{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:JOSJKZDWRA4EIVQYUG34UZCQBH","short_pith_number":"pith:JOSJKZDW","canonical_record":{"source":{"id":"1208.4982","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2012-08-24T14:03:40Z","cross_cats_sorted":[],"title_canon_sha256":"f37a04d6491ccc19f5028baa4a49ec165ed99b92556f61be23a3ad4373cf4df6","abstract_canon_sha256":"9d045603e3c08a4565b88574b6e02fe97dfe180110bb435427683779df020fb9"},"schema_version":"1.0"},"canonical_sha256":"4ba49564768838445618a1b7ca645009cb8da81762cfbb7d76929a82a94e1598","source":{"kind":"arxiv","id":"1208.4982","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1208.4982","created_at":"2026-05-18T01:54:58Z"},{"alias_kind":"arxiv_version","alias_value":"1208.4982v1","created_at":"2026-05-18T01:54:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1208.4982","created_at":"2026-05-18T01:54:58Z"},{"alias_kind":"pith_short_12","alias_value":"JOSJKZDWRA4E","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_16","alias_value":"JOSJKZDWRA4EIVQY","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_8","alias_value":"JOSJKZDW","created_at":"2026-05-18T12:27:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:JOSJKZDWRA4EIVQYUG34UZCQBH","target":"record","payload":{"canonical_record":{"source":{"id":"1208.4982","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2012-08-24T14:03:40Z","cross_cats_sorted":[],"title_canon_sha256":"f37a04d6491ccc19f5028baa4a49ec165ed99b92556f61be23a3ad4373cf4df6","abstract_canon_sha256":"9d045603e3c08a4565b88574b6e02fe97dfe180110bb435427683779df020fb9"},"schema_version":"1.0"},"canonical_sha256":"4ba49564768838445618a1b7ca645009cb8da81762cfbb7d76929a82a94e1598","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:54:58.605892Z","signature_b64":"G59gXwTjNrJX4PRlJutMbTiRGy5o2Dg7uZXKdWdwQnnwParSLnyUINxUvDkuzZ85oVH1cVWzGtGRQWe7k9ddBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4ba49564768838445618a1b7ca645009cb8da81762cfbb7d76929a82a94e1598","last_reissued_at":"2026-05-18T01:54:58.605154Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:54:58.605154Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1208.4982","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":"2026-05-18T01:54:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"f9u2zeR9p5Ly4mRvPIGNOEYw0IhQVX4u1mCmjbbgA8My7t6zlXvhiB5QgRX3UejfWYR9uuAfV9es+1HYVYsoDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-18T22:18:28.955701Z"},"content_sha256":"ea03a1b432b63fad6f53490092f770ce8a7963d3e998cc485a6795c40acb3f0e","schema_version":"1.0","event_id":"sha256:ea03a1b432b63fad6f53490092f770ce8a7963d3e998cc485a6795c40acb3f0e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:JOSJKZDWRA4EIVQYUG34UZCQBH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"GTC OSIRIS transiting exoplanet atmospheric survey: detection of sodium in XO-2b from differential long-slit spectroscopy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"A. Lecavelier des Etangs, A. Vidal-Madjar, C. M. Huitson, D. Ehrenreich, D. K. Sing, F. Pont, G. E. Ballester, J. J. Fortney, J.-M. D\\'esert, M. Lopez-Morales, P. A. Wilson","submitted_at":"2012-08-24T14:03:40Z","abstract_excerpt":"We present two transits of the hot-Jupiter exoplanet XO-2b using the Gran Telescopio Canarias (GTC). The time series observations were performed using long-slit spectroscopy of XO-2 and a nearby reference star with the OSIRIS instrument, enabling differential specrophotometric transit lightcurves capable of measuring the exoplanet's transmission spectrum. Two optical low-resolution grisms were used to cover the optical wavelength range from 3800 to 9300{\\AA}. We find that sub-mmag level slit losses between the target and reference star prevent full optical transmission spectra from being