Pith Number

pith:BGTP4SRW

pith:1998:BGTP4SRWQEAL2MUGERG4G4YFZY

not attested not anchored not stored refs pending

Early-Type Galaxies in the Hubble Deep Field: The Star Formation History

A. Bressan, A. Franceschini, G. Fasano, G.L. Granato, L. Danese, L. Silva, S. Arnouts

arxiv:astro-ph/9806077 v1 · 1998-06-04 · 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{BGTP4SRWQEAL2MUGERG4G4YFZY}

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	2026-07-04T16:06:44.313503Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

09a6fe4a368100bd3286244dc37305ce1997f9aebdaedcc0f450a574683e2164

Aliases

arxiv: astro-ph/9806077 · arxiv_version: astro-ph/9806077v1 · doi: 10.48550/arxiv.astro-ph/9806077 · pith_short_12: BGTP4SRWQEAL · pith_short_16: BGTP4SRWQEAL2MUG · pith_short_8: BGTP4SRW

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/BGTP4SRWQEAL2MUGERG4G4YFZY \
  | 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: 09a6fe4a368100bd3286244dc37305ce1997f9aebdaedcc0f450a574683e2164

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d0e5971c05db634dd49461fc3636f277aafdab847499c5fabd8ce2e745d1889f",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1998-06-04T16:11:51Z",
    "title_canon_sha256": "8250fe9091134e13d30533a830816a6b0cd732c2055a867e59959042ddf2bad0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9806077",
    "kind": "arxiv",
    "version": 1
  }
}