Pith Number

pith:BW4YY34G

pith:2009:BW4YY34GKCJF2VZFBTZLOROSUM

not attested not anchored not stored refs pending

SBS 0335-052E+W: deep VLT/FORS+UVES spectroscopy of the pair of the lowest-metallicity blue compact dwarf galaxies

2), (2) Max-Planck-Institute for Radioastronomy, (3) Institute for astrophysics, (4) Instituto de Astrofisica de Andalucia, 5) ((1) Main Astronomical Observatory, (5) Department of Astronomy, Bonn, Germany, Granada, K.J. Fricke (3, Kyiv, N.G. Guseva (1, P. Papaderos (4, Space Physics, Spain, Sweden), Ukraine, University of Goettingen, Uppsala University, Y.I. Izotov (1

arxiv:0907.2116 v1 · 2009-07-13 · astro-ph.CO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BW4YY34GKCJF2VZFBTZLOROSUM}

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	2026-05-18T00:14:48.055983Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0db98c6f8650925d57250cf2b745d2a31c7d189f9a3045533c379e8368a93b0e

Aliases

arxiv: 0907.2116 · arxiv_version: 0907.2116v1 · doi: 10.48550/arxiv.0907.2116 · pith_short_12: BW4YY34GKCJF · pith_short_16: BW4YY34GKCJF2VZF · pith_short_8: BW4YY34G

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/BW4YY34GKCJF2VZFBTZLOROSUM \
  | 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: 0db98c6f8650925d57250cf2b745d2a31c7d189f9a3045533c379e8368a93b0e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "31d4c2a5615e3fec1757dacf288ce06d23066523a9bb084643e9b5546ba491e4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-07-13T09:16:15Z",
    "title_canon_sha256": "a7609c1bcea3c3c778f1061637b1b30b9f9196a95416d972b49dd95bc4fd093d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.2116",
    "kind": "arxiv",
    "version": 1
  }
}