{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:WTKBUFYBMJNN6DLLE2M5MXZJPG","short_pith_number":"pith:WTKBUFYB","canonical_record":{"source":{"id":"1607.04568","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-07-15T16:13:08Z","cross_cats_sorted":[],"title_canon_sha256":"f4f618c5cf9137c03f0b6cdd47d86b85d62032f1d29599061ab5fea58e92af57","abstract_canon_sha256":"7863a0f4778033891b66d773aba29b196fa6283e81edf715cc165cc0c97f8ec2"},"schema_version":"1.0"},"canonical_sha256":"b4d41a1701625adf0d6b2699d65f2979870d2cd0dc1c161b8e577f5565f878a4","source":{"kind":"arxiv","id":"1607.04568","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.04568","created_at":"2026-05-18T01:03:18Z"},{"alias_kind":"arxiv_version","alias_value":"1607.04568v2","created_at":"2026-05-18T01:03:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.04568","created_at":"2026-05-18T01:03:18Z"},{"alias_kind":"pith_short_12","alias_value":"WTKBUFYBMJNN","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_16","alias_value":"WTKBUFYBMJNN6DLL","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_8","alias_value":"WTKBUFYB","created_at":"2026-05-18T12:30:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:WTKBUFYBMJNN6DLLE2M5MXZJPG","target":"record","payload":{"canonical_record":{"source":{"id":"1607.04568","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-07-15T16:13:08Z","cross_cats_sorted":[],"title_canon_sha256":"f4f618c5cf9137c03f0b6cdd47d86b85d62032f1d29599061ab5fea58e92af57","abstract_canon_sha256":"7863a0f4778033891b66d773aba29b196fa6283e81edf715cc165cc0c97f8ec2"},"schema_version":"1.0"},"canonical_sha256":"b4d41a1701625adf0d6b2699d65f2979870d2cd0dc1c161b8e577f5565f878a4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:03:18.041646Z","signature_b64":"p/u5znzXMgf2wh1N4/gJi/s1dTp81K1BUOyVtE9ijVPWWoX3eLU03yEKjx9NIYCeDSml0rIx3BrEgcDhM7BWCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b4d41a1701625adf0d6b2699d65f2979870d2cd0dc1c161b8e577f5565f878a4","last_reissued_at":"2026-05-18T01:03:18.041102Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:03:18.041102Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1607.04568","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:03:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AaysyEb1JAc2uPctJQH12KdKgGzklYEerZEy5hSMikml1WYhm6P6s3Cb7FtnUY06pvy5c70j/tAQ1yZloLJ8BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T08:15:30.568221Z"},"content_sha256":"41ac80a42eb370f7aed645bdc54c79eaf88554c34e918ded535b94ca80d6aad4","schema_version":"1.0","event_id":"sha256:41ac80a42eb370f7aed645bdc54c79eaf88554c34e918ded535b94ca80d6aad4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:WTKBUFYBMJNN6DLLE2M5MXZJPG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Polarized near-infrared light of the Dusty S-cluster Object (DSO/G2) at the Galactic Center","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Eckart, B. Shahzamanian, C. Straubmeier, F. Peissker, L. Moser, M. Parsa, M. Valencia-S., M. Zajacek, N. Sabha","submitted_at":"2016-07-15T16:13:08Z","abstract_excerpt":"We investigate an infrared-excess source called G2 or Dusty S-cluster Object (DSO) moving on a highly eccentric orbit around the Galaxy's central black hole, Sgr A*. We use, for the first time, near-infrared polarimetric imaging data to determine the nature and the properties of the DSO, and obtain an improved K_s-band identification of this source in median polarimetry images of different observing years. The source starts to deviate from the stellar confusion in 2008, and it does not show any flux density variability over the years we analyzed it. We measure the polarization degree and angle"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.04568","kind":"arxiv","version":2},"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":"2026-05-18T01:03:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hRmdnllWO1i/HzXeZUtuK1Ob+KRVnQlQZhpbt9FFvl5lNj2dtq0uLpVVFthOqJPA8DtnpxH/JBgPjrNo9NFADg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T08:15:30.568585Z"},"content_sha256":"1821ee92bfca48e622ceda8b1234bbf83bbf7a4e932907c8f756355c5058ffdb","schema_version":"1.0","event_id":"sha256:1821ee92bfca48e622ceda8b1234bbf83bbf7a4e932907c8f756355c5058ffdb"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WTKBUFYBMJNN6DLLE2M5MXZJPG/bundle.json","state_url":"https://pith.science