{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:VNGI5SG6VBUDRU2QORN5B47LY3","short_pith_number":"pith:VNGI5SG6","canonical_record":{"source":{"id":"1602.04861","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-02-15T23:04:01Z","cross_cats_sorted":[],"title_canon_sha256":"69a1b8ee75daae5c41161d8defc4132bc38c1e2ed6f543f9da5db47aab8ef114","abstract_canon_sha256":"16d696c8f0c34c1a49f5b31e98ad7baa3c7bbc1d0ff202ee2bc4bade8663f402"},"schema_version":"1.0"},"canonical_sha256":"ab4c8ec8dea86838d350745bd0f3ebc6f7f8e47f775b98c02297231d8df5d468","source":{"kind":"arxiv","id":"1602.04861","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.04861","created_at":"2026-05-18T01:13:55Z"},{"alias_kind":"arxiv_version","alias_value":"1602.04861v1","created_at":"2026-05-18T01:13:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.04861","created_at":"2026-05-18T01:13:55Z"},{"alias_kind":"pith_short_12","alias_value":"VNGI5SG6VBUD","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_16","alias_value":"VNGI5SG6VBUDRU2Q","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_8","alias_value":"VNGI5SG6","created_at":"2026-05-18T12:30:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:VNGI5SG6VBUDRU2QORN5B47LY3","target":"record","payload":{"canonical_record":{"source":{"id":"1602.04861","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-02-15T23:04:01Z","cross_cats_sorted":[],"title_canon_sha256":"69a1b8ee75daae5c41161d8defc4132bc38c1e2ed6f543f9da5db47aab8ef114","abstract_canon_sha256":"16d696c8f0c34c1a49f5b31e98ad7baa3c7bbc1d0ff202ee2bc4bade8663f402"},"schema_version":"1.0"},"canonical_sha256":"ab4c8ec8dea86838d350745bd0f3ebc6f7f8e47f775b98c02297231d8df5d468","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:13:55.460091Z","signature_b64":"RW/xUEcNZ835ENR/37trZJZBM29ThkLdqD867qS/n8B0P/cCrx6zrshZyigDSBEe47LBsOOEOVUne690OId7Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ab4c8ec8dea86838d350745bd0f3ebc6f7f8e47f775b98c02297231d8df5d468","last_reissued_at":"2026-05-18T01:13:55.459581Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:13:55.459581Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1602.04861","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":"2026-05-18T01:13:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vg9gPTcwe4VoHNIz8lnIw4bZZZLTR+AE5XvBz2w/X/1hI14QmSJ4syk2+9XOIZ+sxlYrVk6vO3twIYKgdm1hAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T07:47:13.900592Z"},"content_sha256":"7335aa8eda8c198f0c1d8ff4e061709093bf65d96817ad6b966ff4dc25097f04","schema_version":"1.0","event_id":"sha256:7335aa8eda8c198f0c1d8ff4e061709093bf65d96817ad6b966ff4dc25097f04"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:VNGI5SG6VBUDRU2QORN5B47LY3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Version 1 of the Hubble Source Catalog","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Bradley C. Whitmore (STScI), Fermi National Accelerator Laboratory), Geoff Wallace (STScI), Lee Quick (STScI), Louis-Gregory Strolger (STScI), Richard L. White (STScI), Ronald A. Downes (STScI), Sahar S. Allam (STScI, S. Michael Fall (STScI), Stefano Casertano (STScI), Stephen H. Lubow (STScI), Tamas Budavari (JHU), Thomas Donaldson (STScI)","submitted_at":"2016-02-15T23:04:01Z","abstract_excerpt":"The Hubble Source Catalog is designed to help optimize science from the Hubble Space Telescope by combining the tens of thousands of visit-based source lists in the Hubble Legacy Archive into a single master catalog. Version 1 of the Hubble Source Catalog includes WFPC2, ACS/WFC, WFC3/UVIS, and WFC3/IR photometric data generated using SExtractor software to produce the individual source lists. The catalog includes roughly 80 million detections of 30 million objects involving 112 different detector/filter combinations, and about 160 thousand HST exposures. Source lists from Data Release 8 of