Pith Number

pith:MT5PFQ3M

pith:1999:MT5PFQ3MSG7BWLI43XJ66NKHCN

not attested not anchored not stored refs pending

A Hubble Space Telescope Survey for Resolved Companions of Planetary-Nebula Nuclei

(2) Space Telescope Science Institute, 3), (3) Geneva Observatory, 4), (4) University of Calgary, 5) ((1) Pennsylvania State University, (5) Towson University), C.-Y. Zhang (2, Howard E. Bond (2), Karen G. Schaefer (2, Laura K. Fullton (2, Michael S. Sipior (1), Robin Ciardullo (1)

arxiv:astro-ph/9904043 v1 · 1999-04-03 · 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{MT5PFQ3MSG7BWLI43XJ66NKHCN}

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	2026-07-04T15:46:56.771116Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

64faf2c36c91be1b2d1cddd3ef3547135baa1178b8e6554f347b6e179cbc6719

Aliases

arxiv: astro-ph/9904043 · arxiv_version: astro-ph/9904043v1 · doi: 10.48550/arxiv.astro-ph/9904043 · pith_short_12: MT5PFQ3MSG7B · pith_short_16: MT5PFQ3MSG7BWLI4 · pith_short_8: MT5PFQ3M

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/MT5PFQ3MSG7BWLI43XJ66NKHCN \
  | 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: 64faf2c36c91be1b2d1cddd3ef3547135baa1178b8e6554f347b6e179cbc6719

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "11db2e50693a8a0fdc8d4375892bf17c6ebdcca5c53f0fba7a14a21d0fa88fc5",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-04-03T01:01:31Z",
    "title_canon_sha256": "9beb9c4d8345e734a0e9b33ee3c12c107009cca60a36cea9690d5cd012e1b567"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9904043",
    "kind": "arxiv",
    "version": 1
  }
}