{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:ZSQPLGAZPUDKQQRWA2ZRGPK5XL","short_pith_number":"pith:ZSQPLGAZ","canonical_record":{"source":{"id":"2303.09569","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-03-16T18:00:01Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"7e5c339cdf341a101972014bdabd5a2cc615cae281efc267748186af5d61933a","abstract_canon_sha256":"6f13a8e92640c79282e66958e1f9522b9bd424a347dc517a3fc137a454631f98"},"schema_version":"1.0"},"canonical_sha256":"cca0f598197d06a8423606b3133d5dbac2f3788e7e811dd47e1fdce9dedaed19","source":{"kind":"arxiv","id":"2303.09569","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2303.09569","created_at":"2026-07-05T06:56:21Z"},{"alias_kind":"arxiv_version","alias_value":"2303.09569v2","created_at":"2026-07-05T06:56:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2303.09569","created_at":"2026-07-05T06:56:21Z"},{"alias_kind":"pith_short_12","alias_value":"ZSQPLGAZPUDK","created_at":"2026-07-05T06:56:21Z"},{"alias_kind":"pith_short_16","alias_value":"ZSQPLGAZPUDKQQRW","created_at":"2026-07-05T06:56:21Z"},{"alias_kind":"pith_short_8","alias_value":"ZSQPLGAZ","created_at":"2026-07-05T06:56:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:ZSQPLGAZPUDKQQRWA2ZRGPK5XL","target":"record","payload":{"canonical_record":{"source":{"id":"2303.09569","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-03-16T18:00:01Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"7e5c339cdf341a101972014bdabd5a2cc615cae281efc267748186af5d61933a","abstract_canon_sha256":"6f13a8e92640c79282e66958e1f9522b9bd424a347dc517a3fc137a454631f98"},"schema_version":"1.0"},"canonical_sha256":"cca0f598197d06a8423606b3133d5dbac2f3788e7e811dd47e1fdce9dedaed19","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:56:21.180166Z","signature_b64":"p1AZnbVFsI1IqXborDw1qC+lCohrL/mrql1I6CJHQi3anLAapCrhdvKFkvEMiRi7h6MLWZ5TurNI0O+uEiMyBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cca0f598197d06a8423606b3133d5dbac2f3788e7e811dd47e1fdce9dedaed19","last_reissued_at":"2026-07-05T06:56:21.179674Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:56:21.179674Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2303.09569","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":"2026-07-05T06:56:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"h3lI25RZE+nRboEWitWa8KMMrT9vfAmNKTNbUGlRXRooOgaNgO1+wGTNTrddGWEaV6zxw+XRqFycmRY2M4eqBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T10:25:39.647975Z"},"content_sha256":"0d744bb1966662f0e27d9b5b159261022c1ac9838ea3fc639ac2d858d5c30bc3","schema_version":"1.0","event_id":"sha256:0d744bb1966662f0e27d9b5b159261022c1ac9838ea3fc639ac2d858d5c30bc3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:ZSQPLGAZPUDKQQRWA2ZRGPK5XL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Multimessenger study of merging massive black holes in the OBELISK simulation: gravitational waves, electromagnetic counterparts, and their link to galaxy and black hole populations","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.HE","authors_text":"A. Mangiagli, C. A. Dong-P\\'aez, M. Trebitsch, M. Volonteri, N. Webb, R. S. Beckmann, S. Vergani, Y. Dubois","submitted_at":"2023-03-16T18:00:01Z","abstract_excerpt":"Massive black-hole (BH) mergers are predicted to be powerful sources of low-frequency gravitational waves (GWs). Coupling the detection of GWs with an electromagnetic (EM) detection can provide key information about merging BHs and their environments. We study the high-resolution cosmological radiation-hydrodynamics simulation OBELISK, run to redshift $z=3.5$, to assess the GW and EM detectability of high-$z$ BH mergers, modelling spectral energy distribution and obscuration. For EM detectability, we further consider sub-grid dynamical delays in postprocessing. We find that most of the merger "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2303.09569","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2303.09569/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":"2026-07-05T06:56:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kYE8gAj+FUALiD5gU6Q9PSVHzCVVTBENIbL3nMK4LC+YhHytkpzC2tH09zdHWe+PMzIbcu/92BYILkcqf6zxAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T10:25:39.648475Z"},"content_sha256":"6ea7ea3dd17c085d7f588b41ba26de363812bb6826948cc621f7937aa646f6b8","schema_version":"1.0","event_id":"sha256:6ea7ea3dd17c085d7f588b41ba26de363812bb6826948cc621f7937aa646f6b8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZSQPLGAZPUDKQQRWA2ZRGPK5XL/bundle.json","state_url":"https://pith.science