{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:L6RCBDZ3XTYXC3LN6GAU2IDHDY","short_pith_number":"pith:L6RCBDZ3","canonical_record":{"source":{"id":"2306.15833","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-06-27T23:34:22Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"bd08285d491a66bc781df36c62aa6f64b963292e8352aa36a223ea1fc5771cab","abstract_canon_sha256":"608cf4a36cf9a19c75de976f00d7d826e42a6da4173f549f36740725c2acc9e6"},"schema_version":"1.0"},"canonical_sha256":"5fa2208f3bbcf1716d6df1814d20671e009af562eabd0d40dd29a895e5451844","source":{"kind":"arxiv","id":"2306.15833","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2306.15833","created_at":"2026-07-05T06:25:44Z"},{"alias_kind":"arxiv_version","alias_value":"2306.15833v1","created_at":"2026-07-05T06:25:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2306.15833","created_at":"2026-07-05T06:25:44Z"},{"alias_kind":"pith_short_12","alias_value":"L6RCBDZ3XTYX","created_at":"2026-07-05T06:25:44Z"},{"alias_kind":"pith_short_16","alias_value":"L6RCBDZ3XTYXC3LN","created_at":"2026-07-05T06:25:44Z"},{"alias_kind":"pith_short_8","alias_value":"L6RCBDZ3","created_at":"2026-07-05T06:25:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:L6RCBDZ3XTYXC3LN6GAU2IDHDY","target":"record","payload":{"canonical_record":{"source":{"id":"2306.15833","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-06-27T23:34:22Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"bd08285d491a66bc781df36c62aa6f64b963292e8352aa36a223ea1fc5771cab","abstract_canon_sha256":"608cf4a36cf9a19c75de976f00d7d826e42a6da4173f549f36740725c2acc9e6"},"schema_version":"1.0"},"canonical_sha256":"5fa2208f3bbcf1716d6df1814d20671e009af562eabd0d40dd29a895e5451844","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:25:44.963772Z","signature_b64":"WROAQEj8zo441ZMlNy/UZcVwCIRGFBbnzXgoSgo+89KlI6pGJ6oY0/L1E3fPbiSseDXdHAPXgu7Hx/p8udrsCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5fa2208f3bbcf1716d6df1814d20671e009af562eabd0d40dd29a895e5451844","last_reissued_at":"2026-07-05T06:25:44.963299Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:25:44.963299Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2306.15833","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":"2026-07-05T06:25:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"swJD6Vt+JEGXBC9XaEy7/p0n5rknifZMUZQHjj7WWgxr2JA6JWul5w90S4yEQZUEEOqTZqp44YUyLx0JmsuPAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T18:36:16.309578Z"},"content_sha256":"87d5c7accc74bc8ae55af57412ae0b44cfcce710918488cb2aa730582d80200a","schema_version":"1.0","event_id":"sha256:87d5c7accc74bc8ae55af57412ae0b44cfcce710918488cb2aa730582d80200a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:L6RCBDZ3XTYXC3LN6GAU2IDHDY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The LIGO HET Response (LIGHETR) Project to Discover and Spectroscopically Follow Optical Transients Associated with Neutron Star Mergers","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.HE","authors_text":"Aaron Zimmerman, Benjamin P. Thomas, Chris Fryer, David J. Sand, David Pooley, Frederic V. Hessman, Greg Zeimann, Hsin-Yu Chen, J. Craig Wheeler, Jozsef Vinko, Karl Gebhardt, Kaylee M. de Soto, Kristen B. McQuinn, Lifan Wang, Matthew Shetrone, M. J. Bustamante-Rosell, Oleg Korobkin, Pawan Kumar, Richard Matzner, Ryan Wollaeger, S. Karthik Yadavalli, Steven Janowiecki, V. Ashley Villar","submitted_at":"2023-06-27T23:34:22Z","abstract_excerpt":"The LIGO HET Response (LIGHETR) project is an enterprise to follow up optical transients (OT) discovered as gravitational wave merger sources by the LIGO/Virgo collaboration (LVC). Early spectroscopy has the potential to constrain crucial parameters such as the aspect angle. The LIGHETR collaboration also includes the capacity to model the spectroscopic evolution of mergers to facilitate a real-time direct comparison of models with our data. The principal facility is the Hobby-Eberly Telescope. LIGHETR uses the massively-replicated VIRUS array of spectrographs to search for associated OTs and "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2306.15833","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2306.15833/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":"2026-07-05T06:25:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/DOYqpM3xmGGmMe2OiZaf44U7PiZHXHBoSckc9IHxZUFa1qAW73r+HfLck54U+fDY4zfuE+nutBpdvbnfffjAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T18:36:16.310081Z"},"content_sha256":"a1e1f5552cf7454dacaeeeded0590344a693d510749e5bbbece3849ebd23a7ef","schema_version":"1.0","event_id":"sha256:a1e1f5552cf7454dacaeeeded0590344a693d510749e5bbbece3849ebd23a7ef"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/L6RCBDZ3XTYXC3LN6GAU2IDHDY/bundle.json","state_url":"https://pith.science/pith/L6RCBDZ3XTYXC3LN6GAU2IDHDY