Pith Number

pith:Z4AV7SF2

pith:2009:Z4AV7SF2BHWBSYCENZSX6I4I3J

not attested not anchored not stored refs pending

Polarized Emission of Sagittarius A*

Christopher L. Fryer, Hui Li, Lei Huang, Mike J. Cai, Siming Liu, Ye-Fei Yuan, Zhi-Qiang Shen

arxiv:0907.5463 v1 · 2009-07-31 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Z4AV7SF2BHWBSYCENZSX6I4I3J}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

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.

Receipt and verification

First computed	2026-05-18T02:12:45.877332Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cf015fc8ba09ec1960446e657f2388da51a9f05653841c162d098cc147ee8349

Aliases

arxiv: 0907.5463 · arxiv_version: 0907.5463v1 · doi: 10.48550/arxiv.0907.5463 · pith_short_12: Z4AV7SF2BHWB · pith_short_16: Z4AV7SF2BHWBSYCE · pith_short_8: Z4AV7SF2

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/Z4AV7SF2BHWBSYCENZSX6I4I3J \
  | 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: cf015fc8ba09ec1960446e657f2388da51a9f05653841c162d098cc147ee8349

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0f77ece1bc97c0845a504e4ad3f99e9c22303f4da02ffda3790ca96462d2dbf7",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/3.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-07-31T03:51:43Z",
    "title_canon_sha256": "996388be9de41fe8bd42b22042bfa7fa93ee8a830503ab0e104f1338f8393058"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.5463",
    "kind": "arxiv",
    "version": 1
  }
}