{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:ZHAKYA7YYAZ46IB3W6LMY2PRPG","short_pith_number":"pith:ZHAKYA7Y","canonical_record":{"source":{"id":"1704.02321","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-04-07T18:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"63599a89297d4a4d0039413b35dcc63b0cbc31cb4033e426a8f39323fb72bc94","abstract_canon_sha256":"2346a7906a12ff7b0ec2ddcb44e90b9d8e02b69f2ee1c9a0753240fb2eacaffa"},"schema_version":"1.0"},"canonical_sha256":"c9c0ac03f8c033cf203bb796cc69f1799f02520edee8f88ac8d4d1c68544697d","source":{"kind":"arxiv","id":"1704.02321","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.02321","created_at":"2026-05-18T00:31:13Z"},{"alias_kind":"arxiv_version","alias_value":"1704.02321v1","created_at":"2026-05-18T00:31:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.02321","created_at":"2026-05-18T00:31:13Z"},{"alias_kind":"pith_short_12","alias_value":"ZHAKYA7YYAZ4","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_16","alias_value":"ZHAKYA7YYAZ46IB3","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_8","alias_value":"ZHAKYA7Y","created_at":"2026-05-18T12:31:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:ZHAKYA7YYAZ46IB3W6LMY2PRPG","target":"record","payload":{"canonical_record":{"source":{"id":"1704.02321","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-04-07T18:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"63599a89297d4a4d0039413b35dcc63b0cbc31cb4033e426a8f39323fb72bc94","abstract_canon_sha256":"2346a7906a12ff7b0ec2ddcb44e90b9d8e02b69f2ee1c9a0753240fb2eacaffa"},"schema_version":"1.0"},"canonical_sha256":"c9c0ac03f8c033cf203bb796cc69f1799f02520edee8f88ac8d4d1c68544697d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:31:13.098538Z","signature_b64":"ZHBtrVPXzWftLntYhJgYlUfNxPL/LyqIGwWZSn+gG/1y2wygFdbKIQFDPxhx9jIBB3xYBEhrjOi8wWgkl4QzCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c9c0ac03f8c033cf203bb796cc69f1799f02520edee8f88ac8d4d1c68544697d","last_reissued_at":"2026-05-18T00:31:13.098055Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:31:13.098055Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1704.02321","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":"2026-05-18T00:31:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bjKlvtl9uGU5kjJh9FuyxM0VWKZcO0tttrmPWVelSzHhqpHvD6wcu+cNu5u7e+dOLP4Rjee780z6uResws1NAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T20:49:10.198174Z"},"content_sha256":"4337e772208b083c824fd4b3a63fcd9af1dea7b283ac6d28e81bf82a935d1ed6","schema_version":"1.0","event_id":"sha256:4337e772208b083c824fd4b3a63fcd9af1dea7b283ac6d28e81bf82a935d1ed6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:ZHAKYA7YYAZ46IB3W6LMY2PRPG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Ultraviolet Spectroscopic Evolution of the Low-Luminosity Tidal Disruption Event iPTF16fnl","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"B. J. Shappee, C. S. Kochanek, E. Falco, J. L. Prieto, J. S. Brown, J. Strader, K. Auchettl, K. Z. Stanek, L. Chomiuk, N. Morrell, P. Chen, R. Post, S. Bose, S. Dong, S. Mathur, S. Villanueva Jr., T. W.-S. Holoien","submitted_at":"2017-04-07T18:00:01Z","abstract_excerpt":"We present the ultraviolet (UV) spectroscopic evolution of a tidal disruption event (TDE) for the first time. After the discovery of the nearby TDE iPTF16fnl, we obtained a series of observations with the Space Telescope Imaging Spectrograph (STIS) onboard the Hubble Space Telescope (HST). The dominant emission features closely resemble those seen in the UV spectra of the TDE ASASSN-14li and are also similar to those of N-rich quasars. However, there is significant evolution in the shape and central wavelength of the line profiles over the course of our observations, such that at early times