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eROSITA Archive

eROSITA Archive Access

The Cal-PV program of the SRG mission took place between mid-September and mid-December 2019. During this Cal-PV phase, over one hundred individual pointings and field scans were performed with eROSITA as prime instrument. The CAL-PV observations that were proposed by eROSITA-DE are released to the public through the eROSITA-DE Early Data Release (EDR) as of June 28 2021.

The eROSITA catalogs can be accessed through the following HEASARC multi-mission interfaces:

HEASARC Browse interface The classic multi-mission interface
HEASARC Xamin interface (including a command-line batch interface) HEASARC next-generation multi-mission data portal
Astronomy data access through Python Using Python and generic VO interfaces.

The eROSITA data archive can be accessed through the following:

API access from MPE and HEASARC Access using web-based application programming interface (API) services
HTTPS Download or wget or script. See also related command-line download methods Direct data retrieval without browsing the observation logs.

eROSITA All-Sky Survey Data - First 6 Months (eRASS1)

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.

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 reformated, 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 TMs (see here).

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. Users can access all the data products associated with the sky tiles using the HEASARC ERASSMASTR catalog via the HEASARC Browse or Xamin services.

In addition, the HEASARC provides access to two eRASS1 source catalogs: ERASS1MAIN and ERASS1HARD. The former provides X-ray sources detected in the 0.2-2.3 keV band; the latter provides Hard eRASS1 detections from the 3B (in the 2.3-5.0 keV band) eSASS source detection analysis. Additional information for eRASS1 source catalogs are available from the eROSITA-DE catalogs page.

eROSITA Early Release Data (EDR)

Around thirty different fields have been observed. There is a variety of covered areas and exposures. eROSITA-DE is releasing calibrated event lists for each observation so scientists around the world can use the data for their research. These data are provided here and additional information can be found from the eROSITA-DE EDR Observations page.

Moreover, the eROSITA-DE team has obtained source catalogs for some of these observations. Further details can be found at the eROSITA-DE EDR Catalogues page. The HEASARC has also ingested a number of these, see column with "Available Catalogs at HEASARC".

An important piece in X-ray analysis is the Filter Wheel Closed (FWC) data, which helps to assess the level of instrumental background. eROSITA-DE is also releasing FWC data and models here .

Survey Fields

Field Available catalogs at MPE Available catalogs at HEASARC Number of observations Obs. ID R.A. / Dec. [deg] Observation type
eFEDS* [1] Yes Main [FITS] Hard [FITS] EFEDSMAIN [Browse] EFEDSHARD [Browse] 4 300007 129.55 / 1.50 Scan
300008 133.86 / 1.50 Scan
300009 138.14 / 1.50 Scan
300010 142.45 / 1.50 Scan
eta Cha Yes Main [FITS] Hard [FITS] ETACHAMAIN [Browse] ETACHAHARD [Browse] 1 300004 130.33 / -78.96 Scan

[1] On September 2021 it was discovered a calibration error in the photon arrival time correction (of 1 second) on approximately half of the TM6 data of eFEDS sub-field I before a malfunction. The error causes the photons to be projected onto the sky with an offset of ~13 arcsec on either side of the true source position, resulting in an elongation of the merged all camera PSF in the scanning direction in the affected area. The affected period spans from: UTC=2019-11-03 13:03:12.25 until UTC=2019-11-03 21:04:53.03. Users are advised to take this error into account. For more details check Brunner et al. 2021.

* Spectra and light curves of the sources in the eFEDS observation can be retrieved when using the eROSITA-DE cone search tool. Click here to access eFEDS images, exposure maps and background maps.

