LRD Watch DR1 · catalog object
LRDW J141910.88+524719.8
Images
3.2″ across, north up, east left, resampled from the deepest mosaic covering the object in each band; ticks mark the catalogue position. Each band is stretched on its own noise; the composite shares one flux scale, so its colour is real. No coverage in F090W, F277W.
Spectral energy distribution
- NIRCam wide
- NIRCam medium
- 2σ upper limit (S/N < 2)
At a glance
- Tier
- SILVER main class
- Found by
- BH* channel
- Redshift
- 5.285 DJA grade 3, PRISM
- Spectral shape
- inconclusive de Graaff+25 criteria
- F444W
- 23.69 AB S/N 291, 0.16″ aperture
- F277W − F444W
- not in the colour lane
- BH* share
- 0.85 bhs_bb4200_b4; Δχ² galaxy 21.4, dwarf −18.4
- Compactness
- growth ratio 1.718 stars 2.285
- Balmer break
- not measured
- Image vetting
- half-stack pass; no flags raised
- Literature
- 6 catalogue(s), 7 AGN paper(s) within 0.024″
Vetting
- Image vettingpassed
- Half-stack testpass
- Artifact risknone
- Neighbournone
- Extendedno
- BH* channeldwarf grid fits better (dchi2_bd=-18.4) but z_spec confirms
Redshifts
Each redshift keeps its own column. Photometric redshifts of little red dots are unreliable: against spectra, about a third of AGN-template redshifts (z_agn; 31 of 95 in the last purity run) and about half of galaxy-template redshifts at z > 3 were catastrophic outliers (methods Section 8).
| Column | What it is | z | Source |
|---|---|---|---|
z_spec | Spectroscopic, DJA grade 3 | 5.2845 | rubies-egs53-v4_prism-clear_4233_42046.spec.fits |
z_vet | Adopted by vetting | 5.2845 | zspec:dja_specz_grade3.csv:42046 |
z_phot | Photometric (P(z) peak) | 5.234 | 68%: 4.333–5.564 |
z_bhs | BH* channel fit | 5.310 | bhs_bb4200_b4 |
z_agn | Colour-lane fit | — | — |
Spectral checks
- V-shape (spectrum)
- inconclusive
- Star (spectrum)
- no
- V-shape (photometry)
- not measurable βUV not measured, βopt not measured at z_agn
- Line in F410M
- Ha 0 line-free optical band(s)
- Line-ambiguous
- yes
- Settling verdict
- inconclusive
Literature
Published objects within 1″ of this position. A match is a positional recovery, not an adopted classification.
- Barro et al. (2025)
- de Graaff et al. (2025)
- Kocevski et al. (2024)
- Kokorev et al. (2024)
- Matthee et al. (2026)
- Weibel et al. (2026), BH*-dominated sample
- Baccus+2026 (DJA census) broad-line AGN
- Hviding+2025 broad-line AGN
- Jones+2025 broad-line AGN
- Rusakov+2026 broad-line AGN
- Scholtz+2026 (LRD/LBD BLR) broad-line AGN
- Taylor+2025 (CEERS/RUBIES) broad-line AGN
- Yanagisawa+2026 (ATLAS I) broad-line AGN
Photometry
Circular aperture of radius 0.16″ at each band's native resolution, background from a 0.40–0.65″ annulus, programmes combined by inverse variance. For a point source multiply by the field's aperture correction (r = 0.16″ → 0.70″). Grey rows are below S/N 2.
| Band | Instrument | Pivot (µm) | f (nJy) | σ (nJy) | AB mag | S/N | Ap. corr. |
|---|---|---|---|---|---|---|---|
| F115W | NIRCam wide | 1.154 | 28.64 | 3.65 | 27.76 | 7.8 | 1.36 |
| F150W | NIRCam wide | 1.501 | 41.94 | 3.17 | 27.34 | 13.2 | 1.38 |
| F200W | NIRCam wide | 1.989 | 63.99 | 2.74 | 26.89 | 23.3 | 1.40 |
| F356W | NIRCam wide | 3.568 | 459.75 | 2.79 | 24.74 | 164.7 | 1.51 |
| F410M | NIRCam medium | 4.082 | 1900.36 | 7.74 | 23.20 | 245.5 | 1.56 |
| F444W | NIRCam wide | 4.404 | 1211.28 | 4.17 | 23.69 | 290.8 | 1.60 |
Provenance
- Field
- EGS (CEERS NIRSpec P4) (
ceersnirspecp4mrmsata) - Programmes
01345behind every mosaic the field measured- Pipeline rows merged
- 1 all at one position
- Detection pass
- original
- Release build
33af9933d1cc2026-10-17T14:29:44Z
Image sources
| Band | Mosaic | Native pixel | Coverage |
|---|---|---|---|
| F115W | jw01345-o061_t043_nircam_clear-f115w_i2d.fits | 0.031″ | 1.00 |
| F150W | jw01345-o061_t043_nircam_clear-f150w_i2d.fits | 0.031″ | 1.00 |
| F200W | jw01345-o061_t043_nircam_clear-f200w_i2d.fits | 0.031″ | 1.00 |
| F356W | jw01345-o061_t043_nircam_clear-f356w_i2d.fits | 0.063″ | 1.00 |
| F410M | jw01345-o061_t043_nircam_clear-f410m_i2d.fits | 0.063″ | 1.00 |
| F444W | jw01345-o061_t043_nircam_clear-f444w_i2d.fits | 0.063″ | 1.00 |
Cite
Anderson, Jordan (2026). LRD Watch DR1: little red dot candidates from an independent search of public JWST imaging (Version DR1) [Data set]. Cerin Amroth Research. Zenodo. https://doi.org/10.5281/zenodo.23062632 Object LRDW J141910.88+524719.8.
CC BY 4.0. Please also acknowledge the JWST programmes that took the data. LRD Watch DR1 is a vetted candidate catalogue, not a complete census: it has no selection function and cannot on its own give number densities. About the release.