{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:7HDSI7KPQ7TYL7HLLQF6VK3I7T","short_pith_number":"pith:7HDSI7KP","canonical_record":{"source":{"id":"1611.03160","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-11-10T01:55:00Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"603b6dcbe74bd441bd456066c214872f033fd756451511dc7e5a268a1690d2bb","abstract_canon_sha256":"947d33c485d1fd395808be5a4a5b13c03eff4feb3b97fca713770052a3177714"},"schema_version":"1.0"},"canonical_sha256":"f9c7247d4f87e785fceb5c0beaab68fcdebb5bbad99a68f2304407d6a6f8c228","source":{"kind":"arxiv","id":"1611.03160","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1611.03160","created_at":"2026-05-18T00:59:41Z"},{"alias_kind":"arxiv_version","alias_value":"1611.03160v1","created_at":"2026-05-18T00:59:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1611.03160","created_at":"2026-05-18T00:59:41Z"},{"alias_kind":"pith_short_12","alias_value":"7HDSI7KPQ7TY","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_16","alias_value":"7HDSI7KPQ7TYL7HL","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_8","alias_value":"7HDSI7KP","created_at":"2026-05-18T12:30:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:7HDSI7KPQ7TYL7HLLQF6VK3I7T","target":"record","payload":{"canonical_record":{"source":{"id":"1611.03160","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-11-10T01:55:00Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"603b6dcbe74bd441bd456066c214872f033fd756451511dc7e5a268a1690d2bb","abstract_canon_sha256":"947d33c485d1fd395808be5a4a5b13c03eff4feb3b97fca713770052a3177714"},"schema_version":"1.0"},"canonical_sha256":"f9c7247d4f87e785fceb5c0beaab68fcdebb5bbad99a68f2304407d6a6f8c228","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:59:41.166478Z","signature_b64":"cHZqRk+C3Uank5GBst0ilwL9smZtwu6jzBcG7k14FNz0UILeTQ7gMrTTK8042RA8jqFjxta2OlGZ4h6BKDG9AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f9c7247d4f87e785fceb5c0beaab68fcdebb5bbad99a68f2304407d6a6f8c228","last_reissued_at":"2026-05-18T00:59:41.165784Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:59:41.165784Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1611.03160","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":"2026-05-18T00:59:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4QEDMl/Tc1MxfiB9eYa5b5E1AiBLKURVRX469RiUU9nCM3C9ph3GZDftVLn7UDcsxxG6LuQFTwf4Xq8QhOj5Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T20:04:16.673987Z"},"content_sha256":"448b4691b87bdd1c82f98d2db11afaaa7e054cacb2069aba2793bf8cbad729e9","schema_version":"1.0","event_id":"sha256:448b4691b87bdd1c82f98d2db11afaaa7e054cacb2069aba2793bf8cbad729e9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:7HDSI7KPQ7TYL7HLLQF6VK3I7T","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Discovery of a fourth arc in Abell 2626 at 610 MHz with the GMRT: Spectral properties and possibilities for the origin","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"(2) Physics, 3) ((1) National Centre for Radio Astrophysics, Astronomy Department, Myriam Gitti (2, Pune, Ruta Kale (1), TIFR, University of Bologna (3) INAF Istituto di Radioastronomia di Bologna)","submitted_at":"2016-11-10T01:55:00Z","abstract_excerpt":"We report the discovery of a fourth eastern arc (Arc E) towards the cool-core cluster Abell 2626 using 610 MHz Giant Metrewave Radio Telescope observations. Three arcs towards north, west and south were known from earlier works at 1400 MHz and proposed to have originated in precessing radio jets of the central active galactic nucleus. The 610 - 1400 MHz integrated spectral indices of the arcs are in the range 3.2 - 3.6 and the spectral index map shows uniform distribution along the lengths of the arcs. If associated with A2626, the arcs have linear extents in the range 79 - 152 kpc. The