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Swift J185845.5-075229

Classification: Confirmed transient

Total | Soft | Medium | Hard | Exposure

Postage stamp image of Swift J185845.5-075229

This image is 160 pixels (=6.3′ to a side).
Swift J185845.5-075229 is indicated by the cross-hairs.

Detection flag:: Good
RA (J2000):: 18^h 58^m 45.55^s=284.6898°
Dec (J2000):: -07° 52′ 28.7″=-7.8746°
Err₉₀:: 3.5′′
l:: +26° 44′ 04.9″=26.7347°
b:: -05° 11′ 59.6″=-5.1999°
LSXPS_ID:: Not yet in LSXPS.
First detected:: 2025-07-03 03:01:55
(Obs 00019906001: not yet in LSXPS)
Discovery time: 2025-07-03 12:54:14
Peak rate: 1.44 (±0.06) (0.3 — 2 keV)
Historical upper limits: 2.90 ×10^-2 (0.3 — 2 keV; 3-σ)
(from RASS_DiscoverySpectrum) [Show all limits].
LSXPS:: Not available
XMM:: Not available
ROSAT:
Canned: 2.11 ×10^-2 ct/sec (0.3—2 keV)
5.24 ×10^-2 ct/sec (0.3—10 keV)
Disc spec: 2.90 ×10^-2 ct/sec (0.3—2 keV)
7.69 ×10^-2 ct/sec (0.3—10 keV)
Full spec: 2.90 ×10^-2 ct/sec (0.3—2 keV)
7.64 ×10^-2 ct/sec (0.3—10 keV)
Native: 4.59 ×10^-2 ct/sec (native, 0.2—2 keV)
Outburst significance: 11.97 σ
Search 5-σ radius: SIMBAD |Vizier.
XRT Team comments:: This corresponds to multi-trigger "GRB" 250702B/C/D/E (also known as EP250702a).

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

Download tar file

Discovery spectrum of Swift J185845.5-075229

N_H	1.02 (+0.26, -0.22) × 10²² cm^-2
z of absorber	0
Photon index	1.59 (+0.21, -0.20)
Flux (0.3-10 keV) (Observed)	4.7 (+0.5, -0.4) × 10^-11 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	6.8 (+0.8, -0.6) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	6.23 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	9.07 × 10^-11 erg cm^-2 ct^-1
W-stat What's this?(dof)	305.70 (377)
Spectrum exposure	2.3 ks

Spectrum - all available data

Download tar file

Discovery spectrum of Swift J185845.5-075229

N_H	1.05 (+0.24, -0.21) × 10²² cm^-2
z of absorber	0
Photon index	1.64 (+0.20, -0.19)
Flux (0.3-10 keV) (Observed)	1.77 (+0.17, -0.15) × 10^-11 erg cm^-2 s^-1
Flux (0.3-10 keV) (Unabsorbed)	2.65 (+0.32, -0.24) × 10^-11 erg cm^-2 s^-1
Counts to flux (obs)	6.14 × 10^-11 erg cm^-2 ct^-1
Counts to flux (unabs)	9.19 × 10^-11 erg cm^-2 ct^-1
W-stat What's this?(dof)	375.74 (404)
Spectrum exposure	6.2 ks

Data for your light curve

Swift J185845.5-075229 — binning.