{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:USBI6M2J4OSHAK5FWM5EBIHRLV","short_pith_number":"pith:USBI6M2J","canonical_record":{"source":{"id":"0908.0436","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-08-04T13:00:32Z","cross_cats_sorted":[],"title_canon_sha256":"1495053001d773149cd2271c7928f66f438c13ba5ec9bc2fa5102b2fbf8a8d51","abstract_canon_sha256":"610b58ab4fd46e6dde89fb2164f679387a782d52963a733b1c3d9cf5e6b94284"},"schema_version":"1.0"},"canonical_sha256":"a4828f3349e3a4702ba5b33a40a0f15d5a7c0fd509ff6ed9c35c31f42a021a1a","source":{"kind":"arxiv","id":"0908.0436","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0908.0436","created_at":"2026-07-04T15:47:25Z"},{"alias_kind":"arxiv_version","alias_value":"0908.0436v1","created_at":"2026-07-04T15:47:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0908.0436","created_at":"2026-07-04T15:47:25Z"},{"alias_kind":"pith_short_12","alias_value":"USBI6M2J4OSH","created_at":"2026-07-04T15:47:25Z"},{"alias_kind":"pith_short_16","alias_value":"USBI6M2J4OSHAK5F","created_at":"2026-07-04T15:47:25Z"},{"alias_kind":"pith_short_8","alias_value":"USBI6M2J","created_at":"2026-07-04T15:47:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:USBI6M2J4OSHAK5FWM5EBIHRLV","target":"record","payload":{"canonical_record":{"source":{"id":"0908.0436","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-08-04T13:00:32Z","cross_cats_sorted":[],"title_canon_sha256":"1495053001d773149cd2271c7928f66f438c13ba5ec9bc2fa5102b2fbf8a8d51","abstract_canon_sha256":"610b58ab4fd46e6dde89fb2164f679387a782d52963a733b1c3d9cf5e6b94284"},"schema_version":"1.0"},"canonical_sha256":"a4828f3349e3a4702ba5b33a40a0f15d5a7c0fd509ff6ed9c35c31f42a021a1a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:47:25.920074Z","signature_b64":"7J9h+XSx+2+HK/ks9jaSeBw7dINMS7fLXR2FZg8fz+VxjBsdpcbdJ+SxEjm0JLHuOIVlqR3Gg/R7GCWAQX7cDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a4828f3349e3a4702ba5b33a40a0f15d5a7c0fd509ff6ed9c35c31f42a021a1a","last_reissued_at":"2026-07-04T15:47:25.919632Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:47:25.919632Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0908.0436","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":"2026-07-04T15:47:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7qzjz1DckVd2dkQjN8ChOTr2I4Dmh0IJCblqD54o8y94LqPTCaVLREmL/vgnTTt+aEB4QXAN+495WxZ16/lNBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-28T05:33:29.996352Z"},"content_sha256":"3a569fdbfb20a73b6ace36bbe49172e7536a2b1940f494ab89282189a580e6cf","schema_version":"1.0","event_id":"sha256:3a569fdbfb20a73b6ace36bbe49172e7536a2b1940f494ab89282189a580e6cf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:USBI6M2J4OSHAK5FWM5EBIHRLV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Stellar Observations Network Group - the Prototype","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"F. Grundahl, H. Kjeldsen, J. Christensen-Dalsgaard, P. Kj{\\ae}rgaard, S. Frandsen, T. Arentoft, U. G. J{\\o}rgensen","submitted_at":"2009-08-04T13:00:32Z","abstract_excerpt":"The Stellar Observations Network Group (SONG) has obtained full funding for the design, construction and implementation of a prototype telescope and instrumentation package for the first network node. We describe the layout of such a node and its instrumentation and expected performance for radial-velocity measurements. The instrumentation consists of a 1m telescope, equipped with two cameras for photometry of microlensing events with the lucky-imaging technique and a high-resolution spectrograph equipped with an iodine cell for obtaining high-precision radial velocities of solar-like stars, i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0908.0436","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0908.0436/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T15:47:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"y67kV3DAk4cFArpQpFBQveIIAhzMnzeclQ0xVNLOwCC2GbG2uRbblvyUmOp0X7DicoTxEMOS/o83Gf3pB8w4AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-28T05:33:29.996738Z"},"content_sha256":"288822d7e28cac5bfa794a81243d9ab4e5333bbd27f5bd3bffd580905626b418","schema_version":"1.0","event_id":"sha256:288822d7e28cac5bfa794a81243d9ab4e5333bbd27f5bd3bffd580905626b418"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/USBI6M2J4OSHAK5FWM5EBIHRLV/bundle.json","state_url":"https://pith.science/pith/USBI6M2J4OSHAK5FWM5EBIHRLV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/USBI6M2J4OSHAK5FWM5EBIHRLV/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":"2026-07-28T05:33:29Z","links":{"resolver":"https://pith.science/pith/USBI6M2J4OSHAK5FWM5EBIHRLV","bundle":"https://pith.science/pith/USBI6M2J4OSHAK5FWM5EBIHRLV/bundle.json","state":"https://pith.science/pith/USBI6M2J4OSHAK5FWM5EBIHRLV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/USBI6M2J4OSHAK5FWM5EBIHRLV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:USBI6M2J4OSHAK5FWM5EBIHRLV","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":"610b58ab4fd46e6dde89fb2164f679387a782d52963a733b1c3d9cf5e6b94284","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-08-04T13:00:32Z","title_canon_sha256":"1495053001d773149cd2271c7928f66f438c13ba5ec9bc2fa5102b2fbf8a8d51"},"schema_version":"1.0","source":{"id":"0908.0436","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0908.0436","created_at":"2026-07-04T15:47:25Z"},{"alias_kind":"arxiv_version","alias_value":"0908.0436v1","created_at":"2026-07-04T15:47:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0908.0436","created_at":"2026-07-04T15:47:25Z"},{"alias_kind":"pith_short_12","alias_value":"USBI6M2J4OSH","created_at":"2026-07-04T15:47:25Z"},{"alias_kind":"pith_short_16","alias_value":"USBI6M2J4OSHAK5F","created_at":"2026-07-04T15:47:25Z"},{"alias_kind":"pith_short_8","alias_value":"USBI6M2J","created_at":"2026-07-04T15:47:25Z"}],"graph_snapshots":[{"event_id":"sha256:288822d7e28cac5bfa794a81243d9ab4e5333bbd27f5bd3bffd580905626b418","target":"graph","created_at":"2026-07-04T15:47:25Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/0908.0436/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The Stellar Observations Network Group (SONG) has obtained full funding for the design, construction and implementation of a prototype telescope and instrumentation package for the first network node. We describe the layout of such a node and its instrumentation and expected performance for radial-velocity measurements. The instrumentation consists of a 1m telescope, equipped with two cameras for photometry of microlensing events with the lucky-imaging technique and a high-resolution spectrograph equipped with an iodine cell for obtaining high-precision radial velocities of solar-like stars, i","authors_text":"F. Grundahl, H. Kjeldsen, J. Christensen-Dalsgaard, P. Kj{\\ae}rgaard, S. Frandsen, T. Arentoft, U. G. J{\\o}rgensen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-08-04T13:00:32Z","title":"The Stellar Observations Network Group - the Prototype"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0908.0436","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":"sha256:3a569fdbfb20a73b6ace36bbe49172e7536a2b1940f494ab89282189a580e6cf","target":"record","created_at":"2026-07-04T15:47:25Z","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":"610b58ab4fd46e6dde89fb2164f679387a782d52963a733b1c3d9cf5e6b94284","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-08-04T13:00:32Z","title_canon_sha256":"1495053001d773149cd2271c7928f66f438c13ba5ec9bc2fa5102b2fbf8a8d51"},"schema_version":"1.0","source":{"id":"0908.0436","kind":"arxiv","version":1}},"canonical_sha256":"a4828f3349e3a4702ba5b33a40a0f15d5a7c0fd509ff6ed9c35c31f42a021a1a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a4828f3349e3a4702ba5b33a40a0f15d5a7c0fd509ff6ed9c35c31f42a021a1a","first_computed_at":"2026-07-04T15:47:25.919632Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:47:25.919632Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7J9h+XSx+2+HK/ks9jaSeBw7dINMS7fLXR2FZg8fz+VxjBsdpcbdJ+SxEjm0JLHuOIVlqR3Gg/R7GCWAQX7cDA==","signature_status":"signed_v1","signed_at":"2026-07-04T15:47:25.920074Z","signed_message":"canonical_sha256_bytes"},"source_id":"0908.0436","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3a569fdbfb20a73b6ace36bbe49172e7536a2b1940f494ab89282189a580e6cf","sha256:288822d7e28cac5bfa794a81243d9ab4e5333bbd27f5bd3bffd580905626b418"],"state_sha256":"c1f5bb3f8a9ee69fdcc7c726d33558a3852a190b729af637a1d88c4d6ca0260b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1O8VuILD5rrKAE/MtHwnzCDq71udatfOpoyC6DazXmwaBmcz4Xo39RQFk3aJTpxkP5XXWEDQTANWDpyrl8JTDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-28T05:33:29.999329Z","bundle_sha256":"54fd698a72dc9bef9cdd5f4f677858bbd71af806479d213b3e2fdf739583b098"}}