Archive Projects

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

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

 

Sparse map was a widely used observing mode of ISOPHOT detectors in order to measure fluxes of a lot of sources (maximum 30) within 3 degrees on the sky. This observing mode allowed to save time. We concentrated the sparse maps obtained by the C100 and C200 detectors only. The total observing time was more than 2000 hours with this detectors and 1695 and 1087 (in total 2782) individual TDTs were obtained by the C100 and C200 detector, respectively. Note that the number of sources measured in this mode is less than these numbers because they includes the background observations as well.

By June, 2004 we finalized the calibration of sparse maps obtained by the C100/C200 detectors at 60, 90, 100, 105, 150 and 170 micrometers. Note that there were a few or no observations on primary or secondary standards in 65, 80 and 120 micrometers in this mode and hence their calibration is less reliable than in other wavelengths. The required software enviroment for the calibration and data reduction procedure is now completed (including automatic as well a interactive steps). The accuracy of sparse map is 50-60 mJy at faint levels and 12-13% at moderate and high levels in general using our procedure and calibration methods.

The first catalogue of sparse map observations including the normal star measurements will be published soon.