Pith Number

pith:M6VZBIDE

pith:2009:M6VZBIDEUJHQBWUUWUOPNMRGVV

not attested not anchored not stored refs pending

The first accurate parallax distance to a black hole

(2) SRON, 3), (3) CfA, (4) Nijmegen, (5) MIT), E. Gallo (5) ((1) NRAO, G. Nelemans (4), J. C. A. Miller-Jones (1), M. P. Rupen (1), P. G. Jonker (2, V. Dhawan (1), W. Brisken (1)

arxiv:0910.5253 v1 · 2009-10-27 · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{M6VZBIDEUJHQBWUUWUOPNMRGVV}

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

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	2026-05-18T02:34:12.680917Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

67ab90a064a24f00da94b51cf6b226ad6e6b716c391c526fd371fd815f5ee116

Aliases

arxiv: 0910.5253 · arxiv_version: 0910.5253v1 · doi: 10.48550/arxiv.0910.5253 · pith_short_12: M6VZBIDEUJHQ · pith_short_16: M6VZBIDEUJHQBWUU · pith_short_8: M6VZBIDE

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/M6VZBIDEUJHQBWUUWUOPNMRGVV \
  | 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: 67ab90a064a24f00da94b51cf6b226ad6e6b716c391c526fd371fd815f5ee116

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "057d9474d88332d692b9aa5dc8fb2bc9c9870c3d2b99c44aca3cf4861c6941ee",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-10-27T21:57:43Z",
    "title_canon_sha256": "f2809220d1a84a21812ba5b2dfbd78065586aca1a97353a9d5f4d647d0767885"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0910.5253",
    "kind": "arxiv",
    "version": 1
  }
}