GRB 250419A: Swift observation summary

This is a confirmed GRB (GRB 250419A), the afterglow is source 1 -- please see the GRB results at https://www.swift.ac.uk/xrt_products/00019724 for updated analysis

Mission:	SVOM/ECLAIRs
SVOM RA:	202.387°
SVOM Dec:	+7.086°
SVOM Err:	9.2 arcmin
T0:	2025-04-19 02:29:32 UT
Galactic:	328.95° +68.01°
Galactic N_H:	2.05× 10²⁰ cm^-2

Sun distance:	161.27°
Sun angle:	11.70 [hr] (East of Sun)
Moon distance:	79.85°
Visibility of this field.

Data analysed so far:

ObsID: 00019724001 with 2.0 ks exposure.

About tiled field analysis.

So far 1 fields have been scheduled for observations. Data are available and processed for 1 of these.

19724 — 2.0 ks of cleaned data taken between 2025-04-19 03:27:38 and 2025-04-19 05:08:46

Find an upper limit.

Sources found so far

So far 3 sources have been found in the XRT data. 2 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Rank³	Dist from SVOM/ECLAIRs pos	Exposure	Notes
1 [details]	13h 29m 37.33s202.40554°	+07° 02′ 23.5″7.03987°	3.8′′	Good	3 (U)	3.0′	2.0 ks
Mean XRT rate: 0.111 (±0.010) ct s^-1 Peak XRT rate: 0.15 (±0.03) ct s^-1 RASS PSPC 3-σ upper limit: 0.05 ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.151 (±0.013) ct s^-1 Peak XRT rate converted to PSPC: 0.20 (±0.04) ct s^-1 Mean XRT flux: 3.9 (±0.3) ×10^-12 erg cm^-1s^-1 Peak XRT flux: 5.1 (±1.2) ×10^-12 erg cm^-1s^-1 Products: Light curve \| Spectrum
2 [details]	13h 29m 49.15s202.45478°	+07° 14′ 16.8″7.23801°	4.5′′	Good	4 (K)	10.0′	2.0 ks	Matches SIMBAD source: 3HSP J132949.1+071418, 1.8″ away. Matches known X-ray source: 1RXS J132948.9+071419 (from ROSAT/RASSFSC), 4.5352881045925″ away.
Mean XRT rate: 2.7 (±0.5) ×10^-2 ct s^-1 Peak XRT rate: 3.2 (±0.9) ×10^-2 ct s^-1 -0.90 σ above the catalogued flux from ROSAT/RASSFSC. RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.033 (±0.006) ct s^-1 Peak XRT rate converted to PSPC: 0.040 (±0.011) ×10^-2 ct s^-1 Mean XRT flux: 8.8 (±1.7) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.05 (±0.28) ×10^-12 erg cm^-1s^-1 Products: Light curve \| Spectrum
3 [details]	13h 30m 00.69s202.50288°	+07° 10′ 37.9″7.17720°	6.1′′	Good	3 (U)	8.8′	2.0 ks	This source may be affected by optical loading Matches SIMBAD source: HD 117404, 10.9″ away.
Mean XRT rate: 7.2 (+3.2, -2.5) ×10^-3 ct s^-1 Peak XRT rate: 7.2 (+3.2, -2.5) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.02 ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.0243 (+0.0107, -0.0084) ×10^-2 ct s^-1 Peak XRT rate converted to PSPC: 0.0243 (+0.0107, -0.0084) ×10^-2 ct s^-1 Mean XRT flux: 2.9 (+1.3, -1.0) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 2.9 (+1.3, -1.0) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum

¹ Radius, 90% confidence.
² Indicates how likely the source is to be real. See the LSXPS documentation.
³ T=Transient Source, O=Outbursting known source, U=Uncatalogued X-ray source, K=Known X-ray source.
^* The position was enhanced using astrometry derived from the Swift UVOT.
^† The position was astrometrically corrected using the XRT sources and the 2MASS catalogue.

Image

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FITS image.

Exposure map

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FITS exposure map.