Pith Number

pith:QNV7C5LT

pith:2012:QNV7C5LTTBI4UBQ5YRKGVPBOGY

not attested not anchored not stored refs pending

Spectral classification of the brightest objects in the galactic star forming region W40

Ka Chun Yu, Marc Kassis, R. Y. Shuping, William D. Vacca

arxiv:1208.4648 v1 · 2012-08-23 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QNV7C5LTTBI4UBQ5YRKGVPBOGY}

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	2026-05-18T01:54:59.297677Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

836bf175739851ca061dc4546abc2e361a8ce4ba836c108d6ff689e7d0c900a2

Aliases

arxiv: 1208.4648 · arxiv_version: 1208.4648v1 · doi: 10.48550/arxiv.1208.4648 · pith_short_12: QNV7C5LTTBI4 · pith_short_16: QNV7C5LTTBI4UBQ5 · pith_short_8: QNV7C5LT

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/QNV7C5LTTBI4UBQ5YRKGVPBOGY \
  | 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: 836bf175739851ca061dc4546abc2e361a8ce4ba836c108d6ff689e7d0c900a2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "43fcd2122484ba70d7a57dfb15384c10c640410794073d8d052b95e286481833",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2012-08-23T00:13:59Z",
    "title_canon_sha256": "d69adcb55486a11faf6603fdd98eb2eb1f00ee4a528a3ca77e57b51edaf26b9c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1208.4648",
    "kind": "arxiv",
    "version": 1
  }
}