{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:3EUXZ7H4DJKIIGYK2C6DO5KCSZ","short_pith_number":"pith:3EUXZ7H4","canonical_record":{"source":{"id":"2002.12369","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-02-27T19:00:00Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"89d1139605e7bc06e24256fa1c2773f175bf5713f3760682f4fe25e3684df5d3","abstract_canon_sha256":"ed0839abf029cbe6044c95c67ec8daffe57aa0f18f87c3a3bc1a227dd0b6b932"},"schema_version":"1.0"},"canonical_sha256":"d9297cfcfc1a54841b0ad0bc377542967a6181ea51c3ba8974817af50d223ada","source":{"kind":"arxiv","id":"2002.12369","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2002.12369","created_at":"2026-07-05T01:08:12Z"},{"alias_kind":"arxiv_version","alias_value":"2002.12369v2","created_at":"2026-07-05T01:08:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2002.12369","created_at":"2026-07-05T01:08:12Z"},{"alias_kind":"pith_short_12","alias_value":"3EUXZ7H4DJKI","created_at":"2026-07-05T01:08:12Z"},{"alias_kind":"pith_short_16","alias_value":"3EUXZ7H4DJKIIGYK","created_at":"2026-07-05T01:08:12Z"},{"alias_kind":"pith_short_8","alias_value":"3EUXZ7H4","created_at":"2026-07-05T01:08:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:3EUXZ7H4DJKIIGYK2C6DO5KCSZ","target":"record","payload":{"canonical_record":{"source":{"id":"2002.12369","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-02-27T19:00:00Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"89d1139605e7bc06e24256fa1c2773f175bf5713f3760682f4fe25e3684df5d3","abstract_canon_sha256":"ed0839abf029cbe6044c95c67ec8daffe57aa0f18f87c3a3bc1a227dd0b6b932"},"schema_version":"1.0"},"canonical_sha256":"d9297cfcfc1a54841b0ad0bc377542967a6181ea51c3ba8974817af50d223ada","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:08:12.195756Z","signature_b64":"YbtWc/hCZ/+coSyN0wRat/S0Z1wnW/DfnEexguzw+lrn05YlImELFcfobikBI/ULRrN9/e5VrbhGM2Yzz68GDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d9297cfcfc1a54841b0ad0bc377542967a6181ea51c3ba8974817af50d223ada","last_reissued_at":"2026-07-05T01:08:12.195239Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:08:12.195239Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2002.12369","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":"2026-07-05T01:08:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"I7qh+31x1UeIH+Tnkksr38/EbyDOtV/kL0yqeGtBYmGafm0DDr1w9QvGg1KMaYVzgg/wc7PSDm+r9TCMyiIsCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T05:27:23.868006Z"},"content_sha256":"299882ffe35f1013043e09fee55fe2bddd8980a741cb89efbe8541ada0c86490","schema_version":"1.0","event_id":"sha256:299882ffe35f1013043e09fee55fe2bddd8980a741cb89efbe8541ada0c86490"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:3EUXZ7H4DJKIIGYK2C6DO5KCSZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Curious Case of PHL 293B: A Long-Lived Transient in a Metal-Poor Blue Compact Dwarf Galaxy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"Alistair R. Walker, Andres A. Plazas, Antonella Palmese, Aurelio Carnero Rosell, Basilio Santiago, Colin J. Burke, Daniel Gruen, David Brooks, David J. James, DES Collaboration, Devon L. Hollowood, Douglas L. Tucker, Elisabeth Krause, Emmanuel Bertin, Enrique Gaztanaga, Eric Suchyta, Eusebio Sanchez, Felipe Menanteau, Francisco Paz-Chinchon, Gaston Gutierrez, Gregory Tarle, Hengxiao Guo, Ignacio Sevilla-Noarbe, Jorge Carretero, Josh Frieman, Juan De Vicente, Juan Garcia-Bellido, Julia Gschwend, Kenneth Herner, Klaus Honscheid, Kyler Kuehn, Luiz N. Da