{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:WJZ4FQIBDEBRLKAXGUQ7KJ2YOY","short_pith_number":"pith:WJZ4FQIB","canonical_record":{"source":{"id":"1609.04820","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-09-15T20:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"f0bc15eccdd4554f309daeeb194ef6e7cfb8211cb1fb143d844f8e139d968cc4","abstract_canon_sha256":"2399049a93254eb42bf41e1a86bc2aa89c39605b1458379fe5994478ff29a6d1"},"schema_version":"1.0"},"canonical_sha256":"b273c2c101190315a8173521f52758761c72d7fded76f936354a106073181dec","source":{"kind":"arxiv","id":"1609.04820","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1609.04820","created_at":"2026-05-18T01:00:41Z"},{"alias_kind":"arxiv_version","alias_value":"1609.04820v1","created_at":"2026-05-18T01:00:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.04820","created_at":"2026-05-18T01:00:41Z"},{"alias_kind":"pith_short_12","alias_value":"WJZ4FQIBDEBR","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_16","alias_value":"WJZ4FQIBDEBRLKAX","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_8","alias_value":"WJZ4FQIB","created_at":"2026-05-18T12:30:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:WJZ4FQIBDEBRLKAXGUQ7KJ2YOY","target":"record","payload":{"canonical_record":{"source":{"id":"1609.04820","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-09-15T20:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"f0bc15eccdd4554f309daeeb194ef6e7cfb8211cb1fb143d844f8e139d968cc4","abstract_canon_sha256":"2399049a93254eb42bf41e1a86bc2aa89c39605b1458379fe5994478ff29a6d1"},"schema_version":"1.0"},"canonical_sha256":"b273c2c101190315a8173521f52758761c72d7fded76f936354a106073181dec","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:00:41.807166Z","signature_b64":"NNALQcUCQaNv9vhLf3QDbphGV6AofB5zZvoH96nHloxR67wp8OphqrWYlLdpjjZ20tQUcPsrAzFmmHm8M4Q5BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b273c2c101190315a8173521f52758761c72d7fded76f936354a106073181dec","last_reissued_at":"2026-05-18T01:00:41.806770Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:00:41.806770Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1609.04820","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":"2026-05-18T01:00:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xr9BOGojkSRYjdlM835wikowWeKnQR2BMu3JX36zugriPm8k5skJbTkl8K7mtX2JT0ZlEerWxVVPSj/Rq2KgAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T14:27:53.239474Z"},"content_sha256":"b01af57ee061770792f6c73867f13a73356e464966f00b49b630b0429e40cbf5","schema_version":"1.0","event_id":"sha256:b01af57ee061770792f6c73867f13a73356e464966f00b49b630b0429e40cbf5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:WJZ4FQIBDEBRLKAXGUQ7KJ2YOY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Discovery of a Low-Luminosity SPIRAL DRAGN","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A.M.M. Scaife, A.O.Clarke, D.D.Mulcahy, H.Kobayashi, H.Matsumoto, I.Mitsuishi, M.Y.Mao, R.Suganuma, Y.Babazaki, Y.Tawara","submitted_at":"2016-09-15T20:00:01Z","abstract_excerpt":"Standard galaxy formation models predict that large-scale double-lobed radio sources, known as DRAGNs, will always be hosted by elliptical galaxies. In spite of this, in recent years a small number of spiral galaxies have also been found to host such sources. These so-called spiral DRAGNs are still extremely rare, with only $\\sim 5$ cases being widely accepted. Here we report on the serendipitous discovery of a new spiral DRAGN in data from the Giant Metrewave Radio Telescope (GMRT) at 322 MHz. The host galaxy, MCG+07-47-10, is a face-on late-type Sbc galaxy with distinctive spiral arms and pr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.04820","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":"2026-05-18T01:00:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LIACgX0O//BcOzO8936x4SnVLHH4Fn8GBHFIXA6gRjxT9vrlsQHeW0R1G+O2fBxrS3+mgBfmyM4qs35xuH+bAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T14:27:53.240076Z"},"content_sha256":"ad65f33904bf2c2e0108e7744cf9330cae84ebe2244fdebb815cc98e430488fe","schema_version":"1.0","event_id":"sha256:ad65f33904bf2c2e0108e7744cf9330cae84ebe2244fdebb815cc98e430488fe"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WJZ4FQIBDEBRLKAXGUQ7KJ2YOY/bundle.json","state_url":"https://pith.science