{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:X3IFQL4TI33UUGDE5LBWB7OFKC","short_pith_number":"pith:X3IFQL4T","canonical_record":{"source":{"id":"0909.2942","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-09-16T07:35:27Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"65f2089d4c23af3125594d6078e7d3f232bb8c96b2ecb0d95120f1d49ccccea0","abstract_canon_sha256":"4cdb62bc76b0dc77b732cf78d2beeba0978c50113ebc798c4b26cb4d664671e2"},"schema_version":"1.0"},"canonical_sha256":"bed0582f9346f74a1864eac360fdc550bc5ff047fe6a5f46a88b515baed09d8c","source":{"kind":"arxiv","id":"0909.2942","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.2942","created_at":"2026-05-18T02:11:47Z"},{"alias_kind":"arxiv_version","alias_value":"0909.2942v1","created_at":"2026-05-18T02:11:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.2942","created_at":"2026-05-18T02:11:47Z"},{"alias_kind":"pith_short_12","alias_value":"X3IFQL4TI33U","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"X3IFQL4TI33UUGDE","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"X3IFQL4T","created_at":"2026-05-18T12:26:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:X3IFQL4TI33UUGDE5LBWB7OFKC","target":"record","payload":{"canonical_record":{"source":{"id":"0909.2942","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-09-16T07:35:27Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"65f2089d4c23af3125594d6078e7d3f232bb8c96b2ecb0d95120f1d49ccccea0","abstract_canon_sha256":"4cdb62bc76b0dc77b732cf78d2beeba0978c50113ebc798c4b26cb4d664671e2"},"schema_version":"1.0"},"canonical_sha256":"bed0582f9346f74a1864eac360fdc550bc5ff047fe6a5f46a88b515baed09d8c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:11:47.458679Z","signature_b64":"TsuVSGeEC3XLrShkbASeuzF37Skx5FYHi/vo286+CMu5ygM6ovjU0sKn8/cTRky8JY7b47y1N28SO5dNx9xUDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bed0582f9346f74a1864eac360fdc550bc5ff047fe6a5f46a88b515baed09d8c","last_reissued_at":"2026-05-18T02:11:47.457971Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:11:47.457971Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0909.2942","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":"2026-05-18T02:11:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7EwxGWHZfHcfOjR1cR2DGeojkIXwEuFOJBQoxbc2xT51XKUeCuRTJXQYiIcJrrFnPWuYaiYVaBlFCD9TwPk8DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T23:58:46.520297Z"},"content_sha256":"ddb007304feeafa0e325b510d7cfe4d18768f6211911d6cc09b8798748eaec14","schema_version":"1.0","event_id":"sha256:ddb007304feeafa0e325b510d7cfe4d18768f6211911d6cc09b8798748eaec14"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:X3IFQL4TI33UUGDE5LBWB7OFKC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The unusual X-ray morphology of NGC4636 revealed by deep Chandra observations: cavities and shocks created by past AGN outbursts","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.CO","authors_text":"2), (2) INAF-Osservatorio Astronomico di Bologna, (3) Max-Planck-Institut fur Astrophysik), A. Baldi (1, C. Jones (1), E. Churazov (3), L. David (1), P. Nulsen (1), R. Kraft (1), S.Giacintucci (1) ((1) Harvard-Smithsonian Center for Astrophysics, W. Forman (1)","submitted_at":"2009-09-16T07:35:27Z","abstract_excerpt":"We present Chandra ACIS-I and ACIS-S observations ($\\sim$200 ks in total) of the X-ray luminous elliptical galaxy NGC 4636, located in the outskirts of the Virgo cluster. A soft band (0.5-2 keV) image shows the presence of a bright core in the center surrounded by an extended X-ray corona and two pronounced quasi-symmetric, 8 kpc long, arm-like features. Each of this features defines the rimof an ellipsoidal bubble. An additional bubble-like feature, whose northern rim is located $\\sim2$ kpc south of the north-eastern arm, is detected as well. We present surface brightness and temperature