{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2006:CIEXY3VH5M3ZM3YJH77BT56ZYM","short_pith_number":"pith:CIEXY3VH","canonical_record":{"source":{"id":"astro-ph/0609412","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2006-09-14T16:02:18Z","cross_cats_sorted":[],"title_canon_sha256":"5e9b0442612029cb4bc47ff96c5beb02f7469d3fd58f2d0a0de9e39fd77df985","abstract_canon_sha256":"23853fef59827d94b51c728afc27286703086e0203c5376c4802b56650cd0920"},"schema_version":"1.0"},"canonical_sha256":"12097c6ea7eb37966f093ffe19f7d9c30713a5465e07cd7308ba5962f492d5d9","source":{"kind":"arxiv","id":"astro-ph/0609412","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0609412","created_at":"2026-07-04T15:25:54Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0609412v1","created_at":"2026-07-04T15:25:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0609412","created_at":"2026-07-04T15:25:54Z"},{"alias_kind":"pith_short_12","alias_value":"CIEXY3VH5M3Z","created_at":"2026-07-04T15:25:54Z"},{"alias_kind":"pith_short_16","alias_value":"CIEXY3VH5M3ZM3YJ","created_at":"2026-07-04T15:25:54Z"},{"alias_kind":"pith_short_8","alias_value":"CIEXY3VH","created_at":"2026-07-04T15:25:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2006:CIEXY3VH5M3ZM3YJH77BT56ZYM","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0609412","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2006-09-14T16:02:18Z","cross_cats_sorted":[],"title_canon_sha256":"5e9b0442612029cb4bc47ff96c5beb02f7469d3fd58f2d0a0de9e39fd77df985","abstract_canon_sha256":"23853fef59827d94b51c728afc27286703086e0203c5376c4802b56650cd0920"},"schema_version":"1.0"},"canonical_sha256":"12097c6ea7eb37966f093ffe19f7d9c30713a5465e07cd7308ba5962f492d5d9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:25:54.405576Z","signature_b64":"B3x4VzSWRRoWGKI+xikc0x59B31ynpwiEe4qfDMqDE95BAd9VH0ouJkS+zyfpfssHzdwRZ0kZK4LnxKW4JHMCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"12097c6ea7eb37966f093ffe19f7d9c30713a5465e07cd7308ba5962f492d5d9","last_reissued_at":"2026-07-04T15:25:54.405072Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:25:54.405072Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0609412","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":"2026-07-04T15:25:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sR15FaW+KnBXs9inrjQVNI7V2ATTSOfu+7WHDxEMFBgnkRRGA4WnxER+Cl+dHQTpI4NHMVLPQCqTLKJbFnuxCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T19:34:43.823713Z"},"content_sha256":"f91f13a2c3fea26454eacb14aa912b2c1655c2dae44ff78b4fd480b61c6ac1aa","schema_version":"1.0","event_id":"sha256:f91f13a2c3fea26454eacb14aa912b2c1655c2dae44ff78b4fd480b61c6ac1aa"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2006:CIEXY3VH5M3ZM3YJH77BT56ZYM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Small-Scale X-ray Variability in the Cassiopeia A Supernova Remnant","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"D. J. Patnaude, R. A. Fesen","submitted_at":"2006-09-14T16:02:18Z","abstract_excerpt":"A comparison of X-ray observations of the Cassiopeia A supernova remnant taken in 2000, 2002, and 2004 with the Chandra ACIS-S3 reveals the presence of several small scale features (<= 10 arcsec) which exhibit significant intensity changes over a 4 year time frame. Here we report on the variability of six features, four of which show count rate increases from ~ 10% to over 90%, and two which show decreases of ~ 30% -- 40%. While extracted 1-4.5 keV X-ray spectra do not reveal gross changes in emission line strengths, spectral fits using non-equilibrium ionization, metal-rich plasma models indi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0609412","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/astro-ph/0609412/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":"2026-07-04T15:25:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XBwInYYcAbBrtt9hl2Foa44f/KelAvrrMfV/z6JwgZHzb1HQpSuNBscYVciNAXo7dV4E/UVCg5H7sjVGnZFDDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T19:34:43.824717Z"},"content_sha256":"c6a09cb1f34967e3716ca24384f56614781c44d0b1398b6cddb3672b94888716","schema_version":"1.0","event_id":"sha256:c6a09cb1f34967e3716ca24384f56614781c44d0b1398b6cddb3672b94888716"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CIEXY3VH5M3ZM3YJH77BT56ZYM/bundle.json","state_url":"https://pith.science