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ASM Data Products RXTE
FAQ

For the latest ASM weather map results results,
visit the RXTE ASM X-ray Weather Map

For the latest results for a particular source
visit the ASM Source Catalog

For the latest calibration news on the FITS products
visit the ASM Events page

For a comprehensive 'how-to' on data analysis techniques
visit to the ASM Recipe



When you use ASM data products in a paper or talk, please include the phrase: "results provided by the ASM/RXTE teams at MIT and at the RXTE SOF and GOF at NASA's GSFC."

Introduction

The ASM Products Database makes available results from the RXTE All Sky Monitor. These results include light curves for around 350 sources, intensities in three sub-energy bands (or "colors") for each of these sources, a history of the ASM pointings, and information on the fits used to generate the intensities. The database provides these data files in FITS format. (MIT's ASM Light Curves Overview page provides GIF images and ASCII files for the light curves.)

The database consists of both Quicklook and Definitive versions of the Products. The Quicklook Products are derived from analysis of the real-time data performed in the RXTE SOF. They are normally updated every three hours and include data from up to the previous two weeks. The Quicklook Products are superceded by updates to the Definitive Products, which are produced at MIT from the final production data. The Definitive Products are usually updated weekly.

Quicklook ASM results are also available via the ASM Weather Map. The map provides an "at a glance" look at the X-ray sky, and an accompanying table provides the latest x-ray intensity values for active sources in the ASM catalogue. Selecting a source name from the table produces a plot and ASCII table of the light curve over the previous two weeks.

A more complete description of the ASM products may be found in The XTE All Sky Monitor Data Products. (This document is also available via anonymous FTP as the PostScript file asm_products_v150.ps.) The recipe Working with the ASM Products offers tips for analyzing the ASM data products.


Useage Notes


Access to the ASM Data Products

  1. Via FTP: The ASM Data Products are accessible via anonymous FTP from this page in the following subdirectories of /xte/data/archive/ASMProducts.

    Direct anonymous FTP access via legacy.gsfc.nasa.gov is also available.

  2. Via Browse:

    • For the Definitive Products, choose the XTE All-Sky Monitor Long-term Observed Sources (XTEASMLONG) catalog. After giving the name or coordinates of a particular source, the user may then either choose to retrieve the products individually or in data product sets. The STANDARD set consists of both the light curve and the color file for the object. The POINTINGS set consists of all of the weekly ASM pointing files.

    • For the Quicklook Products choose the XTE All-Sky Monitor Quicklook Observed Targets (XTEASMQUICK) catalog. After giving the name or coordinates of a particular source, Browse will list the intensity values at times spanning the previous two weeks. After choosing any of these rows, the user may then choose to retrieve the quicklook products either individually or in the data product sets. As with the definitive products, the STANDARD set consists of both the light curve and the color file for the object. The POINTINGS set consists of all the daily ASM pointing files presently in the real-time archive.


More Information about the ASM


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This page is maintained by the RXTE GOF and was last modified on Monday, 20-Aug-2001 08:33:01 EDT.