# LRDW J010403.05-550856.4 — Cerin Amroth

Source: https://cerinamroth.com/jwst/lrds/dr1/j010403.05-550856.4/

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LRD Watch DR1 · catalog object

 

# LRDW J010403.05-550856.4

 

catalogTENTATIVEBH* channelPANORAMIC J010408-5508

 

 

 

RA 01:04:03.055 16.0127305°

 

Dec −55:08:56.41 -55.1490028°

 

[SIMBAD within 2″](https://simbad.cds.unistra.fr/simbad/sim-coo?Coord=16.012730+-55.149003&Radius=2&Radius.unit=arcsec) · [ESASky](https://sky.esa.int/esasky/?target=16.012730%20-55.149003&fov=0.02&sci=true)

 

  

 

## Images

 

 F115W image, 3.2 arcsec across, north up 

F115W0.02″ px

 F150W image, 3.2 arcsec across, north up 

F150W0.02″ px

 F200W image, 3.2 arcsec across, north up 

F200W0.02″ px

 F277W image, 3.2 arcsec across, north up 

F277W0.04″ px

 F356W image, 3.2 arcsec across, north up 

F356W0.04″ px

 F444W image, 3.2 arcsec across, north up 

F444W0.04″ px

 Colour composite: F444W red, F356W green, F277W blue, 3.2 arcsec across, north up NE

compositebar 1″

 

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, F410M.

 

 

 

  

## Spectral energy distribution

  
- NIRCam wide
- 2σ upper limit (S/N < 2)

 Aperture fluxes in a 0.16″-radius circle, not corrected to total; the values are in the photometry table below. The gold line marks the Balmer limit (3646 Å rest) at z = 8.022.  

 

## At a glance

 

TierTENTATIVE 

Found byBH* channel

Redshift8.02 BH* fit

Spectral shapeno labelled spectrum

F444W25.67 AB S/N 46, 0.16″ aperture

F277W − F444Wnot in the colour lane

BH* share0.69 cliff_degraaff25; Δχ² galaxy 3.6, dwarf 5.7

Compactnessgrowth ratio 1.822 stars 2.156

Balmer break6.05 ± 0.75 F444W/F277W, red:Hb+OIII

Image vettinghalf-stack no-coverage; no flags raised

Literature1 catalogue(s), 0 AGN paper(s) within 0.005″

 

 

 

 

 

## Vetting

 
- Image vettingnot applicable
- Half-stack testno-coverage
- Artifact risknone
- Neighbournone
- Extendedno

 
- BH* channelevidence dchi2_gal=3.6 dchi2_bd=5.7
- BH* channelBH* share 0.69 below 0.8 (composite)

 

 

 

## 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 | — | —
 | `z_vet` | Adopted by vetting | 8.0220 | bhstar:cliff_degraaff25
 | `z_phot` | Photometric (P(z) peak) | — | not fitted
 | `z_bhs` | BH* channel fit | 8.022 | cliff_degraaff25
 | `z_agn` | Colour-lane fit | — | —

 

 

 

 

 

## Spectral checks

 

V-shape (spectrum)no labelled spectrum

Star (spectrum)no spectrum

V-shape (photometry)not measurable βUV not measured, βopt not measured at z_agn

Line in F410Mnone 0 line-free optical band(s)

Line-ambiguousno

Settling verdictnot evaluated

 

 

 

## Literature

 

Published objects within 1″ of this position. A match is a positional recovery, not an adopted classification.

 
- Weibel et al. (2026), BH*-dominated sample

 

 

 

 

 

## 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 | 17.39 | 13.55 | 28.30 | 1.3 | 1.16
 | F150W | NIRCam wide | 1.501 | 30.03 | 10.28 | 27.71 | 2.9 | 1.23
 | F200W | NIRCam wide | 1.989 | 19.39 | 8.90 | 28.18 | 2.2 | 1.27
 | F277W | NIRCam wide | 2.762 | 32.43 | 3.96 | 27.62 | 8.2 | 1.38
 | F356W | NIRCam wide | 3.568 | 79.94 | 3.50 | 26.64 | 22.9 | 1.41
 | F444W | NIRCam wide | 4.404 | 196.26 | 4.24 | 25.67 | 46.3 | 1.45

 

 

 

## Provenance

 

 FieldPANORAMIC J010408-5508 (`panoramicj010408m5508`) Programmes`02514` behind every mosaic the field measured Pipeline rows merged1 all at one position Detection passoriginal Release build`33af9933d1cc` 2026-10-17T14:29:44Z 

 

## Image sources

 | Band | Mosaic | Native pixel | Coverage
 | F115W | `panoramic-j010408m5508-grizli-v7.2-f115w-clear_drc_sci.fits` | 0.020″ | 1.00
 | F150W | `panoramic-j010408m5508-grizli-v7.2-f150w-clear_drc_sci.fits` | 0.020″ | 1.00
 | F200W | `panoramic-j010408m5508-grizli-v7.2-f200w-clear_drc_sci.fits` | 0.020″ | 1.00
 | F277W | `panoramic-j010408m5508-grizli-v7.2-f277w-clear_drc_sci.fits` | 0.040″ | 1.00
 | F356W | `panoramic-j010408m5508-grizli-v7.2-f356w-clear_drc_sci.fits` | 0.040″ | 1.00
 | F444W | `panoramic-j010408m5508-grizli-v7.2-f444w-clear_drc_sci.fits` | 0.040″ | 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 J010403.05-550856.4.

 

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](https://cerinamroth.com/jwst/lrds/dr1/).

 

 [← LRDW J010302.65-491445.7](https://cerinamroth.com/jwst/lrds/dr1/j010302.65-491445.7/)[LRDW J010408.64-550952.9 →](https://cerinamroth.com/jwst/lrds/dr1/j010408.64-550952.9/)