{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:472BRVHJITCWLAOQLSKV3XH45P","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":"0f60f222e3fe95db3cf9f7808956f878f4a9915096e03addd6ede212eba4467e","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-09-10T19:32:10Z","title_canon_sha256":"b9f0b7918f8f5d86f146123e77d2ccde65740e4d8f52aaa103b7fada0fb8b5fd"},"schema_version":"1.0","source":{"id":"0909.1804","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.1804","created_at":"2026-05-18T02:34:30Z"},{"alias_kind":"arxiv_version","alias_value":"0909.1804v2","created_at":"2026-05-18T02:34:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.1804","created_at":"2026-05-18T02:34:30Z"},{"alias_kind":"pith_short_12","alias_value":"472BRVHJITCW","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"472BRVHJITCWLAOQ","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"472BRVHJ","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:1cb08fd942d5be5f5b2e28a82a1b70fdbb670f10a041454fda6866bea9e0bbae","target":"graph","created_at":"2026-05-18T02:34:30Z","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":"[Abridged] We present the first comprehensive analysis of HST observations of short-duration gamma-ray burst (GRB) host galaxies. These observations allow us to characterize the galactic and local environments of short GRBs as a powerful constraint on the nature of their progenitors. Using the HST data for 10 short GRB hosts we determine the host morphological properties, measure precise physical and host-normalized offsets relative to the galaxy centers, and study the locations of short GRBs relative to their host light distributions. We find that most short GRB hosts have exponential disk pr","authors_text":"Derek B. Fox (PSU), Edo Berger (Harvard), Wen-fai Fong (Harvard)","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-09-10T19:32:10Z","title":"Hubble Space Telescope Observations of Short GRB Host Galaxies: Morphologies, Offsets, and Local Environments"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.1804","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":"sha256:9b03e72e2f1c1a2e12daef3bb95eab8c5b676bc916d0955b35f051b4a85c1998","target":"record","created_at":"2026-05-18T02:34:30Z","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":"0f60f222e3fe95db3cf9f7808956f878f4a9915096e03addd6ede212eba4467e","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-09-10T19:32:10Z","title_canon_sha256":"b9f0b7918f8f5d86f146123e77d2ccde65740e4d8f52aaa103b7fada0fb8b5fd"},"schema_version":"1.0","source":{"id":"0909.1804","kind":"arxiv","version":2}},"canonical_sha256":"e7f418d4e944c56581d05c955ddcfcebec44da800852e3e31ecd684ccf2a7ea1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e7f418d4e944c56581d05c955ddcfcebec44da800852e3e31ecd684ccf2a7ea1","first_computed_at":"2026-05-18T02:34:30.618748Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:34:30.618748Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"bWYDTr/sK7Z5J9dXP9V7nX0m76EQ/Ak3a9qbKbSnWwioeByZ84DO4qA7OJKhmkZONVXwkd209kXP03fXAy7sBw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:34:30.619302Z","signed_message":"canonical_sha256_bytes"},"source_id":"0909.1804","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9b03e72e2f1c1a2e12daef3bb95eab8c5b676bc916d0955b35f051b4a85c1998","sha256:1cb08fd942d5be5f5b2e28a82a1b70fdbb670f10a041454fda6866bea9e0bbae"],"state_sha256":"6fc9b4a62e24e5e2f2fd6a97e00a0b0a5a7018a6e90a0d78b7e278acfd081442"}