{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:RZP3OSDJUPNAFV74PS2WO4WAXB","short_pith_number":"pith:RZP3OSDJ","canonical_record":{"source":{"id":"1603.08506","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-03-28T19:54:01Z","cross_cats_sorted":[],"title_canon_sha256":"4a3cb0c59dd3d5ea6bf1066b22b0d5b96397ecc53a64ab875bd4b8cd77316baf","abstract_canon_sha256":"161eee612918c90eb404621045a66485929a3d1503566c741e38e65164deb17f"},"schema_version":"1.0"},"canonical_sha256":"8e5fb74869a3da02d7fc7cb56772c0b8768a72726790e0595da360a0fa97b6c4","source":{"kind":"arxiv","id":"1603.08506","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1603.08506","created_at":"2026-05-18T01:14:43Z"},{"alias_kind":"arxiv_version","alias_value":"1603.08506v1","created_at":"2026-05-18T01:14:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.08506","created_at":"2026-05-18T01:14:43Z"},{"alias_kind":"pith_short_12","alias_value":"RZP3OSDJUPNA","created_at":"2026-05-18T12:30:41Z"},{"alias_kind":"pith_short_16","alias_value":"RZP3OSDJUPNAFV74","created_at":"2026-05-18T12:30:41Z"},{"alias_kind":"pith_short_8","alias_value":"RZP3OSDJ","created_at":"2026-05-18T12:30:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:RZP3OSDJUPNAFV74PS2WO4WAXB","target":"record","payload":{"canonical_record":{"source":{"id":"1603.08506","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-03-28T19:54:01Z","cross_cats_sorted":[],"title_canon_sha256":"4a3cb0c59dd3d5ea6bf1066b22b0d5b96397ecc53a64ab875bd4b8cd77316baf","abstract_canon_sha256":"161eee612918c90eb404621045a66485929a3d1503566c741e38e65164deb17f"},"schema_version":"1.0"},"canonical_sha256":"8e5fb74869a3da02d7fc7cb56772c0b8768a72726790e0595da360a0fa97b6c4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:14:43.642227Z","signature_b64":"3DZT+DjqImdg7LNL1jbj6coHeiIFXbjySAHnNUtM8n3GJKNMw0v/YNskx62QdSrSSVY4xE16I6QxEwftHFzyDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8e5fb74869a3da02d7fc7cb56772c0b8768a72726790e0595da360a0fa97b6c4","last_reissued_at":"2026-05-18T01:14:43.641504Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:14:43.641504Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1603.08506","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":"2026-05-18T01:14:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+xfgdsDVhSPuNMCGJYinp8fblYhJTYWQWYoKL8LAgwpaP7D44/XGlZRxi1Di1sCe0MSL8XOwzsmRYQ6+U/iTCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T15:35:56.533971Z"},"content_sha256":"03ea1e3be545ece8f8ef99b1990224fa818f8d1577310a17c607b0caafff587c","schema_version":"1.0","event_id":"sha256:03ea1e3be545ece8f8ef99b1990224fa818f8d1577310a17c607b0caafff587c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:RZP3OSDJUPNAFV74PS2WO4WAXB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Feature-tailored spectroscopic analysis of the SNR Puppis A in X-rays","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"(2) XMM-Newton Science Operations Centre, 3), (3) Telespazio Vega U.K. S.L. (4) FADU, 4), E. Giacani (1, ESAC, G. Castelletti (1) ((1) Instituto de Astronom\\'ia y F\\'isica del Espacio (IAFE), G. Dubner (1), G. J. M. Luna (1), M. J. S. Smith (2, University of Buenos Aires), Villafranca del Castillo","submitted_at":"2016-03-28T19:54:01Z","abstract_excerpt":"We introduce a distinct method to perform spatially-resolved spectral analysis of astronomical sources with highly structured X-ray emission. The method measures the surface brightness of neighbouring pixels to adaptively size and shape each region, thus the spectra from the bright and faint filamentary structures evident in the broadband images can be extracted. As a test case, we present the spectral analysis of the complete X-ray emitting plasma in the supernova remnant Puppis A observed with XMM-Newton and Chandra. Given the angular size of Puppis A, many pointings with different