{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:JE76RGCO65FLPPVGLRSOQV4GFJ","short_pith_number":"pith:JE76RGCO","canonical_record":{"source":{"id":"1602.07841","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-02-25T08:28:36Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"7bef7e770e32bf42a0e1b80bc50947056217e4a2e1bf4a931cda7e87b8002f94","abstract_canon_sha256":"537b795f2e77d8b1d002cc5c807bec9847bf4bd1f3d30ef5adb9e98263ead9df"},"schema_version":"1.0"},"canonical_sha256":"493fe8984ef74ab7bea65c64e857862a419d8d9372fde2d6fab379c35acaec20","source":{"kind":"arxiv","id":"1602.07841","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.07841","created_at":"2026-05-18T01:19:58Z"},{"alias_kind":"arxiv_version","alias_value":"1602.07841v1","created_at":"2026-05-18T01:19:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.07841","created_at":"2026-05-18T01:19:58Z"},{"alias_kind":"pith_short_12","alias_value":"JE76RGCO65FL","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_16","alias_value":"JE76RGCO65FLPPVG","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_8","alias_value":"JE76RGCO","created_at":"2026-05-18T12:30:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:JE76RGCO65FLPPVGLRSOQV4GFJ","target":"record","payload":{"canonical_record":{"source":{"id":"1602.07841","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-02-25T08:28:36Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"7bef7e770e32bf42a0e1b80bc50947056217e4a2e1bf4a931cda7e87b8002f94","abstract_canon_sha256":"537b795f2e77d8b1d002cc5c807bec9847bf4bd1f3d30ef5adb9e98263ead9df"},"schema_version":"1.0"},"canonical_sha256":"493fe8984ef74ab7bea65c64e857862a419d8d9372fde2d6fab379c35acaec20","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:19:58.443144Z","signature_b64":"hZxnb8lX8jK920eh90FhQP0p9xT27/RFKOIgAPj7idgoX+3YyxpPFcC1tuqst/+RaqvSPG3H1xNKtxp2BeJwCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"493fe8984ef74ab7bea65c64e857862a419d8d9372fde2d6fab379c35acaec20","last_reissued_at":"2026-05-18T01:19:58.442593Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:19:58.442593Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1602.07841","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":"2026-05-18T01:19:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wzNrTYOLqz6OebogR7eJw2ZMUdWOYDqmjKKErttR6HLjGJSeFDnO4L1t11QF7+ZoVHb/sGP5uV/tGpSZ1wjPBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T09:09:26.252948Z"},"content_sha256":"fb8798a25c579d474eee9a6e048d5dbe8afd4ef2fb18d1439b94b4078853339f","schema_version":"1.0","event_id":"sha256:fb8798a25c579d474eee9a6e048d5dbe8afd4ef2fb18d1439b94b4078853339f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:JE76RGCO65FLPPVGLRSOQV4GFJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Distance Measurement of NGC 1313 With Cepheids","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Ji-Feng Liu, Peter Yoachim, Qing Gao, Wei Wang","submitted_at":"2016-02-25T08:28:36Z","abstract_excerpt":"We present the detection of Cepheids in the barred spiral galaxy NGC 1313, using the Wide Field and Planetary Camera 2 on the Hubble Space Telescpoe. Twenty B (F450W) and V (F555W) epochs of observations spanning over three weeks were obtained, on which the profile-fitting photometry of all stars in the monitored field was performed using the package HSTphot. A sample of 26 variable stars have been identified to be Cepheids, with periods between 3 and 14 days. Based on the derived period-luminosity relations in B and V bands, we obtain an extinction-corrected distance modulus of mu = 28.32 +- "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.07841","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":"2026-05-18T01:19:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LgHeFrYDBVxOcGsPeY+JG1P0ViMW0sQ15jznSZTPBwgD1cTh6lppa/5nVY7kMYfcPhS7m6ovlI6EEiUwGxUFCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T09:09:26.253406Z"},"content_sha256":"295e4f91bbd4631b36aeb7c2ddb2cc0c3fb046941cba92245133c7e82960dde6","schema_version":"1.0","event_id":"sha256:295e4f91bbd4631b36aeb7c2ddb2cc0c3fb046941cba92245133c7e82960dde6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JE76RGCO65FLPPVGLRSOQV4GFJ/bundle.json","state_url":"https