Pith Number

pith:T37UTK3F

pith:2007:T37UTK3FBTRXGGU5I5A6TXEBNZ

not attested not anchored not stored refs pending

Starbursts in the Local Universe: new HST/ACS observations of the irregular galaxy NGC 4449

A. Aloisi (STScI/ESA), C. Leitherer (STScI), F. Annibali (STScI), J. Mack (STScI), L. Angeretti (INAF-Oab), M. Sirianni (STScI/ESA), M. Tosi (INAF-OAB), R.P. van der Marel (STScI)

arxiv:0708.0852 v2 · 2007-08-06 · 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{T37UTK3FBTRXGGU5I5A6TXEBNZ}

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	2026-05-18T00:47:53.941028Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9eff49ab650ce3731a9d4741e9dc816e7f019f75fdbad6ff8d63175de870e9e3

Aliases

arxiv: 0708.0852 · arxiv_version: 0708.0852v2 · doi: 10.48550/arxiv.0708.0852 · pith_short_12: T37UTK3FBTRX · pith_short_16: T37UTK3FBTRXGGU5 · pith_short_8: T37UTK3F

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/T37UTK3FBTRXGGU5I5A6TXEBNZ \
  | 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: 9eff49ab650ce3731a9d4741e9dc816e7f019f75fdbad6ff8d63175de870e9e3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e035fc990dc1c88fe753e82693b7cb5671568a8526d77ab6177e3009dc1965c3",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-08-06T22:51:31Z",
    "title_canon_sha256": "d86647963a7efd22fd1e585bc64de93053b929c661441c4be749ab25a62b0774"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0708.0852",
    "kind": "arxiv",
    "version": 2
  }
}