{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:XZPPMA63LFIQL6MIORTEIWOFOJ","short_pith_number":"pith:XZPPMA63","canonical_record":{"source":{"id":"1610.01598","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-10-05T20:00:01Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"24c7cd50b7ecb9c54d9ef950cf27f9af71a01ad8c224cd01a10aa8b425abb3d6","abstract_canon_sha256":"0c96c9d7e1d93b28a183b065f3964a9d8388057eff59cea1d0b71a9477a40f6d"},"schema_version":"1.0"},"canonical_sha256":"be5ef603db595105f98874664459c572509c7ef48fae68d07ff6d2df6de954b5","source":{"kind":"arxiv","id":"1610.01598","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1610.01598","created_at":"2026-05-18T01:01:21Z"},{"alias_kind":"arxiv_version","alias_value":"1610.01598v1","created_at":"2026-05-18T01:01:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1610.01598","created_at":"2026-05-18T01:01:21Z"},{"alias_kind":"pith_short_12","alias_value":"XZPPMA63LFIQ","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_16","alias_value":"XZPPMA63LFIQL6MI","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_8","alias_value":"XZPPMA63","created_at":"2026-05-18T12:30:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:XZPPMA63LFIQL6MIORTEIWOFOJ","target":"record","payload":{"canonical_record":{"source":{"id":"1610.01598","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-10-05T20:00:01Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"24c7cd50b7ecb9c54d9ef950cf27f9af71a01ad8c224cd01a10aa8b425abb3d6","abstract_canon_sha256":"0c96c9d7e1d93b28a183b065f3964a9d8388057eff59cea1d0b71a9477a40f6d"},"schema_version":"1.0"},"canonical_sha256":"be5ef603db595105f98874664459c572509c7ef48fae68d07ff6d2df6de954b5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:01:21.895030Z","signature_b64":"gjCp5ATa8fZz1NUEvo7OJLWc+zF/O2Dyr/GZOYqj36V+E7c/H5n+nhBTETJb3Kgsqxnv1tz3Ka/d1NJhD5cVAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"be5ef603db595105f98874664459c572509c7ef48fae68d07ff6d2df6de954b5","last_reissued_at":"2026-05-18T01:01:21.894510Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:01:21.894510Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1610.01598","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":"2026-05-18T01:01:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"j5AO0g3GucfKC3UojuHUTNds8gRXZVNwU9yRc8pcBxLN9dNV/eHjE2oYmpuxSjFp2tOblmku1GEnEPcjRwX5DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T07:11:03.495727Z"},"content_sha256":"0084ef4e3f2b4a805b5f8934015194d751238b015398e92e82800a0b530426d3","schema_version":"1.0","event_id":"sha256:0084ef4e3f2b4a805b5f8934015194d751238b015398e92e82800a0b530426d3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:XZPPMA63LFIQL6MIORTEIWOFOJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Deep Chandra Observations of the Compact Starburst Galaxy Henize 2-10: X-rays from the Massive Black Hole","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.HE","authors_text":"Amy Reines, Gregory Sivakoff, Jenny Greene, Jon Miller, Kelsey Johnson, Mark Reynolds, Ryan Hickox","submitted_at":"2016-10-05T20:00:01Z","abstract_excerpt":"We present follow-up X-ray observations of the candidate massive black hole (BH) in the nucleus of the low-mass, compact starburst galaxy Henize 2-10. Using new high-resolution observations from the Chandra X-ray Observatory totaling 200 ks in duration, as well as archival Chandra observations from 2001, we demonstrate the presence of a previously unidentified X-ray point source that is spatially coincident with the known nuclear radio source in Henize 2-10 (i.e., the massive BH). We show that the hard X-ray emission previously identified in the 2001 observation is dominated by a source that