Pith Number

pith:DQDL2G76

pith:2019:DQDL2G766ZPQFJNYWQ6ZAMHF76

not attested not anchored not stored refs pending

Imaging Black Holes and Jets with a VLBI Array Including Multiple Space-Based Telescopes

Kazunori Akiyama, Maura Shea, Vincent L. Fish

arxiv:1903.09539 v1 · 2019-03-22 · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DQDL2G766ZPQFJNYWQ6ZAMHF76}

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

First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole

Receipt and verification

First computed	2026-07-05T00:33:11.489953Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1c06bd1bfef65f02a5b8b43d9030e5ffa80a702a6806cdf4b739f2c2830ed85a

Aliases

arxiv: 1903.09539 · arxiv_version: 1903.09539v1 · doi: 10.48550/arxiv.1903.09539 · pith_short_12: DQDL2G766ZPQ · pith_short_16: DQDL2G766ZPQFJNY · pith_short_8: DQDL2G76

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/DQDL2G766ZPQFJNYWQ6ZAMHF76 \
  | 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: 1c06bd1bfef65f02a5b8b43d9030e5ffa80a702a6806cdf4b739f2c2830ed85a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "402ffdaac99eed7d83f6bdcb642e2fdca20db45b5f539f2109d5df601910bfa8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2019-03-22T14:57:49Z",
    "title_canon_sha256": "9e29909233adf666a9ea4627037e5d23755153d926eeed2e8ab8bded33133069"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.09539",
    "kind": "arxiv",
    "version": 1
  }
}