{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:NXMXDAIGRAZICQ5E4K4ZLTHF5H","short_pith_number":"pith:NXMXDAIG","canonical_record":{"source":{"id":"1712.04450","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-12-12T19:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"d034ab94786a0ff410cb3ea00b83825ef1f14b5f224c306a5aeb23da8d6d7073","abstract_canon_sha256":"91507492971bc9043ad05bb688fc2881b728f0624c93b5ae40226af886abad4c"},"schema_version":"1.0"},"canonical_sha256":"6dd971810688328143a4e2b995cce5e9dc255f0f57e043144a459bc28cf6a227","source":{"kind":"arxiv","id":"1712.04450","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1712.04450","created_at":"2026-05-18T00:18:14Z"},{"alias_kind":"arxiv_version","alias_value":"1712.04450v2","created_at":"2026-05-18T00:18:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1712.04450","created_at":"2026-05-18T00:18:14Z"},{"alias_kind":"pith_short_12","alias_value":"NXMXDAIGRAZI","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_16","alias_value":"NXMXDAIGRAZICQ5E","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_8","alias_value":"NXMXDAIG","created_at":"2026-05-18T12:31:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:NXMXDAIGRAZICQ5E4K4ZLTHF5H","target":"record","payload":{"canonical_record":{"source":{"id":"1712.04450","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-12-12T19:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"d034ab94786a0ff410cb3ea00b83825ef1f14b5f224c306a5aeb23da8d6d7073","abstract_canon_sha256":"91507492971bc9043ad05bb688fc2881b728f0624c93b5ae40226af886abad4c"},"schema_version":"1.0"},"canonical_sha256":"6dd971810688328143a4e2b995cce5e9dc255f0f57e043144a459bc28cf6a227","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:18:14.610959Z","signature_b64":"/TSjka2MJdEoz3R8P15s9JNd/nJFAF8lvVeBBSP/l//77Lp2nBe4DLtt2P2CU7+blclP8mLelFh1J2dZyhK3Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6dd971810688328143a4e2b995cce5e9dc255f0f57e043144a459bc28cf6a227","last_reissued_at":"2026-05-18T00:18:14.610473Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:18:14.610473Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1712.04450","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:18:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"V4+jL8alcV+SfzWeB6PVDznH1At41L9FX2SQrIGGV9m+GYT2xb5eNTQc4EAK7hzEm3h9FRTjUcDip+lyx+fbCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T23:29:43.707380Z"},"content_sha256":"f7d671b47a08245538169773cc9f4593c8895485f9182ab5955aab3d1437416f","schema_version":"1.0","event_id":"sha256:f7d671b47a08245538169773cc9f4593c8895485f9182ab5955aab3d1437416f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:NXMXDAIGRAZICQ5E4K4ZLTHF5H","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On the Origin of Diffuse Ionized Gas in the Antennae Galaxy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"(2) Instituto de Astrof\\'isica de Canarias (IAC), 3), (3) Universidad de La Laguna, (4) CRAL, 5), (5) Observatoire de Gen\\`eve, (6) Institut f\\\"ur Astrophysik G\\\"ottingen, (7) ETH Z\\\"urich, (8) Leiden Observatory, 9), (9) Universit\\\"at Potsdam), Ana Monreal-Ibero (2, Anne Verhamme (4, Christer Sandin (1), Davor Krajnovi\\'c (1), Johan Richard (4), Lutz Wisotzki (1) ((1) Leibniz-Institut f\\\"ur Astrophysik Potsdam (AIP), Martin M. Roth (1), Martin Wendt (1, Matthias Steinmetz (1), Michael V. Maseda (8), Peter M. Weilbacher (1), Raffaella Anna Marino (7), Roland Bacon (4), Santiago Erroz-Ferrer (7), Sebastian Kamann (6), Stefan Dreizler (6), Univ Lyon 1, Wolfram Kollatschny (6)","submitted_at":"2017-12-12T19:00:01Z","abstract_excerpt":"The \"Antennae Galaxy\" (NGC 4038/39) is the closest major interacting galaxy system and therefore often taken as merger prototype. We present the first comprehensive integral field spectroscopic dataset of this system, observed with the MUSE instrument at the ESO VLT. We cover the two regions in this system which exhibit recent star-formation: the central galaxy interaction and a region near the tip of the southern tidal tail. In these fields, we detect HII regions and diffuse ionized gas to unprecedented depth. About 15% of the ionized gas was undetected by previous observing campaigns. This