{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:DE6QGTHFVJC76JRA5ZYAJC55AR","short_pith_number":"pith:DE6QGTHF","canonical_record":{"source":{"id":"1301.3955","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-01-17T00:42:29Z","cross_cats_sorted":[],"title_canon_sha256":"10fab105f401576048333110dd0f9952723d7806cfe71e225cfc94755807a44d","abstract_canon_sha256":"0b935dd9f8bb65e4a4d075abb792012cad6a97e908d55f01ed6d82a49ce3e569"},"schema_version":"1.0"},"canonical_sha256":"193d034ce5aa45ff2620ee70048bbd047124748028e36bf5250e8192ff697605","source":{"kind":"arxiv","id":"1301.3955","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1301.3955","created_at":"2026-05-18T01:52:06Z"},{"alias_kind":"arxiv_version","alias_value":"1301.3955v1","created_at":"2026-05-18T01:52:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1301.3955","created_at":"2026-05-18T01:52:06Z"},{"alias_kind":"pith_short_12","alias_value":"DE6QGTHFVJC7","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_16","alias_value":"DE6QGTHFVJC76JRA","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_8","alias_value":"DE6QGTHF","created_at":"2026-05-18T12:27:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:DE6QGTHFVJC76JRA5ZYAJC55AR","target":"record","payload":{"canonical_record":{"source":{"id":"1301.3955","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-01-17T00:42:29Z","cross_cats_sorted":[],"title_canon_sha256":"10fab105f401576048333110dd0f9952723d7806cfe71e225cfc94755807a44d","abstract_canon_sha256":"0b935dd9f8bb65e4a4d075abb792012cad6a97e908d55f01ed6d82a49ce3e569"},"schema_version":"1.0"},"canonical_sha256":"193d034ce5aa45ff2620ee70048bbd047124748028e36bf5250e8192ff697605","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:52:06.402258Z","signature_b64":"EeXSjXfUwOsn/8Nw+4CfRqe8mpCmDZj4uEM4L3g7gf+R3UBUmZ1+COvXz6hRnjB0BME9QfMZJa33EN0V0v4ACQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"193d034ce5aa45ff2620ee70048bbd047124748028e36bf5250e8192ff697605","last_reissued_at":"2026-05-18T01:52:06.401847Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:52:06.401847Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1301.3955","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":"2026-05-18T01:52:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aGRn+P2OSC2Dnl/mmrEkh29a5Z93W5YYjl9Dx3QtuaomaFwSOD7LrH4aO8HgJDwOYUoh6pfZy2I9Efr3zA6yAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T06:48:39.429366Z"},"content_sha256":"a33f0557d3382842d3a863e0d9dbbc2a92796e2afe816db883edb5fc8cee93a2","schema_version":"1.0","event_id":"sha256:a33f0557d3382842d3a863e0d9dbbc2a92796e2afe816db883edb5fc8cee93a2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:DE6QGTHFVJC76JRA5ZYAJC55AR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Observations of the WASP-2 System by the APOSTLE Program","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Amy E. Rose, Andrew C. Becker, Benjamin F. Williams, Eric Agol, Praveen Kundurthy, Rory Barnes","submitted_at":"2013-01-17T00:42:29Z","abstract_excerpt":"We present transit observations of the WASP-2 exoplanet system by the Apache Point Survey of Transit Lightcurves of Exoplanets (APOSTLE) program. Model fitting to these data allows us to improve measurements of the hot-Jupiter exoplanet WASP-2b and its orbital parameters by a factor of ~2 over prior studies; we do not find evidence for transit depth variations. We do find reduced chi^2 values greater than 1.0 in the observed minus computed transit times. A sinusoidal fit to the residuals yields a timing semi-amplitude of 32 seconds and a period of 389 days. However, random rearrangements of th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1301.3955","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":"2026-05-18T01:52:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"s+GY1KGv48iI3YqbsOVKiWRZ7DyIHnadecPaQqtGgs7A9qZrOI8MEJAUHyWb6CmjiYAFqWY5uoMV8Qx8UfQmDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T06:48:39.429723Z"},"content_sha256":"675dcb567faf13796b3a5bad7af5e757779c11f573c542b0dd9ca26ae15134a1","schema_version":"1.0","event_id":"sha256:675dcb567faf13796b3a5bad7af5e757779c11f573c542b0dd9ca26ae15134a1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DE6QGTHFVJC76JRA5ZYAJC55AR/bundle.json","state_url":"https://pith