A Method for obtaining reliable IRAS-LRS data via IRAS-server

S.J. Chan
IAC

R. Assendorp
AIP

Th. Henning
MPS-RU ``Dust in Star-forming Regions''

Session ID: P1.03   Type: poster

Abstract:

The method for processing IRAS-LRS data via IRAS-server is present. This is part of an effort to search for an emission feature at 21 m from IRAS data base. Using the IR-GIPSY software, we are able to obtain and to select reliable LRS spectra from the IRAS database. The IRAS server which was developed by the SRON performs the data processing steps in which specific IRAS data are requested. GIPSY has been developed to reduce and analyze the data. Four main programs which are TRACKS, PLSCAN, LRSCAL and GDS2TEXT (instead of only LRSCAL) were heavily used for processing the extracted LRS data in this study. The detailed usage will be reported. The preliminary candidates were selected after this step. In order to decide whether the real or an artefact due to the data reduction, it it necessary to perform two important steps. These are the production of all the IRAS survey maps and all the offset LRS spectra of our preliminary candidates. The main reason is the LRS is a slitless prism spectrometer. Furthermore, the output is a convolution of the source structure because the dispersion direction is the same as the IRAS scanning direction. The details about these effects will be discussed. The final candidates were selected after this step.

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