/pith/CIEXY3VH5M3ZM3YJH77BT56ZYM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CIEXY3VH5M3ZM3YJH77BT56ZYM/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":"2026-08-09T19:34:43Z","links":{"resolver":"https://pith.science/pith/CIEXY3VH5M3ZM3YJH77BT56ZYM","bundle":"https://pith.science/pith/CIEXY3VH5M3ZM3YJH77BT56ZYM/bundle.json","state":"https://pith.science/pith/CIEXY3VH5M3ZM3YJH77BT56ZYM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CIEXY3VH5M3ZM3YJH77BT56ZYM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2006:CIEXY3VH5M3ZM3YJH77BT56ZYM","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":"23853fef59827d94b51c728afc27286703086e0203c5376c4802b56650cd0920","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-09-14T16:02:18Z","title_canon_sha256":"5e9b0442612029cb4bc47ff96c5beb02f7469d3fd58f2d0a0de9e39fd77df985"},"schema_version":"1.0","source":{"id":"astro-ph/0609412","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0609412","created_at":"2026-07-04T15:25:54Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0609412v1","created_at":"2026-07-04T15:25:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0609412","created_at":"2026-07-04T15:25:54Z"},{"alias_kind":"pith_short_12","alias_value":"CIEXY3VH5M3Z","created_at":"2026-07-04T15:25:54Z"},{"alias_kind":"pith_short_16","alias_value":"CIEXY3VH5M3ZM3YJ","created_at":"2026-07-04T15:25:54Z"},{"alias_kind":"pith_short_8","alias_value":"CIEXY3VH","created_at":"2026-07-04T15:25:54Z"}],"graph_snapshots":[{"event_id":"sha256:c6a09cb1f34967e3716ca24384f56614781c44d0b1398b6cddb3672b94888716","target":"graph","created_at":"2026-07-04T15:25:54Z","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/astro-ph/0609412/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"A comparison of X-ray observations of the Cassiopeia A supernova remnant taken in 2000, 2002, and 2004 with the Chandra ACIS-S3 reveals the presence of several small scale features (<= 10 arcsec) which exhibit significant intensity changes over a 4 year time frame. Here we report on the variability of six features, four of which show count rate increases from ~ 10% to over 90%, and two which show decreases of ~ 30% -- 40%. While extracted 1-4.5 keV X-ray spectra do not reveal gross changes in emission line strengths, spectral fits using non-equilibrium ionization, metal-rich plasma models indi","authors_text":"D. J. Patnaude, R. A. Fesen","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2006-09-14T16:02:18Z","title":"Small-Scale X-ray Variability in the Cassiopeia A Supernova Remnant"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0609412","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:f91f13a2c3fea26454eacb14aa912b2c1655c2dae44ff78b4fd480b61c6ac1aa","target":"record","created_at":"2026-07-04T15:25:54Z","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":"23853fef59827d94b51c728afc27286703086e0203c5376c4802b56650cd0920","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-09-14T16:02:18Z","title_canon_sha256":"5e9b0442612029cb4bc47ff96c5beb02f7469d3fd58f2d0a0de9e39fd77df985"},"schema_version":"1.0","source":{"id":"astro-ph/0609412","kind":"arxiv","version":1}},"canonical_sha256":"12097c6ea7eb37966f093ffe19f7d9c30713a5465e07cd7308ba5962f492d5d9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"12097c6ea7eb37966f093ffe19f7d9c30713a5465e07cd7308ba5962f492d5d9","first_computed_at":"2026-07-04T15:25:54.405072Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:25:54.405072Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"B3x4VzSWRRoWGKI+xikc0x59B31ynpwiEe4qfDMqDE95BAd9VH0ouJkS+zyfpfssHzdwRZ0kZK4LnxKW4JHMCA==","signature_status":"signed_v1","signed_at":"2026-07-04T15:25:54.405576Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0609412","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f91f13a2c3fea26454eacb14aa912b2c1655c2dae44ff78b4fd480b61c6ac1aa","sha256:c6a09cb1f34967e3716ca24384f56614781c44d0b1398b6cddb3672b94888716"],"state_sha256":"562f2b208f2a77b09e598f3dd5151c7747b808725d5bd06c134e2eac0af9a9d5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZO8Y9AG91TMlrbp4e65GgmIflnOUQ+cb9wF7c9m/xu7N6P7zpTKyAwR/3d5xC64bUMzHK/tFcyaynXgit5oUBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-09T19:34:43.830076Z","bundle_sha256":"7e36f1924a9b98c13052bc08e08f32425e2a0f6effd1e7ca54bee7dfd6d720dc"}}