{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:UARWKAVJKVTV3EAL4MTAPOJZZN","short_pith_number":"pith:UARWKAVJ","canonical_record":{"source":{"id":"1709.08870","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-09-26T07:53:28Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"9807746b804679a0dac0a852a76978f81cfb3f47b11a1598c358118b603955a3","abstract_canon_sha256":"148109d792884e5c50e2fa2beed5c58004ff5105302f0ad46c82da87721c264e"},"schema_version":"1.0"},"canonical_sha256":"a0236502a955675d900be32607b939cb60143b3cfac380fca5d5966144070d26","source":{"kind":"arxiv","id":"1709.08870","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1709.08870","created_at":"2026-05-18T00:27:31Z"},{"alias_kind":"arxiv_version","alias_value":"1709.08870v3","created_at":"2026-05-18T00:27:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1709.08870","created_at":"2026-05-18T00:27:31Z"},{"alias_kind":"pith_short_12","alias_value":"UARWKAVJKVTV","created_at":"2026-05-18T12:31:46Z"},{"alias_kind":"pith_short_16","alias_value":"UARWKAVJKVTV3EAL","created_at":"2026-05-18T12:31:46Z"},{"alias_kind":"pith_short_8","alias_value":"UARWKAVJ","created_at":"2026-05-18T12:31:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:UARWKAVJKVTV3EAL4MTAPOJZZN","target":"record","payload":{"canonical_record":{"source":{"id":"1709.08870","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-09-26T07:53:28Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"9807746b804679a0dac0a852a76978f81cfb3f47b11a1598c358118b603955a3","abstract_canon_sha256":"148109d792884e5c50e2fa2beed5c58004ff5105302f0ad46c82da87721c264e"},"schema_version":"1.0"},"canonical_sha256":"a0236502a955675d900be32607b939cb60143b3cfac380fca5d5966144070d26","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:27:31.448234Z","signature_b64":"qPVJq3ANa8pOTaSX0/X0UZUxXxF9b8340gwMJeZK1M3XPutrahki6HjGCIrR4rlP5NVpuLsOpyNgcWrtQV/wBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a0236502a955675d900be32607b939cb60143b3cfac380fca5d5966144070d26","last_reissued_at":"2026-05-18T00:27:31.447392Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:27:31.447392Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1709.08870","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":"2026-05-18T00:27:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tUduKg04kuJhMkcl5RKC0ObntiEWeHlPxpThs3DICqDXWmCj8fM7Rywtnj2o5speGRemX7E6faBzbFlbaiRSAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T04:21:41.194201Z"},"content_sha256":"d3d179711b2985a1cea8ccd7485605e10e2deac8aa5d5a7f61af720cb54600bd","schema_version":"1.0","event_id":"sha256:d3d179711b2985a1cea8ccd7485605e10e2deac8aa5d5a7f61af720cb54600bd"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:UARWKAVJKVTV3EAL4MTAPOJZZN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spline Based Search Method For Unmodeled Transient Gravitational Wave Chirps","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"gr-qc","authors_text":"Soumya D. Mohanty","submitted_at":"2017-09-26T07:53:28Z","abstract_excerpt":"A method is described for the detection and estimation of transient chirp signals that are characterized by smoothly evolving, but otherwise unmodeled, amplitude envelopes and instantaneous frequencies. Such signals are particularly relevant for gravitational wave searches, where they may arise in a wide range of astrophysical scenarios. The method uses splines with continuously adjustable breakpoints to represent the amplitude envelope and instantaneous frequency of a signal, and estimates them from noisy data using penalized least squares and model selection. Simulations based on waveforms s"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1709.08870","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":"2026-05-18T00:27:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"A/osqw/n+tbiq1025992dWNaXntzUFR/olM+aEXnxQU8/9gr9ZZgr1fwtol5Y9AUBLXFFiz4lkWgH+UOagbaBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T04:21:41.194559Z"},"content_sha256":"c644bc9044292118cc5389e7ef18ef3fa59b06ecada6716f19e5d1c3b67d53c9","schema_version":"1.0","event_id":"sha256:c644bc9044292118cc5389e7ef18ef3fa59b06ecada6716f19e5d1c3b67d53c9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UARWKAVJKVTV3EAL4MTAPOJZZN/bundle.json","state_url