{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2024:BMQLCZ4VOXE7W44JXOW4L7U6RY","short_pith_number":"pith:BMQLCZ4V","schema_version":"1.0","canonical_sha256":"0b20b1679575c9fb7389bbadc5fe9e8e1bbc80a4b4e23d32dbffd085232a8c26","source":{"kind":"arxiv","id":"2404.17160","version":1},"attestation_state":"computed","paper":{"title":"Discovery of evolving low-frequency QPOs in hard X-rays ($\\sim 100$ keV) observed in black hole Swift J1727.8-1613 with $AstroSat$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Anuj Nandi (URSC), H. M. Antia (University of Mumbai), Parag Shah (TIFR), Santabrata Das (IIT Guwahati), Seshadri Majumder (IIT Guwahati), Tilak Katoch (TIFR)","submitted_at":"2024-04-26T05:09:41Z","abstract_excerpt":"We report the first detection of evolving Low-Frequency Quasi-periodic Oscillation (LFQPO) frequencies in hard X-rays upto $100$ keV with $AstroSat/LAXPC$ during `unusual' outburst phase of Swift J1727.8-1613 in hard-intermediate state (HIMS). The observed LFQPO in $20 - 100$ keV has a centroid $\\nu_{_{\\rm QPO}}=1.43$ Hz, a coherence factor $Q= 7.14$ and an amplitude ${\\rm rms_{_{\\rm QPO}}} = 10.95\\%$ with significance $\\sigma = 5.46$. Type-C QPOs ($1.09-2.6$ Hz) are found to evolve monotonically during HIMS of the outburst with clear detection in hard X-rays ($80 - 100$ keV), where ${\\rm rms_"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2404.17160","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-04-26T05:09:41Z","cross_cats_sorted":[],"title_canon_sha256":"c71bf229080acff4228a56dba7cafd4d1599c87200b4ce2154a01aae5b1f1776","abstract_canon_sha256":"403c53a1e139ca27da37e769a10a71a576df61977cb60db6caf33e4e62338b24"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:12:33.685481Z","signature_b64":"5ea+/f6l+Qf/r0uvBcihmtImcjqKAH7R0ceh4CEqU6ozaiLX7J8BJrU+1j4TQFsNGZQZxPYPJriEvsbyfArJDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0b20b1679575c9fb7389bbadc5fe9e8e1bbc80a4b4e23d32dbffd085232a8c26","last_reissued_at":"2026-07-05T08:12:33.684944Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:12:33.684944Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Discovery of evolving low-frequency QPOs in hard X-rays ($\\sim 100$ keV) observed in black hole Swift J1727.8-1613 with $AstroSat$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Anuj Nandi (URSC), H. M. Antia (University of Mumbai), Parag Shah (TIFR), Santabrata Das (IIT Guwahati), Seshadri Majumder (IIT Guwahati), Tilak Katoch (TIFR)","submitted_at":"2024-04-26T05:09:41Z","abstract_excerpt":"We report the first detection of evolving Low-Frequency Quasi-periodic Oscillation (LFQPO) frequencies in hard X-rays upto $100$ keV with $AstroSat/LAXPC$ during `unusual' outburst phase of Swift J1727.8-1613 in hard-intermediate state (HIMS). The observed LFQPO in $20 - 100$ keV has a centroid $\\nu_{_{\\rm QPO}}=1.43$ Hz, a coherence factor $Q= 7.14$ and an amplitude ${\\rm rms_{_{\\rm QPO}}} = 10.95\\%$ with significance $\\sigma = 5.46$. Type-C QPOs ($1.09-2.6$ Hz) are found to evolve monotonically during HIMS of the outburst with clear detection in hard X-rays ($80 - 100$ keV), where ${\\rm rms_"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2404.17160","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2404.17160/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2404.17160","created_at":"2026-07-05T08:12:33.685017+00:00"},{"alias_kind":"arxiv_version","alias_value":"2404.17160v1","created_at":"2026-07-05T08:12:33.685017+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2404.17160","created_at":"2026-07-05T08:12:33.685017+00:00"},{"alias_kind":"pith_short_12","alias_value":"BMQLCZ4VOXE7","created_at":"2026-07-05T08:12:33.685017+00:00"},{"alias_kind":"pith_short_16","alias_value":"BMQLCZ4VOXE7W44J","created_at":"2026-07-05T08:12:33.685017+00:00"},{"alias_kind":"pith_short_8","alias_value":"BMQLCZ4V","created_at":"2026-07-05T08:12:33.685017+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/BMQLCZ4VOXE7W44JXOW4L7U6RY","json":"https://pith.science/pith/BMQLCZ4VOXE7W44JXOW4L7U6RY.json","graph_json":"https://pith.science/api/pith-number/BMQLCZ4VOXE7W44JXOW4L7U6RY/graph.json","events_json":"https://pith.science/api/pith-number/BMQLCZ4VOXE7W44JXOW4L7U6RY/events.json","paper":"https://pith.science/paper/BMQLCZ4V"},"agent_actions":{"view_html":"https://pith.science/pith/BMQLCZ4VOXE7W44JXOW4L7U6RY","download_json":"https://pith.science/pith/BMQLCZ4VOXE7W44JXOW4L7U6RY.json","view_paper":"https://pith.science/paper/BMQLCZ4V","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2404.17160&json=true","fetch_graph":"https://pith.science/api/pith-number/BMQLCZ4VOXE7W44JXOW4L7U6RY/graph.json","fetch_events":"https://pith.science/api/pith-number/BMQLCZ4VOXE7W44JXOW4L7U6RY/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/BMQLCZ4VOXE7W44JXOW4L7U6RY/action/timestamp_anchor","attest_storage":"https://pith.science/pith/BMQLCZ4VOXE7W44JXOW4L7U6RY/action/storage_attestation","attest_author":"https://pith.science/pith/BMQLCZ4VOXE7W44JXOW4L7U6RY/action/author_attestation","sign_citation":"https://pith.science/pith/BMQLCZ4VOXE7W44JXOW4L7U6RY/action/citation_signature","submit_replication":"https://pith.science/pith/BMQLCZ4VOXE7W44JXOW4L7U6RY/action/replication_record"}},"created_at":"2026-07-05T08:12:33.685017+00:00","updated_at":"2026-07-05T08:12:33.685017+00:00"}