{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:B64JNJUYSC4Y7MTFCZDUIH2UQZ","short_pith_number":"pith:B64JNJUY","canonical_record":{"source":{"id":"1505.03732","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.pop-ph","submitted_at":"2015-05-14T14:21:57Z","cross_cats_sorted":["astro-ph.IM","physics.ed-ph"],"title_canon_sha256":"f2c6039e72476a656c508708f9e4fd0a12a95d392091fe2c44fd723ccf68ebce","abstract_canon_sha256":"6a84258eacdb252841013da51045e54a6b5b9721aba583ccba9c658908953252"},"schema_version":"1.0"},"canonical_sha256":"0fb896a69890b98fb2651647441f548669dfacfa7b4bf8f5f75168c12376fd40","source":{"kind":"arxiv","id":"1505.03732","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.03732","created_at":"2026-05-18T00:05:08Z"},{"alias_kind":"arxiv_version","alias_value":"1505.03732v1","created_at":"2026-05-18T00:05:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.03732","created_at":"2026-05-18T00:05:08Z"},{"alias_kind":"pith_short_12","alias_value":"B64JNJUYSC4Y","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_16","alias_value":"B64JNJUYSC4Y7MTF","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_8","alias_value":"B64JNJUY","created_at":"2026-05-18T12:29:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:B64JNJUYSC4Y7MTFCZDUIH2UQZ","target":"record","payload":{"canonical_record":{"source":{"id":"1505.03732","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.pop-ph","submitted_at":"2015-05-14T14:21:57Z","cross_cats_sorted":["astro-ph.IM","physics.ed-ph"],"title_canon_sha256":"f2c6039e72476a656c508708f9e4fd0a12a95d392091fe2c44fd723ccf68ebce","abstract_canon_sha256":"6a84258eacdb252841013da51045e54a6b5b9721aba583ccba9c658908953252"},"schema_version":"1.0"},"canonical_sha256":"0fb896a69890b98fb2651647441f548669dfacfa7b4bf8f5f75168c12376fd40","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:05:08.164060Z","signature_b64":"+SdrJrXROyFM84erAveveQQGPQp0sAb7MGJo14W2r0l9ib/kgK7EONmF/IY3sW/6khZjwwgbnTE27m3+/48sBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0fb896a69890b98fb2651647441f548669dfacfa7b4bf8f5f75168c12376fd40","last_reissued_at":"2026-05-18T00:05:08.163280Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:05:08.163280Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1505.03732","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":"2026-05-18T00:05:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qTJWKneM2YohT+Sie568itFZYWOeuNjxKnx4a3iqNEyivO9PZf/lIbGFpUrXNk8x2H25vUQipxtJeIb9I5ruCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T15:12:48.531450Z"},"content_sha256":"ae662d390061801d3a5495044d0b30a775e85d1ad285d3e15ede1b162840e16c","schema_version":"1.0","event_id":"sha256:ae662d390061801d3a5495044d0b30a775e85d1ad285d3e15ede1b162840e16c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:B64JNJUYSC4Y7MTFCZDUIH2UQZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"From the Scale Model of the Sky to the Armillary Sphere","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM","physics.ed-ph"],"primary_cat":"physics.pop-ph","authors_text":"Alejandro Gangui, Carlos Paez, Roberto Casazza","submitted_at":"2015-05-14T14:21:57Z","abstract_excerpt":"It is customary to employ a semi-spherical scale model to describe the apparent path of the Sun across the sky, whether it be its diurnal motion or its variation throughout the year. A flat surface and three bent semi-rigid wires (representing the three solar arcs during solstices and equinoxes) will do the job. On the other hand, since very early times, there have been famous armillary spheres built and employed by the most outstanding astronomers for the description of the celestial movements. In those instruments, many of them now considered true works of art, Earth lies in the center of th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.03732","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":"2026-05-18T00:05:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UzONN+8XZTpggFu2IMA906ZtdbatyWHPhRTTlPDJbGofpUE8fdhZ6IWxF/nooMjd8GMX0XNbAF6kHfQuAe/FDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T15:12:48.531802Z"},"content_sha256":"5660f94984b632cecebf28ac7cbf8b998be6abfed30f204dbe57531bc6741b49","schema_version":"1.0","event_id":"sha256:5660f94984b632cecebf28ac7cbf8b998be6abfed30f204dbe57531bc6741b49"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/B64JNJUYSC4Y7MTFCZDUIH2UQZ/bundle.json","state_url":"https://pith.science/pith/B64JNJUYSC