Pith Number

pith:6E2PDNRW

pith:1996:6E2PDNRWKUP3MSCNMCLVSPSDPT

not attested not anchored not stored refs pending

Measuring the Atmospheric Influence on Differential Astrometry: a Simple Method Applied to Wide Field CCD Frames

N. Zacharias (USRA/USNO, USA), Washington DC

arxiv:astro-ph/9609143 v1 · 1996-09-20 · 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{6E2PDNRWKUP3MSCNMCLVSPSDPT}

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	2026-05-18T01:07:40.781364Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f134f1b636551fb6484d6097593e437cd6e3a0440daea4c8cc86129d0c9c4748

Aliases

arxiv: astro-ph/9609143 · arxiv_version: astro-ph/9609143v1 · doi: 10.48550/arxiv.astro-ph/9609143 · pith_short_12: 6E2PDNRWKUP3 · pith_short_16: 6E2PDNRWKUP3MSCN · pith_short_8: 6E2PDNRW

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/6E2PDNRWKUP3MSCNMCLVSPSDPT \
  | 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: f134f1b636551fb6484d6097593e437cd6e3a0440daea4c8cc86129d0c9c4748

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b057e9e5e94eb39cb032db13bada64205edcdb89cbb6e0f407acd29818c1ff1d",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1996-09-20T12:15:24Z",
    "title_canon_sha256": "bad9b108eddd026d05574b331d90bf787351eb2dc03342785c7948fc7b1d27dd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9609143",
    "kind": "arxiv",
    "version": 1
  }
}