Archive Projects

I. Highly Processed Data Products
A catalogue of ISOPHOT far-infrared observations of normal stars in mini-map mode

A. Moór, P. Ábrahám, Sz. Csizmadia, Cs. Kiss

 

Content of the catalogue

A photometric catalogue of 555 far-infrared observations of normal stars measured in the ISOPHOT mini-map mode with C100/C200 after revolution 95, and additionally some giant stars from the ISOPHOT standard lists. A few 1D-scans are also included.

Scientific applications

The catalogue can be used to select Vega-like stars, i.e. main-sequence stars exhibiting far-infrared excess. It can also help to select standards for future infrared space missions.

Publication

Astronomy and Astrophysics paper, 2004 spring.

Availability

The catalogue was submitted to ISO Data Archive in May 2003, and became available for the public via the ISO Data Archive web in July 2003.

Special processing features

  • correction for short-term signal transients;
  • correction for long-term baseline variations;
  • check if the object is point-like or extended;
  • an additive correction for the photometric zero point offset at low flux level;
  • a multiplicative correction for systematic photometric deviations at high flux level.

The corrections were developed and tested on the stellar sample itself, predicting model fluxes from their K-magnitudes and assuming that the majority of them do not exhibit any infrared excess.

Typical photometric accuracies

The average error bars are ~5% for bright sources and 5 mJy for faint sources. The latter value is about a factor of 3 better than the IRAS FSC. For small extended sources special treatment.

Example from the catalogue

 

The full catalog

The full catalogue in ASCII format can be downloaded here. The column description and quality codes are presented in the catalogue header.

Documentation

A detailed report on the special processing applied is presented here in Postscript.