ASM Report on BATSE trigger number 8098 of type GRB Coords

Trigger time: UT 000509 19:10:50

Summary of ASM Results

To the right is a series of questions about the ASM's response to a BASTE alert. The backgrounds behind the answers are color-coded for speed. If you see all green backgrounds, then there is a very good chance that this Gamma-Ray Burst was localized by the ASM. The presence of red or yellow backgrounds indicate that there are good reasons to be cautious.
For a deeper analysis of the response to this alert see the data below.
GARRETT JERNIGAN's skymap
(Your browser must be configured to read FITS files to see his maps) You might want to check his map against known sources, either below or in the ASM catalog.
NoDoes the ASM have error boxes?
NoDo they overlap?
NoEach other? (Any cross pair)
NoThe BATSE circle with radius 4.5°? (Any ASM box)
NoneQuality of chi2?
NoneQuality of signal to noise ratio?
NoneShortest delay (in seconds) from the BATSE Trigger to the start of an ASM observation with an error box?
NoDoes an ASM dwell show short-term variablity when the BATSE circle is in the FOV shortly after the trigger time?
----Is the FOV free of catalogued bright or variable sources?

ASM Map

No ASM Map was generated because there are no ASM Error Boxes

BATSE Map

(15° from center of circle with all known sources)

The BATSE circle has a radius of 4.5°

ASM Dwells with Error Boxes within 1000 s of BATSE Trigger
Type Dwell Sequence Dwell # SSC # (0-2) Reduced chi2 RA of center of box Dec of center of box Av. Intensity Av. Int. Error S/N
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Multiple Time-Series Data

More on the ASM map:

The ASM map is centered on the ASM error box whose center is closest to the center of the BATSE circle. The size of the map is scaled by the size of this error box. The BATSE circle will also be plotted on this map, unless it falls beyond the range considered. (See the BATSE map.) Known X-ray sources from the full ASM catalog are also plotted as diamonds, with labels to the right.

More on the BATSE map:

The BATSE map has a fixed scale of 15° in either direction from the center of the BATSE circle. Both the BATSE circle (dashed line) and any ASM error boxes (solid lines) will be plotted here, although it is possible that they all lie outside the boundaries of this 30° region. Known X-ray sources from the full ASM catalog are also plotted as diamonds, with labels to the right.

What's interesting in the Error Box Table:

There are two types of localizations that may appear in the Error Box Table (As identified in Column 1):
  1. Error boxes generated from analyzing the specific dwells in which the FOV overlaps the BATSE error circle within 1000 s from the trigger time.
  2. Error boxes that are separated by no more than 3-sigma from the BATSE circle, generated by the standard analysis from any observation within 1000 s of the BATSE trigger.
Type 2 boxes are included for consideration, because the actual location of the GRB (especially in a the case of a MAX BC alert) may lie outside the BATSE circle, so we cannot use the radius of the BATSE circle as an absolute cut-off value. Unrelated or spurious error boxes may therefore show up here, and for this reason Type 1 error boxes should be given higher priority than Type 2 error boxes.

Type 2 error boxes are only included if they are within a certain radius from the BATSE location. That radius is a minimum of 15°, and a maximum of 90°. Intermediate values are set by multiplying the BATSE error radius by three.

To identify GRBs, consider the following:

What's interesting in the Time-Series Data:

For every dwell when the FOV overlaps the BATSE circle, and an error box is generated, a plot of the three-energy-band time-series data will be included in this web page. If there are no dwells that meet both these criteria, time-series data for all dwells that intersect the ASM FOV within 1000 s from the BATSE trigger time will be plotted. If there are no such dwells, no time-series data will be included here.

The count rates are displayed in 1-s bins, and the X-axis is labelled in seconds from the BATSE trigger time.

To identify GRBs:

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This web page is designed to help you easily evaluate the ASM's response to a GRB alert from BATSE. Please direct any suggestions you might have to make this page easier to understand to Don Smith.
This page brought to you by Don Smith and Graham Dower