Pith Number

pith:7DQUVI5V

pith:2013:7DQUVI5VCEPHHKAQ3EMPNX4BOS

not attested not anchored not stored refs pending

The bow-shock and high-speed jet in the faint, 40 arcmin diameter, outer halo of the evolved Helix planetary nebula (NGC 7293)

(2) Institute of Astronomy, Astrophysics, Greece), John Meaburn (1), National Observatory of Athens, Panos Boumis (2), Remote Sensing, Space Applications, Stavros Akras (2) ((1) Jodrell Bank Centre for Astrophysics, UK, University of Manchester

arxiv:1308.5460 v1 · 2013-08-25 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7DQUVI5VCEPHHKAQ3EMPNX4BOS}

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	2026-05-18T01:47:58.747726Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f8e14aa3b5111e73a810d918f6df8174809056b1dbfbda81c854f44628ea3da0

Aliases

arxiv: 1308.5460 · arxiv_version: 1308.5460v1 · doi: 10.48550/arxiv.1308.5460 · pith_short_12: 7DQUVI5VCEPH · pith_short_16: 7DQUVI5VCEPHHKAQ · pith_short_8: 7DQUVI5V

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/7DQUVI5VCEPHHKAQ3EMPNX4BOS \
  | 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: f8e14aa3b5111e73a810d918f6df8174809056b1dbfbda81c854f44628ea3da0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d79b86742bcd195486b503c0e1f2116da5a93df4f51aa28f788da1c1f0a7121e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2013-08-25T22:42:29Z",
    "title_canon_sha256": "2ed4d894daf411bc0b7a5bd9276c1ca43aa4eeac42431b5bb1db8b16efbd01ce"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1308.5460",
    "kind": "arxiv",
    "version": 1
  }
}