sb25032901: Swift observation summary

This is a confirmed GRB (GRB 250329A), the afterglow is source 1 -- please see the GRB results at https://www.swift.ac.uk/xrt_products/00019666 for updated analysis

Mission:	SVOM/ECLAIRs
SVOM RA:	197.437°
SVOM Dec:	+9.485°
SVOM Err:	2.9 arcmin
T0:	2025-03-29 04:17:52 UT
Galactic:	317.56° +71.83°
Galactic N_H:	1.92× 10²⁰ cm^-2

Sun distance:	163.93°
Sun angle:	11.35 [hr] (West of Sun)
Moon distance:	161.97°
Visibility of this field.
First slew:	2025-03-29 06:07:51 UT
First observation:	2025-03-29 06:07:19 UT
First analysis:	2025-03-29 12:01:17 UT

Data analysed so far:

ObsID: 00019666001 with 1.6 ks exposure.

About tiled field analysis.

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

19666 — 1.6 ks of cleaned data taken between 2025-03-29 06:07:48 and 2025-03-29 07:56:10

Find an upper limit.

Sources found so far

So far 2 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
1 [details]	13h 09m 47.15s197.44646°	+09° 29′ 46.3″9.49619°	4.7′′ ^*	Good	3 (U)	0.9′	1.6 ks
Mean XRT rate: 3.0 (±0.5) ×10^-2 ct s^-1 Peak XRT rate: 3.6 (±0.7) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.04 ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.036 (+0.007, -0.006) ct s^-1 Peak XRT rate converted to PSPC: 0.043 (±0.009) ×10^-2 ct s^-1 Mean XRT flux: 1.56 (+0.28, -0.27) ×10^-12 erg cm^-1s^-1 Peak XRT flux: 1.9 (±0.4) ×10^-12 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position
2 [details]	13h 08m 59.40s197.24749°	+09° 32′ 08.2″9.53561°	6.5′′	Good	3 (U)	11.6′	1.6 ks
Mean XRT rate: 6.0 (+3.2, -2.5) ×10^-3 ct s^-1 Peak XRT rate: 6.0 (+3.2, -2.5) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.04 ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 8 (+4, -3) ×10^-3 ct s^-1 Peak XRT rate converted to PSPC: 8 (+4, -3) ×10^-3 ct s^-1 Mean XRT flux: 2.5 (+1.4, -1.0) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 2.5 (+1.4, -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.