Pith Number

pith:CBH6TGI2

pith:2001:CBH6TGI25EC6WLCTXVF6OF56Q2

not attested not anchored not stored refs pending

A spectroscopic study of component C and the extended emission around I Zw 18

(2) W. M. Keck Observatory, (3) MMT Observatory, (4) University of Virginia, (5) National Optical Astronomy Observatories, (6) Universit\"ats--Sternwarte, C. B. Foltz (3), F. H. Chaffee (2), Germany), G\"ottingen, K. J. Fricke (6), Kyiv, N. G. Guseva (1) ((1) Main Astronomical Observatory, P. Papaderos (6), R. F. Green (5), T. X. Thuan (4), Ukraine, University of Arizona, USA, Y. I. Izotov (1)

arxiv:astro-ph/0109257 v1 · 2001-09-17 · 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{CBH6TGI25EC6WLCTXVF6OF56Q2}

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	2026-05-18T02:40:35.965247Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

104fe9991ae905eb2c53bd4be717be86b25cd4da7ced60bb0ec9c27ce937c56d

Aliases

arxiv: astro-ph/0109257 · arxiv_version: astro-ph/0109257v1 · doi: 10.48550/arxiv.astro-ph/0109257 · pith_short_12: CBH6TGI25EC6 · pith_short_16: CBH6TGI25EC6WLCT · pith_short_8: CBH6TGI2

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/CBH6TGI25EC6WLCTXVF6OF56Q2 \
  | 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: 104fe9991ae905eb2c53bd4be717be86b25cd4da7ced60bb0ec9c27ce937c56d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2189835d7b1b5475347256ab6ac73cca654b414bac2532911fb4a25b4abedfd1",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-09-17T09:50:56Z",
    "title_canon_sha256": "b5ceae94945136a6dddda634ff8bf9257799d5d96ba0a9e01056eb3b567e9687"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0109257",
    "kind": "arxiv",
    "version": 1
  }
}