th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.04861","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":"2026-05-18T01:13:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dFa03W7LWW16Wrpq4HJdf1KqcqvcW2yKj55AKixAEBI6ZoGwmpDE2N/m7ARr0cpP9z+ijLaSXcNQj78dXV4lAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T07:47:13.900944Z"},"content_sha256":"facb4ffdee8bf5c79f1d1b687eccb2f0628697d3d3009926fbab7e3ac9b021ec","schema_version":"1.0","event_id":"sha256:facb4ffdee8bf5c79f1d1b687eccb2f0628697d3d3009926fbab7e3ac9b021ec"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VNGI5SG6VBUDRU2QORN5B47LY3/bundle.json","state_url":"https://pith.science/pith/VNGI5SG6VBUDRU2QORN5B47LY3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VNGI5SG6VBUDRU2QORN5B47LY3/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":"2026-06-05T07:47:13Z","links":{"resolver":"https://pith.science/pith/VNGI5SG6VBUDRU2QORN5B47LY3","bundle":"https://pith.science/pith/VNGI5SG6VBUDRU2QORN5B47LY3/bundle.json","state":"https://pith.science/pith/VNGI5SG6VBUDRU2QORN5B47LY3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VNGI5SG6VBUDRU2QORN5B47LY3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:VNGI5SG6VBUDRU2QORN5B47LY3","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":"16d696c8f0c34c1a49f5b31e98ad7baa3c7bbc1d0ff202ee2bc4bade8663f402","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-02-15T23:04:01Z","title_canon_sha256":"69a1b8ee75daae5c41161d8defc4132bc38c1e2ed6f543f9da5db47aab8ef114"},"schema_version":"1.0","source":{"id":"1602.04861","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.04861","created_at":"2026-05-18T01:13:55Z"},{"alias_kind":"arxiv_version","alias_value":"1602.04861v1","created_at":"2026-05-18T01:13:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.04861","created_at":"2026-05-18T01:13:55Z"},{"alias_kind":"pith_short_12","alias_value":"VNGI5SG6VBUD","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_16","alias_value":"VNGI5SG6VBUDRU2Q","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_8","alias_value":"VNGI5SG6","created_at":"2026-05-18T12:30:48Z"}],"graph_snapshots":[{"event_id":"sha256:facb4ffdee8bf5c79f1d1b687eccb2f0628697d3d3009926fbab7e3ac9b021ec","target":"graph","created_at":"2026-05-18T01:13:55Z","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":"The Hubble Source Catalog is designed to help optimize science from the Hubble Space Telescope by combining the tens of thousands of visit-based source lists in the Hubble Legacy Archive into a single master catalog. Version 1 of the Hubble Source Catalog includes WFPC2, ACS/WFC, WFC3/UVIS, and WFC3/IR photometric data generated using SExtractor software to produce the individual source lists. The catalog includes roughly 80 million detections of 30 million objects involving 112 different detector/filter combinations, and about 160 thousand HST exposures. Source lists from Data Release 8 of th","authors_text":"Bradley C. Whitmore (STScI), Fermi National Accelerator Laboratory), Geoff Wallace (STScI), Lee Quick (STScI), Louis-Gregory Strolger (STScI), Richard L. White (STScI), Ronald A. Downes (STScI), Sahar S. Allam (STScI, S. Michael Fall (STScI), Stefano Casertano (STScI), Stephen H. Lubow (STScI), Tamas Budavari (JHU), Thomas Donaldson (STScI)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-02-15T23:04:01Z","title":"Version 1 of the Hubble Source Catalog"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.04861","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":"sha256:7335aa8eda8c198f0c1d8ff4e061709093bf65d96817ad6b966ff4dc25097f04","target":"record","created_at":"2026-05-18T01:13:55Z","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":"16d696c8f0c34c1a49f5b31e98ad7baa3c7bbc1d0ff202ee2bc4bade8663f402","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-02-15T23:04:01Z","title_canon_sha256":"69a1b8ee75daae5c41161d8defc4132bc38c1e2ed6f543f9da5db47aab8ef114"},"schema_version":"1.0","source":{"id":"1602.04861","kind":"arxiv","version":1}},"canonical_sha256":"ab4c8ec8dea86838d350745bd0f3ebc6f7f8e47f775b98c02297231d8df5d468","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ab4c8ec8dea86838d350745bd0f3ebc6f7f8e47f775b98c02297231d8df5d468","first_computed_at":"2026-05-18T01:13:55.459581Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:13:55.459581Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RW/xUEcNZ835ENR/37trZJZBM29ThkLdqD867qS/n8B0P/cCrx6zrshZyigDSBEe47LBsOOEOVUne690OId7Bg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:13:55.460091Z","signed_message":"canonical_sha256_bytes"},"source_id":"1602.04861","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7335aa8eda8c198f0c1d8ff4e061709093bf65d96817ad6b966ff4dc25097f04","sha256:facb4ffdee8bf5c79f1d1b687eccb2f0628697d3d3009926fbab7e3ac9b021ec"],"state_sha256":"d6ed3b5ab1fc464cdc159b462b2b3b205511c83c010082ad0a7f8c7c53b79c45"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cvx01uD+ZUYMltxBBR91eo0x7999LLAorprBvwn33BL5UgHO+b9iuAPN6XvbjcniEPLw6l+eIXzFuc2VwA5HBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T07:47:13.902929Z","bundle_sha256":"3a74dcd1747614907d96047731611b77d4e808bfb3f09666432434320c470c7a"}}