Pith Number

pith:IKCS3K4Q

pith:2015:IKCS3K4QK6SAQLBU4RYW4P57I7

not attested not anchored not stored refs pending

Re-examining the case for neutral gas near the redshift 7 quasar ULAS J1120+0641

George D. Becker, Sarah E. I. Bosman

arxiv:1505.06880 v2 · 2015-05-26 · astro-ph.CO · 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{IKCS3K4QK6SAQLBU4RYW4P57I7}

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	2026-05-18T01:36:47.789074Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

42852dab9057a4082c34e4716e3fbf47f24c3448b4c8b194ffee86105f3800b0

Aliases

arxiv: 1505.06880 · arxiv_version: 1505.06880v2 · doi: 10.48550/arxiv.1505.06880 · pith_short_12: IKCS3K4QK6SA · pith_short_16: IKCS3K4QK6SAQLBU · pith_short_8: IKCS3K4Q

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/IKCS3K4QK6SAQLBU4RYW4P57I7 \
  | 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: 42852dab9057a4082c34e4716e3fbf47f24c3448b4c8b194ffee86105f3800b0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2521fde3629c8d16e678a7cd14844e9ff9c17604c4c5b2d0444e85f1dff3ace6",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2015-05-26T10:09:09Z",
    "title_canon_sha256": "719be55bf0af58d519ff2f6b9dded0a472898b15e3f836633a0d660eb7468887"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1505.06880",
    "kind": "arxiv",
    "version": 2
  }
}