Pith Number

pith:NYHVPD7O

pith:2004:NYHVPD7OX55JAYPOPTHOVPA2F6

not attested not anchored not stored refs pending

XMM-Newton observations of the late-stage merger-remnant galaxies NGC 3921 and NGC 7252

(2) University of Leicester, (3) Carnegie Observatories, A. M. Read (2), Francois Schweizer (3) ((1) University of Birmingham, L. A. Nolan (1), Pasadena), T. J. Ponman (1)

arxiv:astro-ph/0405557 v1 · 2004-05-27 · 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{NYHVPD7OX55JAYPOPTHOVPA2F6}

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	2026-07-04T16:43:51.613787Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6e0f578feebf7a9061ee7cceeabc1a2f851ad9285f59ba8f48d668f23ad24550

Aliases

arxiv: astro-ph/0405557 · arxiv_version: astro-ph/0405557v1 · doi: 10.48550/arxiv.astro-ph/0405557 · pith_short_12: NYHVPD7OX55J · pith_short_16: NYHVPD7OX55JAYPO · pith_short_8: NYHVPD7O

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/NYHVPD7OX55JAYPOPTHOVPA2F6 \
  | 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: 6e0f578feebf7a9061ee7cceeabc1a2f851ad9285f59ba8f48d668f23ad24550

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "515e2089c4cdbd72cdc832ef7c2da549dfb73463342b403a6b54aa6608a63ea6",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-05-27T18:00:12Z",
    "title_canon_sha256": "53c585e54514629381312d36e414aac83c21d0e28813dbc2c1e60826a8dcf5de"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0405557",
    "kind": "arxiv",
    "version": 1
  }
}