{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:JIEGDKHXLKZAHQN3XENB7ZJOWS","short_pith_number":"pith:JIEGDKHX","canonical_record":{"source":{"id":"1004.5135","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-04-28T20:20:27Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"63c22d455255d2bb3d451aabf1a1b0f5c91b6d2df9d7b8592630d48a6b214569","abstract_canon_sha256":"e90c8556d04bd7e40f46c49fad395ccf87bd5a11caa801951ef13b8b85eafb21"},"schema_version":"1.0"},"canonical_sha256":"4a0861a8f75ab203c1bbb91a1fe52eb482e79b20c8d40abd26142e561e0ce9a9","source":{"kind":"arxiv","id":"1004.5135","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1004.5135","created_at":"2026-05-18T02:07:45Z"},{"alias_kind":"arxiv_version","alias_value":"1004.5135v1","created_at":"2026-05-18T02:07:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1004.5135","created_at":"2026-05-18T02:07:45Z"},{"alias_kind":"pith_short_12","alias_value":"JIEGDKHXLKZA","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_16","alias_value":"JIEGDKHXLKZAHQN3","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_8","alias_value":"JIEGDKHX","created_at":"2026-05-18T12:26:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:JIEGDKHXLKZAHQN3XENB7ZJOWS","target":"record","payload":{"canonical_record":{"source":{"id":"1004.5135","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-04-28T20:20:27Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"63c22d455255d2bb3d451aabf1a1b0f5c91b6d2df9d7b8592630d48a6b214569","abstract_canon_sha256":"e90c8556d04bd7e40f46c49fad395ccf87bd5a11caa801951ef13b8b85eafb21"},"schema_version":"1.0"},"canonical_sha256":"4a0861a8f75ab203c1bbb91a1fe52eb482e79b20c8d40abd26142e561e0ce9a9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:07:45.397015Z","signature_b64":"603w4VSqxr0Fu1YkxCusDCG5Sjv69xfZ+EvSGAai8OLOQ+AWtDm8zPe4RoBiW+Wpj1RvYTRZvN2mhtw+4hKfAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4a0861a8f75ab203c1bbb91a1fe52eb482e79b20c8d40abd26142e561e0ce9a9","last_reissued_at":"2026-05-18T02:07:45.396379Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:07:45.396379Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1004.5135","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":"2026-05-18T02:07:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QCXGebVPAVlSyP8jUgociyRPEhi6TWZMBIELydPAG8WyQSyAKCbB0Lb+/hO7y3j0sf8JmEljcgrTHL+vlEFgAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T00:38:06.495446Z"},"content_sha256":"0616fd519f35cdf6cb0f8c85dd788f2f54be76082c562d714651cb2c30f7e472","schema_version":"1.0","event_id":"sha256:0616fd519f35cdf6cb0f8c85dd788f2f54be76082c562d714651cb2c30f7e472"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:JIEGDKHXLKZAHQN3XENB7ZJOWS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The ACS Nearby Galaxy Survey Treasury VI. The Ancient Star Forming disk of NGC 404","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"Adrienne Stilp, Andrew Dolphin, Anil C. Seth, Benjamin F. Williams, Daniel Weisz, Evan Skillman, Julianne J. Dalcanton, Karoline M. Gilbert","submitted_at":"2010-04-28T20:20:27Z","abstract_excerpt":"We present HST/WFPC2 observations across the disk of the nearby isolated dwarf S0 galaxy NGC 404, which hosts an extended gas disk.  Our deepest field reaches the red clump and main-sequence stars with ages <500 Myr. Although we detect trace amounts of star formation at times more recent than 10 Gyr for all fields, the proportion of red giant stars to asymptotic giants and main sequence stars suggests that the disk is dominated by an ancient (>10 Gyr) population. Detailed modeling of the color-magnitude diagram suggests that ~70% of the stellar mass in the NGC 404 disk formed by z~2 (10 Gyr