Pith Number

pith:MVL6HA7Q

pith:2018:MVL6HA7QMC3FMHIT6HWWIARQVF

not attested not anchored not stored refs pending

Testing General Relativity with the Black Hole Shadow Size and Asymmetry of Sagittarius A*: Limitations from Interstellar Scattering

Michael D. Johnson, Ramesh Narayan, Ziyan Zhu

arxiv:1811.02079 v1 · 2018-11-05 · astro-ph.IM · 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{MVL6HA7QMC3FMHIT6HWWIARQVF}

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	2026-05-17T23:56:45.071001Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6557e383f060b6561d13f1ed640230a977df2c9741fa0f122532c7c7972d8954

Aliases

arxiv: 1811.02079 · arxiv_version: 1811.02079v1 · doi: 10.48550/arxiv.1811.02079 · pith_short_12: MVL6HA7QMC3F · pith_short_16: MVL6HA7QMC3FMHIT · pith_short_8: MVL6HA7Q

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/MVL6HA7QMC3FMHIT6HWWIARQVF \
  | 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: 6557e383f060b6561d13f1ed640230a977df2c9741fa0f122532c7c7972d8954

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c3c5577b844888d0421ca0e370d32225f21fbc3019607a404c3ebcdad27de954",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2018-11-05T23:07:33Z",
    "title_canon_sha256": "72da57e95f27b2d4c139a3c09cc4bf7187b01d0dc7b80a4452e361d5480d7acc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.02079",
    "kind": "arxiv",
    "version": 1
  }
}