{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:BPJOCEEHVCACHKEJOULZWQU4KI","short_pith_number":"pith:BPJOCEEH","canonical_record":{"source":{"id":"1506.02001","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-06-05T18:15:27Z","cross_cats_sorted":[],"title_canon_sha256":"bb6d4aa183410610b40e81f0825ecf7ab23b4a4e0349513297ff8614f9195ae7","abstract_canon_sha256":"1eb15d97d6c56a068a2e8250485622bd863b327d5341f22274231840bd64e7ca"},"schema_version":"1.0"},"canonical_sha256":"0bd2e11087a88023a88975179b429c5210599cfce4da36bc8db378dca971a902","source":{"kind":"arxiv","id":"1506.02001","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1506.02001","created_at":"2026-05-18T01:32:29Z"},{"alias_kind":"arxiv_version","alias_value":"1506.02001v2","created_at":"2026-05-18T01:32:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1506.02001","created_at":"2026-05-18T01:32:29Z"},{"alias_kind":"pith_short_12","alias_value":"BPJOCEEHVCAC","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_16","alias_value":"BPJOCEEHVCACHKEJ","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_8","alias_value":"BPJOCEEH","created_at":"2026-05-18T12:29:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:BPJOCEEHVCACHKEJOULZWQU4KI","target":"record","payload":{"canonical_record":{"source":{"id":"1506.02001","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-06-05T18:15:27Z","cross_cats_sorted":[],"title_canon_sha256":"bb6d4aa183410610b40e81f0825ecf7ab23b4a4e0349513297ff8614f9195ae7","abstract_canon_sha256":"1eb15d97d6c56a068a2e8250485622bd863b327d5341f22274231840bd64e7ca"},"schema_version":"1.0"},"canonical_sha256":"0bd2e11087a88023a88975179b429c5210599cfce4da36bc8db378dca971a902","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:32:29.207137Z","signature_b64":"7/vM65dvwaHJm/MsnHaZeVQ5vQ1heVn0Hh8bDiAM5beGwcDHIv7q2em0KQvDmIGZfF//PDjUQcA4kogJGgrMDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0bd2e11087a88023a88975179b429c5210599cfce4da36bc8db378dca971a902","last_reissued_at":"2026-05-18T01:32:29.206494Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:32:29.206494Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1506.02001","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:32:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PMxC/MxVSP+NbRw/jT9yIMRzYDmkGds2kXqvpxSbeaWixqbEG1fGKHzPPubqVewUsGmxb0g3AaP3SLUYj8aPAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T16:37:03.020825Z"},"content_sha256":"8894cfd39e8b7aefae0519d4757250b502d1e09ce9e347b9355b4a0fe0f97b63","schema_version":"1.0","event_id":"sha256:8894cfd39e8b7aefae0519d4757250b502d1e09ce9e347b9355b4a0fe0f97b63"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:BPJOCEEHVCACHKEJOULZWQU4KI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"NuSTAR and Swift observations of the black hole candidate XTE J1908+094 during its 2013 outburst","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Brian W. Grefenstette, Charles J. Hailey, Daniel Stern, Dominic J. Walton, Felix Furst, Finn E. Christensen, Fiona A. Harrison, Hans A. Krimm, Jamie Kennea, John A. Tomsick, Jon M. Miller, Katja Pottschmidt, Lian Tao, Poshak Gandhi, Shriharsh P. Tendulkar, Steven E. Boggs, William W. Craig, William W. Zhang","submitted_at":"2015-06-05T18:15:27Z","abstract_excerpt":"The black hole candidate XTE J1908+094 went into outburst for the first time since 2003 in October 2013. We report on an observation with the Nuclear Spectroscopic Telescope Array (NuSTAR) and monitoring observations with Swift during the outburst. NuSTAR caught the source in the soft state: the spectra show a broad relativistic iron line, and the light curves reveal a ~40 ks flare with the count rate peaking about 40% above the non-flare level and with significant spectral variation. A model combining a multi-temperature thermal component, a power-law, and a reflection component with an iron "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.02001","kind":"arxiv","version":2},"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":"2026-05-18T01:32:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"J8GjeS+sO2YLT6wt/qkFM5oKOzq3yzvvggm4h4i4bdr1oJVG+BPzMcNR6cowvYDr9hriTDavW0qwAAbKZkL4Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T16:37:03.021483Z"},"content_sha256":"dc2987d43a92bc05f481cf527a090731b8e7e78772d26984e5a8480e25374ae2","schema_version":"1.0","event_id":"sha256:dc2987d43a92bc05f481cf527a090731b8e7e78772d26984e5a8480e25374ae2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BPJOCEEHVCACHKEJOULZWQU4KI/bundle.json","state_url":"https://pith.science/pith