{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:EWFFZ3PWS335CHXUQKY42J4U7K","short_pith_number":"pith:EWFFZ3PW","canonical_record":{"source":{"id":"1608.07515","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-08-26T16:40:20Z","cross_cats_sorted":[],"title_canon_sha256":"afdb495b8f3953bb0b5fde633f67a1de6405b993b0ca57ab435a68337aee6c53","abstract_canon_sha256":"24f1ba449a002205c41636d0c96cffc23d1a9c10917d610faa9ac5d5bc674a2e"},"schema_version":"1.0"},"canonical_sha256":"258a5cedf696f7d11ef482b1cd2794fab5dd930bf48bcdfe269f3b4a425a7968","source":{"kind":"arxiv","id":"1608.07515","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1608.07515","created_at":"2026-05-18T00:55:12Z"},{"alias_kind":"arxiv_version","alias_value":"1608.07515v1","created_at":"2026-05-18T00:55:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1608.07515","created_at":"2026-05-18T00:55:12Z"},{"alias_kind":"pith_short_12","alias_value":"EWFFZ3PWS335","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_16","alias_value":"EWFFZ3PWS335CHXU","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_8","alias_value":"EWFFZ3PW","created_at":"2026-05-18T12:30:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:EWFFZ3PWS335CHXUQKY42J4U7K","target":"record","payload":{"canonical_record":{"source":{"id":"1608.07515","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-08-26T16:40:20Z","cross_cats_sorted":[],"title_canon_sha256":"afdb495b8f3953bb0b5fde633f67a1de6405b993b0ca57ab435a68337aee6c53","abstract_canon_sha256":"24f1ba449a002205c41636d0c96cffc23d1a9c10917d610faa9ac5d5bc674a2e"},"schema_version":"1.0"},"canonical_sha256":"258a5cedf696f7d11ef482b1cd2794fab5dd930bf48bcdfe269f3b4a425a7968","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:55:12.360282Z","signature_b64":"KrVVRXmL+iGqL1Tpo5LDpAhSpCISFlv/S9Hme6DS3+V4mQTGUmTgYbdUsBzemhKGJ+es1qdM17mzwu0YDtuyCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"258a5cedf696f7d11ef482b1cd2794fab5dd930bf48bcdfe269f3b4a425a7968","last_reissued_at":"2026-05-18T00:55:12.359714Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:55:12.359714Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1608.07515","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":"2026-05-18T00:55:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vccVL8WqOmXuCW/e0MfM+5GbDzPzbVysgpqDamdkOBuYwbeZsJPKXv9y6gAQrjOWnLkdHOjaEHnEwHJn3QLoDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T08:29:46.369937Z"},"content_sha256":"e2066118939165646f5088e0145ad178b24379bbd72dcd1c15d728dd27a058ad","schema_version":"1.0","event_id":"sha256:e2066118939165646f5088e0145ad178b24379bbd72dcd1c15d728dd27a058ad"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:EWFFZ3PWS335CHXUQKY42J4U7K","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Thermal Infrared Sky Background for a High-Arctic Mountain Observatory","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Eric Steinbring","submitted_at":"2016-08-26T16:40:20Z","abstract_excerpt":"Nighttime zenith sky spectral brightness in the 3.3 to 20 micron wavelength region is reported for an observatory site nearby Eureka, on Ellesmere Island in the Canadian High Arctic. Measurements derive from an automated Fourier-transform spectrograph which operated continuously there over three consecutive winters. During that time the median through the most transparent portion of the Q window was 460 Jy/square-arcsec, falling below 32 Jy/square-arcsec in N band, and to sub-Jansky levels by M and shortwards; reaching only 36 mJy/square-arcsec within L. Nearly six decades of twice-daily ballo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.07515","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":"2026-05-18T00:55:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZISxjrbjlZyiHnGAuqacSs/OyqJjS50BHvAO3FMdzoHSeg79ZjN31Nrt2aI2dk3NK4v1FgNPeqAB7I1fzvvvCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T08:29:46.370708Z"},"content_sha256":"47409478eb1f6397ccc5fd971b5d71fd0a3783e840050cf93c5043008ac72e75","schema_version":"1.0","event_id":"sha256:47409478eb1f6397ccc5fd971b5d71fd0a3783e840050cf93c5043008ac72e75"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EWFFZ3PWS335CHXUQKY42J4U7K/bundle.json","state_url":"https://pith