Pith Number

pith:PI63DLYD

pith:2014:PI63DLYD7RCE2MHVMNYXRFGJYZ

not attested not anchored not stored refs pending

A General Relativistic Null Hypothesis Test with Event Horizon Telescope Observations of the black-hole shadow in Sgr A*

Chi-kwan Chan, Daniel P. Marrone, Dimitrios Psaltis, Feryal Ozel

arxiv:1411.1454 v2 · 2014-11-06 · astro-ph.HE

Open paper page JSON Open Graph Bundle Merged state What is a Pith Number?

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Cited by

2 papers in Pith

Reshaping the inner shadow of a Kerr black hole by a torn accretion disk

Probing Kalb-Ramond gravity with charged rotating black holes: constraints from EHT observations

Receipt and verification

First computed	2026-05-18T01:25:39.669280Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7a3db1af03fc444d30f563717894c9c658c6dd725ad23c00ddd8e2541b6c62cc

Aliases

arxiv: 1411.1454 · arxiv_version: 1411.1454v2 · doi: 10.48550/arxiv.1411.1454 · pith_short_12: PI63DLYD7RCE · pith_short_16: PI63DLYD7RCE2MHV · pith_short_8: PI63DLYD

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/PI63DLYD7RCE2MHVMNYXRFGJYZ \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 7a3db1af03fc444d30f563717894c9c658c6dd725ad23c00ddd8e2541b6c62cc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c1a4c35bd796a9b6ecd7f1b6c7e11a5cced7e6619bad8dc903d91460753c619c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2014-11-06T00:03:38Z",
    "title_canon_sha256": "aeed08d74406305025f03dcf758adfc3ebcfd1223719decfcd66774c6121cb1e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1411.1454",
    "kind": "arxiv",
    "version": 2
  }
}