Pith Number

pith:XDUIOQPD

pith:2009:XDUIOQPDL5USL7W4K6CSQFI5HL

not attested not anchored not stored refs pending

HI in very metal-poor galaxies: the SBS 0335-052 system

B. Ekta, Jayaram N. Chengalur, Simon A. Pustilnik

arxiv:0904.4797 v1 · 2009-04-30 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XDUIOQPDL5USL7W4K6CSQFI5HL}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T02:13:48.856147Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b8e88741e35f6925fedc578528151d3ad9020d0b55537c6417793da282b37e56

Aliases

arxiv: 0904.4797 · arxiv_version: 0904.4797v1 · doi: 10.48550/arxiv.0904.4797 · pith_short_12: XDUIOQPDL5US · pith_short_16: XDUIOQPDL5USL7W4 · pith_short_8: XDUIOQPD

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/XDUIOQPDL5USL7W4K6CSQFI5HL \
  | 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: b8e88741e35f6925fedc578528151d3ad9020d0b55537c6417793da282b37e56

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d632c51cdf7b9b287f4038c3f139e4ea5a02cdcf6a4272b582b4fd4101f8275e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-04-30T11:45:41Z",
    "title_canon_sha256": "009910226ee5fa9421914f6deba96c12b73d8df4bf42d2a51c324add739a69f7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.4797",
    "kind": "arxiv",
    "version": 1
  }
}