/BPJOCEEHVCACHKEJOULZWQU4KI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BPJOCEEHVCACHKEJOULZWQU4KI/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":"2026-05-31T16:37:03Z","links":{"resolver":"https://pith.science/pith/BPJOCEEHVCACHKEJOULZWQU4KI","bundle":"https://pith.science/pith/BPJOCEEHVCACHKEJOULZWQU4KI/bundle.json","state":"https://pith.science/pith/BPJOCEEHVCACHKEJOULZWQU4KI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BPJOCEEHVCACHKEJOULZWQU4KI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:BPJOCEEHVCACHKEJOULZWQU4KI","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":"1eb15d97d6c56a068a2e8250485622bd863b327d5341f22274231840bd64e7ca","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-06-05T18:15:27Z","title_canon_sha256":"bb6d4aa183410610b40e81f0825ecf7ab23b4a4e0349513297ff8614f9195ae7"},"schema_version":"1.0","source":{"id":"1506.02001","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1506.02001","created_at":"2026-05-18T01:32:29Z"},{"alias_kind":"arxiv_version","alias_value":"1506.02001v2","created_at":"2026-05-18T01:32:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1506.02001","created_at":"2026-05-18T01:32:29Z"},{"alias_kind":"pith_short_12","alias_value":"BPJOCEEHVCAC","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_16","alias_value":"BPJOCEEHVCACHKEJ","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_8","alias_value":"BPJOCEEH","created_at":"2026-05-18T12:29:14Z"}],"graph_snapshots":[{"event_id":"sha256:dc2987d43a92bc05f481cf527a090731b8e7e78772d26984e5a8480e25374ae2","target":"graph","created_at":"2026-05-18T01:32:29Z","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 black hole candidate XTE J1908+094 went into outburst for the first time since 2003 in October 2013. We report on an observation with the Nuclear Spectroscopic Telescope Array (NuSTAR) and monitoring observations with Swift during the outburst. NuSTAR caught the source in the soft state: the spectra show a broad relativistic iron line, and the light curves reveal a ~40 ks flare with the count rate peaking about 40% above the non-flare level and with significant spectral variation. A model combining a multi-temperature thermal component, a power-law, and a reflection component with an iron ","authors_text":"Brian W. Grefenstette, Charles J. Hailey, Daniel Stern, Dominic J. Walton, Felix Furst, Finn E. Christensen, Fiona A. Harrison, Hans A. Krimm, Jamie Kennea, John A. Tomsick, Jon M. Miller, Katja Pottschmidt, Lian Tao, Poshak Gandhi, Shriharsh P. Tendulkar, Steven E. Boggs, William W. Craig, William W. Zhang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-06-05T18:15:27Z","title":"NuSTAR and Swift observations of the black hole candidate XTE J1908+094 during its 2013 outburst"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.02001","kind":"arxiv","version":2},"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":"sha256:8894cfd39e8b7aefae0519d4757250b502d1e09ce9e347b9355b4a0fe0f97b63","target":"record","created_at":"2026-05-18T01:32:29Z","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":"1eb15d97d6c56a068a2e8250485622bd863b327d5341f22274231840bd64e7ca","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-06-05T18:15:27Z","title_canon_sha256":"bb6d4aa183410610b40e81f0825ecf7ab23b4a4e0349513297ff8614f9195ae7"},"schema_version":"1.0","source":{"id":"1506.02001","kind":"arxiv","version":2}},"canonical_sha256":"0bd2e11087a88023a88975179b429c5210599cfce4da36bc8db378dca971a902","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0bd2e11087a88023a88975179b429c5210599cfce4da36bc8db378dca971a902","first_computed_at":"2026-05-18T01:32:29.206494Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:32:29.206494Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7/vM65dvwaHJm/MsnHaZeVQ5vQ1heVn0Hh8bDiAM5beGwcDHIv7q2em0KQvDmIGZfF//PDjUQcA4kogJGgrMDw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:32:29.207137Z","signed_message":"canonical_sha256_bytes"},"source_id":"1506.02001","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8894cfd39e8b7aefae0519d4757250b502d1e09ce9e347b9355b4a0fe0f97b63","sha256:dc2987d43a92bc05f481cf527a090731b8e7e78772d26984e5a8480e25374ae2"],"state_sha256":"47d43c48d3448cd092f4c701d0f3fa13fbe5fea391f53ef89ae5c05fa80bcd32"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4owMm2ozYseIUTZyCA00I/agJsnV/Qhtq4u+1HzmnuvONnq2AHF0Qx0B6AFxO3ym7p2+dVZyzMtwbDf4gNV2Bw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T16:37:03.024708Z","bundle_sha256":"81b31174f036a89438a374181017bcdca2c1f253c24fc461f417603142f9a68d"}}