/pith/WTKBUFYBMJNN6DLLE2M5MXZJPG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WTKBUFYBMJNN6DLLE2M5MXZJPG/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":"2026-06-03T08:15:30Z","links":{"resolver":"https://pith.science/pith/WTKBUFYBMJNN6DLLE2M5MXZJPG","bundle":"https://pith.science/pith/WTKBUFYBMJNN6DLLE2M5MXZJPG/bundle.json","state":"https://pith.science/pith/WTKBUFYBMJNN6DLLE2M5MXZJPG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WTKBUFYBMJNN6DLLE2M5MXZJPG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:WTKBUFYBMJNN6DLLE2M5MXZJPG","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":"7863a0f4778033891b66d773aba29b196fa6283e81edf715cc165cc0c97f8ec2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-07-15T16:13:08Z","title_canon_sha256":"f4f618c5cf9137c03f0b6cdd47d86b85d62032f1d29599061ab5fea58e92af57"},"schema_version":"1.0","source":{"id":"1607.04568","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.04568","created_at":"2026-05-18T01:03:18Z"},{"alias_kind":"arxiv_version","alias_value":"1607.04568v2","created_at":"2026-05-18T01:03:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.04568","created_at":"2026-05-18T01:03:18Z"},{"alias_kind":"pith_short_12","alias_value":"WTKBUFYBMJNN","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_16","alias_value":"WTKBUFYBMJNN6DLL","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_8","alias_value":"WTKBUFYB","created_at":"2026-05-18T12:30:51Z"}],"graph_snapshots":[{"event_id":"sha256:1821ee92bfca48e622ceda8b1234bbf83bbf7a4e932907c8f756355c5058ffdb","target":"graph","created_at":"2026-05-18T01:03:18Z","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 an infrared-excess source called G2 or Dusty S-cluster Object (DSO) moving on a highly eccentric orbit around the Galaxy's central black hole, Sgr A*. We use, for the first time, near-infrared polarimetric imaging data to determine the nature and the properties of the DSO, and obtain an improved K_s-band identification of this source in median polarimetry images of different observing years. The source starts to deviate from the stellar confusion in 2008, and it does not show any flux density variability over the years we analyzed it. We measure the polarization degree and angle","authors_text":"A. Eckart, B. Shahzamanian, C. Straubmeier, F. Peissker, L. Moser, M. Parsa, M. Valencia-S., M. Zajacek, N. Sabha","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-07-15T16:13:08Z","title":"Polarized near-infrared light of the Dusty S-cluster Object (DSO/G2) at the Galactic Center"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.04568","kind":"arxiv","version":2},"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":"sha256:41ac80a42eb370f7aed645bdc54c79eaf88554c34e918ded535b94ca80d6aad4","target":"record","created_at":"2026-05-18T01:03:18Z","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":"7863a0f4778033891b66d773aba29b196fa6283e81edf715cc165cc0c97f8ec2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-07-15T16:13:08Z","title_canon_sha256":"f4f618c5cf9137c03f0b6cdd47d86b85d62032f1d29599061ab5fea58e92af57"},"schema_version":"1.0","source":{"id":"1607.04568","kind":"arxiv","version":2}},"canonical_sha256":"b4d41a1701625adf0d6b2699d65f2979870d2cd0dc1c161b8e577f5565f878a4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b4d41a1701625adf0d6b2699d65f2979870d2cd0dc1c161b8e577f5565f878a4","first_computed_at":"2026-05-18T01:03:18.041102Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:03:18.041102Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"p/u5znzXMgf2wh1N4/gJi/s1dTp81K1BUOyVtE9ijVPWWoX3eLU03yEKjx9NIYCeDSml0rIx3BrEgcDhM7BWCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:03:18.041646Z","signed_message":"canonical_sha256_bytes"},"source_id":"1607.04568","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:41ac80a42eb370f7aed645bdc54c79eaf88554c34e918ded535b94ca80d6aad4","sha256:1821ee92bfca48e622ceda8b1234bbf83bbf7a4e932907c8f756355c5058ffdb"],"state_sha256":"9ee50efa2566c44e009d232949b592b21f427e5520de6bb828b11e79d7c24bf0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"avsyo4gwZJ/q06RD05+VwHgpf8roJYWZuwObi8d8Ylfr/rDKKD3jEKDnIlSXrR8h1BqJVkOURnLXKvRAJmbwDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T08:15:30.570852Z","bundle_sha256":"b06d7da42b0d8d95cd7c730fc4287b524af40e3ed88f2c6b06fad865d1ea8b6e"}}