{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:WSROGDNAAK5VPVXC5NBXYGPLHG","short_pith_number":"pith:WSROGDNA","canonical_record":{"source":{"id":"1701.01774","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-01-06T22:47:10Z","cross_cats_sorted":[],"title_canon_sha256":"172998ab5cab746cbdf211a53174781013099d31b0c944280c65e7514d1a5ed9","abstract_canon_sha256":"02892301de68017e018d32daca49522ab8792a13681d26cc81acb58773a06a91"},"schema_version":"1.0"},"canonical_sha256":"b4a2e30da002bb57d6e2eb437c19eb398e048381cd5c17d24b246a271ff6ebed","source":{"kind":"arxiv","id":"1701.01774","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1701.01774","created_at":"2026-05-18T00:50:17Z"},{"alias_kind":"arxiv_version","alias_value":"1701.01774v1","created_at":"2026-05-18T00:50:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1701.01774","created_at":"2026-05-18T00:50:17Z"},{"alias_kind":"pith_short_12","alias_value":"WSROGDNAAK5V","created_at":"2026-05-18T12:31:53Z"},{"alias_kind":"pith_short_16","alias_value":"WSROGDNAAK5VPVXC","created_at":"2026-05-18T12:31:53Z"},{"alias_kind":"pith_short_8","alias_value":"WSROGDNA","created_at":"2026-05-18T12:31:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:WSROGDNAAK5VPVXC5NBXYGPLHG","target":"record","payload":{"canonical_record":{"source":{"id":"1701.01774","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-01-06T22:47:10Z","cross_cats_sorted":[],"title_canon_sha256":"172998ab5cab746cbdf211a53174781013099d31b0c944280c65e7514d1a5ed9","abstract_canon_sha256":"02892301de68017e018d32daca49522ab8792a13681d26cc81acb58773a06a91"},"schema_version":"1.0"},"canonical_sha256":"b4a2e30da002bb57d6e2eb437c19eb398e048381cd5c17d24b246a271ff6ebed","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:50:17.400099Z","signature_b64":"eD4Zez8ftbUbrkswmzAxWJJveqsjUXwQlpOxLzoTcrWJXYYuEQNZiwUKoqGO5mCHCyEGslxV4NoO+YC+joRBBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b4a2e30da002bb57d6e2eb437c19eb398e048381cd5c17d24b246a271ff6ebed","last_reissued_at":"2026-05-18T00:50:17.399437Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:50:17.399437Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1701.01774","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:50:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EEW5lf+QgunaRhnDlaDywv2ppVyyugP75yx8CDp9yFRSfjmSMJ6Y0RWwNMZ+kGFTbWhaGPzsCIOXdIuwTCLRBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T14:21:49.042852Z"},"content_sha256":"6d2ce341139c5c083bb95c50cc42c28a39984f4c070ff800a907e4d7ebed90f5","schema_version":"1.0","event_id":"sha256:6d2ce341139c5c083bb95c50cc42c28a39984f4c070ff800a907e4d7ebed90f5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:WSROGDNAAK5VPVXC5NBXYGPLHG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Hard Look at the Neutron Stars and Accretion Disks in 4U 1636-53, GX 17+2, and 4U 1705-44 with $\\emph{NuSTAR}$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. C. Bostrom, D. Barret, E. M. Cackett, F. Paerels, J. A. Tomsick, J. M. Miller, L. Natalucci, M. Bachetti, M. L. Parker, N. Degenaar, R. M. Ludlam, T. Di Salvo","submitted_at":"2017-01-06T22:47:10Z","abstract_excerpt":"We present $\\emph{NuSTAR}$ observations of neutron star (NS) low-mass X-ray binaries: 4U 1636-53, GX 17+2, and 4U 1705-44. We observed 4U 1636-53 in the hard state, with an Eddington fraction, $F_{\\mathrm{Edd}}$, of 0.01; GX 17+2 and 4U 1705-44 were in the soft state with fractions of 0.57 and 0.10, respectively. Each spectrum shows evidence for a relativistically broadened Fe K$_{\\alpha}$ line. Through accretion disk reflection modeling, we constrain the radius of the inner disk in 4U 1636-53 to be $R_{in}=1.03\\pm0.03$ ISCO (innermost stable circular orbit) assuming a dimensionless spin param"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1701.01774","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:50:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dB4ulzavqUx3WJM7uXK0NJWyXd71oMJNoNMsbThcg54AV2rkZTXAKm3oCarTwro9fMQHqGC/pURHjiF0jzbpDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T14:21:49.043474Z"},"content_sha256":"f4431c014bc2135ffe8efbfb2799b11fe699584ec331e979d2bd10ac40c50d53","schema_version":"1.0","event_id":"sha256:f4431c014bc2135ffe8efbfb2799b11fe699584ec331e979d2bd10ac40c50d53"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WSROGDNAAK5VPVXC5NBXYGPLHG/bundle.json","state_url":"https://pith.science/pith/WSROGDNAAK5VPVXC5NBXYGPLHG