detect"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1611.03160","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":"2026-05-18T00:59:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LTUWfWRW8sQ8EuDfqewHWxIKmf9hRL0ryv5cu/DGbNXJG1yLW3Rvy5qBG2ZgtAE3YQmGkt38m5pK/q71pQ52CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T20:04:16.674381Z"},"content_sha256":"174ba3e0c3b6075766ed6ae175f8920f49d207dca72c8d6d2f347c54de22675e","schema_version":"1.0","event_id":"sha256:174ba3e0c3b6075766ed6ae175f8920f49d207dca72c8d6d2f347c54de22675e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7HDSI7KPQ7TYL7HLLQF6VK3I7T/bundle.json","state_url":"https://pith.science/pith/7HDSI7KPQ7TYL7HLLQF6VK3I7T/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7HDSI7KPQ7TYL7HLLQF6VK3I7T/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":"2026-05-30T20:04:16Z","links":{"resolver":"https://pith.science/pith/7HDSI7KPQ7TYL7HLLQF6VK3I7T","bundle":"https://pith.science/pith/7HDSI7KPQ7TYL7HLLQF6VK3I7T/bundle.json","state":"https://pith.science/pith/7HDSI7KPQ7TYL7HLLQF6VK3I7T/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7HDSI7KPQ7TYL7HLLQF6VK3I7T/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:7HDSI7KPQ7TYL7HLLQF6VK3I7T","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":"947d33c485d1fd395808be5a4a5b13c03eff4feb3b97fca713770052a3177714","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-11-10T01:55:00Z","title_canon_sha256":"603b6dcbe74bd441bd456066c214872f033fd756451511dc7e5a268a1690d2bb"},"schema_version":"1.0","source":{"id":"1611.03160","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1611.03160","created_at":"2026-05-18T00:59:41Z"},{"alias_kind":"arxiv_version","alias_value":"1611.03160v1","created_at":"2026-05-18T00:59:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1611.03160","created_at":"2026-05-18T00:59:41Z"},{"alias_kind":"pith_short_12","alias_value":"7HDSI7KPQ7TY","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_16","alias_value":"7HDSI7KPQ7TYL7HL","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_8","alias_value":"7HDSI7KP","created_at":"2026-05-18T12:30:04Z"}],"graph_snapshots":[{"event_id":"sha256:174ba3e0c3b6075766ed6ae175f8920f49d207dca72c8d6d2f347c54de22675e","target":"graph","created_at":"2026-05-18T00:59:41Z","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 report the discovery of a fourth eastern arc (Arc E) towards the cool-core cluster Abell 2626 using 610 MHz Giant Metrewave Radio Telescope observations. Three arcs towards north, west and south were known from earlier works at 1400 MHz and proposed to have originated in precessing radio jets of the central active galactic nucleus. The 610 - 1400 MHz integrated spectral indices of the arcs are in the range 3.2 - 3.6 and the spectral index map shows uniform distribution along the lengths of the arcs. If associated with A2626, the arcs have linear extents in the range 79 - 152 kpc. The detect","authors_text":"(2) Physics, 3) ((1) National Centre for Radio Astrophysics, Astronomy Department, Myriam Gitti (2, Pune, Ruta Kale (1), TIFR, University of Bologna (3) INAF Istituto di Radioastronomia di Bologna)","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-11-10T01:55:00Z","title":"Discovery of a fourth arc in Abell 2626 at 610 MHz with the GMRT: Spectral properties and possibilities for the origin"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1611.03160","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":"sha256:448b4691b87bdd1c82f98d2db11afaaa7e054cacb2069aba2793bf8cbad729e9","target":"record","created_at":"2026-05-18T00:59:41Z","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":"947d33c485d1fd395808be5a4a5b13c03eff4feb3b97fca713770052a3177714","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-11-10T01:55:00Z","title_canon_sha256":"603b6dcbe74bd441bd456066c214872f033fd756451511dc7e5a268a1690d2bb"},"schema_version":"1.0","source":{"id":"1611.03160","kind":"arxiv","version":1}},"canonical_sha256":"f9c7247d4f87e785fceb5c0beaab68fcdebb5bbad99a68f2304407d6a6f8c228","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f9c7247d4f87e785fceb5c0beaab68fcdebb5bbad99a68f2304407d6a6f8c228","first_computed_at":"2026-05-18T00:59:41.165784Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:59:41.165784Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"cHZqRk+C3Uank5GBst0ilwL9smZtwu6jzBcG7k14FNz0UILeTQ7gMrTTK8042RA8jqFjxta2OlGZ4h6BKDG9AQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:59:41.166478Z","signed_message":"canonical_sha256_bytes"},"source_id":"1611.03160","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:448b4691b87bdd1c82f98d2db11afaaa7e054cacb2069aba2793bf8cbad729e9","sha256:174ba3e0c3b6075766ed6ae175f8920f49d207dca72c8d6d2f347c54de22675e"],"state_sha256":"dd234e08fede3e327aa629a8d836011b62d32b9f63cc210015b85a696a64634b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jAmo4QcBGH0NTCnvOZwpW+uWWXLudywsF1Le2Y/LpxochSUiH273iTTMh0ZW6VDzg6sFFrKQpueYvKlqgPDcCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T20:04:16.676815Z","bundle_sha256":"a99e25d5bb71b82837f39cef2af243bb470317da0902ba15503e8cb04f6158e4"}}