Magellanic Clouds

Field Available catalogs at MPE Available catalogs at HEASARC Number of observations Obs. ID R.A. / Dec. [deg] Observation type
LMC SN1987A No No 4 700016 83.84 / -69.31 Pointing / Calibration
700161 83.84 / -69.31 Pointing / Calibration
700203 83.84 / -69.31 Scan / Calibration
700204 83.84 / -69.31 Scan / Calibration
LMC N132D No No 8 700156 81.26 / -69.64 Pointing / Calibration
700179 81.26 / -69.64 Pointing / Calibration
700182 80.51 / -69.85 Pointing / Calibration
700183 81.99 / -69.43 Pointing / Calibration
700184 80.69 /-69.38 Pointing / Calibration
700185 81.90 / -69.89 Pointing / Calibration
700201 81.26 / -69.64 Scan / Calibration
700202 81.26 / -69.64 Scan / Calibration
PSR J0540-6919 No No 1 700206 85.05 / -69.33 Pointing
PSR J0537-6910 No No 1 700205 84.44 / -69.17 Pointing
PSR J0540 PSR J0537 No No 1 700207 84.74 / -69.25 Pointing
1ES 0102-72 No No 5 700001 16.01 / -72.03 Pointing / Calibration
700002 15.04 / -71.89 Pointing / Calibration
700003 16.99 / -72.170 Pointing / Calibration
700004 16.28 / -71.85 Pointing / Calibration
700005 16.42 /-71.76 Pointing / Calibration

Galactic Fields

Field Available catalogs at MPE Available catalogs at HEASARC Number of observations Obs. ID R.A. / Dec. [deg] Observation type
NGC 2516 No No 2 700018 119.58 / -60.87 Pointing / Calibration
700019 119.58 / -60.87 Pointing / Calibration
PSR B0656+14 No No 1 300000 104.95 / 14.23 Pointing
PSR 1509-58 No No 2 900035 228.84 / -59.10 Pointing
900043 228.85 / -59.11 Pointing
IGR J13020-6359 (2RXP J130159-635806) No No 1 900033 196.00 / -63.97 Pointing
IGR J16318-4848 No No 1 900062 248.24 / -48.74 Pointing
OAO 1657-415 No No 1 900072 255.45 / -41.56 Pointing
1RXS J072025-312554 No No 1 700007 110.10 / -31.43 Pointing / Calibration
Vela SNR No No 1 700039 132.19 / -45.61 Pointing / Calibration
Puppis A No No 1 700195 126.03 / -43.00 Scan/Calibration
HR 3165 (zet Pup) No No 1 700167 120.90 / -40.00 Pointing / Calibration
Crab (I, II, III, IV) No No Several 900056 83.47 / 21.88 Pointing
900075-900182 - Pointing

Extragalactic Fields

Field Available catalogs at MPE Available catalogs at HEASARC Number of observations Obs. ID R.A. / Dec. [deg] Observation type
RE J2334-471 No No 2 700180 353.51 / -47.24 Pointing / Calibration
700181 353.76 / -47.526 Pointing / Calibration
A3158 No No 1 700177 55.73 / -53.63 Pointing
A3266 No No 1 700154 67.84 / -61.44 Pointing
1H0707 No No 1 300003 107.17 / -49.55 Pointing
NGC 7793 P13 No No 1 300011 359.46 / -32.62 Pointing
47 Tuc (NGC 104) No No 8 700011 5.52 / -71.98 Pointing / Calibration
700012 6.53 / -72.17 Pointing / Calibration
700013 6.33 / -71.93 Pointing / Calibration
700014 5.71 / -72.24 Pointing / Calibration
700163 6.53 / -72.18 Pointing / Calibration
700173 5.52 / -71.98 Pointing / Calibration
700174 6.53 / -72.18 Pointing / Calibration
700175 6.33 / -71.92 Pointing / Calibration
TGUH2213P1 (Dark Cloud) No No 1 300017 285.59 / -37.12 Pointing
A3391/A3395 No No 4 300014 96.71 / -54.07 Pointing
300005 96.71 / -54.07 Scan
300006 96.71 / -54.07 Scan
300016 96.71 / -54.07 Scan
1RXS J185635-375433 No No 1 700008 284.15 / -37.91 Pointing / Calibration
3C390.3 No No 4 900060 281.54 / 79.87 Pointing
900068 281.50 / 79.88 Pointing
900069 281.49 / 79.89 Pointing
900070 281.48 / 79.89 Pointing