{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:RLCCGMFADC53VJYB3GYYSJKAX4","short_pith_number":"pith:RLCCGMFA","canonical_record":{"source":{"id":"1808.08044","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-08-24T08:19:22Z","cross_cats_sorted":[],"title_canon_sha256":"9256a892bddbbd05434df74519cc0ec31bb48171e14ce9d0245d3fc5e6dae8ff","abstract_canon_sha256":"1486f65e827f5e635103bf17f7d86beb3a4c997278365921206183e182809a71"},"schema_version":"1.0"},"canonical_sha256":"8ac42330a018bbbaa701d9b1892540bf25670e987d71793a783575e6a62742ed","source":{"kind":"arxiv","id":"1808.08044","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.08044","created_at":"2026-05-18T00:02:31Z"},{"alias_kind":"arxiv_version","alias_value":"1808.08044v1","created_at":"2026-05-18T00:02:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.08044","created_at":"2026-05-18T00:02:31Z"},{"alias_kind":"pith_short_12","alias_value":"RLCCGMFADC53","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_16","alias_value":"RLCCGMFADC53VJYB","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_8","alias_value":"RLCCGMFA","created_at":"2026-05-18T12:32:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:RLCCGMFADC53VJYB3GYYSJKAX4","target":"record","payload":{"canonical_record":{"source":{"id":"1808.08044","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-08-24T08:19:22Z","cross_cats_sorted":[],"title_canon_sha256":"9256a892bddbbd05434df74519cc0ec31bb48171e14ce9d0245d3fc5e6dae8ff","abstract_canon_sha256":"1486f65e827f5e635103bf17f7d86beb3a4c997278365921206183e182809a71"},"schema_version":"1.0"},"canonical_sha256":"8ac42330a018bbbaa701d9b1892540bf25670e987d71793a783575e6a62742ed","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:02:31.048510Z","signature_b64":"FM1GBvA+KE4HMkx0C7BNYxjiCbJutbUJiwdhAYB0xu6TbGomoxT2OGsHSKZ5g6oXpyDmyCZg4B7uU++uN6EYCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8ac42330a018bbbaa701d9b1892540bf25670e987d71793a783575e6a62742ed","last_reissued_at":"2026-05-18T00:02:31.047887Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:02:31.047887Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1808.08044","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":"2026-05-18T00:02:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1cUrhHHaWTsiPQ9XrSHbTvERV/uSBaCB82pne2FgkFYVCdO2tao49T5SKMOI5ypB28OZN5ENGAuOzn+5+spDCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T08:57:24.036758Z"},"content_sha256":"052b533df5122bad9ec2007f55d068523fe71beef56dee67f26ac66e79025682","schema_version":"1.0","event_id":"sha256:052b533df5122bad9ec2007f55d068523fe71beef56dee67f26ac66e79025682"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:RLCCGMFADC53VJYB3GYYSJKAX4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Hunting for Statistical Anisotropy in Tensor Modes with B-mode Observations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Ippei Obata, Shuichiro Yokoyama, Takashi Hiramatsu, Tomohiro Fujita","submitted_at":"2018-08-24T08:19:22Z","abstract_excerpt":"We investigate a possibility of constraining statistical anisotropies of the primordial tensor perturbations by using future observations for the Cosmic Microwave Background (CMB) B-mode polarization. By parameterizing a statistically-anisotropic tensor power spectrum as $P_h ({\\boldsymbol{k}}) = P_h (k) \\sum_n g_n \\cos^n \\theta_{\\boldsymbol{k}}$, where $\\theta_{\\boldsymbol{k}}$ is an angle of the direction of $\\hat{k}={\\boldsymbol{k}}/k$ from a preferred direction, we find that it would be possible for future B-mode observations such as CMB-S4 to detect the tensor statistical anisotropy at th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.08044","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":"2026-05-18T00:02:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dUe6GrZwms4rHgkdTQzyTX+ST7eCTSV6se/f8nMPsmBssdIw1gVa69W4FYpENSdA4/1HUGJPVzEC/LRIfl0GCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T08:57:24.037100Z"},"content_sha256":"41b49ba46b2d95a3b05726a69f82b4f49a0413fc47ac2fd3550d4f1b70bf9c3a","schema_version":"1.0","event_id":"sha256:41b49ba46b2d95a3b05726a69f82b4f49a0413fc47ac2fd3550d4f1b70bf9c3a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RLCCGMFADC53VJYB3GYYSJKAX4/bundle.json","state_url":"https://pith.science