The ROSAT X-Ray All-Sky Survey - Help
Requested data product
Click at any position of the all-sky map in order to obtain the requested data
product for the corresponding 6.4 deg x 6.4 deg RASS sky field.
The whole sky has been divided into
1378 RASS fields each 6.4 deg x 6.4 deg wide.
The fields are distributed according to the
RASS field structure
Neighboring fields are overlapping by at least 0.23 degrees. Each field
can be identified by a (equatorial latitude) zone number running from 1 to 33
and a (equatorial longitude) segment number
running from 1 to 64, depending on the zone number.
Accordingly there are 1378 directories in the ROSAT Data Archive
each containing a README file and 10 FITS files.
The names of the data directories have been adapted
to match other ROSAT archival data.
A 6 digit number (ROR number) is followed by 'p' for the detector used (PSPC).
The ROR number consists of '93' as the first two digits
('9' for ROR category 'other and survey data'),
digits 3 and 4 correspond to the zone number,
5 and 6 to the segment number.
The survey data were distributed into these fields.
The final data sets are the same as for pointed data.
The RASS fits data files start with the 2 characters "rs" to
indicate survey data.
There are several ways to retrieve the ROSAT All-Sky Survey Data:
- RASS Field Conversion:
Determines all RASS fields which contribute to a given sky field.
- RASS Sequence Browser:
Returns all ROSAT (pointed and survey) observations
which are conforming to specified selection criteria.
- ROSAT Source Browser:
Selects and plots objects from the ROSAT master source catalogues
according to various selection criteria.
- ROSAT Data Browser:
Based on the photon event files of all public ROSAT observations
and all ROSAT master source catalogues at the MPE ROSAT data archive.
Creates a (optionally merged) photon and exposure image of the
requested region, including indications for objects from the
ROSAT master source catalogues.
- Bright Source Catalogue:
Various information on the ROSAT All-Sky Survey Bright Source Catalogue
- Faint Source Catalogue:
Various information on the ROSAT All-Sky Survey Faint Source Catalogue
- Soft X-ray Diffuse Background:
Various information on the Soft X-ray Diffuse Background
Feedback to xray-info (at) mpe . mpg . de
© MPE / Max-Planck-Institut für extraterrestrische Physik / Impressum
Page author: Jakob Englhauser
/ 2000-Mar-20 ... 2000-Mar-21