Pith Number

pith:ZGNF4354

pith:2026:ZGNF4354VU3F3PUOWTLXLGH6Z2

not attested not anchored not stored refs resolved

4MOST ChANGES: Catalog of high-redshift quasar candidates (4.5 < $z$ < 7) selected with SED fitting

A. Rojas-Lilay\'u, A. Upadhyayula, C. Mazzucchelli, D. Stern, E. P. Farina, F. E. Bauer, G. Papini, J. A. Acevedo Barroso, L. N. Mart\'inez-Ram\'irez, M. J. Temple, R. J. Assef, S. Belladitta, S. Satheesh-Sheeba, T. Mkrtchyan, V. Toptun

A catalog of 6104 high-redshift quasar candidates at 4.5 < z < 7 is assembled from southern-sky multi-band photometry using SED fitting.

arxiv:2604.13178 v1 · 2026-04-14 · astro-ph.GA

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\usepackage{pith}
\pithnumber{ZGNF4354VU3F3PUOWTLXLGH6Z2}

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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.

Claims

C1strongest claim

Our final catalog contains 6104 high-redshift quasar candidates within 4.5 < z < 7, with detections in 7 or more photometric bands satisfying our SED-based selection criteria (BIC > 0 and F-test > 10). Spectroscopic validation using NTT/EFOSC2 and Palomar/NGPS confirmed 3 high-redshift quasars at z > 5 out of 6 observed candidates.

C2weakest assumption

That the chosen quasar and brown dwarf SED templates, combined with the specific statistical thresholds (BIC > 0, F-test > 10) and minimum band requirement, reliably identify true high-redshift quasars with low contamination from other sources in the photometric data.

C3one line summary

A catalog of 6104 high-redshift quasar candidates (4.5 < z < 7) in the southern hemisphere was produced via multiwavelength photometry and SED fitting, with spectroscopic confirmation of three objects at z > 5.

References

91 extracted · 91 resolved · 1 Pith anchors

[1] Abbott, T. M. C., Abdalla, F. B., Allam, S., et al. 2018, ApJS, 239, 18 2018

[2] 2020, ApJS, 249, 3 2020

[3] F., Homeier, D., et al 2007

[4] J., Stern, D., Noirot, G., et al 2018

[5] E., Lira, P., Anguita, T., et al 2023

Receipt and verification

First computed	2026-06-10T14:10:50.005183Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c99a5e6fbcad365dbe8eb4d77598feceaa28808641326240e66ea13315b6f3c0

Aliases

arxiv: 2604.13178 · arxiv_version: 2604.13178v1 · doi: 10.48550/arxiv.2604.13178 · pith_short_12: ZGNF4354VU3F · pith_short_16: ZGNF4354VU3F3PUO · pith_short_8: ZGNF4354

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/ZGNF4354VU3F3PUOWTLXLGH6Z2 \
  | 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: c99a5e6fbcad365dbe8eb4d77598feceaa28808641326240e66ea13315b6f3c0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dd444f3e05c03ff90d1328016470247d4efcbf5a6a13637b747ea1d1717a4751",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2026-04-14T18:01:33Z",
    "title_canon_sha256": "7ef8b7f7c7db318e933e8eccca30fe9f3beef2b5f0999ae752107b7594f5cfb3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.13178",
    "kind": "arxiv",
    "version": 1
  }
}