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WSROGDNAAK5VPVXC5NBXYGPLHG/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":"2026-05-26T14:21:49Z","links":{"resolver":"https://pith.science/pith/WSROGDNAAK5VPVXC5NBXYGPLHG","bundle":"https://pith.science/pith/WSROGDNAAK5VPVXC5NBXYGPLHG/bundle.json","state":"https://pith.science/pith/WSROGDNAAK5VPVXC5NBXYGPLHG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WSROGDNAAK5VPVXC5NBXYGPLHG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:WSROGDNAAK5VPVXC5NBXYGPLHG","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":"02892301de68017e018d32daca49522ab8792a13681d26cc81acb58773a06a91","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-01-06T22:47:10Z","title_canon_sha256":"172998ab5cab746cbdf211a53174781013099d31b0c944280c65e7514d1a5ed9"},"schema_version":"1.0","source":{"id":"1701.01774","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1701.01774","created_at":"2026-05-18T00:50:17Z"},{"alias_kind":"arxiv_version","alias_value":"1701.01774v1","created_at":"2026-05-18T00:50:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1701.01774","created_at":"2026-05-18T00:50:17Z"},{"alias_kind":"pith_short_12","alias_value":"WSROGDNAAK5V","created_at":"2026-05-18T12:31:53Z"},{"alias_kind":"pith_short_16","alias_value":"WSROGDNAAK5VPVXC","created_at":"2026-05-18T12:31:53Z"},{"alias_kind":"pith_short_8","alias_value":"WSROGDNA","created_at":"2026-05-18T12:31:53Z"}],"graph_snapshots":[{"event_id":"sha256:f4431c014bc2135ffe8efbfb2799b11fe699584ec331e979d2bd10ac40c50d53","target":"graph","created_at":"2026-05-18T00:50:17Z","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":"We present $\\emph{NuSTAR}$ observations of neutron star (NS) low-mass X-ray binaries: 4U 1636-53, GX 17+2, and 4U 1705-44. We observed 4U 1636-53 in the hard state, with an Eddington fraction, $F_{\\mathrm{Edd}}$, of 0.01; GX 17+2 and 4U 1705-44 were in the soft state with fractions of 0.57 and 0.10, respectively. Each spectrum shows evidence for a relativistically broadened Fe K$_{\\alpha}$ line. Through accretion disk reflection modeling, we constrain the radius of the inner disk in 4U 1636-53 to be $R_{in}=1.03\\pm0.03$ ISCO (innermost stable circular orbit) assuming a dimensionless spin param","authors_text":"A. C. Bostrom, D. Barret, E. M. Cackett, F. Paerels, J. A. Tomsick, J. M. Miller, L. Natalucci, M. Bachetti, M. L. Parker, N. Degenaar, R. M. Ludlam, T. Di Salvo","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-01-06T22:47:10Z","title":"A Hard Look at the Neutron Stars and Accretion Disks in 4U 1636-53, GX 17+2, and 4U 1705-44 with $\\emph{NuSTAR}$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1701.01774","kind":"arxiv","version":1},"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":"sha256:6d2ce341139c5c083bb95c50cc42c28a39984f4c070ff800a907e4d7ebed90f5","target":"record","created_at":"2026-05-18T00:50:17Z","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":"02892301de68017e018d32daca49522ab8792a13681d26cc81acb58773a06a91","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-01-06T22:47:10Z","title_canon_sha256":"172998ab5cab746cbdf211a53174781013099d31b0c944280c65e7514d1a5ed9"},"schema_version":"1.0","source":{"id":"1701.01774","kind":"arxiv","version":1}},"canonical_sha256":"b4a2e30da002bb57d6e2eb437c19eb398e048381cd5c17d24b246a271ff6ebed","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b4a2e30da002bb57d6e2eb437c19eb398e048381cd5c17d24b246a271ff6ebed","first_computed_at":"2026-05-18T00:50:17.399437Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:50:17.399437Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eD4Zez8ftbUbrkswmzAxWJJveqsjUXwQlpOxLzoTcrWJXYYuEQNZiwUKoqGO5mCHCyEGslxV4NoO+YC+joRBBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:50:17.400099Z","signed_message":"canonical_sha256_bytes"},"source_id":"1701.01774","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6d2ce341139c5c083bb95c50cc42c28a39984f4c070ff800a907e4d7ebed90f5","sha256:f4431c014bc2135ffe8efbfb2799b11fe699584ec331e979d2bd10ac40c50d53"],"state_sha256":"1baacd3bcc595d2745e86e49bb59ae312e3ad62132188921c89cfd3575aba6d4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0cmfJxHb50YJD06OsS3/Q1WCoQKyrwXkh5/YODoOE+eQWwSk90U8VVPs+LJoKPbbGxN2b8UVvWIjapOhqV+IBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T14:21:49.046786Z","bundle_sha256":"f571bfcb68ccb55a90bd13860986e0cc541b92655e1d53b5b72a7b2b075cc5e6"}}