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Swift J185416.6-534725

Classification: Confirmed transient

Total | Soft | Medium | Hard | Exposure

Postage stamp image of Swift J185416.6-534725

This image is 160 pixels (=6.3′ to a side).
Swift J185416.6-534725 is indicated by the cross-hairs.

Detection flag:: Good
RA (J2000):: 18^h 54^m 16.65^s=283.5694°
Dec (J2000):: -53° 47′ 25.7″=-53.7905°
Err₉₀:: 4.6′′
l:: +342° 30′ 10.9″=342.5030°
b:: -21° 59′ 20.7″=-21.9891°
LSXPS_ID:: LSXPS J185416.6-534725.
First detected:: 2025-08-06 05:53:34
Obs 00019980003
Discovery time: 2025-08-06 15:33:44
Peak rate: 3.3 (+0.9, -0.8) ×10^-2 (0.3 — 10 keV)
Historical upper limits: 2.05 ×10^-2 (0.3 — 10 keV; 3-σ)
(from LSXPS [00019980001]) [Show all limits].
LSXPS:: 2.05 ×10^-2 ct/sec (0.3—10 keV)
(00019980001)
XMM:
Canned: 0.12 ct/sec (0.3—10 keV)
Disc spec: 0.12 ct/sec (0.3—10 keV)
Full spec: 0.13 ct/sec (0.3—10 keV)
Native: 1.86 ct/sec (native, 0.2—12 keV)
Mode / filter: SLEW, pn, Medium
ROSAT:
Canned: 9.19 ×10^-2 ct/sec (0.3—2 keV)
0.10 ct/sec (0.3—10 keV)
Disc spec: 0.10 ct/sec (0.3—2 keV)
0.11 ct/sec (0.3—10 keV)
Full spec: 0.10 ct/sec (0.3—2 keV)
0.11 ct/sec (0.3—10 keV)
Native: 0.20 ct/sec (native, 0.2—2 keV)
Outburst significance: 1.58 σ
Search 5-σ radius: SIMBAD |Vizier.
XRT Team comments:: High proper motion star: UCAC4 182-206919

Light curve (0.3 — 10 keV)

GRB binning | ObsID binning | Snapshot binning.

Show plot axis controls or click to zoom [more].

Spectrum - discovery observation only

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Discovery spectrum of Swift J185416.6-534725

N_H	5 (+9, -4) × 10²¹ cm^-2
z of absorber	0
Photon index	4.0 (+2.0, -1.8)
Flux (0.3-10 keV) (Observed)	4.6 (+3.5, -1.9) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	4 (+37, -4) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	1.71 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	1.59 × 10^-10 erg cm^-2 ct^-1
W-stat What's this?(dof)	5.74 (14)
Spectrum exposure	1.3 ks

Spectrum - all available data

Download tar file

Discovery spectrum of Swift J185416.6-534725

N_H	6 (+10, -5) × 10²¹ cm^-2
z of absorber	0
Photon index	4.2 (+3.7, -1.9)
Flux (0.3-10 keV) (Observed)	3.1 (+2.1, -1.2) × 10^-13 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	5 (+41, -4) × 10^-12 erg cm^-2 s^-1
Counts to flux (obs)	1.67 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	2.62 × 10^-10 erg cm^-2 ct^-1
W-stat What's this?(dof)	7.20 (17)
Spectrum exposure	2.2 ks

Data for your light curve

Swift J185416.6-534725 — binning.