prof"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.2942","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":""},"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":"2026-05-18T02:11:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8z71W9vpI0W7NlmFM6JgUDjxzLBeMqV/77AleNMQMx5VwwB3+AO9LFbIaxc6aU5ggcgY0IBB56N1Pz41xl/1Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T23:58:46.521026Z"},"content_sha256":"7c2c6ddaddaf3ddba0898835f2a220723dfe6b31dfb0bd7f75e489a3fdcf327f","schema_version":"1.0","event_id":"sha256:7c2c6ddaddaf3ddba0898835f2a220723dfe6b31dfb0bd7f75e489a3fdcf327f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/X3IFQL4TI33UUGDE5LBWB7OFKC/bundle.json","state_url":"https://pith.science/pith/X3IFQL4TI33UUGDE5LBWB7OFKC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/X3IFQL4TI33UUGDE5LBWB7OFKC/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":"2026-05-25T23:58:46Z","links":{"resolver":"https://pith.science/pith/X3IFQL4TI33UUGDE5LBWB7OFKC","bundle":"https://pith.science/pith/X3IFQL4TI33UUGDE5LBWB7OFKC/bundle.json","state":"https://pith.science/pith/X3IFQL4TI33UUGDE5LBWB7OFKC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/X3IFQL4TI33UUGDE5LBWB7OFKC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:X3IFQL4TI33UUGDE5LBWB7OFKC","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":"4cdb62bc76b0dc77b732cf78d2beeba0978c50113ebc798c4b26cb4d664671e2","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-09-16T07:35:27Z","title_canon_sha256":"65f2089d4c23af3125594d6078e7d3f232bb8c96b2ecb0d95120f1d49ccccea0"},"schema_version":"1.0","source":{"id":"0909.2942","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.2942","created_at":"2026-05-18T02:11:47Z"},{"alias_kind":"arxiv_version","alias_value":"0909.2942v1","created_at":"2026-05-18T02:11:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.2942","created_at":"2026-05-18T02:11:47Z"},{"alias_kind":"pith_short_12","alias_value":"X3IFQL4TI33U","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"X3IFQL4TI33UUGDE","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"X3IFQL4T","created_at":"2026-05-18T12:26:02Z"}],"graph_snapshots":[{"event_id":"sha256:7c2c6ddaddaf3ddba0898835f2a220723dfe6b31dfb0bd7f75e489a3fdcf327f","target":"graph","created_at":"2026-05-18T02:11:47Z","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 present Chandra ACIS-I and ACIS-S observations ($\\sim$200 ks in total) of the X-ray luminous elliptical galaxy NGC 4636, located in the outskirts of the Virgo cluster. A soft band (0.5-2 keV) image shows the presence of a bright core in the center surrounded by an extended X-ray corona and two pronounced quasi-symmetric, 8 kpc long, arm-like features. Each of this features defines the rimof an ellipsoidal bubble. An additional bubble-like feature, whose northern rim is located $\\sim2$ kpc south of the north-eastern arm, is detected as well. We present surface brightness and temperature prof","authors_text":"2), (2) INAF-Osservatorio Astronomico di Bologna, (3) Max-Planck-Institut fur Astrophysik), A. Baldi (1, C. Jones (1), E. Churazov (3), L. David (1), P. Nulsen (1), R. Kraft (1), S.Giacintucci (1) ((1) Harvard-Smithsonian Center for Astrophysics, W. Forman (1)","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-09-16T07:35:27Z","title":"The unusual X-ray morphology of NGC4636 revealed by deep Chandra observations: cavities and shocks created by past AGN outbursts"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.2942","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:ddb007304feeafa0e325b510d7cfe4d18768f6211911d6cc09b8798748eaec14","target":"record","created_at":"2026-05-18T02:11:47Z","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":"4cdb62bc76b0dc77b732cf78d2beeba0978c50113ebc798c4b26cb4d664671e2","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-09-16T07:35:27Z","title_canon_sha256":"65f2089d4c23af3125594d6078e7d3f232bb8c96b2ecb0d95120f1d49ccccea0"},"schema_version":"1.0","source":{"id":"0909.2942","kind":"arxiv","version":1}},"canonical_sha256":"bed0582f9346f74a1864eac360fdc550bc5ff047fe6a5f46a88b515baed09d8c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bed0582f9346f74a1864eac360fdc550bc5ff047fe6a5f46a88b515baed09d8c","first_computed_at":"2026-05-18T02:11:47.457971Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:11:47.457971Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TsuVSGeEC3XLrShkbASeuzF37Skx5FYHi/vo286+CMu5ygM6ovjU0sKn8/cTRky8JY7b47y1N28SO5dNx9xUDg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:11:47.458679Z","signed_message":"canonical_sha256_bytes"},"source_id":"0909.2942","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ddb007304feeafa0e325b510d7cfe4d18768f6211911d6cc09b8798748eaec14","sha256:7c2c6ddaddaf3ddba0898835f2a220723dfe6b31dfb0bd7f75e489a3fdcf327f"],"state_sha256":"7c30291194471cb6c93a52a26f54d21393f5bd1d4dd09b3d8e4d96abb23a5f13"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jfE9YfKFhuURw5cBNv0o8Efc27ec+kvj9y01fwI9+8SnT+qgcagsJnNAE+7+ONU/cuZJwydEJvKxS9gl/q+DDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T23:58:46.524919Z","bundle_sha256":"d33b457892b1a4c8fb9dc8cbbe6eb42e8f08d8a5564832a5b4f16b5543989ea1"}}