{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:TTO7D2APXY6VOIAE5KTPQSXPAX","short_pith_number":"pith:TTO7D2AP","canonical_record":{"source":{"id":"1502.04125","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-02-13T21:00:04Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"afba73e40446a0033ebf30fedc174c615a5426024bb34ffeb8040b05f66979d1","abstract_canon_sha256":"a0010bffcf6d8679dc510b14085152bd8b8097e24728fc58b829eeb274d6a611"},"schema_version":"1.0"},"canonical_sha256":"9cddf1e80fbe3d572004eaa6f84aef05c34cd894b41655b48dae82cb4daf238d","source":{"kind":"arxiv","id":"1502.04125","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.04125","created_at":"2026-05-18T02:19:00Z"},{"alias_kind":"arxiv_version","alias_value":"1502.04125v3","created_at":"2026-05-18T02:19:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.04125","created_at":"2026-05-18T02:19:00Z"},{"alias_kind":"pith_short_12","alias_value":"TTO7D2APXY6V","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"TTO7D2APXY6VOIAE","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"TTO7D2AP","created_at":"2026-05-18T12:29:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:TTO7D2APXY6VOIAE5KTPQSXPAX","target":"record","payload":{"canonical_record":{"source":{"id":"1502.04125","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-02-13T21:00:04Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"afba73e40446a0033ebf30fedc174c615a5426024bb34ffeb8040b05f66979d1","abstract_canon_sha256":"a0010bffcf6d8679dc510b14085152bd8b8097e24728fc58b829eeb274d6a611"},"schema_version":"1.0"},"canonical_sha256":"9cddf1e80fbe3d572004eaa6f84aef05c34cd894b41655b48dae82cb4daf238d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:19:00.335234Z","signature_b64":"eGZlrf/Mi8y2bm3/keqjK/zwQq2TOXuDv0gr+4VLGyqzlo63Yvr6up4ncO2WnNiUXk9356JsyJfF2sbHqHdABA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9cddf1e80fbe3d572004eaa6f84aef05c34cd894b41655b48dae82cb4daf238d","last_reissued_at":"2026-05-18T02:19:00.334629Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:19:00.334629Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1502.04125","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:19:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9/PE8nCjO0P01vGp98I2sXOHMZ1POppIk/TqM/Cb0X+qF0daoewSKQY1kEGjFX9WE1KIBkkpM9IUn+mWtayEDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T06:15:26.758218Z"},"content_sha256":"412bd4a36abf81e72410a32d8884cb4699f1e07dc74644cf2e6e1995c0b116d4","schema_version":"1.0","event_id":"sha256:412bd4a36abf81e72410a32d8884cb4699f1e07dc74644cf2e6e1995c0b116d4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:TTO7D2APXY6VOIAE5KTPQSXPAX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Gravitational Waves from Direct Collapse Black Holes Formation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"Andrea Ferrara, Fabio Pacucci, Stefania Marassi","submitted_at":"2015-02-13T21:00:04Z","abstract_excerpt":"The possible formation of Direct Collapse Black Holes (DCBHs) in the first metal-free atomic cooling halos at high redshifts ($z > 10$) is nowadays object of intense study and several methods to prove their existence are currently under development. The abrupt collapse of a massive ($\\sim 10^4 - 10^5 \\, \\mathrm{M_{\\odot}}$) and rotating object is a powerful source of gravitational waves emission. In this work, we employ modern waveforms and the improved knowledge on the DCBHs formation rate to estimate the gravitational signal emitted by these sources at cosmological distances. Their formation"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.04125","kind":"arxiv","version":3},"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":"2026-05-18T02:19:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3m0xZ2giHO6rDLw2/l0dh/Krazz6btLBzC2HtDLvdr5Pvuoui0jKDtUQ6wxLWzfERnl0H0zGuy5yLFpMifR4Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T06:15:26.758732Z"},"content_sha256":"38e08173948e68c8ce10fd2a7e84e9b3537e1104c39f18017a4936adb24f8100","schema_version":"1.0","event_id":"sha256:38e08173948e68c8ce10fd2a7e84e9b3537e1104c39f18017a4936adb24f8100"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TTO7D2APXY6VOIAE5KTPQSXPAX/bundle.json","state_url":"https://pith.science