Pith Number

pith:SKEYQT5X

pith:2004:SKEYQT5XAIWAOCMHIEWJP4J5QJ

not attested not anchored not stored refs pending

Detection of the Intrinsic Size of Sagittarius A* through Closure Amplitude Imaging (includes Online Supporting Material)

& Donald C. Backer, Geoffrey C. Bower, Heino Falcke, Jun-Hui Zhao, Robeson M. Herrnstein, W.M. Goss

arxiv:astro-ph/0404001 v1 · 2004-03-31 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SKEYQT5XAIWAOCMHIEWJP4J5QJ}

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.

Cited by

1 paper in Pith

VAPOLA -- A multi-year, multi-band polarization survey of AGN and Sgr A* at mm wavelengths with ALMA I. Survey Overview and Science-Ready Archival Products

Receipt and verification

First computed	2026-07-04T16:43:30.077467Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9289884fb7022c070987412c97f13d824355490af03ff44135b8f0294a5c7cd7

Aliases

arxiv: astro-ph/0404001 · arxiv_version: astro-ph/0404001v1 · doi: 10.48550/arxiv.astro-ph/0404001 · pith_short_12: SKEYQT5XAIWA · pith_short_16: SKEYQT5XAIWAOCMH · pith_short_8: SKEYQT5X

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/SKEYQT5XAIWAOCMHIEWJP4J5QJ \
  | 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: 9289884fb7022c070987412c97f13d824355490af03ff44135b8f0294a5c7cd7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "97ef014005d7ad0a4de271dd0d1c5270f7988b297a8acccc555a027fe1b3b291",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-03-31T21:04:04Z",
    "title_canon_sha256": "d7ea244e7980cbc3f3b335e9a69462b3ecb97f97e1fa832b9ea4fd88ca95e862"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0404001",
    "kind": "arxiv",
    "version": 1
  }
}