":"https://pith.science/pith/UARWKAVJKVTV3EAL4MTAPOJZZN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UARWKAVJKVTV3EAL4MTAPOJZZN/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":"2026-06-02T04:21:41Z","links":{"resolver":"https://pith.science/pith/UARWKAVJKVTV3EAL4MTAPOJZZN","bundle":"https://pith.science/pith/UARWKAVJKVTV3EAL4MTAPOJZZN/bundle.json","state":"https://pith.science/pith/UARWKAVJKVTV3EAL4MTAPOJZZN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UARWKAVJKVTV3EAL4MTAPOJZZN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:UARWKAVJKVTV3EAL4MTAPOJZZN","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":"148109d792884e5c50e2fa2beed5c58004ff5105302f0ad46c82da87721c264e","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-09-26T07:53:28Z","title_canon_sha256":"9807746b804679a0dac0a852a76978f81cfb3f47b11a1598c358118b603955a3"},"schema_version":"1.0","source":{"id":"1709.08870","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1709.08870","created_at":"2026-05-18T00:27:31Z"},{"alias_kind":"arxiv_version","alias_value":"1709.08870v3","created_at":"2026-05-18T00:27:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1709.08870","created_at":"2026-05-18T00:27:31Z"},{"alias_kind":"pith_short_12","alias_value":"UARWKAVJKVTV","created_at":"2026-05-18T12:31:46Z"},{"alias_kind":"pith_short_16","alias_value":"UARWKAVJKVTV3EAL","created_at":"2026-05-18T12:31:46Z"},{"alias_kind":"pith_short_8","alias_value":"UARWKAVJ","created_at":"2026-05-18T12:31:46Z"}],"graph_snapshots":[{"event_id":"sha256:c644bc9044292118cc5389e7ef18ef3fa59b06ecada6716f19e5d1c3b67d53c9","target":"graph","created_at":"2026-05-18T00:27:31Z","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":"A method is described for the detection and estimation of transient chirp signals that are characterized by smoothly evolving, but otherwise unmodeled, amplitude envelopes and instantaneous frequencies. Such signals are particularly relevant for gravitational wave searches, where they may arise in a wide range of astrophysical scenarios. The method uses splines with continuously adjustable breakpoints to represent the amplitude envelope and instantaneous frequency of a signal, and estimates them from noisy data using penalized least squares and model selection. Simulations based on waveforms s","authors_text":"Soumya D. Mohanty","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-09-26T07:53:28Z","title":"Spline Based Search Method For Unmodeled Transient Gravitational Wave Chirps"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1709.08870","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:d3d179711b2985a1cea8ccd7485605e10e2deac8aa5d5a7f61af720cb54600bd","target":"record","created_at":"2026-05-18T00:27:31Z","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":"148109d792884e5c50e2fa2beed5c58004ff5105302f0ad46c82da87721c264e","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-09-26T07:53:28Z","title_canon_sha256":"9807746b804679a0dac0a852a76978f81cfb3f47b11a1598c358118b603955a3"},"schema_version":"1.0","source":{"id":"1709.08870","kind":"arxiv","version":3}},"canonical_sha256":"a0236502a955675d900be32607b939cb60143b3cfac380fca5d5966144070d26","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a0236502a955675d900be32607b939cb60143b3cfac380fca5d5966144070d26","first_computed_at":"2026-05-18T00:27:31.447392Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:27:31.447392Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qPVJq3ANa8pOTaSX0/X0UZUxXxF9b8340gwMJeZK1M3XPutrahki6HjGCIrR4rlP5NVpuLsOpyNgcWrtQV/wBA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:27:31.448234Z","signed_message":"canonical_sha256_bytes"},"source_id":"1709.08870","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d3d179711b2985a1cea8ccd7485605e10e2deac8aa5d5a7f61af720cb54600bd","sha256:c644bc9044292118cc5389e7ef18ef3fa59b06ecada6716f19e5d1c3b67d53c9"],"state_sha256":"8b3c7659b08ace98dbe9ebd4db61f6a36e7704f1e5c45aa3405a7a395c3e817e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wm/amgFr1XsapliXUl0hporxu5aBA0/LmkTZ2WOvHldrASNXN/8NxfkIIqLtVKLnD3Py+KkW4ljvPqjyHhf2Dg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T04:21:41.196392Z","bundle_sha256":"ee6cbf2553f863a6d6b3fe8dbed1d2be78284efd6ab42010c1b9a48b1d01aa6d"}}