n"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1712.04450","kind":"arxiv","version":2},"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":"2026-05-18T00:18:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0+4NYeV8TifFC581bxhqVGd55wvR0hp0BT7N6doknUH2OkEvqVSK4cXHQ4kS9qy2O/tuKerXsgPdqpukYuUsCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T23:29:43.708036Z"},"content_sha256":"8a27d42922331be5c593fa31b88e368bdb8b38be4ff511642f85dea0f7c707ff","schema_version":"1.0","event_id":"sha256:8a27d42922331be5c593fa31b88e368bdb8b38be4ff511642f85dea0f7c707ff"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NXMXDAIGRAZICQ5E4K4ZLTHF5H/bundle.json","state_url":"https://pith.science/pith/NXMXDAIGRAZICQ5E4K4ZLTHF5H/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NXMXDAIGRAZICQ5E4K4ZLTHF5H/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":"2026-05-25T23:29:43Z","links":{"resolver":"https://pith.science/pith/NXMXDAIGRAZICQ5E4K4ZLTHF5H","bundle":"https://pith.science/pith/NXMXDAIGRAZICQ5E4K4ZLTHF5H/bundle.json","state":"https://pith.science/pith/NXMXDAIGRAZICQ5E4K4ZLTHF5H/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NXMXDAIGRAZICQ5E4K4ZLTHF5H/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:NXMXDAIGRAZICQ5E4K4ZLTHF5H","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":"91507492971bc9043ad05bb688fc2881b728f0624c93b5ae40226af886abad4c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-12-12T19:00:01Z","title_canon_sha256":"d034ab94786a0ff410cb3ea00b83825ef1f14b5f224c306a5aeb23da8d6d7073"},"schema_version":"1.0","source":{"id":"1712.04450","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1712.04450","created_at":"2026-05-18T00:18:14Z"},{"alias_kind":"arxiv_version","alias_value":"1712.04450v2","created_at":"2026-05-18T00:18:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1712.04450","created_at":"2026-05-18T00:18:14Z"},{"alias_kind":"pith_short_12","alias_value":"NXMXDAIGRAZI","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_16","alias_value":"NXMXDAIGRAZICQ5E","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_8","alias_value":"NXMXDAIG","created_at":"2026-05-18T12:31:34Z"}],"graph_snapshots":[{"event_id":"sha256:8a27d42922331be5c593fa31b88e368bdb8b38be4ff511642f85dea0f7c707ff","target":"graph","created_at":"2026-05-18T00:18:14Z","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"},"paper":{"abstract_excerpt":"The \"Antennae Galaxy\" (NGC 4038/39) is the closest major interacting galaxy system and therefore often taken as merger prototype. We present the first comprehensive integral field spectroscopic dataset of this system, observed with the MUSE instrument at the ESO VLT. We cover the two regions in this system which exhibit recent star-formation: the central galaxy interaction and a region near the tip of the southern tidal tail. In these fields, we detect HII regions and diffuse ionized gas to unprecedented depth. About 15% of the ionized gas was undetected by previous observing campaigns. This n","authors_text":"(2) Instituto de Astrof\\'isica de Canarias (IAC), 3), (3) Universidad de La Laguna, (4) CRAL, 5), (5) Observatoire de Gen\\`eve, (6) Institut f\\\"ur Astrophysik G\\\"ottingen, (7) ETH Z\\\"urich, (8) Leiden Observatory, 9), (9) Universit\\\"at Potsdam), Ana Monreal-Ibero (2, Anne Verhamme (4, Christer Sandin (1), Davor Krajnovi\\'c (1), Johan Richard (4), Lutz Wisotzki (1) ((1) Leibniz-Institut f\\\"ur Astrophysik Potsdam (AIP), Martin M. Roth (1), Martin Wendt (1, Matthias Steinmetz (1), Michael V. Maseda (8), Peter M. Weilbacher (1), Raffaella Anna Marino (7), Roland Bacon (4), Santiago Erroz-Ferrer (7), Sebastian Kamann (6), Stefan Dreizler (6), Univ Lyon 1, Wolfram Kollatschny (6)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-12-12T19:00:01Z","title":"On the Origin of Diffuse Ionized Gas in the Antennae Galaxy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1712.04450","kind":"arxiv","version":2},"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:f7d671b47a08245538169773cc9f4593c8895485f9182ab5955aab3d1437416f","target":"record","created_at":"2026-05-18T00:18:14Z","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":"91507492971bc9043ad05bb688fc2881b728f0624c93b5ae40226af886abad4c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-12-12T19:00:01Z","title_canon_sha256":"d034ab94786a0ff410cb3ea00b83825ef1f14b5f224c306a5aeb23da8d6d7073"},"schema_version":"1.0","source":{"id":"1712.04450","kind":"arxiv","version":2}},"canonical_sha256":"6dd971810688328143a4e2b995cce5e9dc255f0f57e043144a459bc28cf6a227","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6dd971810688328143a4e2b995cce5e9dc255f0f57e043144a459bc28cf6a227","first_computed_at":"2026-05-18T00:18:14.610473Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:18:14.610473Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/TSjka2MJdEoz3R8P15s9JNd/nJFAF8lvVeBBSP/l//77Lp2nBe4DLtt2P2CU7+blclP8mLelFh1J2dZyhK3Bg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:18:14.610959Z","signed_message":"canonical_sha256_bytes"},"source_id":"1712.04450","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f7d671b47a08245538169773cc9f4593c8895485f9182ab5955aab3d1437416f","sha256:8a27d42922331be5c593fa31b88e368bdb8b38be4ff511642f85dea0f7c707ff"],"state_sha256":"5e658c40515f4e94f3d64ebc050d0c605ae0bf59f947e2aad1d7971513fcd501"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mJ2c7BsPH2Jcc/O09gghU+XWIro7o+1M9q7y5qPJD+/AofdJyke3RtyuIHZtPU3mXASgzZIk1KzsWwcqM9lpBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T23:29:43.711149Z","bundle_sha256":"d52a01d911d444b7f4cbfc8bf69c4b4f1d3c8a40163903a1f4e187cf43c4674a"}}