GRB 250314A: Swift observation summary

This is a confirmed GRB (GRB 250314A), the afterglow is source 1 -- please see the GRB results at https://www.swift.ac.uk/xrt_products/00019616 for updated analysis

Mission:	SVOM/ECLAIRs
SVOM RA:	201.272°
SVOM Dec:	-5.293°
SVOM Err:	8.6 arcmin
T0:	2025-03-14 12:56:42 UT
Galactic:	318.27° +56.57°
Galactic N_H:	2.45× 10²⁰ cm^-2

Sun distance:	152.01°
Sun angle:	10.20 [hr](West of Sun)
Moon distance:	25.23°
Visibility of this field.
First slew:	2025-03-14 14:27:46 UT
First observation:	2025-03-14 14:27:12 UT
First analysis:	2025-03-15 07:01:41 UT

Data analysed so far:

ObsID: 00019616001 with 1.7 ks exposure.

About tiled field analysis.

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

19616 — 1.7 ks of cleaned data taken between 2025-03-14 14:27:41 and 2025-03-14 14:59:04

Details of afterglow candidates

1 sources were found which matches the afterglow criteria.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Rank³	Dist from SVOM/ECLAIRs pos	Exposure	Notes	Vizier
1 [details]	13h 25m 12.33s201.30136°	-05° 16′ 56.1″-5.28226°	3.4′′ ^*	Good	2 (O)	1.9′	3.9 ks	The source is fading with 3.8-σ significance. The source is 4.1-σ above the LSPXS limit.
Mean XRT rate: 4.7 (±0.7) ×10^-2 ct s^-1 Peak XRT rate: 5.2 (±1.2) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.073 (±0.011) ct s^-1 Peak XRT rate converted to PSPC: 0.082 (±0.019) ×10^-2 ct s^-1 Mean XRT flux: 1.20 (±0.17) ×10^-12 erg cm^-1s^-1 Peak XRT flux: 1.3 (±0.3) ×10^-12 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position

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.

Find an upper limit.

Sources found so far

So far 3 sources have been found in the XRT data. 0 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Rank³	Dist from SVOM/ECLAIRs pos	Exposure	Notes
1 [details]	13h 25m 12.33s201.30136°	-05° 16′ 56.1″-5.28226°	3.4′′ ^*	Good	2 (O)	1.9′	3.9 ks	The source is fading with 3.8-σ significance. The source is 4.1-σ above the LSPXS limit.
Mean XRT rate: 4.7 (±0.7) ×10^-2 ct s^-1 Peak XRT rate: 5.2 (±1.2) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.073 (±0.011) ct s^-1 Peak XRT rate converted to PSPC: 0.082 (±0.019) ×10^-2 ct s^-1 Mean XRT flux: 1.20 (±0.17) ×10^-12 erg cm^-1s^-1 Peak XRT flux: 1.3 (±0.3) ×10^-12 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position
2 [details]	13h 25m 20.82s201.33675°	-05° 09′ 49.9″-5.16385°	3.7′′ ^*	Good	3 (U)	8.7′	3.9 ks
Mean XRT rate: 1.54 (+0.31, -0.29) ×10^-2 ct s^-1 Peak XRT rate: 2.0 (±0.5) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.06 ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.024 (±0.005) ct s^-1 Peak XRT rate converted to PSPC: 0.031 (±0.008) ×10^-2 ct s^-1 Mean XRT flux: 5.9 (+1.2, -1.1) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 7.7 (±1.8) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position
3 [details]	13h 25m 47.39s201.44746°	-05° 16′ 16.2″-5.27117°	5.2′′ ^*	Good	3 (U)	10.6′	3.9 ks
Mean XRT rate: 6.5 (+2.0, -1.6) ×10^-3 ct s^-1 Peak XRT rate: 7.8 (+3.3, -2.6) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.11 ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 2.6 (+0.8, -0.6) ×10^-3 ct s^-1 Peak XRT rate converted to PSPC: 3.1 (+1.3, -1.0) ×10^-3 ct s^-1 Mean XRT flux: 6.1 (+1.9, -1.5) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 7.4 (+3.1, -2.5) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position

Image

Select image style: Draggable PNG | JS9.

Magnify image and make scrollable?

FITS image.

Exposure map

Magnify exposure map and make scrollable?

FITS exposure map.