Pith Number

pith:DJO2MT3E

pith:2009:DJO2MT3EK6VQIKR3NRTOOCTHSV

not attested not anchored not stored refs pending

The Quasar SDSS J1536+0441: An Unusual Double-Peaked Emitter

A. J. Mendez (3), A. M. Wolfe (3); ((1) UC Berkeley; (2) JPL; (3) UCSD/CASS), A. V. Filippenko (1), J. M. Silverman (1), J.S. Bloom (1), K. J. Lawrence (2), M. D. Hicks (2), M. Rafelski (3), Ryan Chornock (1), S. B. Cenko (1)

arxiv:0906.0849 v2 · 2009-06-04 · astro-ph.CO · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DJO2MT3EK6VQIKR3NRTOOCTHSV}

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	2026-05-18T02:13:29.134160Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1a5da64f6457ab042a3b6c66e70a679570b94ff07e7d805c5d6b327f7c917884

Aliases

arxiv: 0906.0849 · arxiv_version: 0906.0849v2 · doi: 10.48550/arxiv.0906.0849 · pith_short_12: DJO2MT3EK6VQ · pith_short_16: DJO2MT3EK6VQIKR3 · pith_short_8: DJO2MT3E

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/DJO2MT3EK6VQIKR3NRTOOCTHSV \
  | 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: 1a5da64f6457ab042a3b6c66e70a679570b94ff07e7d805c5d6b327f7c917884

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cdecbf2c6dd3e31bc6643c230263b5167a0e8dd8ebc2aa3076b89b66536a6dae",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-06-04T17:59:38Z",
    "title_canon_sha256": "4f0d0423a4dfddf0c035f26b6abb5ab62ab73b297cdf9ec19cff957d9bfc8a9a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0906.0849",
    "kind": "arxiv",
    "version": 2
  }
}