/pith/ZSQPLGAZPUDKQQRWA2ZRGPK5XL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZSQPLGAZPUDKQQRWA2ZRGPK5XL/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":"2026-08-01T10:25:39Z","links":{"resolver":"https://pith.science/pith/ZSQPLGAZPUDKQQRWA2ZRGPK5XL","bundle":"https://pith.science/pith/ZSQPLGAZPUDKQQRWA2ZRGPK5XL/bundle.json","state":"https://pith.science/pith/ZSQPLGAZPUDKQQRWA2ZRGPK5XL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZSQPLGAZPUDKQQRWA2ZRGPK5XL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:ZSQPLGAZPUDKQQRWA2ZRGPK5XL","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":"6f13a8e92640c79282e66958e1f9522b9bd424a347dc517a3fc137a454631f98","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-03-16T18:00:01Z","title_canon_sha256":"7e5c339cdf341a101972014bdabd5a2cc615cae281efc267748186af5d61933a"},"schema_version":"1.0","source":{"id":"2303.09569","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2303.09569","created_at":"2026-07-05T06:56:21Z"},{"alias_kind":"arxiv_version","alias_value":"2303.09569v2","created_at":"2026-07-05T06:56:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2303.09569","created_at":"2026-07-05T06:56:21Z"},{"alias_kind":"pith_short_12","alias_value":"ZSQPLGAZPUDK","created_at":"2026-07-05T06:56:21Z"},{"alias_kind":"pith_short_16","alias_value":"ZSQPLGAZPUDKQQRW","created_at":"2026-07-05T06:56:21Z"},{"alias_kind":"pith_short_8","alias_value":"ZSQPLGAZ","created_at":"2026-07-05T06:56:21Z"}],"graph_snapshots":[{"event_id":"sha256:6ea7ea3dd17c085d7f588b41ba26de363812bb6826948cc621f7937aa646f6b8","target":"graph","created_at":"2026-07-05T06:56:21Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2303.09569/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Massive black-hole (BH) mergers are predicted to be powerful sources of low-frequency gravitational waves (GWs). Coupling the detection of GWs with an electromagnetic (EM) detection can provide key information about merging BHs and their environments. We study the high-resolution cosmological radiation-hydrodynamics simulation OBELISK, run to redshift $z=3.5$, to assess the GW and EM detectability of high-$z$ BH mergers, modelling spectral energy distribution and obscuration. For EM detectability, we further consider sub-grid dynamical delays in postprocessing. We find that most of the merger ","authors_text":"A. Mangiagli, C. A. Dong-P\\'aez, M. Trebitsch, M. Volonteri, N. Webb, R. S. Beckmann, S. Vergani, Y. Dubois","cross_cats":["astro-ph.GA"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-03-16T18:00:01Z","title":"Multimessenger study of merging massive black holes in the OBELISK simulation: gravitational waves, electromagnetic counterparts, and their link to galaxy and black hole populations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2303.09569","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":"sha256:0d744bb1966662f0e27d9b5b159261022c1ac9838ea3fc639ac2d858d5c30bc3","target":"record","created_at":"2026-07-05T06:56:21Z","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":"6f13a8e92640c79282e66958e1f9522b9bd424a347dc517a3fc137a454631f98","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-03-16T18:00:01Z","title_canon_sha256":"7e5c339cdf341a101972014bdabd5a2cc615cae281efc267748186af5d61933a"},"schema_version":"1.0","source":{"id":"2303.09569","kind":"arxiv","version":2}},"canonical_sha256":"cca0f598197d06a8423606b3133d5dbac2f3788e7e811dd47e1fdce9dedaed19","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cca0f598197d06a8423606b3133d5dbac2f3788e7e811dd47e1fdce9dedaed19","first_computed_at":"2026-07-05T06:56:21.179674Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:56:21.179674Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"p1AZnbVFsI1IqXborDw1qC+lCohrL/mrql1I6CJHQi3anLAapCrhdvKFkvEMiRi7h6MLWZ5TurNI0O+uEiMyBw==","signature_status":"signed_v1","signed_at":"2026-07-05T06:56:21.180166Z","signed_message":"canonical_sha256_bytes"},"source_id":"2303.09569","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0d744bb1966662f0e27d9b5b159261022c1ac9838ea3fc639ac2d858d5c30bc3","sha256:6ea7ea3dd17c085d7f588b41ba26de363812bb6826948cc621f7937aa646f6b8"],"state_sha256":"a8339549bf35c0e054b5fa84f9dc74bcb8a3639fb81949dc9383e48da70060fc"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9m0PGxZwCOdR0W1RoF67YtGPD7Yr+4h7FfxZAVaaceqXPo4TjgfdK8Ken4gO9b7C2pXPFALPae1djI2vdabuDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-01T10:25:39.654935Z","bundle_sha256":"6dc6aa78cd5d818d5491fc11487d89ebed7b45eecf16fe494ba66dab666870cc"}}