GRB 240128A: Swift observation summary

Mission:	MAXI
GRB RA:	139.846°
GRB Dec:	-5.053°
GRB Err:	30.0 arcmin
T0:	2024-01-28 15:13:52 UT
Galactic:	236.78° +29.55°
Galactic N_H:	2.66× 10²⁰ cm^-2
Galactic E(B-V):	0.03141388

Sun distance:	155.41°
Sun angle:	11.43 [hr](West of Sun)
Moon distance:	34.72°
Visibility of this field.
First slew:	2024-01-29 04:06:30 UT
First observation:	2024-01-29 04:05:56 UT
First analysis:	UT

About tiled field analysis.

So far 0 fields have been scheduled for observations. Data are available and processed for 6 of these. The list gives the exposure time used in source detection. If any individual sources were selected for follow-up observations, the source detection is not repeated for the follow up observations and the table below is not updated.

21653 — 45 s of cleaned data taken between 2024-01-29 04:06:28 and 2024-01-29 04:12:15
21655 — 200 s of cleaned data taken between 2024-01-29 04:20:18 and 2024-01-29 04:25:31
21656 — 288 s of cleaned data taken between 2024-01-29 04:25:35 and 2024-01-29 04:30:51
21657 — 288 s of cleaned data taken between 2024-01-29 04:30:55 and 2024-01-29 04:36:08
21658 — 310 s of cleaned data taken between 2024-01-29 05:32:37 and 2024-01-29 05:41:56
21659 — 288 s of cleaned data taken between 2024-01-29 05:41:58 and 2024-01-29 05:47:17

Find an upper limit.

Sources found so far

So far 2 sources have been found in the XRT data. 1 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Dist from MAXI pos	Exposure	Notes
1 [details]	09h 20m 36.95s140.15397°	-05° 12′ 07.4″-5.20205°	4.8′′	Good	20.5′	8.0 ks
Mean XRT rate: 4.29 (+1.09, -0.85) ×10^-3 ct s^-1 Peak XRT rate: 1.5 (+0.8, -0.6) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.04 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.6 (+0.4, -0.3) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 5.7 (+3.1, -2.3) ×10^-13 erg cm^-1s^-1 Products: Spectrum \| Enhanced position
2 [details]	09h 18m 33.90s139.64123°	-05° 11′ 52.8″-5.19800°	7.6′′	Good	15.0′	288 s	Matches known X-ray source: 2SXPS J091833.9-051151 (from 2SXPS), 1.9″ away.
Mean XRT rate: 3.2 (+1.5, -1.2) ×10^-2 ct s^-1 Peak XRT rate: 3.2 (+1.5, -1.2) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.0 (+0.5, -0.4) ×10^-12 erg cm^-1s^-1 Peak XRT flux: 1.0 (+0.5, -0.4) ×10^-12 erg cm^-1s^-1 Products: Spectrum

¹ Radius, 90% confidence.
² Indicates how likely the source is to be real. See the 1SXPS documentation.
^* 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.