/pith/RLCCGMFADC53VJYB3GYYSJKAX4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RLCCGMFADC53VJYB3GYYSJKAX4/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":"2026-05-30T08:57:24Z","links":{"resolver":"https://pith.science/pith/RLCCGMFADC53VJYB3GYYSJKAX4","bundle":"https://pith.science/pith/RLCCGMFADC53VJYB3GYYSJKAX4/bundle.json","state":"https://pith.science/pith/RLCCGMFADC53VJYB3GYYSJKAX4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RLCCGMFADC53VJYB3GYYSJKAX4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:RLCCGMFADC53VJYB3GYYSJKAX4","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":"1486f65e827f5e635103bf17f7d86beb3a4c997278365921206183e182809a71","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-08-24T08:19:22Z","title_canon_sha256":"9256a892bddbbd05434df74519cc0ec31bb48171e14ce9d0245d3fc5e6dae8ff"},"schema_version":"1.0","source":{"id":"1808.08044","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.08044","created_at":"2026-05-18T00:02:31Z"},{"alias_kind":"arxiv_version","alias_value":"1808.08044v1","created_at":"2026-05-18T00:02:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.08044","created_at":"2026-05-18T00:02:31Z"},{"alias_kind":"pith_short_12","alias_value":"RLCCGMFADC53","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_16","alias_value":"RLCCGMFADC53VJYB","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_8","alias_value":"RLCCGMFA","created_at":"2026-05-18T12:32:50Z"}],"graph_snapshots":[{"event_id":"sha256:41b49ba46b2d95a3b05726a69f82b4f49a0413fc47ac2fd3550d4f1b70bf9c3a","target":"graph","created_at":"2026-05-18T00:02:31Z","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 investigate a possibility of constraining statistical anisotropies of the primordial tensor perturbations by using future observations for the Cosmic Microwave Background (CMB) B-mode polarization. By parameterizing a statistically-anisotropic tensor power spectrum as $P_h ({\\boldsymbol{k}}) = P_h (k) \\sum_n g_n \\cos^n \\theta_{\\boldsymbol{k}}$, where $\\theta_{\\boldsymbol{k}}$ is an angle of the direction of $\\hat{k}={\\boldsymbol{k}}/k$ from a preferred direction, we find that it would be possible for future B-mode observations such as CMB-S4 to detect the tensor statistical anisotropy at th","authors_text":"Ippei Obata, Shuichiro Yokoyama, Takashi Hiramatsu, Tomohiro Fujita","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-08-24T08:19:22Z","title":"Hunting for Statistical Anisotropy in Tensor Modes with B-mode Observations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.08044","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":"sha256:052b533df5122bad9ec2007f55d068523fe71beef56dee67f26ac66e79025682","target":"record","created_at":"2026-05-18T00:02:31Z","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":"1486f65e827f5e635103bf17f7d86beb3a4c997278365921206183e182809a71","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-08-24T08:19:22Z","title_canon_sha256":"9256a892bddbbd05434df74519cc0ec31bb48171e14ce9d0245d3fc5e6dae8ff"},"schema_version":"1.0","source":{"id":"1808.08044","kind":"arxiv","version":1}},"canonical_sha256":"8ac42330a018bbbaa701d9b1892540bf25670e987d71793a783575e6a62742ed","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8ac42330a018bbbaa701d9b1892540bf25670e987d71793a783575e6a62742ed","first_computed_at":"2026-05-18T00:02:31.047887Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:02:31.047887Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"FM1GBvA+KE4HMkx0C7BNYxjiCbJutbUJiwdhAYB0xu6TbGomoxT2OGsHSKZ5g6oXpyDmyCZg4B7uU++uN6EYCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:02:31.048510Z","signed_message":"canonical_sha256_bytes"},"source_id":"1808.08044","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:052b533df5122bad9ec2007f55d068523fe71beef56dee67f26ac66e79025682","sha256:41b49ba46b2d95a3b05726a69f82b4f49a0413fc47ac2fd3550d4f1b70bf9c3a"],"state_sha256":"ee7473b4750651b11bbd8394fc683638a6d8a837dee80474bbb1e230f0e96e86"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PLv9ZOb7OQAiWedYK9bB5rr5sEEKs8Ob2RoeNqR7WJAPC2Q8TCSkDxs3D7Aj779BrvW5aZtNAVpQholXMk6IDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T08:57:24.039287Z","bundle_sha256":"c92ca6e7fe2a9068d5707b2464fbca22b971b136b2fcc15481dfa3880750df66"}}