Costa, Marcelle Soares-Santos, Marcio A. G. Maia, Mathew Smith, Matias Carrasco Kind, Michel Aguena, Molly E. C. Swanson, Peter Doel, Ramon Miquel, Robert A. Gruendl, Ryan J. Foley, Sahar Allam, Santiago Avila, Santiago Serrano, Shantanu Desai, Spencer Everett, Tamas Norbert Varga, Tim F. Eifler, Tim M. C. Abbott, Vic Scarpine, Vivienne F. Baldassare, Xin Liu, Yue Shen","submitted_at":"2020-02-27T19:00:00Z","abstract_excerpt":"We report on small-amplitude optical variability and recent dissipation of the unusually persistent broad emission lines in the blue compact dwarf galaxy PHL 293B. The galaxy's unusual spectral features (P Cygni-like profiles with $\\sim$800 km s$^{-1}$ blueshifted absorption lines) have resulted in conflicting interpretations of the nature of this source in the literature. However, analysis of new Gemini spectroscopy reveals the broad emission has begun to fade after being persistent for over a decade prior. Precise difference imaging light curves constructed with the Sloan Digital Sky Survey "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2002.12369","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2002.12369/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T01:08:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Nha2asyA3DFUzJDuJHGODdbR/oWcFAXmt2ZSFfPU67v1VOi8WZbTRV1zpwz9rpbMSTHK+XhpnOSxA5Bv+UBkAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T05:27:23.868417Z"},"content_sha256":"750e11d5ae5b7c0107f208f70321c32c728af1e21e8a3440771528459d75b866","schema_version":"1.0","event_id":"sha256:750e11d5ae5b7c0107f208f70321c32c728af1e21e8a3440771528459d75b866"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3EUXZ7H4DJKIIGYK2C6DO5KCSZ/bundle.json","state_url":"https://pith.science/pith/3EUXZ7H4DJKIIGYK2C6DO5KCSZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3EUXZ7H4DJKIIGYK2C6DO5KCSZ/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":"2026-07-07T05:27:23Z","links":{"resolver":"https://pith.science/pith/3EUXZ7H4DJKIIGYK2C6DO5KCSZ","bundle":"https://pith.science/pith/3EUXZ7H4DJKIIGYK2C6DO5KCSZ/bundle.json","state":"https://pith.science/pith/3EUXZ7H4DJKIIGYK2C6DO5KCSZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3EUXZ7H4DJKIIGYK2C6DO5KCSZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:3EUXZ7H4DJKIIGYK2C6DO5KCSZ","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":"ed0839abf029cbe6044c95c67ec8daffe57aa0f18f87c3a3bc1a227dd0b6b932","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-02-27T19:00:00Z","title_canon_sha256":"89d1139605e7bc06e24256fa1c2773f175bf5713f3760682f4fe25e3684df5d3"},"schema_version":"1.0","source":{"id":"2002.12369","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2002.12369","created_at":"2026-07-05T01:08:12Z"},{"alias_kind":"arxiv_version","alias_value":"2002.12369v2","created_at":"2026-07-05T01:08:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2002.12369","created_at":"2026-07-05T01:08:12Z"},{"alias_kind":"pith_short_12","alias_value":"3EUXZ7H4DJKI","created_at":"2026-07-05T01:08:12Z"},{"alias_kind":"pith_short_16","alias_value":"3EUXZ7H4DJKIIGYK","created_at":"2026-07-05T01:08:12Z"},{"alias_kind":"pith_short_8","alias_value":"3EUXZ7H4","created_at":"2026-07-05T01:08:12Z"}],"graph_snapshots":[{"event_id":"sha256:750e11d5ae5b7c0107f208f70321c32c728af1e21e8a3440771528459d75b866","target":"graph","created_at":"2026-07-05T01:08:12Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2002.12369/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report