the GRB are given along with the angular distance between the two. The Huntsville location is preliminary and may differ slightly from the "final" location that will appear in the BATSE catalog. The position of the Sun & Moon are given plus their separations from the BACODINE location as a reference for optical observers. There are four fields for the IPN annulus: the RA & Dec of the center of the annulus, the radius of it, and the total width of the annulus. (2) Some comments describing the status/accuracy of this localization and any particular or noteworthy comments on that specific burst. (3) The arc segment in RA,Dec tabular form. The location along the arc segment that has the maximum probablilty of the GRB location is marked. This is not a rigorous quantitative determination, but a determination made by a human folding in the locations and sizes of the sizes of the BACODINE and HUNTSVILLE error circles. While every effort will be made to choose this location correctly, it should be used by observers only as a guide in making their follow-up observations. Eventually, I would like to be able to mark the table with plus and minus 3 sigma points which can also be used as a guide. Down the road, it may be possible to distribute all of this location information in graphical form via postscript files (or similar). Scott Barthelmy NASA-GSFC, Code 661, Greenbelt, MD 20771 PHONE: 301-286-3106 (work) FAX: 301-286-1684 (1st choice, -1682 2nd choice) EMAIL: scott@xtelab.gsfc.nasa.gov PAGER: 1-800-SKY-PAGE, PIN 2618712 (by phone) PAGER: 2618712@skymail.com (by email, 240 characters max per message) /////////////////////////////////////////////////////////////////////////////// TITLE: IPN/BACODINE/HUNTSVILLE LOCALIZATION TRIGGER_NUM: 3408 DATE_TIME: 95/02/08 02:10:24 UT BACO_RA: 337.95d {+22h 31m 49s} (J2000) BACO_DEC: +52.63d {+52d 38' 01"} HUNT_RA: 337.06d {+22h 28m 15s} (J2000) HUNT_DEC: +54.19d {+54d 11' 34"} B_H_DELTA: 1.64 [deg] SUN_POSTN: 321.26d {+21h 25m 03s} -15.18d {-15d 10' 45"} (Current) SUN_B_DIST: 69.29 [deg] MOON_POSTN: 52.79d {+03h 31m 09s} +17.68d {+17d 40' 44"} (Current) MOON_B_DIST: 66.91 [deg] ANNULUS_RA: 334.7147d {+22h 07m 14s} (J2000) ANNULUS_DEC: -27.0122d {-27d 00' 44"} ANNULUS_RADIUS: 83.397 [deg] ANNULUS_WIDTH: 0.044 [deg] (Total width) This IPN localization is preliminary. The "total width" of the annulus was selected to include all known uncertainties and systematics. The final analysis will reduce this width. All follow-up queries should be addressed to Kevin Hurley (UC Berkeley, khurley@sunspot.ssl.berkeley.edu). This IPN annulus is tabulated below along the segment that intersects a combination of the BACODINE and Huntsville error circles. The position of maximum probability is marked. RA DEC (J2000) 327.487 56.157 328.201 56.200 328.917 56.239 329.635 56.273 330.354 56.302 331.073 56.327 331.794 56.348 332.515 56.364 333.237 56.375 333.960 56.382 334.682 56.385 335.405 56.383 336.127 56.376 336.849 56.365 337.570 56.349 338.291 56.329 <=== Max probability 339.011 56.305 339.730 56.276 340.448 56.242 341.164 56.204 341.878 56.161 342.591 56.114 343.302 56.063 344.011 56.007 344.718 55.947 345.423 55.883 346.124 55.814 346.824 55.741 347.520 55.663 348.214 55.582 348.904 55.496 --------------------------- THE END ---------------------------