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/L6RCBDZ3XTYXC3LN6GAU2IDHDY/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":"2026-08-23T18:36:16Z","links":{"resolver":"https://pith.science/pith/L6RCBDZ3XTYXC3LN6GAU2IDHDY","bundle":"https://pith.science/pith/L6RCBDZ3XTYXC3LN6GAU2IDHDY/bundle.json","state":"https://pith.science/pith/L6RCBDZ3XTYXC3LN6GAU2IDHDY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/L6RCBDZ3XTYXC3LN6GAU2IDHDY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:L6RCBDZ3XTYXC3LN6GAU2IDHDY","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":"608cf4a36cf9a19c75de976f00d7d826e42a6da4173f549f36740725c2acc9e6","cross_cats_sorted":["astro-ph.IM"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-06-27T23:34:22Z","title_canon_sha256":"bd08285d491a66bc781df36c62aa6f64b963292e8352aa36a223ea1fc5771cab"},"schema_version":"1.0","source":{"id":"2306.15833","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2306.15833","created_at":"2026-07-05T06:25:44Z"},{"alias_kind":"arxiv_version","alias_value":"2306.15833v1","created_at":"2026-07-05T06:25:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2306.15833","created_at":"2026-07-05T06:25:44Z"},{"alias_kind":"pith_short_12","alias_value":"L6RCBDZ3XTYX","created_at":"2026-07-05T06:25:44Z"},{"alias_kind":"pith_short_16","alias_value":"L6RCBDZ3XTYXC3LN","created_at":"2026-07-05T06:25:44Z"},{"alias_kind":"pith_short_8","alias_value":"L6RCBDZ3","created_at":"2026-07-05T06:25:44Z"}],"graph_snapshots":[{"event_id":"sha256:a1e1f5552cf7454dacaeeeded0590344a693d510749e5bbbece3849ebd23a7ef","target":"graph","created_at":"2026-07-05T06:25:44Z","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/2306.15833/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The LIGO HET Response (LIGHETR) project is an enterprise to follow up optical transients (OT) discovered as gravitational wave merger sources by the LIGO/Virgo collaboration (LVC). Early spectroscopy has the potential to constrain crucial parameters such as the aspect angle. The LIGHETR collaboration also includes the capacity to model the spectroscopic evolution of mergers to facilitate a real-time direct comparison of models with our data. The principal facility is the Hobby-Eberly Telescope. LIGHETR uses the massively-replicated VIRUS array of spectrographs to search for associated OTs and ","authors_text":"Aaron Zimmerman, Benjamin P. Thomas, Chris Fryer, David J. Sand, David Pooley, Frederic V. Hessman, Greg Zeimann, Hsin-Yu Chen, J. Craig Wheeler, Jozsef Vinko, Karl Gebhardt, Kaylee M. de Soto, Kristen B. McQuinn, Lifan Wang, Matthew Shetrone, M. J. Bustamante-Rosell, Oleg Korobkin, Pawan Kumar, Richard Matzner, Ryan Wollaeger, S. Karthik Yadavalli, Steven Janowiecki, V. Ashley Villar","cross_cats":["astro-ph.IM"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-06-27T23:34:22Z","title":"The LIGO HET Response (LIGHETR) Project to Discover and Spectroscopically Follow Optical Transients Associated with Neutron Star Mergers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2306.15833","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":"sha256:87d5c7accc74bc8ae55af57412ae0b44cfcce710918488cb2aa730582d80200a","target":"record","created_at":"2026-07-05T06:25:44Z","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":"608cf4a36cf9a19c75de976f00d7d826e42a6da4173f549f36740725c2acc9e6","cross_cats_sorted":["astro-ph.IM"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-06-27T23:34:22Z","title_canon_sha256":"bd08285d491a66bc781df36c62aa6f64b963292e8352aa36a223ea1fc5771cab"},"schema_version":"1.0","source":{"id":"2306.15833","kind":"arxiv","version":1}},"canonical_sha256":"5fa2208f3bbcf1716d6df1814d20671e009af562eabd0d40dd29a895e5451844","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5fa2208f3bbcf1716d6df1814d20671e009af562eabd0d40dd29a895e5451844","first_computed_at":"2026-07-05T06:25:44.963299Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:25:44.963299Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WROAQEj8zo441ZMlNy/UZcVwCIRGFBbnzXgoSgo+89KlI6pGJ6oY0/L1E3fPbiSseDXdHAPXgu7Hx/p8udrsCA==","signature_status":"signed_v1","signed_at":"2026-07-05T06:25:44.963772Z","signed_message":"canonical_sha256_bytes"},"source_id":"2306.15833","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:87d5c7accc74bc8ae55af57412ae0b44cfcce710918488cb2aa730582d80200a","sha256:a1e1f5552cf7454dacaeeeded0590344a693d510749e5bbbece3849ebd23a7ef"],"state_sha256":"47773658b476d5b31f07758740434c9033a76c402d47bb2d37a16b585158e2cd"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tZpZlMv/4zJJSf4aE/fIfWNWcTYujcV3yvq5IiV4idTDb2cEg2ByxyXU/8n26oaHnUrRldgvlemDFMJJp7nXAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-23T18:36:16.313728Z","bundle_sha256":"cfa21a2460d5641b9f18716a76e0d2b35ffac65ebafa08c79e22f4d92ad2ea92"}}