i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1610.01598","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":"2026-05-18T01:01:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zSPuMIHZqC7fZimNBlAbYORbRBkIhDFwX9oSZkq1lUUEJj6ZHJab51k3gjjF+vSCN7Z0N2vjI0g81OpotFyDBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T07:11:03.496475Z"},"content_sha256":"f71c9351a1812fbf70b47b842938268619072acc047bb6e60890b9e3cc8a4371","schema_version":"1.0","event_id":"sha256:f71c9351a1812fbf70b47b842938268619072acc047bb6e60890b9e3cc8a4371"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XZPPMA63LFIQL6MIORTEIWOFOJ/bundle.json","state_url":"https://pith.science/pith/XZPPMA63LFIQL6MIORTEIWOFOJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XZPPMA63LFIQL6MIORTEIWOFOJ/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":"2026-05-27T07:11:03Z","links":{"resolver":"https://pith.science/pith/XZPPMA63LFIQL6MIORTEIWOFOJ","bundle":"https://pith.science/pith/XZPPMA63LFIQL6MIORTEIWOFOJ/bundle.json","state":"https://pith.science/pith/XZPPMA63LFIQL6MIORTEIWOFOJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XZPPMA63LFIQL6MIORTEIWOFOJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:XZPPMA63LFIQL6MIORTEIWOFOJ","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":"0c96c9d7e1d93b28a183b065f3964a9d8388057eff59cea1d0b71a9477a40f6d","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-10-05T20:00:01Z","title_canon_sha256":"24c7cd50b7ecb9c54d9ef950cf27f9af71a01ad8c224cd01a10aa8b425abb3d6"},"schema_version":"1.0","source":{"id":"1610.01598","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1610.01598","created_at":"2026-05-18T01:01:21Z"},{"alias_kind":"arxiv_version","alias_value":"1610.01598v1","created_at":"2026-05-18T01:01:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1610.01598","created_at":"2026-05-18T01:01:21Z"},{"alias_kind":"pith_short_12","alias_value":"XZPPMA63LFIQ","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_16","alias_value":"XZPPMA63LFIQL6MI","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_8","alias_value":"XZPPMA63","created_at":"2026-05-18T12:30:51Z"}],"graph_snapshots":[{"event_id":"sha256:f71c9351a1812fbf70b47b842938268619072acc047bb6e60890b9e3cc8a4371","target":"graph","created_at":"2026-05-18T01:01:21Z","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 follow-up X-ray observations of the candidate massive black hole (BH) in the nucleus of the low-mass, compact starburst galaxy Henize 2-10. Using new high-resolution observations from the Chandra X-ray Observatory totaling 200 ks in duration, as well as archival Chandra observations from 2001, we demonstrate the presence of a previously unidentified X-ray point source that is spatially coincident with the known nuclear radio source in Henize 2-10 (i.e., the massive BH). We show that the hard X-ray emission previously identified in the 2001 observation is dominated by a source that i","authors_text":"Amy Reines, Gregory Sivakoff, Jenny Greene, Jon Miller, Kelsey Johnson, Mark Reynolds, Ryan Hickox","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-10-05T20:00:01Z","title":"Deep Chandra Observations of the Compact Starburst Galaxy Henize 2-10: X-rays from the Massive Black Hole"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1610.01598","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":"sha256:0084ef4e3f2b4a805b5f8934015194d751238b015398e92e82800a0b530426d3","target":"record","created_at":"2026-05-18T01:01:21Z","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":"0c96c9d7e1d93b28a183b065f3964a9d8388057eff59cea1d0b71a9477a40f6d","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-10-05T20:00:01Z","title_canon_sha256":"24c7cd50b7ecb9c54d9ef950cf27f9af71a01ad8c224cd01a10aa8b425abb3d6"},"schema_version":"1.0","source":{"id":"1610.01598","kind":"arxiv","version":1}},"canonical_sha256":"be5ef603db595105f98874664459c572509c7ef48fae68d07ff6d2df6de954b5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"be5ef603db595105f98874664459c572509c7ef48fae68d07ff6d2df6de954b5","first_computed_at":"2026-05-18T01:01:21.894510Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:01:21.894510Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gjCp5ATa8fZz1NUEvo7OJLWc+zF/O2Dyr/GZOYqj36V+E7c/H5n+nhBTETJb3Kgsqxnv1tz3Ka/d1NJhD5cVAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:01:21.895030Z","signed_message":"canonical_sha256_bytes"},"source_id":"1610.01598","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0084ef4e3f2b4a805b5f8934015194d751238b015398e92e82800a0b530426d3","sha256:f71c9351a1812fbf70b47b842938268619072acc047bb6e60890b9e3cc8a4371"],"state_sha256":"1c1d71378ffaf3eedb18d749547f403be31f149fb1d1537bbe48bd5b9c8d9ddd"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Y1F5dad28MWGcTPvuPRUw+0qFFjRaTG7aHVFv5mzW1fzR92UmssAMYFQ1vn9vckIfLvGX+if/dxiZucWPQwMAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T07:11:03.499896Z","bundle_sha256":"61a0e321adeae1b822a0654d19aafc1b416c20bc1fbbec1263ed48ad4de1a9f1"}}