The ROSAT X-Ray All-Sky Survey

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.

Data

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 (plot; list) 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:

Zone-wise Field Lists: The lists contain all fields corresponding to individual zones. Links are available to the README file, to an X-ray colour image of the field, and to the directory containing all basic data of the field.
Complete Field Lists: The list contains all fields of all zones. Links are available to the README file, to an X-ray colour image of the field, and to the directory containing all basic data of the field.

Anonymous ftp: Example: get all basic data files of field 930101p.

  ftp ftp.xray.mpe.mpg.de
  user ftp, password <you@your.account>
  cd rosat/archive/900000/930101p
  mget *
  quit

All-Sky Maps (RASS 3):
- Exposure map: fits / ps / jpg
- Countrate map, 0.1 - 0.4 keV: fits / ps / jpg
- Countrate map, 0.4 - 2.4 keV: fits / ps / jpg
- Background countrate map, 0.1 - 0.4 keV: fits / ps / jpg
- Background countrate map, 0.4 - 2.4 keV: fits / ps / jpg

Tools

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.

Projects

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