ag"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1004.5135","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":"2026-05-18T02:07:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"js7d1vOwRGhQs3D42IOLcZgrBPHX/WGhzzKdHA+HBLkDA/Ddhe1LCl9mrDvPjMe93wewj/HtI/wFJKaAI8iBBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T00:38:06.495814Z"},"content_sha256":"93c977193010477bec0e4f441486ae0bd764030b7f1f63b7cc10b64070590223","schema_version":"1.0","event_id":"sha256:93c977193010477bec0e4f441486ae0bd764030b7f1f63b7cc10b64070590223"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JIEGDKHXLKZAHQN3XENB7ZJOWS/bundle.json","state_url":"https://pith.science/pith/JIEGDKHXLKZAHQN3XENB7ZJOWS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JIEGDKHXLKZAHQN3XENB7ZJOWS/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":"2026-06-04T00:38:06Z","links":{"resolver":"https://pith.science/pith/JIEGDKHXLKZAHQN3XENB7ZJOWS","bundle":"https://pith.science/pith/JIEGDKHXLKZAHQN3XENB7ZJOWS/bundle.json","state":"https://pith.science/pith/JIEGDKHXLKZAHQN3XENB7ZJOWS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JIEGDKHXLKZAHQN3XENB7ZJOWS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:JIEGDKHXLKZAHQN3XENB7ZJOWS","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":"e90c8556d04bd7e40f46c49fad395ccf87bd5a11caa801951ef13b8b85eafb21","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-04-28T20:20:27Z","title_canon_sha256":"63c22d455255d2bb3d451aabf1a1b0f5c91b6d2df9d7b8592630d48a6b214569"},"schema_version":"1.0","source":{"id":"1004.5135","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1004.5135","created_at":"2026-05-18T02:07:45Z"},{"alias_kind":"arxiv_version","alias_value":"1004.5135v1","created_at":"2026-05-18T02:07:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1004.5135","created_at":"2026-05-18T02:07:45Z"},{"alias_kind":"pith_short_12","alias_value":"JIEGDKHXLKZA","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_16","alias_value":"JIEGDKHXLKZAHQN3","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_8","alias_value":"JIEGDKHX","created_at":"2026-05-18T12:26:09Z"}],"graph_snapshots":[{"event_id":"sha256:93c977193010477bec0e4f441486ae0bd764030b7f1f63b7cc10b64070590223","target":"graph","created_at":"2026-05-18T02:07:45Z","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/WFPC2 observations across the disk of the nearby isolated dwarf S0 galaxy NGC 404, which hosts an extended gas disk.  Our deepest field reaches the red clump and main-sequence stars with ages <500 Myr. Although we detect trace amounts of star formation at times more recent than 10 Gyr for all fields, the proportion of red giant stars to asymptotic giants and main sequence stars suggests that the disk is dominated by an ancient (>10 Gyr) population. Detailed modeling of the color-magnitude diagram suggests that ~70% of the stellar mass in the NGC 404 disk formed by z~2 (10 Gyr ag","authors_text":"Adrienne Stilp, Andrew Dolphin, Anil C. Seth, Benjamin F. Williams, Daniel Weisz, Evan Skillman, Julianne J. Dalcanton, Karoline M. Gilbert","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-04-28T20:20:27Z","title":"The ACS Nearby Galaxy Survey Treasury VI. The Ancient Star Forming disk of NGC 404"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1004.5135","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":"sha256:0616fd519f35cdf6cb0f8c85dd788f2f54be76082c562d714651cb2c30f7e472","target":"record","created_at":"2026-05-18T02:07:45Z","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":"e90c8556d04bd7e40f46c49fad395ccf87bd5a11caa801951ef13b8b85eafb21","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-04-28T20:20:27Z","title_canon_sha256":"63c22d455255d2bb3d451aabf1a1b0f5c91b6d2df9d7b8592630d48a6b214569"},"schema_version":"1.0","source":{"id":"1004.5135","kind":"arxiv","version":1}},"canonical_sha256":"4a0861a8f75ab203c1bbb91a1fe52eb482e79b20c8d40abd26142e561e0ce9a9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4a0861a8f75ab203c1bbb91a1fe52eb482e79b20c8d40abd26142e561e0ce9a9","first_computed_at":"2026-05-18T02:07:45.396379Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:07:45.396379Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"603w4VSqxr0Fu1YkxCusDCG5Sjv69xfZ+EvSGAai8OLOQ+AWtDm8zPe4RoBiW+Wpj1RvYTRZvN2mhtw+4hKfAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:07:45.397015Z","signed_message":"canonical_sha256_bytes"},"source_id":"1004.5135","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0616fd519f35cdf6cb0f8c85dd788f2f54be76082c562d714651cb2c30f7e472","sha256:93c977193010477bec0e4f441486ae0bd764030b7f1f63b7cc10b64070590223"],"state_sha256":"9d5bc8bc08fa31ebaa16120ab0fff89173076d3305cad06aba7f059761cbda74"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4j7shZWnG07nmQqr+wRaF4pGCMhpQCeK6hRhenjsqqMiR9wI5dGzfFWL+hQPms+nuIfOfpygpaeZu8T/TXCEDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T00:38:06.498033Z","bundle_sha256":"2d6c32ab537b5bb8b7dbeecd63e5c7d5fa852a846e45e8bfae9828ba1abd6bdc"}}