Pith Number

pith:F3CP4CI4

pith:2012:F3CP4CI4OR7PNISGMSZEXJQWJH

not attested not anchored not stored refs pending

The History and Environment of a Faded Quasar: Hubble Space Telescope observations of Hanny's Voorwerp and IC 2497

Anna Manning, Chris J. Lintott, Daniel Thomas, Hanny van Arkel, Kevin Schawinski, S. Drew Chojnowski, Stuart Lynn, Vardha N. Bennert, William C. Keel

arxiv:1206.3797 v1 · 2012-06-17 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{F3CP4CI4OR7PNISGMSZEXJQWJH}

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	2026-05-18T01:56:52.019868Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2ec4fe091c747ef6a24664b24ba61649e433f3770dd23414e679f3a16226d5ce

Aliases

arxiv: 1206.3797 · arxiv_version: 1206.3797v1 · doi: 10.48550/arxiv.1206.3797 · pith_short_12: F3CP4CI4OR7P · pith_short_16: F3CP4CI4OR7PNISG · pith_short_8: F3CP4CI4

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/F3CP4CI4OR7PNISGMSZEXJQWJH \
  | 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: 2ec4fe091c747ef6a24664b24ba61649e433f3770dd23414e679f3a16226d5ce

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "454d8881b38c2b52a4faaf8d57e4347543ccf0a068de71e866c1cb97ac5de261",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-06-17T21:33:20Z",
    "title_canon_sha256": "da383bc325736cef495b4a003e8b256588aefe402d4f8d6a8011369999da1755"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1206.3797",
    "kind": "arxiv",
    "version": 1
  }
}