Pith Number

pith:BLEHOZOY

pith:2008:BLEHOZOYE4SH4TDT7VP6VLNDED

not attested not anchored not stored refs pending

Measuring the undetectable: Proper motions and parallaxes of very faint sources

David W. Hogg (NYU, Dustin Lang (Toronto), Hans-Walter Rix (MPIA), MPIA), Sebastian Jester (MPIA)

arxiv:0808.4004 v2 · 2008-08-28 · 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{BLEHOZOYE4SH4TDT7VP6VLNDED}

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	2026-05-18T02:35:15.045723Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0ac87765d827247e4c73fd5feaada320c419f8d2a3bb78ef201ae3d8a0e9f089

Aliases

arxiv: 0808.4004 · arxiv_version: 0808.4004v2 · doi: 10.48550/arxiv.0808.4004 · pith_short_12: BLEHOZOYE4SH · pith_short_16: BLEHOZOYE4SH4TDT · pith_short_8: BLEHOZOY

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/BLEHOZOYE4SH4TDT7VP6VLNDED \
  | 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: 0ac87765d827247e4c73fd5feaada320c419f8d2a3bb78ef201ae3d8a0e9f089

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "321bcc1a20bbaf314d92d9d2cd8c4238b737939bb2492ee2d0eebd8ad37d62f6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-08-28T22:06:54Z",
    "title_canon_sha256": "25d46ec515b70adaf7a5b7829712af572dbe9b3f0c4db3fa062ebdcb7a1bcb7f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0808.4004",
    "kind": "arxiv",
    "version": 2
  }
}