{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:EHDTIPMJQIJWU2RROTOIRZ6HLQ","short_pith_number":"pith:EHDTIPMJ","canonical_record":{"source":{"id":"1209.5741","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-09-25T20:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"bb9782fd012804dc1fda87a0b4c6d192bfb358d8646e8ae6c1f7a9eb5a6b582b","abstract_canon_sha256":"913af41bfcddd1d77371a9008e1f57121d548daafe1649dac397b506d10d6605"},"schema_version":"1.0"},"canonical_sha256":"21c7343d8982136a6a3174dc88e7c75c26fab7242ac25300d19aa2f272e25c07","source":{"kind":"arxiv","id":"1209.5741","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.5741","created_at":"2026-05-18T01:54:18Z"},{"alias_kind":"arxiv_version","alias_value":"1209.5741v1","created_at":"2026-05-18T01:54:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.5741","created_at":"2026-05-18T01:54:18Z"},{"alias_kind":"pith_short_12","alias_value":"EHDTIPMJQIJW","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_16","alias_value":"EHDTIPMJQIJWU2RR","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_8","alias_value":"EHDTIPMJ","created_at":"2026-05-18T12:27:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:EHDTIPMJQIJWU2RROTOIRZ6HLQ","target":"record","payload":{"canonical_record":{"source":{"id":"1209.5741","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-09-25T20:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"bb9782fd012804dc1fda87a0b4c6d192bfb358d8646e8ae6c1f7a9eb5a6b582b","abstract_canon_sha256":"913af41bfcddd1d77371a9008e1f57121d548daafe1649dac397b506d10d6605"},"schema_version":"1.0"},"canonical_sha256":"21c7343d8982136a6a3174dc88e7c75c26fab7242ac25300d19aa2f272e25c07","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:54:18.877299Z","signature_b64":"JiowIeT+CxtRHap9qhdejOTSdPhQlwl95AogitgObZqgz0myWv1XeMVwdKTU4XfEgq+dovqYKzOgbtKC48gsAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"21c7343d8982136a6a3174dc88e7c75c26fab7242ac25300d19aa2f272e25c07","last_reissued_at":"2026-05-18T01:54:18.876871Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:54:18.876871Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1209.5741","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":"2026-05-18T01:54:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Xozy5do4wPr++doezUKvRIUD0nQrvSHnHTSa9d7QP3QqlQ5BcqjuBmb1PCHo3bZTRJIzEYfQy4Fp6Jyh7pU7CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T11:50:22.462551Z"},"content_sha256":"555e5b3b8d3bf8c9171f27a1867c449b12973672917f0199943832fdb1b2e4ae","schema_version":"1.0","event_id":"sha256:555e5b3b8d3bf8c9171f27a1867c449b12973672917f0199943832fdb1b2e4ae"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:EHDTIPMJQIJWU2RROTOIRZ6HLQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Hubble Space Telescope H-alpha imaging of star-forming galaxies at z = 1-1.5: evolution in the size and luminosity of giant HII regions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"(2) - Caltech, 3), (3) - CRAL Observatoire de Lyon, (4) - NASA Goddard Space Flight Center, (5) - IfA, (6) - Leiden Observatory), A. M. Swinbank (1), Durham University, H. Ebeling (5), Ian Smail (1), J. Richard (1, J. R. Rigby (4), R. A. Crain (6) ((1) - ICC, R. C. Livermore (1), R. G. Bower (1), R. S. Ellis (2), T. Jones (2), University of Hawaii","submitted_at":"2012-09-25T20:00:00Z","abstract_excerpt":"We present HST/WFC3 narrowband imaging of the H-alpha emission in a sample of eight gravitationally-lensed galaxies at z = 1 - 1.5. The magnification caused by the foreground clusters enables us to obtain a median source plane spatial resolution of 360pc, as well as providing magnifications in flux ranging from ~10x to ~50x. This enables us to identify resolved star-forming HII regions at this epoch and therefore study their H-alpha luminosity distributions for comparisons with equivalent samples at z ~ 2 and in the local Universe. We find evolution in the both luminosity and surface