{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2013:QBWYU32Z5HN7QMCVUS6ANAWTHK","short_pith_number":"pith:QBWYU32Z","schema_version":"1.0","canonical_sha256":"806d8a6f59e9dbf83055a4bc0682d33aa90eb542980de11339276f4284f29f69","source":{"kind":"arxiv","id":"1301.0274","version":1},"attestation_state":"computed","paper":{"title":"The mass of the black hole in GRS 1915+105: new constraints from IR spectroscopy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"D. J. Hurley, M. T. Reynolds, P. Elebert, P. J. Callanan","submitted_at":"2013-01-02T17:29:00Z","abstract_excerpt":"GRS 1915+105 has the largest mass function of any Galactic black hole system, although the error is relatively large. Here we present spectroscopic analysis of medium-resolution IR VLT archival data of GRS 1915+105 in the K-band. We find an updated ephemeris, and report on attempts to improve the mass function by a refinement of the radial velocity estimate. We show that the spectra are significantly affected by the presence of phase-dependent CO bandhead emission, possibly originating from the accretion disc: we discuss the impact this has on efforts to better constrain the black hole mass. W"},"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":"1301.0274","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-01-02T17:29:00Z","cross_cats_sorted":[],"title_canon_sha256":"e74398bf2fb27fe4bf50fd71ad01e00bbe843f2092f7bb34f16bfcf10146e682","abstract_canon_sha256":"0e626e6e4f68f9a7493e509c2e8f5ab283b0e43b6b7d0aa90580246a70023744"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:52:22.176674Z","signature_b64":"uArPofPr5wEm+7UYz7tWYqIxq3i3mJc+wNia9w9v7FaVXpmZxo3CgLfT6d8hvkSm4kgxVvVoMT+ZUQBZwHvCDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"806d8a6f59e9dbf83055a4bc0682d33aa90eb542980de11339276f4284f29f69","last_reissued_at":"2026-05-18T01:52:22.176220Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:52:22.176220Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The mass of the black hole in GRS 1915+105: new constraints from IR spectroscopy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"D. J. Hurley, M. T. Reynolds, P. Elebert, P. J. Callanan","submitted_at":"2013-01-02T17:29:00Z","abstract_excerpt":"GRS 1915+105 has the largest mass function of any Galactic black hole system, although the error is relatively large. Here we present spectroscopic analysis of medium-resolution IR VLT archival data of GRS 1915+105 in the K-band. We find an updated ephemeris, and report on attempts to improve the mass function by a refinement of the radial velocity estimate. We show that the spectra are significantly affected by the presence of phase-dependent CO bandhead emission, possibly originating from the accretion disc: we discuss the impact this has on efforts to better constrain the black hole mass. W"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1301.0274","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":""},"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":"1301.0274","created_at":"2026-05-18T01:52:22.176292+00:00"},{"alias_kind":"arxiv_version","alias_value":"1301.0274v1","created_at":"2026-05-18T01:52:22.176292+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1301.0274","created_at":"2026-05-18T01:52:22.176292+00:00"},{"alias_kind":"pith_short_12","alias_value":"QBWYU32Z5HN7","created_at":"2026-05-18T12:27:57.521954+00:00"},{"alias_kind":"pith_short_16","alias_value":"QBWYU32Z5HN7QMCV","created_at":"2026-05-18T12:27:57.521954+00:00"},{"alias_kind":"pith_short_8","alias_value":"QBWYU32Z","created_at":"2026-05-18T12:27:57.521954+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/QBWYU32Z5HN7QMCVUS6ANAWTHK","json":"https://pith.science/pith/QBWYU32Z5HN7QMCVUS6ANAWTHK.json","graph_json":"https://pith.science/api/pith-number/QBWYU32Z5HN7QMCVUS6ANAWTHK/graph.json","events_json":"https://pith.science/api/pith-number/QBWYU32Z5HN7QMCVUS6ANAWTHK/events.json","paper":"https://pith.science/paper/QBWYU32Z"},"agent_actions":{"view_html":"https://pith.science/pith/QBWYU32Z5HN7QMCVUS6ANAWTHK","download_json":"https://pith.science/pith/QBWYU32Z5HN7QMCVUS6ANAWTHK.json","view_paper":"https://pith.science/paper/QBWYU32Z","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1301.0274&json=true","fetch_graph":"https://pith.science/api/pith-number/QBWYU32Z5HN7QMCVUS6ANAWTHK/graph.json","fetch_events":"https://pith.science/api/pith-number/QBWYU32Z5HN7QMCVUS6ANAWTHK/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/QBWYU32Z5HN7QMCVUS6ANAWTHK/action/timestamp_anchor","attest_storage":"https://pith.science/pith/QBWYU32Z5HN7QMCVUS6ANAWTHK/action/storage_attestation","attest_author":"https://pith.science/pith/QBWYU32Z5HN7QMCVUS6ANAWTHK/action/author_attestation","sign_citation":"https://pith.science/pith/QBWYU32Z5HN7QMCVUS6ANAWTHK/action/citation_signature","submit_replication":"https://pith.science/pith/QBWYU32Z5HN7QMCVUS6ANAWTHK/action/replication_record"}},"created_at":"2026-05-18T01:52:22.176292+00:00","updated_at":"2026-05-18T01:52:22.176292+00:00"}