Pith Number

pith:2L3CUXQD

pith:2003:2L3CUXQDVBT4FY3LBCQBTX5JJM

not attested not anchored not stored refs pending

Hubble Space Telescope Observations of NGC 6240: a Case Study of an Ultra-Luminous Infrared Galaxy with Obscured Activity

David Axon (RIT), J. Christopher Mihos (CWRU), Joris Gerssen, Joshua E. Barnes (U Hawaii), Lars Hernquist (CfA), Roeland P. van der Marel (STScI)

arxiv:astro-ph/0310029 v1 · 2003-10-01 · 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{2L3CUXQDVBT4FY3LBCQBTX5JJM}

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	2026-07-04T16:37:28.123890Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d2f62a5e03a867c2e36b08a019dfa94b36a62fae3fb7fc3525acabc21acb4c4a

Aliases

arxiv: astro-ph/0310029 · arxiv_version: astro-ph/0310029v1 · doi: 10.48550/arxiv.astro-ph/0310029 · pith_short_12: 2L3CUXQDVBT4 · pith_short_16: 2L3CUXQDVBT4FY3L · pith_short_8: 2L3CUXQD

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/2L3CUXQDVBT4FY3LBCQBTX5JJM \
  | 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: d2f62a5e03a867c2e36b08a019dfa94b36a62fae3fb7fc3525acabc21acb4c4a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8f5f603b2655a8ca45a2169eec1bb0f13aa40066ee84636e2911832d9cde25ec",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-10-01T14:50:23Z",
    "title_canon_sha256": "e80f1cbb7709acfc39a01b46d94c480b7be1761b9929e2102c492125f8bcd896"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0310029",
    "kind": "arxiv",
    "version": 1
  }
}