4Y7MTFCZDUIH2UQZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/B64JNJUYSC4Y7MTFCZDUIH2UQZ/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":"2026-06-26T15:12:48Z","links":{"resolver":"https://pith.science/pith/B64JNJUYSC4Y7MTFCZDUIH2UQZ","bundle":"https://pith.science/pith/B64JNJUYSC4Y7MTFCZDUIH2UQZ/bundle.json","state":"https://pith.science/pith/B64JNJUYSC4Y7MTFCZDUIH2UQZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/B64JNJUYSC4Y7MTFCZDUIH2UQZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:B64JNJUYSC4Y7MTFCZDUIH2UQZ","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":"6a84258eacdb252841013da51045e54a6b5b9721aba583ccba9c658908953252","cross_cats_sorted":["astro-ph.IM","physics.ed-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.pop-ph","submitted_at":"2015-05-14T14:21:57Z","title_canon_sha256":"f2c6039e72476a656c508708f9e4fd0a12a95d392091fe2c44fd723ccf68ebce"},"schema_version":"1.0","source":{"id":"1505.03732","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.03732","created_at":"2026-05-18T00:05:08Z"},{"alias_kind":"arxiv_version","alias_value":"1505.03732v1","created_at":"2026-05-18T00:05:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.03732","created_at":"2026-05-18T00:05:08Z"},{"alias_kind":"pith_short_12","alias_value":"B64JNJUYSC4Y","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_16","alias_value":"B64JNJUYSC4Y7MTF","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_8","alias_value":"B64JNJUY","created_at":"2026-05-18T12:29:14Z"}],"graph_snapshots":[{"event_id":"sha256:5660f94984b632cecebf28ac7cbf8b998be6abfed30f204dbe57531bc6741b49","target":"graph","created_at":"2026-05-18T00:05:08Z","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":"It is customary to employ a semi-spherical scale model to describe the apparent path of the Sun across the sky, whether it be its diurnal motion or its variation throughout the year. A flat surface and three bent semi-rigid wires (representing the three solar arcs during solstices and equinoxes) will do the job. On the other hand, since very early times, there have been famous armillary spheres built and employed by the most outstanding astronomers for the description of the celestial movements. In those instruments, many of them now considered true works of art, Earth lies in the center of th","authors_text":"Alejandro Gangui, Carlos Paez, Roberto Casazza","cross_cats":["astro-ph.IM","physics.ed-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.pop-ph","submitted_at":"2015-05-14T14:21:57Z","title":"From the Scale Model of the Sky to the Armillary Sphere"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.03732","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:ae662d390061801d3a5495044d0b30a775e85d1ad285d3e15ede1b162840e16c","target":"record","created_at":"2026-05-18T00:05:08Z","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":"6a84258eacdb252841013da51045e54a6b5b9721aba583ccba9c658908953252","cross_cats_sorted":["astro-ph.IM","physics.ed-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.pop-ph","submitted_at":"2015-05-14T14:21:57Z","title_canon_sha256":"f2c6039e72476a656c508708f9e4fd0a12a95d392091fe2c44fd723ccf68ebce"},"schema_version":"1.0","source":{"id":"1505.03732","kind":"arxiv","version":1}},"canonical_sha256":"0fb896a69890b98fb2651647441f548669dfacfa7b4bf8f5f75168c12376fd40","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0fb896a69890b98fb2651647441f548669dfacfa7b4bf8f5f75168c12376fd40","first_computed_at":"2026-05-18T00:05:08.163280Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:05:08.163280Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+SdrJrXROyFM84erAveveQQGPQp0sAb7MGJo14W2r0l9ib/kgK7EONmF/IY3sW/6khZjwwgbnTE27m3+/48sBw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:05:08.164060Z","signed_message":"canonical_sha256_bytes"},"source_id":"1505.03732","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ae662d390061801d3a5495044d0b30a775e85d1ad285d3e15ede1b162840e16c","sha256:5660f94984b632cecebf28ac7cbf8b998be6abfed30f204dbe57531bc6741b49"],"state_sha256":"9e3af042f12cd0fd905336e135825a580462547b8b27736c139270b43836b479"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eMH5DobsQQzyLTMZ2g4DBuX38VRkboq/hScSebQZJsXhaYjh5xjoCM0PXsikhw+L3OBvK5wB0Um3p62sm/ZWBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-26T15:12:48.533841Z","bundle_sha256":"e49d665ed6174aa210c498997a4497cacc703623f748402a5a3840f1e3801747"}}