{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:UBBRQ6F3UU37TS3GDIVK5PDRNV","short_pith_number":"pith:UBBRQ6F3","canonical_record":{"source":{"id":"1206.6901","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-06-28T20:56:19Z","cross_cats_sorted":[],"title_canon_sha256":"6d870666915ea30e15d48dbcabbe1593be0db921f38f002a4d7a896726f5f49c","abstract_canon_sha256":"4f45897bea6e5b45ed345c372e973e6df7685a1bb22e3fa7cfb92524e9e882b9"},"schema_version":"1.0"},"canonical_sha256":"a0431878bba537f9cb661a2aaebc716d61cc2255b1f91ca1791f3713348c3275","source":{"kind":"arxiv","id":"1206.6901","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1206.6901","created_at":"2026-05-18T01:56:36Z"},{"alias_kind":"arxiv_version","alias_value":"1206.6901v1","created_at":"2026-05-18T01:56:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1206.6901","created_at":"2026-05-18T01:56:36Z"},{"alias_kind":"pith_short_12","alias_value":"UBBRQ6F3UU37","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_16","alias_value":"UBBRQ6F3UU37TS3G","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_8","alias_value":"UBBRQ6F3","created_at":"2026-05-18T12:27:23Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:UBBRQ6F3UU37TS3GDIVK5PDRNV","target":"record","payload":{"canonical_record":{"source":{"id":"1206.6901","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-06-28T20:56:19Z","cross_cats_sorted":[],"title_canon_sha256":"6d870666915ea30e15d48dbcabbe1593be0db921f38f002a4d7a896726f5f49c","abstract_canon_sha256":"4f45897bea6e5b45ed345c372e973e6df7685a1bb22e3fa7cfb92524e9e882b9"},"schema_version":"1.0"},"canonical_sha256":"a0431878bba537f9cb661a2aaebc716d61cc2255b1f91ca1791f3713348c3275","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:56:36.651509Z","signature_b64":"HnVLhcA5ntxBxuPoXxQ6Ueq9lQuG9ZhuWMOb/xjoNgRNw8x/myfOSmcVgfIsQm7YDrVj2407Ez4Wc4pDazR2DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a0431878bba537f9cb661a2aaebc716d61cc2255b1f91ca1791f3713348c3275","last_reissued_at":"2026-05-18T01:56:36.651067Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:56:36.651067Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1206.6901","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":"2026-05-18T01:56:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"T9ud7RMEHViTSNPUve5zJtO5bHolhMrjbdYZoFmuM7dgpMzE+DhPAWr6z7Pw5WbJ9XcDWuQUvVq46xA3rF8jAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T21:46:21.495474Z"},"content_sha256":"cebd5140bb32d87c330a2b5badbb2065976c4732bb43a09ac4401ade34f25545","schema_version":"1.0","event_id":"sha256:cebd5140bb32d87c330a2b5badbb2065976c4732bb43a09ac4401ade34f25545"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:UBBRQ6F3UU37TS3GDIVK5PDRNV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Characterizing Near-Infrared Sky Brightness in the Canadian High Arctic","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Anthony Tekatch, Doug L. Welch, Eric Steinbring, James R. Graham, Nicholas M. Law, Roberto Abraham, Suresh Sivanandam, Wayne Ngan","submitted_at":"2012-06-28T20:56:19Z","abstract_excerpt":"We present the first measurements of the near-infrared (NIR), specifically the J-band, sky background in the Canadian High Arctic. There has been considerable recent interest in the development of an astronomical observatory in Ellesmere Island; initial site testing has shown promise for a world-class site. Encouragement for our study came from sky background measurements on the high Antarctic glacial plateau in winter that showed markedly lower NIR emission when compared to good mid-latitude astronomical sites due to reduced emission from OH airglow lines. This is possibly a Polar effect and "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.6901","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":"2026-05-18T01:56:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VV+lwd2RXVhPnberlh6qsKKX732v1xsMFSJO6XVUGRKuUk3mpg7PPVBMjU+3jNSNbL5T91zMzwXM+1aYaZ7aAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T21:46:21.496186Z"},"content_sha256":"f5039cad80ea27fdda19bc0bf1e99084867352fc8942be516a44aa1a9b2375ab","schema_version":"1.0","event_id":"sha256:f5039cad80ea27fdda19bc0bf1e99084867352fc8942be516a44aa1a9b2375ab"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UBBRQ6F3UU37TS3GDIVK5PDRNV/bundle.json","state_url":"https://pith.science/pith/UBBRQ6F3UU37TS3GDIVK5PDRNV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UBBRQ6F3UU37TS3GDIVK5PDRNV/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":"2026-05-28T21:46:21Z","links":{"resolver":"https://pith.science/pith/UBBRQ6F3UU37TS3GDIVK5PDRNV","bundle":"https://pith.science/pith/UBBRQ6F3UU37TS3GDIVK5PDRNV/bundle.json","state":"https://pith.science/pith/UBBRQ6F3UU37TS3GDIVK5PDRNV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UBBRQ6F3UU37TS3GDIVK5PDRNV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:UBBRQ6F3UU37TS3GDIVK5PDRNV","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":"4f45897bea6e5b45ed345c372e973e6df7685a1bb22e3fa7cfb92524e9e882b9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-06-28T20:56:19Z","title_canon_sha256":"6d870666915ea30e15d48dbcabbe1593be0db921f38f002a4d7a896726f5f49c"},"schema_version":"1.0","source":{"id":"1206.6901","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1206.6901","created_at":"2026-05-18T01:56:36Z"},{"alias_kind":"arxiv_version","alias_value":"1206.6901v1","created_at":"2026-05-18T01:56:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1206.6901","created_at":"2026-05-18T01:56:36Z"},{"alias_kind":"pith_short_12","alias_value":"UBBRQ6F3UU37","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_16","alias_value":"UBBRQ6F3UU37TS3G","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_8","alias_value":"UBBRQ6F3","created_at":"2026-05-18T12:27:23Z"}],"graph_snapshots":[{"event_id":"sha256:f5039cad80ea27fdda19bc0bf1e99084867352fc8942be516a44aa1a9b2375ab","target":"graph","created_at":"2026-05-18T01:56:36Z","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 first measurements of the near-infrared (NIR), specifically the J-band, sky background in the Canadian High Arctic. There has been considerable recent interest in the development of an astronomical observatory in Ellesmere Island; initial site testing has shown promise for a world-class site. Encouragement for our study came from sky background measurements on the high Antarctic glacial plateau in winter that showed markedly lower NIR emission when compared to good mid-latitude astronomical sites due to reduced emission from OH airglow lines. This is possibly a Polar effect and ","authors_text":"Anthony Tekatch, Doug L. Welch, Eric Steinbring, James R. Graham, Nicholas M. Law, Roberto Abraham, Suresh Sivanandam, Wayne Ngan","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-06-28T20:56:19Z","title":"Characterizing Near-Infrared Sky Brightness in the Canadian High Arctic"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.6901","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:cebd5140bb32d87c330a2b5badbb2065976c4732bb43a09ac4401ade34f25545","target":"record","created_at":"2026-05-18T01:56:36Z","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":"4f45897bea6e5b45ed345c372e973e6df7685a1bb22e3fa7cfb92524e9e882b9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-06-28T20:56:19Z","title_canon_sha256":"6d870666915ea30e15d48dbcabbe1593be0db921f38f002a4d7a896726f5f49c"},"schema_version":"1.0","source":{"id":"1206.6901","kind":"arxiv","version":1}},"canonical_sha256":"a0431878bba537f9cb661a2aaebc716d61cc2255b1f91ca1791f3713348c3275","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a0431878bba537f9cb661a2aaebc716d61cc2255b1f91ca1791f3713348c3275","first_computed_at":"2026-05-18T01:56:36.651067Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:56:36.651067Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HnVLhcA5ntxBxuPoXxQ6Ueq9lQuG9ZhuWMOb/xjoNgRNw8x/myfOSmcVgfIsQm7YDrVj2407Ez4Wc4pDazR2DA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:56:36.651509Z","signed_message":"canonical_sha256_bytes"},"source_id":"1206.6901","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cebd5140bb32d87c330a2b5badbb2065976c4732bb43a09ac4401ade34f25545","sha256:f5039cad80ea27fdda19bc0bf1e99084867352fc8942be516a44aa1a9b2375ab"],"state_sha256":"b11250989eb3e46313e75adc8553673a572a638dd5fa0d0bff9ae283f2b5864a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UyIaUUi/yBz0f3JbRFgD43644HZIlT3bDiN2BL0QrH9DiJAj14gcfgyWmkhFwdqlK3nl86jnWX0KMnsGmo3hBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T21:46:21.499761Z","bundle_sha256":"18451e7b878d5aac9f1483ee94459331757ee8453428fd71653f5a2e1522b9d1"}}