Pith Number

pith:T2RWUOHA

pith:2009:T2RWUOHAPRIF7WHW4I5ZMF2HRZ

not attested not anchored not stored refs pending

Ten More New Sightlines for the Study of Intergalactic Helium, and Hundreds of Far-UV-Bright Quasars, from SDSS, GALEX, and HST

(2) Johns Hopkins, (3) Univ. of Edinburgh, (4) Pennsylvania State Univ., (5) Univ. of Chicago, 6) ((1) Univ. of Washington, (6) Enrico Fermi Institute), Avery Meiksin (3), Daryl Haggard (1), David Syphers (1), Donald G. York (5, Donald P. Schneider (4), Scott F. Anderson (1), Wei Zheng (2)

arxiv:0909.3962 v1 · 2009-09-22 · astro-ph.CO

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

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	2026-05-18T02:34:28.227456Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9ea36a38e07c505fd8f6e23b9617478e581b67a6e25cfa01fded2cbbe96a0448

Aliases

arxiv: 0909.3962 · arxiv_version: 0909.3962v1 · doi: 10.48550/arxiv.0909.3962 · pith_short_12: T2RWUOHAPRIF · pith_short_16: T2RWUOHAPRIF7WHW · pith_short_8: T2RWUOHA

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/T2RWUOHAPRIF7WHW4I5ZMF2HRZ \
  | 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: 9ea36a38e07c505fd8f6e23b9617478e581b67a6e25cfa01fded2cbbe96a0448

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "eb79bf0cd5ef4e746dd6da4bf1bc6817d468359fc6886a15457dc312ead816e3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-09-22T18:17:20Z",
    "title_canon_sha256": "02f292c31b99e981c8b61bf02a30c44ec0daa4b88065f31150d5f67293bb0b03"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.3962",
    "kind": "arxiv",
    "version": 1
  }
}