://pith.science/pith/JE76RGCO65FLPPVGLRSOQV4GFJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JE76RGCO65FLPPVGLRSOQV4GFJ/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":"2026-05-26T09:09:26Z","links":{"resolver":"https://pith.science/pith/JE76RGCO65FLPPVGLRSOQV4GFJ","bundle":"https://pith.science/pith/JE76RGCO65FLPPVGLRSOQV4GFJ/bundle.json","state":"https://pith.science/pith/JE76RGCO65FLPPVGLRSOQV4GFJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JE76RGCO65FLPPVGLRSOQV4GFJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:JE76RGCO65FLPPVGLRSOQV4GFJ","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":"537b795f2e77d8b1d002cc5c807bec9847bf4bd1f3d30ef5adb9e98263ead9df","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-02-25T08:28:36Z","title_canon_sha256":"7bef7e770e32bf42a0e1b80bc50947056217e4a2e1bf4a931cda7e87b8002f94"},"schema_version":"1.0","source":{"id":"1602.07841","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.07841","created_at":"2026-05-18T01:19:58Z"},{"alias_kind":"arxiv_version","alias_value":"1602.07841v1","created_at":"2026-05-18T01:19:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.07841","created_at":"2026-05-18T01:19:58Z"},{"alias_kind":"pith_short_12","alias_value":"JE76RGCO65FL","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_16","alias_value":"JE76RGCO65FLPPVG","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_8","alias_value":"JE76RGCO","created_at":"2026-05-18T12:30:25Z"}],"graph_snapshots":[{"event_id":"sha256:295e4f91bbd4631b36aeb7c2ddb2cc0c3fb046941cba92245133c7e82960dde6","target":"graph","created_at":"2026-05-18T01:19:58Z","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 the detection of Cepheids in the barred spiral galaxy NGC 1313, using the Wide Field and Planetary Camera 2 on the Hubble Space Telescpoe. Twenty B (F450W) and V (F555W) epochs of observations spanning over three weeks were obtained, on which the profile-fitting photometry of all stars in the monitored field was performed using the package HSTphot. A sample of 26 variable stars have been identified to be Cepheids, with periods between 3 and 14 days. Based on the derived period-luminosity relations in B and V bands, we obtain an extinction-corrected distance modulus of mu = 28.32 +- ","authors_text":"Ji-Feng Liu, Peter Yoachim, Qing Gao, Wei Wang","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-02-25T08:28:36Z","title":"The Distance Measurement of NGC 1313 With Cepheids"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.07841","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:fb8798a25c579d474eee9a6e048d5dbe8afd4ef2fb18d1439b94b4078853339f","target":"record","created_at":"2026-05-18T01:19:58Z","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":"537b795f2e77d8b1d002cc5c807bec9847bf4bd1f3d30ef5adb9e98263ead9df","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-02-25T08:28:36Z","title_canon_sha256":"7bef7e770e32bf42a0e1b80bc50947056217e4a2e1bf4a931cda7e87b8002f94"},"schema_version":"1.0","source":{"id":"1602.07841","kind":"arxiv","version":1}},"canonical_sha256":"493fe8984ef74ab7bea65c64e857862a419d8d9372fde2d6fab379c35acaec20","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"493fe8984ef74ab7bea65c64e857862a419d8d9372fde2d6fab379c35acaec20","first_computed_at":"2026-05-18T01:19:58.442593Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:19:58.442593Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hZxnb8lX8jK920eh90FhQP0p9xT27/RFKOIgAPj7idgoX+3YyxpPFcC1tuqst/+RaqvSPG3H1xNKtxp2BeJwCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:19:58.443144Z","signed_message":"canonical_sha256_bytes"},"source_id":"1602.07841","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fb8798a25c579d474eee9a6e048d5dbe8afd4ef2fb18d1439b94b4078853339f","sha256:295e4f91bbd4631b36aeb7c2ddb2cc0c3fb046941cba92245133c7e82960dde6"],"state_sha256":"9945bde2a70fba6f2ab3437ce306a8fdb8b15045e41149eebc707275178cea7f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"a9Vpng1HC8bUmz2PqNuGQ2gh4l5mOs+iqjzS07pY0ffKCiDIrQAYz1x9dNaTjMgqfmxIfrVGVPPLbV78rSpcBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T09:09:26.256875Z","bundle_sha256":"9e9a7290e00c72d61f281ae13006ed2bf3953c6a9b792c207377497ae264fae6"}}