/pith/TTO7D2APXY6VOIAE5KTPQSXPAX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TTO7D2APXY6VOIAE5KTPQSXPAX/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":"2026-05-30T06:15:26Z","links":{"resolver":"https://pith.science/pith/TTO7D2APXY6VOIAE5KTPQSXPAX","bundle":"https://pith.science/pith/TTO7D2APXY6VOIAE5KTPQSXPAX/bundle.json","state":"https://pith.science/pith/TTO7D2APXY6VOIAE5KTPQSXPAX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TTO7D2APXY6VOIAE5KTPQSXPAX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:TTO7D2APXY6VOIAE5KTPQSXPAX","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":"a0010bffcf6d8679dc510b14085152bd8b8097e24728fc58b829eeb274d6a611","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-02-13T21:00:04Z","title_canon_sha256":"afba73e40446a0033ebf30fedc174c615a5426024bb34ffeb8040b05f66979d1"},"schema_version":"1.0","source":{"id":"1502.04125","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.04125","created_at":"2026-05-18T02:19:00Z"},{"alias_kind":"arxiv_version","alias_value":"1502.04125v3","created_at":"2026-05-18T02:19:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.04125","created_at":"2026-05-18T02:19:00Z"},{"alias_kind":"pith_short_12","alias_value":"TTO7D2APXY6V","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"TTO7D2APXY6VOIAE","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"TTO7D2AP","created_at":"2026-05-18T12:29:42Z"}],"graph_snapshots":[{"event_id":"sha256:38e08173948e68c8ce10fd2a7e84e9b3537e1104c39f18017a4936adb24f8100","target":"graph","created_at":"2026-05-18T02:19:00Z","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 possible formation of Direct Collapse Black Holes (DCBHs) in the first metal-free atomic cooling halos at high redshifts ($z > 10$) is nowadays object of intense study and several methods to prove their existence are currently under development. The abrupt collapse of a massive ($\\sim 10^4 - 10^5 \\, \\mathrm{M_{\\odot}}$) and rotating object is a powerful source of gravitational waves emission. In this work, we employ modern waveforms and the improved knowledge on the DCBHs formation rate to estimate the gravitational signal emitted by these sources at cosmological distances. Their formation","authors_text":"Andrea Ferrara, Fabio Pacucci, Stefania Marassi","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-02-13T21:00:04Z","title":"Gravitational Waves from Direct Collapse Black Holes Formation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.04125","kind":"arxiv","version":3},"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":"sha256:412bd4a36abf81e72410a32d8884cb4699f1e07dc74644cf2e6e1995c0b116d4","target":"record","created_at":"2026-05-18T02:19:00Z","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":"a0010bffcf6d8679dc510b14085152bd8b8097e24728fc58b829eeb274d6a611","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-02-13T21:00:04Z","title_canon_sha256":"afba73e40446a0033ebf30fedc174c615a5426024bb34ffeb8040b05f66979d1"},"schema_version":"1.0","source":{"id":"1502.04125","kind":"arxiv","version":3}},"canonical_sha256":"9cddf1e80fbe3d572004eaa6f84aef05c34cd894b41655b48dae82cb4daf238d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9cddf1e80fbe3d572004eaa6f84aef05c34cd894b41655b48dae82cb4daf238d","first_computed_at":"2026-05-18T02:19:00.334629Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:19:00.334629Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eGZlrf/Mi8y2bm3/keqjK/zwQq2TOXuDv0gr+4VLGyqzlo63Yvr6up4ncO2WnNiUXk9356JsyJfF2sbHqHdABA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:19:00.335234Z","signed_message":"canonical_sha256_bytes"},"source_id":"1502.04125","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:412bd4a36abf81e72410a32d8884cb4699f1e07dc74644cf2e6e1995c0b116d4","sha256:38e08173948e68c8ce10fd2a7e84e9b3537e1104c39f18017a4936adb24f8100"],"state_sha256":"bee4de1e1a64e4bc4b201eacbc35844e8e687499c6ee3bdfa8f32091907c23bf"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UDAd9jNQQ8xJp8OwSIXvNRjuvXpoodxSuYcol652tHJOFTMgz9woz+mXLaIdtYQ0NeYJZHiphp4rIarvfvqGAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T06:15:26.761973Z","bundle_sha256":"b52f69a58774a54b4bb8727c0a0720a47ff60e149ca1596b3c8cd13fad63bab7"}}