Pith Number

pith:EIFCKOBE

pith:2013:EIFCKOBE4Z6KEM7QDLXSRTLUIQ

not attested not anchored not stored refs pending

Night sky photometry and spectroscopy performed at the Vienna University Observatory

Johannes Puschnig, Stefan Uttenthaler, Thomas Posch

arxiv:1304.7716 v1 · 2013-04-29 · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EIFCKOBE4Z6KEM7QDLXSRTLUIQ}

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	2026-05-18T01:50:14.615298Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

220a253824e67ca233f01aef28cd74442414c8b061f5452ba568dd358496830d

Aliases

arxiv: 1304.7716 · arxiv_version: 1304.7716v1 · doi: 10.48550/arxiv.1304.7716 · pith_short_12: EIFCKOBE4Z6K · pith_short_16: EIFCKOBE4Z6KEM7Q · pith_short_8: EIFCKOBE

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/EIFCKOBE4Z6KEM7QDLXSRTLUIQ \
  | 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: 220a253824e67ca233f01aef28cd74442414c8b061f5452ba568dd358496830d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8c385f7731fb4b3cb2a37bff98d343ac5b48c33ab488cfb7eb3d230be191fbd2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2013-04-29T17:24:47Z",
    "title_canon_sha256": "ab1528c2f3e4715b7669bac60ef0699b321287e6eeaf959111a3b167e7ba0832"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.7716",
    "kind": "arxiv",
    "version": 1
  }
}