observati"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.08506","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":"2026-05-18T01:14:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jRrP7GH7frxK+cj8dpwLsfb23Layt0PxsT1p+5viiDlZDpzkvEbqIZ5VKTxCXCOVXeHjciANguYNabSE0i/TBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T15:35:56.534338Z"},"content_sha256":"84a72782b71a59bc603a8dc6129673fc2cc9874474a40ce162aa8ae14347c615","schema_version":"1.0","event_id":"sha256:84a72782b71a59bc603a8dc6129673fc2cc9874474a40ce162aa8ae14347c615"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RZP3OSDJUPNAFV74PS2WO4WAXB/bundle.json","state_url":"https://pith.science/pith/RZP3OSDJUPNAFV74PS2WO4WAXB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RZP3OSDJUPNAFV74PS2WO4WAXB/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":"2026-06-02T15:35:56Z","links":{"resolver":"https://pith.science/pith/RZP3OSDJUPNAFV74PS2WO4WAXB","bundle":"https://pith.science/pith/RZP3OSDJUPNAFV74PS2WO4WAXB/bundle.json","state":"https://pith.science/pith/RZP3OSDJUPNAFV74PS2WO4WAXB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RZP3OSDJUPNAFV74PS2WO4WAXB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:RZP3OSDJUPNAFV74PS2WO4WAXB","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":"161eee612918c90eb404621045a66485929a3d1503566c741e38e65164deb17f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-03-28T19:54:01Z","title_canon_sha256":"4a3cb0c59dd3d5ea6bf1066b22b0d5b96397ecc53a64ab875bd4b8cd77316baf"},"schema_version":"1.0","source":{"id":"1603.08506","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1603.08506","created_at":"2026-05-18T01:14:43Z"},{"alias_kind":"arxiv_version","alias_value":"1603.08506v1","created_at":"2026-05-18T01:14:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.08506","created_at":"2026-05-18T01:14:43Z"},{"alias_kind":"pith_short_12","alias_value":"RZP3OSDJUPNA","created_at":"2026-05-18T12:30:41Z"},{"alias_kind":"pith_short_16","alias_value":"RZP3OSDJUPNAFV74","created_at":"2026-05-18T12:30:41Z"},{"alias_kind":"pith_short_8","alias_value":"RZP3OSDJ","created_at":"2026-05-18T12:30:41Z"}],"graph_snapshots":[{"event_id":"sha256:84a72782b71a59bc603a8dc6129673fc2cc9874474a40ce162aa8ae14347c615","target":"graph","created_at":"2026-05-18T01:14:43Z","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 introduce a distinct method to perform spatially-resolved spectral analysis of astronomical sources with highly structured X-ray emission. The method measures the surface brightness of neighbouring pixels to adaptively size and shape each region, thus the spectra from the bright and faint filamentary structures evident in the broadband images can be extracted. As a test case, we present the spectral analysis of the complete X-ray emitting plasma in the supernova remnant Puppis A observed with XMM-Newton and Chandra. Given the angular size of Puppis A, many pointings with different observati","authors_text":"(2) XMM-Newton Science Operations Centre, 3), (3) Telespazio Vega U.K. S.L. (4) FADU, 4), E. Giacani (1, ESAC, G. Castelletti (1) ((1) Instituto de Astronom\\'ia y F\\'isica del Espacio (IAFE), G. Dubner (1), G. J. M. Luna (1), M. J. S. Smith (2, University of Buenos Aires), Villafranca del Castillo","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-03-28T19:54:01Z","title":"Feature-tailored spectroscopic analysis of the SNR Puppis A in X-rays"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.08506","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":"sha256:03ea1e3be545ece8f8ef99b1990224fa818f8d1577310a17c607b0caafff587c","target":"record","created_at":"2026-05-18T01:14:43Z","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":"161eee612918c90eb404621045a66485929a3d1503566c741e38e65164deb17f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-03-28T19:54:01Z","title_canon_sha256":"4a3cb0c59dd3d5ea6bf1066b22b0d5b96397ecc53a64ab875bd4b8cd77316baf"},"schema_version":"1.0","source":{"id":"1603.08506","kind":"arxiv","version":1}},"canonical_sha256":"8e5fb74869a3da02d7fc7cb56772c0b8768a72726790e0595da360a0fa97b6c4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8e5fb74869a3da02d7fc7cb56772c0b8768a72726790e0595da360a0fa97b6c4","first_computed_at":"2026-05-18T01:14:43.641504Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:14:43.641504Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3DZT+DjqImdg7LNL1jbj6coHeiIFXbjySAHnNUtM8n3GJKNMw0v/YNskx62QdSrSSVY4xE16I6QxEwftHFzyDw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:14:43.642227Z","signed_message":"canonical_sha256_bytes"},"source_id":"1603.08506","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:03ea1e3be545ece8f8ef99b1990224fa818f8d1577310a17c607b0caafff587c","sha256:84a72782b71a59bc603a8dc6129673fc2cc9874474a40ce162aa8ae14347c615"],"state_sha256":"b982e2d92ee91dc89ae0f80af1cb38306172ce1694393cef063eefd34582cc52"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Qj4Z051+OdvFzqnZLp9izY8TfwGQMR/KzngQee+GGwoeIq3zuhds0h/2kanbqWsU92zIrD010XLAeUnROsg8Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T15:35:56.536368Z","bundle_sha256":"cf85464ffed50a66e7d584f00693a8f1262a5fb7f31602acff88dd1cdff9ff24"}}