ERASSMASTR - eROSITA All-Sky Survey Master Catalog

Overview

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 eROSITA-DE site 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 EROSMASTER. 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 (ERASS1MAIN) and 2.3-5 keV (3-band; ERASS1HARD) source catalogs are also available.

Catalog Bibcode

2024A&A...682A..34M

References

The SRG/eROSITA all-sky survey, First X-ray catalogues and data release of
    the Western Galactic hemisphere. Merloni A., Lamer G., Liu T., Ramos-Ceja
    M.E., Brunner H. Bulbul E., Dennerl K., Doroshenko V., Freyberg M.J.,
    Friedrich S., Gatuzz E., Georgakakis A., Haberl F., Igo Z., Kreykenbohm
    I., Liu A., Maitra C., Malyali A., Mayer M.G.F., Nandra K., Predehl P.,
    Robrade J., Salvato M., Sanders J.S., Stewart I., Tubin-Arenas D., Weber
    P., Wilms J., Arcodia R., Artis E., Aschersleben J., Avakyan A., Aydar
    C., Bahar Y.E., Balzer F., Becker W., Berger K., Boller T., Bornemann W.,
    Brueggen M., Brusa M., Buchner J., Burwitz V., Camilloni F., Clerc N.,
    Comparat J., Coutinho D., Czesla S., Dannhauer S.M., Dauner L., Dauser
    T., Dietl J., Dolag K., Dwelly T., Egg K., Ehl E., Freund S., Friedrich
    P., Gaida R., Garrel C., Ghirardini V., Gokus A., Gruenwald G., Grandis
    S., Grotova I., Gruen D., Gueguen A., Haemmerich S., Hamaus N., Hasinger
    G., Haubner K., Homan D., Ider Chitham J., Joseph W.M., Joyce A., Koenig
    O., Kaltenbrunner D.M., Khokhriakova A., Kink W., Kirsch C., Kluge M.,
    Knies J., Krippendorf S., Krumpe M., Kurpas J., Li P., Liu Z., Locatelli
    N., Lorenz M., Mueller S., Magaudda E., Mannes C., McCall H., Meidinger
    N., Michailidis M., Migkas K., Munoz-Giraldo D., Musiimenta B.,
    Nguyen-Dang N.T., Ni Q., Olechowska A., Ota N., Pacaud F., Pasini T.,
    Perinati E., Pires A.M., Pommranz C., Ponti G., Poppenhaeger K.,
    Puehlhofer G., Rau A., Reh M., Reiprich T.H., Roster W., Saeedi S.,
    Santangelo A., Sasaki M., Schmitt J., Schneider P.C., Schrabback T.,
    Schuster N., Schwope A., Seppi R., Serim M.M., Shreeram S., Sokolova-Lapa
    E., Starck H., Stelzer B., Stierhof J., Suleimanov V., Tenzer C.,
    Traulsen I., Truemper J., Tsuge K., Urrutia T., Veronica A., Waddell
    S.G.H., Willer R., Wolf J., Yeung M.C.H., Zainab A., Zangrandi F., Zhang
    X., Zhang Y., Zheng X. <Astron. Astrophys. 682, A34 (2024)>
    =2024A&A...682A..34M (SIMBAD/NED BibCode)

Provenance

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 DR1 site.

Parameters

Unique_ID
The unique identifier for each entry in the catalog. These are named by 'ERASS1_'+ ObsID.

ObsID
The sky tile identifier, which are numbered according to their right ascension (RRR) and declination (DDD) following the scheme RRRDDD. The HEASARC adjusted the original ObsID values to have 6 digits, padded with "0's" to adjust the <3-digit values associated with the right ascension component.

Owner
The code identifying the data rights owner as follows:

        0 : Both MPE/IKI
        1 : IKI only (therefore not included in the current release)
        2 : MPE only

RA
The right ascension, in sexagesimal J2000 units, associated with the center of the sky tile.

Dec
The declination, in sexagesimal J2000 units, associated with the center of the sky tile.

RA_Min
The minimum value of the right ascension, in decimal degrees, corresponding to the sky tile boundary.

RA_Max
The maximum value of the right ascension, in decimal degrees, corresponding to the sky tile boundary.

Dec_Min
The minimum value of the declination, in decimal degrees, corresponding to the sky tile boundary.

Dec_Max
The maximum value of the declination, in decimal degrees, corresponding to the sky tile boundary.

LII
The galactic longitude, in degrees, associated with the center of the sky tile.

BII
The galactic latitude, in degrees, associated with the center of the sky tile.

X_Overlap
The minimum overlap (in arcminutes) in X (right ascension) between the sky tile and any adjacent tile. The survey sky tiling scheme is shown here.

Y_Overlap
The minimum overlap (in arcminutes) in Y (declination) between the sky tile and any adjacent tile. The survey sky tiling scheme is shown here.

N_Field
The number of adjacent tiles, between 6 to 9. The identifications for these adjacent tiles are given as skytile_N where N = 1 to n_field.

Skytile_1
The ObsID for the first adjacent sky tile. The adjacent sky tiles are listed in increasing order, from field skytile_1 to skytile_N, where N is given by the parameter, n_field. This parameter is blank (null) for N > n_field.

Skytile_2
The ObsID for the second adjacent sky tile. The adjacent sky tiles are listed in increasing order, from field skytile_1 to skytile_N, where N is given by the parameter, n_field and 'NULL' for N > n_field.

Skytile_3
The ObsID for the third adjacent sky tile. The adjacent sky tiles are listed in increasing order, from field skytile_1 to skytile_N, where N is given by the parameter, n_field and 'NULL' for N > n_field.

Skytile_4
The ObsID for the fourth adjacent sky tile. The adjacent sky tiles are listed in increasing order, from field skytile_1 to skytile_N, where N is given by the parameter, n_field and 'NULL' for N > n_field.

Skytile_5
The ObsID for the fifth adjacent sky tile. The adjacent sky tiles are listed in increasing order, from field skytile_1 to skytile_N, where N is given by the parameter, n_field and 'NULL' for N > n_field.

Skytile_6
The ObsID for the sixth adjacent sky tile. The adjacent sky tiles are listed in increasing order, from field skytile_1 to skytile_N, where N is given by the parameter, n_field and 'NULL' for N > n_field.

Skytile_7
The ObsID for the seventh adjacent sky tile, where applicable. The adjacent sky tiles are listed in increasing order, from field skytile_1 to skytile_N, where N is given by the parameter, n_field. This parameter is blank (null) for N > n_field.

Skytile_8
The ObsID for the eighth adjacent sky tile, where applicable. The adjacent sky tiles are listed in increasing order, from field skytile_1 to skytile_N, where N is given by the parameter, n_field and 'NULL' for N > n_field.

Skytile_9
The ObsID for the ninth adjacent sky tile, where applicable. The adjacent sky tiles are listed in increasing order, from field skytile_1 to skytile_N, where N is given by the parameter, n_field and 'NULL' for N > n_field.

File_ID
The file path for the associated data products, which are organized by the the ObsID values split from RRRDDD format into 'DDD/RRR'. Additional information about the data products is available in the reference paper and from the eROSITA-DE eRODat site.

Contact Person

Questions regarding the ERASSMASTR database table can be addressed to the HEASARC Help Desk.

Page Author: Browse Software Development Team
Last Modified: Thursday, 19-Sep-2024 13:35:53 EDT