on small-amplitude optical variability and recent dissipation of the unusually persistent broad emission lines in the blue compact dwarf galaxy PHL 293B. The galaxy's unusual spectral features (P Cygni-like profiles with $\\sim$800 km s$^{-1}$ blueshifted absorption lines) have resulted in conflicting interpretations of the nature of this source in the literature. However, analysis of new Gemini spectroscopy reveals the broad emission has begun to fade after being persistent for over a decade prior. Precise difference imaging light curves constructed with the Sloan Digital Sky Survey ","authors_text":"Alistair R. Walker, Andres A. Plazas, Antonella Palmese, Aurelio Carnero Rosell, Basilio Santiago, Colin J. Burke, Daniel Gruen, David Brooks, David J. James, DES Collaboration, Devon L. Hollowood, Douglas L. Tucker, Elisabeth Krause, Emmanuel Bertin, Enrique Gaztanaga, Eric Suchyta, Eusebio Sanchez, Felipe Menanteau, Francisco Paz-Chinchon, Gaston Gutierrez, Gregory Tarle, Hengxiao Guo, Ignacio Sevilla-Noarbe, Jorge Carretero, Josh Frieman, Juan De Vicente, Juan Garcia-Bellido, Julia Gschwend, Kenneth Herner, Klaus Honscheid, Kyler Kuehn, Luiz N. Da Costa, Marcelle Soares-Santos, Marcio A. G. Maia, Mathew Smith, Matias Carrasco Kind, Michel Aguena, Molly E. C. Swanson, Peter Doel, Ramon Miquel, Robert A. Gruendl, Ryan J. Foley, Sahar Allam, Santiago Avila, Santiago Serrano, Shantanu Desai, Spencer Everett, Tamas Norbert Varga, Tim F. Eifler, Tim M. C. Abbott, Vic Scarpine, Vivienne F. Baldassare, Xin Liu, Yue Shen","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-02-27T19:00:00Z","title":"The Curious Case of PHL 293B: A Long-Lived Transient in a Metal-Poor Blue Compact Dwarf Galaxy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2002.12369","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":"sha256:299882ffe35f1013043e09fee55fe2bddd8980a741cb89efbe8541ada0c86490","target":"record","created_at":"2026-07-05T01:08:12Z","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":"ed0839abf029cbe6044c95c67ec8daffe57aa0f18f87c3a3bc1a227dd0b6b932","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-02-27T19:00:00Z","title_canon_sha256":"89d1139605e7bc06e24256fa1c2773f175bf5713f3760682f4fe25e3684df5d3"},"schema_version":"1.0","source":{"id":"2002.12369","kind":"arxiv","version":2}},"canonical_sha256":"d9297cfcfc1a54841b0ad0bc377542967a6181ea51c3ba8974817af50d223ada","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d9297cfcfc1a54841b0ad0bc377542967a6181ea51c3ba8974817af50d223ada","first_computed_at":"2026-07-05T01:08:12.195239Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:08:12.195239Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"YbtWc/hCZ/+coSyN0wRat/S0Z1wnW/DfnEexguzw+lrn05YlImELFcfobikBI/ULRrN9/e5VrbhGM2Yzz68GDg==","signature_status":"signed_v1","signed_at":"2026-07-05T01:08:12.195756Z","signed_message":"canonical_sha256_bytes"},"source_id":"2002.12369","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:299882ffe35f1013043e09fee55fe2bddd8980a741cb89efbe8541ada0c86490","sha256:750e11d5ae5b7c0107f208f70321c32c728af1e21e8a3440771528459d75b866"],"state_sha256":"866bc109b40220eb13ac4cba4bcd045a593aad0c2e28db4022d79563ae202bc8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"shhwSxG4MrFJGvWzY2ehLYBU8s8+y8eJ2BeRyJ14+RdDnWe9DL4jBcLeDA0cnKTSPjP5webXiAdMyXOLYbZpDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T05:27:23.870800Z","bundle_sha256":"da37896351c130d8ab3d5b6e1d6874ee4917dce59e61e3e1fad5de01f7d7407d"}}