brightnes"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.5741","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":"2026-05-18T01:54:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qejoD/G8+2zFmmpNPCwzURiPAMyDi+tq/xM4w+OtPJyj472don1AzAWJUiNRJIw4XFfGLHtNuNr0CXhreGxcCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T11:50:22.462982Z"},"content_sha256":"2e1137705750b56fae2e6eb8a58b8d72b26153b9c1b7131d0ad4eeb4cce98cdf","schema_version":"1.0","event_id":"sha256:2e1137705750b56fae2e6eb8a58b8d72b26153b9c1b7131d0ad4eeb4cce98cdf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EHDTIPMJQIJWU2RROTOIRZ6HLQ/bundle.json","state_url":"https://pith.science/pith/EHDTIPMJQIJWU2RROTOIRZ6HLQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EHDTIPMJQIJWU2RROTOIRZ6HLQ/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":"2026-05-20T11:50:22Z","links":{"resolver":"https://pith.science/pith/EHDTIPMJQIJWU2RROTOIRZ6HLQ","bundle":"https://pith.science/pith/EHDTIPMJQIJWU2RROTOIRZ6HLQ/bundle.json","state":"https://pith.science/pith/EHDTIPMJQIJWU2RROTOIRZ6HLQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EHDTIPMJQIJWU2RROTOIRZ6HLQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:EHDTIPMJQIJWU2RROTOIRZ6HLQ","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":"913af41bfcddd1d77371a9008e1f57121d548daafe1649dac397b506d10d6605","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-09-25T20:00:00Z","title_canon_sha256":"bb9782fd012804dc1fda87a0b4c6d192bfb358d8646e8ae6c1f7a9eb5a6b582b"},"schema_version":"1.0","source":{"id":"1209.5741","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.5741","created_at":"2026-05-18T01:54:18Z"},{"alias_kind":"arxiv_version","alias_value":"1209.5741v1","created_at":"2026-05-18T01:54:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.5741","created_at":"2026-05-18T01:54:18Z"},{"alias_kind":"pith_short_12","alias_value":"EHDTIPMJQIJW","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_16","alias_value":"EHDTIPMJQIJWU2RR","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_8","alias_value":"EHDTIPMJ","created_at":"2026-05-18T12:27:04Z"}],"graph_snapshots":[{"event_id":"sha256:2e1137705750b56fae2e6eb8a58b8d72b26153b9c1b7131d0ad4eeb4cce98cdf","target":"graph","created_at":"2026-05-18T01:54:18Z","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 HST/WFC3 narrowband imaging of the H-alpha emission in a sample of eight gravitationally-lensed galaxies at z = 1 - 1.5. The magnification caused by the foreground clusters enables us to obtain a median source plane spatial resolution of 360pc, as well as providing magnifications in flux ranging from ~10x to ~50x. This enables us to identify resolved star-forming HII regions at this epoch and therefore study their H-alpha luminosity distributions for comparisons with equivalent samples at z ~ 2 and in the local Universe. We find evolution in the both luminosity and surface brightnes","authors_text":"(2) - Caltech, 3), (3) - CRAL Observatoire de Lyon, (4) - NASA Goddard Space Flight Center, (5) - IfA, (6) - Leiden Observatory), A. M. Swinbank (1), Durham University, H. Ebeling (5), Ian Smail (1), J. Richard (1, J. R. Rigby (4), R. A. Crain (6) ((1) - ICC, R. C. Livermore (1), R. G. Bower (1), R. S. Ellis (2), T. Jones (2), University of Hawaii","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-09-25T20:00:00Z","title":"Hubble Space Telescope H-alpha imaging of star-forming galaxies at z = 1-1.5: evolution in the size and luminosity of giant HII regions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.5741","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":"sha256:555e5b3b8d3bf8c9171f27a1867c449b12973672917f0199943832fdb1b2e4ae","target":"record","created_at":"2026-05-18T01:54:18Z","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":"913af41bfcddd1d77371a9008e1f57121d548daafe1649dac397b506d10d6605","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-09-25T20:00:00Z","title_canon_sha256":"bb9782fd012804dc1fda87a0b4c6d192bfb358d8646e8ae6c1f7a9eb5a6b582b"},"schema_version":"1.0","source":{"id":"1209.5741","kind":"arxiv","version":1}},"canonical_sha256":"21c7343d8982136a6a3174dc88e7c75c26fab7242ac25300d19aa2f272e25c07","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"21c7343d8982136a6a3174dc88e7c75c26fab7242ac25300d19aa2f272e25c07","first_computed_at":"2026-05-18T01:54:18.876871Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:54:18.876871Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JiowIeT+CxtRHap9qhdejOTSdPhQlwl95AogitgObZqgz0myWv1XeMVwdKTU4XfEgq+dovqYKzOgbtKC48gsAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:54:18.877299Z","signed_message":"canonical_sha256_bytes"},"source_id":"1209.5741","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:555e5b3b8d3bf8c9171f27a1867c449b12973672917f0199943832fdb1b2e4ae","sha256:2e1137705750b56fae2e6eb8a58b8d72b26153b9c1b7131d0ad4eeb4cce98cdf"],"state_sha256":"ca34afef89fa9ed84d266562b287485cbb95be213df3708e39d14228284d741d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qxoAMg3xURYvXeOq3ZcxfSU9sW7ETh+syALcDkXw+2W0nZUb2bi3T14NJ1mw3hHc9iJuJb7QOjMcR1s2ivyHCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T11:50:22.465344Z","bundle_sha256":"d80083196404e528bffe0373047305389628e1344c1dc8262c885cd4db81da74"}}