Pith Number

pith:4BDA237Y

pith:2004:4BDA237Y24ZW5KMMNF4UKQDQZR

not attested not anchored not stored refs pending

Evidence for a Cosmological Stromgren Surface and for Significant Neutral Hydrogen Surrounding the Quasar SDSS J1030+0524

Andrei Mesinger, Zoltan Haiman (Columbia University)

arxiv:astro-ph/0406188 v2 · 2004-06-07 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4BDA237Y24ZW5KMMNF4UKQDQZR}

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	2026-07-04T16:43:57.403613Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e0460d6ff8d7336ea98c6979454070cc694e897ccb3dfadf37b1ad5c2f352d8e

Aliases

arxiv: astro-ph/0406188 · arxiv_version: astro-ph/0406188v2 · doi: 10.48550/arxiv.astro-ph/0406188 · pith_short_12: 4BDA237Y24ZW · pith_short_16: 4BDA237Y24ZW5KMM · pith_short_8: 4BDA237Y

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/4BDA237Y24ZW5KMMNF4UKQDQZR \
  | 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: e0460d6ff8d7336ea98c6979454070cc694e897ccb3dfadf37b1ad5c2f352d8e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c4c43ad51f88180af792044f8dfb769c5d74ee9012001c0442b1509982dfb413",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-06-07T20:09:16Z",
    "title_canon_sha256": "e3f601a269aa2da805ddeb745b0ebeef9825b6acb2ef7004f321b0ff23f2e1d4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0406188",
    "kind": "arxiv",
    "version": 2
  }
}