.science/pith/DE6QGTHFVJC76JRA5ZYAJC55AR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DE6QGTHFVJC76JRA5ZYAJC55AR/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":"2026-06-02T06:48:39Z","links":{"resolver":"https://pith.science/pith/DE6QGTHFVJC76JRA5ZYAJC55AR","bundle":"https://pith.science/pith/DE6QGTHFVJC76JRA5ZYAJC55AR/bundle.json","state":"https://pith.science/pith/DE6QGTHFVJC76JRA5ZYAJC55AR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DE6QGTHFVJC76JRA5ZYAJC55AR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:DE6QGTHFVJC76JRA5ZYAJC55AR","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":"0b935dd9f8bb65e4a4d075abb792012cad6a97e908d55f01ed6d82a49ce3e569","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-01-17T00:42:29Z","title_canon_sha256":"10fab105f401576048333110dd0f9952723d7806cfe71e225cfc94755807a44d"},"schema_version":"1.0","source":{"id":"1301.3955","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1301.3955","created_at":"2026-05-18T01:52:06Z"},{"alias_kind":"arxiv_version","alias_value":"1301.3955v1","created_at":"2026-05-18T01:52:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1301.3955","created_at":"2026-05-18T01:52:06Z"},{"alias_kind":"pith_short_12","alias_value":"DE6QGTHFVJC7","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_16","alias_value":"DE6QGTHFVJC76JRA","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_8","alias_value":"DE6QGTHF","created_at":"2026-05-18T12:27:43Z"}],"graph_snapshots":[{"event_id":"sha256:675dcb567faf13796b3a5bad7af5e757779c11f573c542b0dd9ca26ae15134a1","target":"graph","created_at":"2026-05-18T01:52:06Z","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 transit observations of the WASP-2 exoplanet system by the Apache Point Survey of Transit Lightcurves of Exoplanets (APOSTLE) program. Model fitting to these data allows us to improve measurements of the hot-Jupiter exoplanet WASP-2b and its orbital parameters by a factor of ~2 over prior studies; we do not find evidence for transit depth variations. We do find reduced chi^2 values greater than 1.0 in the observed minus computed transit times. A sinusoidal fit to the residuals yields a timing semi-amplitude of 32 seconds and a period of 389 days. However, random rearrangements of th","authors_text":"Amy E. Rose, Andrew C. Becker, Benjamin F. Williams, Eric Agol, Praveen Kundurthy, Rory Barnes","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-01-17T00:42:29Z","title":"Observations of the WASP-2 System by the APOSTLE Program"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1301.3955","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:a33f0557d3382842d3a863e0d9dbbc2a92796e2afe816db883edb5fc8cee93a2","target":"record","created_at":"2026-05-18T01:52:06Z","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":"0b935dd9f8bb65e4a4d075abb792012cad6a97e908d55f01ed6d82a49ce3e569","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-01-17T00:42:29Z","title_canon_sha256":"10fab105f401576048333110dd0f9952723d7806cfe71e225cfc94755807a44d"},"schema_version":"1.0","source":{"id":"1301.3955","kind":"arxiv","version":1}},"canonical_sha256":"193d034ce5aa45ff2620ee70048bbd047124748028e36bf5250e8192ff697605","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"193d034ce5aa45ff2620ee70048bbd047124748028e36bf5250e8192ff697605","first_computed_at":"2026-05-18T01:52:06.401847Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:52:06.401847Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"EeXSjXfUwOsn/8Nw+4CfRqe8mpCmDZj4uEM4L3g7gf+R3UBUmZ1+COvXz6hRnjB0BME9QfMZJa33EN0V0v4ACQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:52:06.402258Z","signed_message":"canonical_sha256_bytes"},"source_id":"1301.3955","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a33f0557d3382842d3a863e0d9dbbc2a92796e2afe816db883edb5fc8cee93a2","sha256:675dcb567faf13796b3a5bad7af5e757779c11f573c542b0dd9ca26ae15134a1"],"state_sha256":"57d02103ee086b3d721967e3ba5196aa5d7fb268a6ada7bc4873d8bfb436dc99"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"n3u/8BVtpSfXLYnXllKPEYVzVAyEh5Tv+J0O69lsXiYbD0AJMhNn2y3eCJwD4N7CTYZDPgxi2k9+Nb8WEs6kDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T06:48:39.431675Z","bundle_sha256":"7e9638b28daf9ac33dc80f247738186841116e7bbd4d6a68ebd4510f5c3a2529"}}