{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:DKJVDZ5MCX5VC4DZPGHRWAVRLJ","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":"d3118e235b9f29b0f77b047424c2f1b29f7c4d6d7df0cd2eed8b472bed2d913a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-09-10T05:19:51Z","title_canon_sha256":"ef791ba387263b6025bab609df94e44f27cd3c05c0d069846e523bd60cb21c5d"},"schema_version":"1.0","source":{"id":"0809.1648","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0809.1648","created_at":"2026-07-04T23:54:38Z"},{"alias_kind":"arxiv_version","alias_value":"0809.1648v1","created_at":"2026-07-04T23:54:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0809.1648","created_at":"2026-07-04T23:54:38Z"},{"alias_kind":"pith_short_12","alias_value":"DKJVDZ5MCX5V","created_at":"2026-07-04T23:54:38Z"},{"alias_kind":"pith_short_16","alias_value":"DKJVDZ5MCX5VC4DZ","created_at":"2026-07-04T23:54:38Z"},{"alias_kind":"pith_short_8","alias_value":"DKJVDZ5M","created_at":"2026-07-04T23:54:38Z"}],"graph_snapshots":[{"event_id":"sha256:c09e7daa48c7ccfa0fb2525bb6f5e2d549f9c61bb9d7218a336266a709a3db2e","target":"graph","created_at":"2026-07-04T23:54:38Z","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/0809.1648/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present observations of SCP 06F6, an unusual optical transient discovered during the Hubble Space Telescope Cluster Supernova Survey. The transient brightened over a period of ~100 days, reached a peak magnitude of ~21.0 in both i_775 and z_850, and then declined over a similar timescale. There is no host galaxy or progenitor star detected at the location of the transient to a 3 sigma upper limit of i_775 = 26.4 and z_850 = 26.1, giving a corresponding lower limit on the flux increase of a factor of ~120. Multiple spectra show five broad absorption bands between 4100 AA and 6500 AA and a mo","authors_text":"A. Goobar, A. Gude, A. L. Spadafora, A. S. Fruchter, C. Lidman, D. Rubin, D. Schlegel, G. Aldering, G. Goldhaber, H. K. Swift, J. Meyers, K. Barbary, K. Konishi, K. S. Dawson, K. Tokita, L. Faccioli, M. Doi, M. Kowalski, N. Suzuki, N. Takanashi, N. V. Connolly, N. Yasuda (for the Supernova Cosmology Project), P. Nugent, R. Amanullah, R. C. Thomas, S. Perlmutter, T. Morokuma, V. Fadeyev, X. Huang, Y. Ihara","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-09-10T05:19:51Z","title":"Discovery of an Unusual Optical Transient with the Hubble Space Telescope"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0809.1648","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:eaf6fcf73eb40b14361062d7332dc1e1703abb43bfd2a2a845a8f87c8b4e5355","target":"record","created_at":"2026-07-04T23:54:38Z","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":"d3118e235b9f29b0f77b047424c2f1b29f7c4d6d7df0cd2eed8b472bed2d913a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-09-10T05:19:51Z","title_canon_sha256":"ef791ba387263b6025bab609df94e44f27cd3c05c0d069846e523bd60cb21c5d"},"schema_version":"1.0","source":{"id":"0809.1648","kind":"arxiv","version":1}},"canonical_sha256":"1a9351e7ac15fb517079798f1b02b15a533836550518d3ab3838363f6cffc5c2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1a9351e7ac15fb517079798f1b02b15a533836550518d3ab3838363f6cffc5c2","first_computed_at":"2026-07-04T23:54:38.597101Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T23:54:38.597101Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3AVMecDnZ1Y+KBMowiWQgzAn4747kSTMcmbC2ar5J/1WzjaMFDU8EukWZIzanTyWHRtDlbJLiN8qOAHsBe+YBA==","signature_status":"signed_v1","signed_at":"2026-07-04T23:54:38.597501Z","signed_message":"canonical_sha256_bytes"},"source_id":"0809.1648","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eaf6fcf73eb40b14361062d7332dc1e1703abb43bfd2a2a845a8f87c8b4e5355","sha256:c09e7daa48c7ccfa0fb2525bb6f5e2d549f9c61bb9d7218a336266a709a3db2e"],"state_sha256":"38831694dcaabc45365edbe3645d67822b7ea8adee28c554bc9e4b0634030dd9"}