Pith Number

pith:GKZUP7H2

pith:2012:GKZUP7H2OS5I3NCQ3T73VLMRNG

not attested not anchored not stored refs pending

HST/COS Observations of Thirteen New He II Quasars

Avery Meiksin, David Syphers, Donald G. York, Donald P. Schneider, Scott F. Anderson, Wei Zheng

arxiv:1202.0236 v1 · 2012-02-01 · 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{GKZUP7H2OS5I3NCQ3T73VLMRNG}

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	2026-05-18T01:58:36.762532Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

32b347fcfa74ba8db450dcffbaad91699d74597e34d31f0a37bc0fa7d3bcd894

Aliases

arxiv: 1202.0236 · arxiv_version: 1202.0236v1 · doi: 10.48550/arxiv.1202.0236 · pith_short_12: GKZUP7H2OS5I · pith_short_16: GKZUP7H2OS5I3NCQ · pith_short_8: GKZUP7H2

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/GKZUP7H2OS5I3NCQ3T73VLMRNG \
  | 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: 32b347fcfa74ba8db450dcffbaad91699d74597e34d31f0a37bc0fa7d3bcd894

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ad66425af2dd51d23cd45ce2035efb972a9ff684d429f3f090005cc4bad1cc58",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-02-01T18:04:51Z",
    "title_canon_sha256": "fd9f2897c159355bc9dc6e203a3514e0060bc152969ecde4fb118bb6f98a64d4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1202.0236",
    "kind": "arxiv",
    "version": 1
  }
}