Pith Number

pith:PGCJBUQO

pith:2009:PGCJBUQO2VLWQTL75UL74AAJXE

not attested not anchored not stored refs pending

Fossil Galaxy Groups -- Ideal Laboratories for Studying the Effects of AGN Heating

Chandreyee Sengupta (NCRA-TIFR), Habib Khosroshahi (School of Astronomy, Institute for Research in Fundamental Sciences (IPM)), Martin Hardcastle (University of Hertfordshire, Nazirah N. Jetha (UAH), Somak Raychaudhury (University of Birmingham, UK)

arxiv:0909.0221 v1 · 2009-09-01 · 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{PGCJBUQO2VLWQTL75UL74AAJXE}

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	2026-05-18T02:12:12.029137Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

798490d20ed557684d7fed17fe0009b9064cf9e84798cbdd9dc9a784f04289ef

Aliases

arxiv: 0909.0221 · arxiv_version: 0909.0221v1 · doi: 10.48550/arxiv.0909.0221 · pith_short_12: PGCJBUQO2VLW · pith_short_16: PGCJBUQO2VLWQTL7 · pith_short_8: PGCJBUQO

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/PGCJBUQO2VLWQTL75UL74AAJXE \
  | 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: 798490d20ed557684d7fed17fe0009b9064cf9e84798cbdd9dc9a784f04289ef

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a5bc980acae63a972172233cf854f3275f0a9710083a25129b38cf01c52f300a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-09-01T18:09:41Z",
    "title_canon_sha256": "b42cfd6024af1a8baa0fae5f3febd107f17a5dfff55fb23a97bba3a0d2c3a451"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.0221",
    "kind": "arxiv",
    "version": 1
  }
}