What question did this study set out to answer?

To report the initial use of the eROSITA-DE Data Release 1 archive in analyzing cluster sources.

June 1, 2026Open Access

NT28: eROSITA-DE DR1 Preliminary

Key Points

To report the initial use of the eROSITA-DE Data Release 1 archive in analyzing cluster sources.
Implemented Route 3 of the eccentricity unification from NT25
Manually extracted data from the eRODat portal
Utilized the DR1 cluster catalogue consisting of 12,247 clusters
Identified 9 official DR1 sources including the Virgo Cluster and 8 sources in Abell 3558
Confirmed the overall quality of the DR1 catalogue
Field diameter was calculated as being 0.17% of 3.6 Mpc

Abstract

This note reports the first COCM use of the eROSITA-DE Data Release 1 (DR1) archive, implementing Route 3 of the three-route eccentricity unification of NT25: , where is the sector invariant. The full analysis requires the DR1 cluster catalogue (erass1clₘainᵥ3. 2. fits, 12, 247 clusters, Bulbul et al. 2024). As preliminary result, manual extraction from the eRODat portal yields 9 official DR1 sources: the Virgo Cluster and 8 extended sources in the Abell 3558 field. These confirm DR1 catalogue quality but are insufficient to measure — the field diameter (3. 6 Mpc) is 0. 17% of Mpc. Claim 7 () remains Ab (Abierto). Protocol fully defined; companion Python script provided.

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