ERASSMASTR ivo://nasa.heasarc/erassmastr NASA/GSFC HEASARC eROSITA-DE Team 2026-06-26 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Observation The eROSITA-DE DR1 comprises data from the first six months of the SRG/eROSITA all-sky survey (eRASS1) whose proprietary rights lie with the German eROSITA consortium. Data rights are split by Galactic longitude (l) and latitude (b), with a division marked by the great circle passing through the Galactic poles (l,b)=(0,+90);(0,-90) and the Galactic Center Sgr A* (l,b)=(359.94423568,-0.04616002): data with -0.05576432< l <179.94423568 degrees (Eastern Galactic hemisphere) belong to the Russian consortium, while data with 359.94423568 > l >179.94423568 degrees (Western Galactic hemisphere) belong to eROSITA-DE. The Western Galactic hemisphere observations were released to the public through the <a href="https://erosita.mpe.mpg.de/dr1/">eROSITA-DE site</a> on 31 January 2024. In the Early Data Release (EDR), the data taken during the Calibration and Performance Verification (Cal-PV) phase were released and are available in <a href="/W3Browse/erosita/erosmaster.html">EROSMASTER</a>. The reprocessed EDR observations are not part of DR1. The primary data products of the eROSITA-DE DR1 consist of calibrated event files, which contain the information generated by the cameras used during the eRASS1 observations. The eSASS4DR1 pipeline creates these event files after the received telemetry data from eROSITA of each observation has been reformatted, packaged, and archived by a pre-processor. Note that the coverage of the sky is not uniform, i.e., not all observations have been performed with all seven eROSITA telescope modules (TMs). The eROSITA-DE team has divided the eRASS1 observations into 4700 sky tiles for practical purposes. Each sky tile has a size of 3.6x3.6 square degrees, overlapping by approximately 20 arcmin. Of the 4700 sky tiles, eROSITA-DE have proprietary rights on 2248 of them, and 199 sky tiles have shared rights between the German and Russian consortiums. eROSITA-DE DR1 comprises 2447 sky tiles in total, of which 199 have partial eROSITA-DE data. The FITS table here, provides the mapping between sky-tile identification and sky coordinates for the 2447 sky tiles. In addition, the 0.2-2.3 (<a href="/W3Browse/erosita/erass1main.html">ERASS1MAIN</a>) and 2.3-5 keV (3-band; <a href="/W3Browse/erosita/erass1hard.html">ERASS1HARD</a>) source catalogs are also available. This database table was created by the HEASARC in August 2024 based on the FITS file of the survey field boundaries available from the eROSITA-DE <a href="https://erosita.mpe.mpg.de/dr1/AllSkySurveyData_dr1/">DR1 site</a>. This is a service provided by NASA HEASARC . 2024A&A...682A..34M https://heasarc.gsfc.nasa.gov/W3Browse/all/erassmastr.html Archive Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=erassmastr& GET text/xml 180 99999 true 0 -90 2.66666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=erassmastr GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_erassmastr&Action=More+Options&Action=Parameter+Search&ConeAdd=1 SRG-EROSITA 2.66666666666667 X-ray public erassmastr eROSITA All-Sky Survey Master Catalog obsid Sky Tile Identifier meta.id;obs int nullable ra Right Ascension of the Center of the Sky Tile degree pos.eq.ra;meta.main double nullable dec Declination of the Center of the Sky Tile degree pos.eq.dec;meta.main double nullable ra_min Minimum Value of Right Ascension Corresponding to the Sky Tile Boundary degree pos.eq.ra;meta.main;stat.min double nullable ra_max Maximum Value of Right Ascension Corresponding to the Sky Tile Boundary degree pos.eq.ra;meta.main;stat.max double nullable dec_min Minimum Value of Declination Corresponding to the Sky Tile Boundary degree pos.eq.dec;meta.main;stat.min double nullable dec_max Maximum Value of Declination Corresponding to the Sky Tile Boundary degree pos.eq.dec;meta.main;stat.max double nullable lii Galactic Longitude of the Center of the Sky Tile degree pos.galactic.lon double nullable n_field Number of Adjacent Tiles meta.number short nullable skytile_3 ObsID of the Third Adjacent Sky Tile meta.id;obs.field int nullable skytile_6 ObsID of the Sixth Adjacent Sky Tile meta.id;obs.field int nullable skytile_1 ObsID of the First Adjacent Sky Tile meta.id;obs.field int nullable bii Galactic Latitude of the Center of the Sky Tile degree pos.galactic.lat double nullable skytile_2 ObsID of the Second Adjacent Sky Tile meta.id;obs.field int nullable y_overlap Minimum Overlap in Declination Between the Sky Tile and Any Adjacent Tile arcmin pos;obs.field;stat.min double nullable skytile_5 ObsID of the Fifth Adjacent Sky Tile meta.id;obs.field int nullable owner Code Identifying the Data Rights Owner meta.code short nullable skytile_7 ObsID of the Seventh Adjacent Sky Tile, Where Applicable meta.id;obs.field int nullable skytile_9 ObsID of the Ninth Adjacent Sky Tile, Where Applicable meta.id;obs.field int nullable x_overlap Minimum Overlap in Right Ascension Between the Sky Tile and Any Adjacent Tile arcmin pos;obs.field;stat.min double nullable file_id Path to the Associated Data Products in the Data Archive meta.id;meta.file char nullable skytile_4 ObsID of the Fourth Adjacent Sky Tile meta.id;obs.field int nullable unique_id Unique Identifier (ERASS1_ + ObsID) for Each Entry in Catalog meta.id;meta.main char nullable skytile_8 ObsID of the Eighth Adjacent Sky Tile, Where Applicable meta.id;obs.field int nullable "__x_ra_dec" System unit vector column double nullable "__y_ra_dec" System unit vector column double nullable "__z_ra_dec" System unit vector column double nullable "__row" System index column char nullable