Pith Number

pith:WL6AYQLD

pith:2021:WL6AYQLDYF5HCZLVR7OTPGGIUW

not attested not anchored not stored refs pending

Discovery and origins of giant optical nebulae surrounding quasar PKS 0454-22

Hsiao-Wen Chen, Jakob M. Helton, Jenny E. Greene, Sean D. Johnson

arxiv:2106.03858 v1 · 2021-06-07 · 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{WL6AYQLDYF5HCZLVR7OTPGGIUW}

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	2026-07-05T10:16:57.065986Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b2fc0c4163c17a7165758fdd3798c8a5a264ff8483ec05185f7337bb7bae0647

Aliases

arxiv: 2106.03858 · arxiv_version: 2106.03858v1 · doi: 10.48550/arxiv.2106.03858 · pith_short_12: WL6AYQLDYF5H · pith_short_16: WL6AYQLDYF5HCZLV · pith_short_8: WL6AYQLD

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/WL6AYQLDYF5HCZLVR7OTPGGIUW \
  | 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: b2fc0c4163c17a7165758fdd3798c8a5a264ff8483ec05185f7337bb7bae0647

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6a1d9247e293c99b440540bf3b7052bf724d1b1809b5ee8044110d8bc24119a0",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2021-06-07T18:00:00Z",
    "title_canon_sha256": "08fe975527ecbc46c28c1d2440e4dc6900c4e00963656f7fc06c0c76f2f3abf7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2106.03858",
    "kind": "arxiv",
    "version": 1
  }
}