.science/pith/EWFFZ3PWS335CHXUQKY42J4U7K/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EWFFZ3PWS335CHXUQKY42J4U7K/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":"2026-06-11T08:29:46Z","links":{"resolver":"https://pith.science/pith/EWFFZ3PWS335CHXUQKY42J4U7K","bundle":"https://pith.science/pith/EWFFZ3PWS335CHXUQKY42J4U7K/bundle.json","state":"https://pith.science/pith/EWFFZ3PWS335CHXUQKY42J4U7K/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EWFFZ3PWS335CHXUQKY42J4U7K/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:EWFFZ3PWS335CHXUQKY42J4U7K","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":"24f1ba449a002205c41636d0c96cffc23d1a9c10917d610faa9ac5d5bc674a2e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-08-26T16:40:20Z","title_canon_sha256":"afdb495b8f3953bb0b5fde633f67a1de6405b993b0ca57ab435a68337aee6c53"},"schema_version":"1.0","source":{"id":"1608.07515","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1608.07515","created_at":"2026-05-18T00:55:12Z"},{"alias_kind":"arxiv_version","alias_value":"1608.07515v1","created_at":"2026-05-18T00:55:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1608.07515","created_at":"2026-05-18T00:55:12Z"},{"alias_kind":"pith_short_12","alias_value":"EWFFZ3PWS335","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_16","alias_value":"EWFFZ3PWS335CHXU","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_8","alias_value":"EWFFZ3PW","created_at":"2026-05-18T12:30:15Z"}],"graph_snapshots":[{"event_id":"sha256:47409478eb1f6397ccc5fd971b5d71fd0a3783e840050cf93c5043008ac72e75","target":"graph","created_at":"2026-05-18T00:55:12Z","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":"Nighttime zenith sky spectral brightness in the 3.3 to 20 micron wavelength region is reported for an observatory site nearby Eureka, on Ellesmere Island in the Canadian High Arctic. Measurements derive from an automated Fourier-transform spectrograph which operated continuously there over three consecutive winters. During that time the median through the most transparent portion of the Q window was 460 Jy/square-arcsec, falling below 32 Jy/square-arcsec in N band, and to sub-Jansky levels by M and shortwards; reaching only 36 mJy/square-arcsec within L. Nearly six decades of twice-daily ballo","authors_text":"Eric Steinbring","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-08-26T16:40:20Z","title":"Thermal Infrared Sky Background for a High-Arctic Mountain Observatory"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.07515","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:e2066118939165646f5088e0145ad178b24379bbd72dcd1c15d728dd27a058ad","target":"record","created_at":"2026-05-18T00:55:12Z","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":"24f1ba449a002205c41636d0c96cffc23d1a9c10917d610faa9ac5d5bc674a2e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-08-26T16:40:20Z","title_canon_sha256":"afdb495b8f3953bb0b5fde633f67a1de6405b993b0ca57ab435a68337aee6c53"},"schema_version":"1.0","source":{"id":"1608.07515","kind":"arxiv","version":1}},"canonical_sha256":"258a5cedf696f7d11ef482b1cd2794fab5dd930bf48bcdfe269f3b4a425a7968","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"258a5cedf696f7d11ef482b1cd2794fab5dd930bf48bcdfe269f3b4a425a7968","first_computed_at":"2026-05-18T00:55:12.359714Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:55:12.359714Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KrVVRXmL+iGqL1Tpo5LDpAhSpCISFlv/S9Hme6DS3+V4mQTGUmTgYbdUsBzemhKGJ+es1qdM17mzwu0YDtuyCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:55:12.360282Z","signed_message":"canonical_sha256_bytes"},"source_id":"1608.07515","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e2066118939165646f5088e0145ad178b24379bbd72dcd1c15d728dd27a058ad","sha256:47409478eb1f6397ccc5fd971b5d71fd0a3783e840050cf93c5043008ac72e75"],"state_sha256":"0c31aaaa8283816e187c7ca75da527a4dfefb3323a57aaca08e6fe0b1cba77d0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UPtTfFrEMZISIX2lGYRiBjWUy3/wP1eui7OHgifbsbQ0ldrVgu8v4g5xG8mtzxYjgfxfadDQgusjYG2Jd9QlCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T08:29:46.374928Z","bundle_sha256":"abcc1173daa36b0d23eaf9b01d170320dadb863671f4d44c4acc753cf2f74a8f"}}