=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  List from   http://space.mit.edu/XTE/asmlc/sources.html
  Maintained by Toshiaki Takeshima, XTE Science Operation Facility
 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

ASM Light Curves Overview
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Quick-look results provided by the ASM/RXTE team.
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

Sources listed in order of increasing right ascension.
Plots show the most recent year's data (files are complete).  

This web site provides an overview of ASM results for the
convenience of users in preparing proposals and other work. The
full and official site is on the web page of the RXTE GOF at
GSFC (see link below).  That site makes available all ASM data
products, including light curves in three energy bands, details
of the solutions, and SSC pointing histories.
The ascii-formatted data available here are provided primarily
for convenience. While MIT and the GOF hope our instructions and
information are adequate for most users, we are not prepared
formally to support users of these data.  We do, however,
appreciate feedback (see bottom of page).
We ask that when results from these analyses are used, they be
referenced as "quick-look results provided by the ASM/RXTE
team."  This team includes all those working on the ASM at MIT
and at the Goddard Space Flight Center SOF/GOF.

About ASM Light Curves
Each data point represents the one-day average of the fitted
source fluxes from a number (typically 5-10) of individual ASM
dwells.  Data are taken from all three Scanning Shadow Cameras
and quoted as nominal 2-10 keV rates in ASM counts per second,
where the Crab nebula flux is about 75 ASM c/s (when at the
center of an SSC field of view, with 8 anodes operational).  The
points plotted in red are "three-sigma" detections (but read
"About the Uncertainties", below).

The ASM light curves are updated on a near-weekly basis.  The
data have been filtered to include only those points that are
less likely to give a spurious intensity; filter criteria are
summarized at the bottom of this page.  For the latest infor-
mation on the status of the instrument and analysis techniques,
please see the ASM Status Reports at the RXTE MIT Home Page
(link below).

errors
About the Uncertainties
 The error value used in plotting the one-day averages is the
 quadrature average of the estimated errors on the individual
 dwells from that day.  For sources expected to show little flux
 variation on shorter time scales, the RMS of the individual flux
 measurements (fourth column of the data files) may provide a
 better measure.

 Nor a more complete discussion of the issues involved in the
 construction of the individual error estimates, please see the
 "ASM Recent Activity" page.

The ASCII data files (click a source name) contain five columns: 

MJD of the observation
Averaged ASM unit count rate for the day (counts/second; Crab is ~75)
RMS estimated error (counts/second)
RMS deviation of the points from the one-day mean (counts/second)
Number of dwells averaged

Filter criteria are:

Reduced chi-square of the fit >1.5, except for Sco X-1 >8.0
Number of sources in the field of view >16
Earth angle >75 degrees
Exposure time >30 seconds
Long-axis angle -41.5> theta >46 degrees
Short-axis angle -5 > phi > 5 degrees

For the last two items, note that the full SSC field of view is 110 
 degrees (theta) by 12 degrees (phi).

Further Information:
=============================================================================
mailto:xtemit@space.mit.edu  : Questions or feedback about ASM

http://heasarc.gsfc.nasa.gov/docs/xte/asm_products.html
       Official ASM Data Products site at Goddard.

http://space.mit.edu/XTE/XTE.html  RXTE MIT Home Page.

http://space.mit.edu/XTE/asm_status.html#bottom
       ASM Analysis and Instrument Status.

http://space.mit.edu/XTE/xte_anno.html ASM Source Activity reports.

http://heasarc.gsfc.nasa.gov/0/docs/xte/SOF/XTESOF.html
       RXTE Science Operations Facility.

http://heasarc.gsfc.nasa.gov/0/docs/xte/xte_1st.html
       RXTE Guest Observer Facility.

http://heasarc.gsfc.nasa.gov/docs/xte/SOF/ASM_Catalog.html
       The latest ASM source catalog.
=============================================================================

Data reduced and compiled weekly by the ASM team:
Hale Bradt,
Deepto Chakrabarty,
Wei Cui,
Alan Levine,
Ed Morgan,
Ron Remillard,
Garrett
Jernigan,
Bob Shirey,
and Don Smith.
==============================================
http://space.mit.edu/~derekfox/ :  Derek Fox,
MIT Center for Space Research.
Created Sun Jun 29 20:38:12 EDT 1997.
Copyright 1997.  All rights reserved.