/pith/WJZ4FQIBDEBRLKAXGUQ7KJ2YOY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WJZ4FQIBDEBRLKAXGUQ7KJ2YOY/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":"2026-05-30T14:27:53Z","links":{"resolver":"https://pith.science/pith/WJZ4FQIBDEBRLKAXGUQ7KJ2YOY","bundle":"https://pith.science/pith/WJZ4FQIBDEBRLKAXGUQ7KJ2YOY/bundle.json","state":"https://pith.science/pith/WJZ4FQIBDEBRLKAXGUQ7KJ2YOY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WJZ4FQIBDEBRLKAXGUQ7KJ2YOY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:WJZ4FQIBDEBRLKAXGUQ7KJ2YOY","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":"2399049a93254eb42bf41e1a86bc2aa89c39605b1458379fe5994478ff29a6d1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-09-15T20:00:01Z","title_canon_sha256":"f0bc15eccdd4554f309daeeb194ef6e7cfb8211cb1fb143d844f8e139d968cc4"},"schema_version":"1.0","source":{"id":"1609.04820","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1609.04820","created_at":"2026-05-18T01:00:41Z"},{"alias_kind":"arxiv_version","alias_value":"1609.04820v1","created_at":"2026-05-18T01:00:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.04820","created_at":"2026-05-18T01:00:41Z"},{"alias_kind":"pith_short_12","alias_value":"WJZ4FQIBDEBR","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_16","alias_value":"WJZ4FQIBDEBRLKAX","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_8","alias_value":"WJZ4FQIB","created_at":"2026-05-18T12:30:48Z"}],"graph_snapshots":[{"event_id":"sha256:ad65f33904bf2c2e0108e7744cf9330cae84ebe2244fdebb815cc98e430488fe","target":"graph","created_at":"2026-05-18T01:00:41Z","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":"Standard galaxy formation models predict that large-scale double-lobed radio sources, known as DRAGNs, will always be hosted by elliptical galaxies. In spite of this, in recent years a small number of spiral galaxies have also been found to host such sources. These so-called spiral DRAGNs are still extremely rare, with only $\\sim 5$ cases being widely accepted. Here we report on the serendipitous discovery of a new spiral DRAGN in data from the Giant Metrewave Radio Telescope (GMRT) at 322 MHz. The host galaxy, MCG+07-47-10, is a face-on late-type Sbc galaxy with distinctive spiral arms and pr","authors_text":"A.M.M. Scaife, A.O.Clarke, D.D.Mulcahy, H.Kobayashi, H.Matsumoto, I.Mitsuishi, M.Y.Mao, R.Suganuma, Y.Babazaki, Y.Tawara","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-09-15T20:00:01Z","title":"The Discovery of a Low-Luminosity SPIRAL DRAGN"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.04820","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:b01af57ee061770792f6c73867f13a73356e464966f00b49b630b0429e40cbf5","target":"record","created_at":"2026-05-18T01:00:41Z","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":"2399049a93254eb42bf41e1a86bc2aa89c39605b1458379fe5994478ff29a6d1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-09-15T20:00:01Z","title_canon_sha256":"f0bc15eccdd4554f309daeeb194ef6e7cfb8211cb1fb143d844f8e139d968cc4"},"schema_version":"1.0","source":{"id":"1609.04820","kind":"arxiv","version":1}},"canonical_sha256":"b273c2c101190315a8173521f52758761c72d7fded76f936354a106073181dec","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b273c2c101190315a8173521f52758761c72d7fded76f936354a106073181dec","first_computed_at":"2026-05-18T01:00:41.806770Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:00:41.806770Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NNALQcUCQaNv9vhLf3QDbphGV6AofB5zZvoH96nHloxR67wp8OphqrWYlLdpjjZ20tQUcPsrAzFmmHm8M4Q5BQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:00:41.807166Z","signed_message":"canonical_sha256_bytes"},"source_id":"1609.04820","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b01af57ee061770792f6c73867f13a73356e464966f00b49b630b0429e40cbf5","sha256:ad65f33904bf2c2e0108e7744cf9330cae84ebe2244fdebb815cc98e430488fe"],"state_sha256":"c2b5fc5aeeb0058caf0b2130569a355c4987ede201e5d2537312a720d8fe3c16"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HISgJOhJFmPAkWo4wzOkkLQWdjx4f5YENMX+O2XGurw8D5jKEDehN430viMgC9QGWuTBZrCxaHkJjzm6e4RyAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T14:27:53.243193Z","bundle_sha256":"b9471c485867d9acf2e10f2b9204cad2ddfe2c1a63e5af7f32a9f832d3987c27"}}