Pith Number

pith:MTHOCNBU

pith:1999:MTHOCNBUFEEPW6FKTG5TR65B5V

not attested not anchored not stored refs pending

Two new quasars at z=1.90 and z=0.15 from the Calan-Tololo Survey

(2) ESO, Chile), Chile (3) Departamento de Astronmia, C. Tappert (1), Germany, J. Maza (3) ((1) Astronomisches Institut der Ruhr-Universitaet Bochum, J. Rossa (1), Santiago, Th. Augusteijn (2), Universidad de Chile

arxiv:astro-ph/9907357 v1 · 1999-07-26 · 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{MTHOCNBUFEEPW6FKTG5TR65B5V}

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	2026-05-18T04:21:32.128264Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

64cee134342908fb78aa99bb38fba1ed5a4f89fcf0c0b778f4d96f3d32e8ed26

Aliases

arxiv: astro-ph/9907357 · arxiv_version: astro-ph/9907357v1 · doi: 10.48550/arxiv.astro-ph/9907357 · pith_short_12: MTHOCNBUFEEP · pith_short_16: MTHOCNBUFEEPW6FK · pith_short_8: MTHOCNBU

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/MTHOCNBUFEEPW6FKTG5TR65B5V \
  | 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: 64cee134342908fb78aa99bb38fba1ed5a4f89fcf0c0b778f4d96f3d32e8ed26

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "df6f7a9a1d21da142674ff692acb299f898b591c4f283b118c1e583b46d9cd09",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-07-26T16:24:23Z",
    "title_canon_sha256": "138c8880b76eb84d702da813228650aef954430278e96eeb3c17a163200d805b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9907357",
    "kind": "arxiv",
    "version": 1
  }
}