t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.02321","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":"2026-05-18T00:31:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"D/Y/4EbDu06+reyaWEafLFt1dzLNGqgCKhH8MsRF+ZhI1bY/07vVSWNTi7M8Ff25IW/TqOBDgF6NV08YMEc5BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T20:49:10.198927Z"},"content_sha256":"e10e14bff0ed28c332cadcc7c9fb736209beaf64b85eed887e80009880fd4e4b","schema_version":"1.0","event_id":"sha256:e10e14bff0ed28c332cadcc7c9fb736209beaf64b85eed887e80009880fd4e4b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZHAKYA7YYAZ46IB3W6LMY2PRPG/bundle.json","state_url":"https://pith.science/pith/ZHAKYA7YYAZ46IB3W6LMY2PRPG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZHAKYA7YYAZ46IB3W6LMY2PRPG/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":"2026-06-04T20:49:10Z","links":{"resolver":"https://pith.science/pith/ZHAKYA7YYAZ46IB3W6LMY2PRPG","bundle":"https://pith.science/pith/ZHAKYA7YYAZ46IB3W6LMY2PRPG/bundle.json","state":"https://pith.science/pith/ZHAKYA7YYAZ46IB3W6LMY2PRPG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZHAKYA7YYAZ46IB3W6LMY2PRPG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:ZHAKYA7YYAZ46IB3W6LMY2PRPG","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":"2346a7906a12ff7b0ec2ddcb44e90b9d8e02b69f2ee1c9a0753240fb2eacaffa","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-04-07T18:00:01Z","title_canon_sha256":"63599a89297d4a4d0039413b35dcc63b0cbc31cb4033e426a8f39323fb72bc94"},"schema_version":"1.0","source":{"id":"1704.02321","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.02321","created_at":"2026-05-18T00:31:13Z"},{"alias_kind":"arxiv_version","alias_value":"1704.02321v1","created_at":"2026-05-18T00:31:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.02321","created_at":"2026-05-18T00:31:13Z"},{"alias_kind":"pith_short_12","alias_value":"ZHAKYA7YYAZ4","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_16","alias_value":"ZHAKYA7YYAZ46IB3","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_8","alias_value":"ZHAKYA7Y","created_at":"2026-05-18T12:31:59Z"}],"graph_snapshots":[{"event_id":"sha256:e10e14bff0ed28c332cadcc7c9fb736209beaf64b85eed887e80009880fd4e4b","target":"graph","created_at":"2026-05-18T00:31:13Z","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 the ultraviolet (UV) spectroscopic evolution of a tidal disruption event (TDE) for the first time. After the discovery of the nearby TDE iPTF16fnl, we obtained a series of observations with the Space Telescope Imaging Spectrograph (STIS) onboard the Hubble Space Telescope (HST). The dominant emission features closely resemble those seen in the UV spectra of the TDE ASASSN-14li and are also similar to those of N-rich quasars. However, there is significant evolution in the shape and central wavelength of the line profiles over the course of our observations, such that at early times t","authors_text":"B. J. Shappee, C. S. Kochanek, E. Falco, J. L. Prieto, J. S. Brown, J. Strader, K. Auchettl, K. Z. Stanek, L. Chomiuk, N. Morrell, P. Chen, R. Post, S. Bose, S. Dong, S. Mathur, S. Villanueva Jr., T. W.-S. Holoien","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-04-07T18:00:01Z","title":"The Ultraviolet Spectroscopic Evolution of the Low-Luminosity Tidal Disruption Event iPTF16fnl"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.02321","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":"sha256:4337e772208b083c824fd4b3a63fcd9af1dea7b283ac6d28e81bf82a935d1ed6","target":"record","created_at":"2026-05-18T00:31:13Z","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":"2346a7906a12ff7b0ec2ddcb44e90b9d8e02b69f2ee1c9a0753240fb2eacaffa","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-04-07T18:00:01Z","title_canon_sha256":"63599a89297d4a4d0039413b35dcc63b0cbc31cb4033e426a8f39323fb72bc94"},"schema_version":"1.0","source":{"id":"1704.02321","kind":"arxiv","version":1}},"canonical_sha256":"c9c0ac03f8c033cf203bb796cc69f1799f02520edee8f88ac8d4d1c68544697d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c9c0ac03f8c033cf203bb796cc69f1799f02520edee8f88ac8d4d1c68544697d","first_computed_at":"2026-05-18T00:31:13.098055Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:31:13.098055Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZHBtrVPXzWftLntYhJgYlUfNxPL/LyqIGwWZSn+gG/1y2wygFdbKIQFDPxhx9jIBB3xYBEhrjOi8wWgkl4QzCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:31:13.098538Z","signed_message":"canonical_sha256_bytes"},"source_id":"1704.02321","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4337e772208b083c824fd4b3a63fcd9af1dea7b283ac6d28e81bf82a935d1ed6","sha256:e10e14bff0ed28c332cadcc7c9fb736209beaf64b85eed887e80009880fd4e4b"],"state_sha256":"ed73f2629aad0f1bcf47aefd00e715619045495aac65b480782546169a623d6b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mF4wwEFbqam3dOILpna2wj31KZlnKHfbj5XdTWNqnGApWrQIBBv/bRkLBs+q1ECd29KDdnFe2USpRaHiY4BzDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T20:49:10.203027Z","bundle_sha256":"0fab047af6c39ac56397b8ef005f0be0e4b2addb4e8ae5ccf4eb12b3f11d8f8a"}}