Pith Number

pith:BCJ4FBUN

pith:2005:BCJ4FBUN5MHWA5SKYKZAX5XJB2

not attested not anchored not stored refs pending

GALEX UV observations of the interacting galaxy NGC 4438 in the Virgo cluster

A. Boselli, A. Gil de Paz, A. S. Szalay, B. F. Madore, B. Milliard, B. Welsh, D. C. Martin, D. Schiminovich, J. Donas, J. Iglesias-Paramo, K. Forster, L. Bianchi, L. Cortese, M. Seibert, O. Siegmund, P. G. Friedman, P. Jelinsky, P. Morrissey, R. Malina, R. M. Rich, S. Boissier, S. Neff, T. Barlow, T. K. Wyder, T. M. Heckman, T. Small, V. Buat, Y.-I. Byun, Y.-W. Lee

arxiv:astro-ph/0502040 v1 · 2005-02-02 · 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{BCJ4FBUN5MHWA5SKYKZAX5XJB2}

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	2026-07-04T16:50:45.261792Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0893c2868deb0f60764ac2b20bf6e90e83fdcabb3380a6202ed274f23a7d660c

Aliases

arxiv: astro-ph/0502040 · arxiv_version: astro-ph/0502040v1 · doi: 10.48550/arxiv.astro-ph/0502040 · pith_short_12: BCJ4FBUN5MHW · pith_short_16: BCJ4FBUN5MHWA5SK · pith_short_8: BCJ4FBUN

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/BCJ4FBUN5MHWA5SKYKZAX5XJB2 \
  | 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: 0893c2868deb0f60764ac2b20bf6e90e83fdcabb3380a6202ed274f23a7d660c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ce075fd28a73a58c99c5847ca8510c9ee4c05c12a7ecc63ad96aac3686c03284",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-02-02T15:10:11Z",
    "title_canon_sha256": "c936a61bac22794409f540a46cdd46d941fe895856295343a4487f299984fd2d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0502040",
    "kind": "arxiv",
    "version": 1
  }
}