{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:YAT7ZYGMJ3Q3TVZNAXOP2GLBNT","short_pith_number":"pith:YAT7ZYGM","canonical_record":{"source":{"id":"0901.2241","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-01-15T14:13:37Z","cross_cats_sorted":[],"title_canon_sha256":"128c9e57b47e3ca5db8703eadceca740e77aa10cc4f3b4196c163f498f42ec0d","abstract_canon_sha256":"535163da096e0f5ab4f7cbe3d403a6ae134b2eb2ff8031e5998494f03f62cf23"},"schema_version":"1.0"},"canonical_sha256":"c027fce0cc4ee1b9d72d05dcfd19616cd81f74322b436f648241e8a2a3acadae","source":{"kind":"arxiv","id":"0901.2241","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0901.2241","created_at":"2026-07-04T17:14:14Z"},{"alias_kind":"arxiv_version","alias_value":"0901.2241v1","created_at":"2026-07-04T17:14:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0901.2241","created_at":"2026-07-04T17:14:14Z"},{"alias_kind":"pith_short_12","alias_value":"YAT7ZYGMJ3Q3","created_at":"2026-07-04T17:14:14Z"},{"alias_kind":"pith_short_16","alias_value":"YAT7ZYGMJ3Q3TVZN","created_at":"2026-07-04T17:14:14Z"},{"alias_kind":"pith_short_8","alias_value":"YAT7ZYGM","created_at":"2026-07-04T17:14:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:YAT7ZYGMJ3Q3TVZNAXOP2GLBNT","target":"record","payload":{"canonical_record":{"source":{"id":"0901.2241","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-01-15T14:13:37Z","cross_cats_sorted":[],"title_canon_sha256":"128c9e57b47e3ca5db8703eadceca740e77aa10cc4f3b4196c163f498f42ec0d","abstract_canon_sha256":"535163da096e0f5ab4f7cbe3d403a6ae134b2eb2ff8031e5998494f03f62cf23"},"schema_version":"1.0"},"canonical_sha256":"c027fce0cc4ee1b9d72d05dcfd19616cd81f74322b436f648241e8a2a3acadae","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:14:14.031869Z","signature_b64":"ShgPg7wuptwQ0ExI6CeCNu6iTHb1A085jcFuLJJoHM7K2g+J1Vn23waRZxpSQ8k0ekOX2HEyu1YX5nbqwGEYBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c027fce0cc4ee1b9d72d05dcfd19616cd81f74322b436f648241e8a2a3acadae","last_reissued_at":"2026-07-04T17:14:14.031492Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:14:14.031492Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0901.2241","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T17:14:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LbTElxPw8N1p/NMaifmXZqmov32CUfLoPsg/LrO0YzBVEKpS1S+Bg72qjTeyHLQaI17KprSZj5YXKQrlfgUQCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T08:29:46.330066Z"},"content_sha256":"c330bde11cfe0356aa97d22ec201d51599680174eca3a27a004ef22e7ae30c98","schema_version":"1.0","event_id":"sha256:c330bde11cfe0356aa97d22ec201d51599680174eca3a27a004ef22e7ae30c98"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:YAT7ZYGMJ3Q3TVZNAXOP2GLBNT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"From outburst to quiescence: the decay of the transient Anomalous X-ray Pulsar XTE J1810-197","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. Tiengo, D. G\\\"otz, F. Bernardini, G. L. Israel, L. Stella, M. Falanga, N. Rea, R. Perna, R. Turolla, S. Campana, S. Dall'Osso, S. Mereghetti, S. Zane","submitted_at":"2009-01-15T14:13:37Z","abstract_excerpt":"XTE J1810-197 is the first transient Anomalous X-ray Pulsar ever discovered. Its highly variable X-ray flux allowed us to study the timing and spectral emission properties of a magnetar candidate over a flux range of about two orders of magnitude. We analyzed nine XMM-Newton observations of XTE J1810-197 collected over a four years baseline (September 2003 - September 2007). EPIC PN and MOS data were reduced and used for detailed timing and spectral analysis. Pulse phase spectroscopic studies were also carried out for observations with sufficiently high signal to noise. We find that: (i) a thr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0901.2241","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0901.2241/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T17:14:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kB5lm8dip7cH2FrwOCsHnwH6DinHMsrNH8JfMpXPRn65GiJh1a+W0RuzDee6SWnjSz8dTJdp54TCFRAcI2XiCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T08:29:46.330545Z"},"content_sha256":"d086a296d9b8222770bdf6a9aa8857ebf5f2f4952014da2b57942281886e712c","schema_version":"1.0","event_id":"sha256:d086a296d9b8222770bdf6a9aa8857ebf5f2f4952014da2b57942281886e712c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YAT7ZYGMJ3Q3TVZNAXOP2GLBNT/bundle.json","state_url":"https://pith.science/pith/YAT7ZYGMJ3Q3TVZNAXOP2GLBNT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YAT7ZYGMJ3Q3TVZNAXOP2GLBNT/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-15T08:29:46Z","links":{"resolver":"https://pith.science/pith/YAT7ZYGMJ3Q3TVZNAXOP2GLBNT","bundle":"https://pith.science/pith/YAT7ZYGMJ3Q3TVZNAXOP2GLBNT/bundle.json","state":"https://pith.science/pith/YAT7ZYGMJ3Q3TVZNAXOP2GLBNT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YAT7ZYGMJ3Q3TVZNAXOP2GLBNT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:YAT7ZYGMJ3Q3TVZNAXOP2GLBNT","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":"535163da096e0f5ab4f7cbe3d403a6ae134b2eb2ff8031e5998494f03f62cf23","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-01-15T14:13:37Z","title_canon_sha256":"128c9e57b47e3ca5db8703eadceca740e77aa10cc4f3b4196c163f498f42ec0d"},"schema_version":"1.0","source":{"id":"0901.2241","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0901.2241","created_at":"2026-07-04T17:14:14Z"},{"alias_kind":"arxiv_version","alias_value":"0901.2241v1","created_at":"2026-07-04T17:14:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0901.2241","created_at":"2026-07-04T17:14:14Z"},{"alias_kind":"pith_short_12","alias_value":"YAT7ZYGMJ3Q3","created_at":"2026-07-04T17:14:14Z"},{"alias_kind":"pith_short_16","alias_value":"YAT7ZYGMJ3Q3TVZN","created_at":"2026-07-04T17:14:14Z"},{"alias_kind":"pith_short_8","alias_value":"YAT7ZYGM","created_at":"2026-07-04T17:14:14Z"}],"graph_snapshots":[{"event_id":"sha256:d086a296d9b8222770bdf6a9aa8857ebf5f2f4952014da2b57942281886e712c","target":"graph","created_at":"2026-07-04T17:14:14Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/0901.2241/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"XTE J1810-197 is the first transient Anomalous X-ray Pulsar ever discovered. Its highly variable X-ray flux allowed us to study the timing and spectral emission properties of a magnetar candidate over a flux range of about two orders of magnitude. We analyzed nine XMM-Newton observations of XTE J1810-197 collected over a four years baseline (September 2003 - September 2007). EPIC PN and MOS data were reduced and used for detailed timing and spectral analysis. Pulse phase spectroscopic studies were also carried out for observations with sufficiently high signal to noise. We find that: (i) a thr","authors_text":"A. Tiengo, D. G\\\"otz, F. Bernardini, G. L. Israel, L. Stella, M. Falanga, N. Rea, R. Perna, R. Turolla, S. Campana, S. Dall'Osso, S. Mereghetti, S. Zane","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-01-15T14:13:37Z","title":"From outburst to quiescence: the decay of the transient Anomalous X-ray Pulsar XTE J1810-197"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0901.2241","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:c330bde11cfe0356aa97d22ec201d51599680174eca3a27a004ef22e7ae30c98","target":"record","created_at":"2026-07-04T17:14:14Z","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":"535163da096e0f5ab4f7cbe3d403a6ae134b2eb2ff8031e5998494f03f62cf23","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-01-15T14:13:37Z","title_canon_sha256":"128c9e57b47e3ca5db8703eadceca740e77aa10cc4f3b4196c163f498f42ec0d"},"schema_version":"1.0","source":{"id":"0901.2241","kind":"arxiv","version":1}},"canonical_sha256":"c027fce0cc4ee1b9d72d05dcfd19616cd81f74322b436f648241e8a2a3acadae","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c027fce0cc4ee1b9d72d05dcfd19616cd81f74322b436f648241e8a2a3acadae","first_computed_at":"2026-07-04T17:14:14.031492Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:14:14.031492Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ShgPg7wuptwQ0ExI6CeCNu6iTHb1A085jcFuLJJoHM7K2g+J1Vn23waRZxpSQ8k0ekOX2HEyu1YX5nbqwGEYBw==","signature_status":"signed_v1","signed_at":"2026-07-04T17:14:14.031869Z","signed_message":"canonical_sha256_bytes"},"source_id":"0901.2241","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c330bde11cfe0356aa97d22ec201d51599680174eca3a27a004ef22e7ae30c98","sha256:d086a296d9b8222770bdf6a9aa8857ebf5f2f4952014da2b57942281886e712c"],"state_sha256":"a7a3bde833ac8911f213fbd0180a64307aaefeb2e3d056c42bd1e3fd2cd93b3c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4L1QH07sSagDw8lg57F0DWEdXEmy6IZdwjefdqFX55eEOHltY92Y2KavigSNzUI1aG0D3rfodSse0s3ae7WsCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-15T08:29:46.335196Z","bundle_sha256":"73eb3a81397a5d468a4acb04221a2597a2b10ead1a61877e09212aa7e1f990ca"}}