{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:STQMPK27DB2PRFRMFLCU74Q7XS","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"e69da3fa2ff8ced2989260f10e73ea5cac4142fd3bfe8d69a4b003ba06ab196d","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-09-02T19:56:17Z","title_canon_sha256":"4513cc0c41b324da35b5cf5ca6443b66d868ff562fa8638c8209c93f8dc84238"},"schema_version":"1.0","source":{"id":"1509.00840","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.00840","created_at":"2026-05-18T01:32:26Z"},{"alias_kind":"arxiv_version","alias_value":"1509.00840v1","created_at":"2026-05-18T01:32:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.00840","created_at":"2026-05-18T01:32:26Z"},{"alias_kind":"pith_short_12","alias_value":"STQMPK27DB2P","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"STQMPK27DB2PRFRM","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"STQMPK27","created_at":"2026-05-18T12:29:42Z"}],"graph_snapshots":[{"event_id":"sha256:92fe67777b66a9e0b53bca2d916962e638a9d878fee27f30c756dd3f203e50c0","target":"graph","created_at":"2026-05-18T01:32:26Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We report on the discovery of an ultrasoft X-ray transient source, 3XMM J152130.7+074916. It was serendipitously detected in an XMM-Newton observation on 2000 August 23, and its location is consistent with the center of the galaxy SDSS J152130.72+074916.5 (z=0.17901 and d_L=866 Mpc). The high-quality X-ray spectrum can be fitted with a thermal disk with an apparent inner disk temperature of 0.17 keV and a rest-frame 0.24-11.8 keV unabsorbed luminosity of ~5e43 erg/s, subject to a fast-moving warm absorber. Short-term variability was also clearly observed, with the spectrum being softer at lowe","authors_text":"Dacheng Lin, Didier Barret, Dirk Grupe, Jimmy A. Irwin, Natalie A. Webb, Olivier Godet, Peter W. Maksym, S. Komossa, Stephen D. J. Gwyn","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-09-02T19:56:17Z","title":"An Ultrasoft X-ray Flare from 3XMM J152130.7+074916: a Tidal Disruption Event Candidate"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.00840","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:77d1c6582b506f5926369dbb73ccaa08f7c73a4ad39cba3462e449e20cd5a4f5","target":"record","created_at":"2026-05-18T01:32:26Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"e69da3fa2ff8ced2989260f10e73ea5cac4142fd3bfe8d69a4b003ba06ab196d","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-09-02T19:56:17Z","title_canon_sha256":"4513cc0c41b324da35b5cf5ca6443b66d868ff562fa8638c8209c93f8dc84238"},"schema_version":"1.0","source":{"id":"1509.00840","kind":"arxiv","version":1}},"canonical_sha256":"94e0c7ab5f1874f8962c2ac54ff21fbc8e20f7e963c90d3c9eb839d2ceaf1874","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"94e0c7ab5f1874f8962c2ac54ff21fbc8e20f7e963c90d3c9eb839d2ceaf1874","first_computed_at":"2026-05-18T01:32:26.629819Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:32:26.629819Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yDZHt1DvgpSRQKiaJb/oMKrIvkXqtCWms8ZQbnO7ykZhxoAjLeKMbhAKGZ+zFWEFhnzwSB4sSuFRtulhbEuABQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:32:26.630691Z","signed_message":"canonical_sha256_bytes"},"source_id":"1509.00840","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:77d1c6582b506f5926369dbb73ccaa08f7c73a4ad39cba3462e449e20cd5a4f5","sha256:92fe67777b66a9e0b53bca2d916962e638a9d878fee27f30c756dd3f203e50c0"],"state_sha256":"d657f0447b3395fc678d399a6c4191b1ced70a6fd8de9e0c037141989bb0c151"}