const"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.4982","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":"2026-05-18T01:54:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CN/McgoGJKRr9fcTQR3V5zw841+iA4U01QS3cjHu0Ozq2C1peDQ/MY5X1/CHP+LRYfXcdNT+B8XTnJUUx2N8Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-18T22:18:28.956438Z"},"content_sha256":"bb40b0df0d22b8765d20a7cf8ac2965217115bbae1cb5d65306e9dfc12e63d76","schema_version":"1.0","event_id":"sha256:bb40b0df0d22b8765d20a7cf8ac2965217115bbae1cb5d65306e9dfc12e63d76"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JOSJKZDWRA4EIVQYUG34UZCQBH/bundle.json","state_url":"https://pith.science/pith/JOSJKZDWRA4EIVQYUG34UZCQBH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JOSJKZDWRA4EIVQYUG34UZCQBH/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":"2026-05-18T22:18:28Z","links":{"resolver":"https://pith.science/pith/JOSJKZDWRA4EIVQYUG34UZCQBH","bundle":"https://pith.science/pith/JOSJKZDWRA4EIVQYUG34UZCQBH/bundle.json","state":"https://pith.science/pith/JOSJKZDWRA4EIVQYUG34UZCQBH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JOSJKZDWRA4EIVQYUG34UZCQBH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:JOSJKZDWRA4EIVQYUG34UZCQBH","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":"9d045603e3c08a4565b88574b6e02fe97dfe180110bb435427683779df020fb9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2012-08-24T14:03:40Z","title_canon_sha256":"f37a04d6491ccc19f5028baa4a49ec165ed99b92556f61be23a3ad4373cf4df6"},"schema_version":"1.0","source":{"id":"1208.4982","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1208.4982","created_at":"2026-05-18T01:54:58Z"},{"alias_kind":"arxiv_version","alias_value":"1208.4982v1","created_at":"2026-05-18T01:54:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1208.4982","created_at":"2026-05-18T01:54:58Z"},{"alias_kind":"pith_short_12","alias_value":"JOSJKZDWRA4E","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_16","alias_value":"JOSJKZDWRA4EIVQY","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_8","alias_value":"JOSJKZDW","created_at":"2026-05-18T12:27:11Z"}],"graph_snapshots":[{"event_id":"sha256:bb40b0df0d22b8765d20a7cf8ac2965217115bbae1cb5d65306e9dfc12e63d76","target":"graph","created_at":"2026-05-18T01:54:58Z","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 two transits of the hot-Jupiter exoplanet XO-2b using the Gran Telescopio Canarias (GTC). The time series observations were performed using long-slit spectroscopy of XO-2 and a nearby reference star with the OSIRIS instrument, enabling differential specrophotometric transit lightcurves capable of measuring the exoplanet's transmission spectrum. Two optical low-resolution grisms were used to cover the optical wavelength range from 3800 to 9300{\\AA}. We find that sub-mmag level slit losses between the target and reference star prevent full optical transmission spectra from being const","authors_text":"A. Lecavelier des Etangs, A. Vidal-Madjar, C. M. Huitson, D. Ehrenreich, D. K. Sing, F. Pont, G. E. Ballester, J. J. Fortney, J.-M. D\\'esert, M. Lopez-Morales, P. A. Wilson","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2012-08-24T14:03:40Z","title":"GTC OSIRIS transiting exoplanet atmospheric survey: detection of sodium in XO-2b from differential long-slit spectroscopy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.4982","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:ea03a1b432b63fad6f53490092f770ce8a7963d3e998cc485a6795c40acb3f0e","target":"record","created_at":"2026-05-18T01:54:58Z","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":"9d045603e3c08a4565b88574b6e02fe97dfe180110bb435427683779df020fb9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2012-08-24T14:03:40Z","title_canon_sha256":"f37a04d6491ccc19f5028baa4a49ec165ed99b92556f61be23a3ad4373cf4df6"},"schema_version":"1.0","source":{"id":"1208.4982","kind":"arxiv","version":1}},"canonical_sha256":"4ba49564768838445618a1b7ca645009cb8da81762cfbb7d76929a82a94e1598","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4ba49564768838445618a1b7ca645009cb8da81762cfbb7d76929a82a94e1598","first_computed_at":"2026-05-18T01:54:58.605154Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:54:58.605154Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"G59gXwTjNrJX4PRlJutMbTiRGy5o2Dg7uZXKdWdwQnnwParSLnyUINxUvDkuzZ85oVH1cVWzGtGRQWe7k9ddBw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:54:58.605892Z","signed_message":"canonical_sha256_bytes"},"source_id":"1208.4982","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ea03a1b432b63fad6f53490092f770ce8a7963d3e998cc485a6795c40acb3f0e","sha256:bb40b0df0d22b8765d20a7cf8ac2965217115bbae1cb5d65306e9dfc12e63d76"],"state_sha256":"acf37d592a0d53444196602ecee2a65e2e62798d5564eadd7c20657038139fa7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ezbWj9Z/NGsBZSFmeOxqa+8/NExsOgmTXaPYCsfEie4gUm/zqw526/YMlUz4qUyC1ofgIplU1yTY8KFFWOXnDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-18T22:18:28.958566Z","bundle_sha256":"aca7c4f7afd1275bdea69e0d5e5a6d05490882a368cdf09ecee2ec052b81e0ab"}}