Pith Number

pith:OLBZ6ZUP

pith:1996:OLBZ6ZUPH57SEA7E53UAVOQJ6H

not attested not anchored not stored refs pending

X-ray QSO evolution from a very deep ROSAT survey

2), (2) Southampton University, (3) MSSL, (4) IoA Cambridge, (5) University of Oxford, (6) Imperial College, (7) University of Hawaii), A.M. Newsam (2), G. Branduardi-Raymont (3), G. Dalton (5), G. Luppino (7) ((1) NASA/GSFC, I.M. McHardy (2), K.O. Mason (3), L.R. Jones (1, M.R. Merrifield (2), M. Rowan-Robinson (6), P.J. Smith (3), R.G. Abraham (4)

arxiv:astro-ph/9610124 v1 · 1996-10-16 · 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{OLBZ6ZUPH57SEA7E53UAVOQJ6H}

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	2026-05-18T01:40:19.085410Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

72c39f668f3f7f2203e4eee80aba09f1fed15fe91ec43755cc338f6fc314639f

Aliases

arxiv: astro-ph/9610124 · arxiv_version: astro-ph/9610124v1 · doi: 10.48550/arxiv.astro-ph/9610124 · pith_short_12: OLBZ6ZUPH57S · pith_short_16: OLBZ6ZUPH57SEA7E · pith_short_8: OLBZ6ZUP

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/OLBZ6ZUPH57SEA7E53UAVOQJ6H \
  | 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: 72c39f668f3f7f2203e4eee80aba09f1fed15fe91ec43755cc338f6fc314639f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8960dd9b0aeb64d8858dfaa689b7a550bb2806483fc295ddd8262a6731adcaab",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1996-10-16T16:34:42Z",
    "title_canon_sha256": "fda9eeff80e4d93efc6db0dfce3d87fd32f54b05f8fa89b51b7140d40da07f01"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9610124",
    "kind": "arxiv",
    "version": 1
  }
}