GRB 210406A: Swift observation summary

Mission:	INTEGRAL
GRB RA:	132.459°
GRB Dec:	+76.532°
GRB Err:	1.5 arcmin
T0:	2021-04-06 17:11:22 UT
Galactic:	136.92° +33.08°
Galactic N_H:	2.14× 10²⁰ cm^-2
Galactic E(B-V):	0.02111234

Sun distance:	89.43°
Sun angle:	7.78 [hr] (East of Sun)
Moon distance:	123.92°
Visibility of this field.

Data analysed so far:

ObsID: 00021427001 with 3.3 ks exposure.
ObsID: 00021427002 with 1.8 ks exposure.

About ToO analysis.

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Sources found so far

So far 4 sources have been found in the XRT data. 2 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Dist from INTEGRAL pos	Exposure	Notes
1 [details]	08h 52m 11.46s133.04774°	+76° 27′ 15.9″76.45443°	2.9′′	Good	9.5′	3.5 ks	Matches known X-ray source: XMMSL2 J085211.0+762711 (from XMM-NEWTON/XMMSLEWCLN), 7.5″ away. Matches SIMBAD source: 1RXS J085211.8+762711, 5.2″ away.
Mean XRT rate: 2.2 (±0.4) ×10^-2 ct s^-1 Peak XRT rate: 2.3 (±0.4) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (XRT equiv count-rate) Mean XRT flux: 8.8 (+1.5, -1.4) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 9.0 (±1.7) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position \| Expected serendipitous sources: ~0.04 [What is this?]
2 [details]	08h 47m 03.56s131.76482°	+76° 36′ 50.8″76.61412°	7.4′′	Good	10.9′	5.1 ks	Matches known X-ray source: 1WGA J0846.9+7636 (from ROSAT/WGACAT), 15.2″ away.
Mean XRT rate: 2.88 (+1.12, -0.90) ×10^-3 ct s^-1 Peak XRT rate: 2.88 (+1.12, -0.90) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (XRT equiv count-rate) Mean XRT flux: 7.0 (+2.7, -2.2) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 7.0 (+2.7, -2.2) ×10^-14 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~0.9 [What is this?]
3 [details]	08h 49m 59.72s132.49884°	+76° 31′ 44.0″76.52888°	6.4′′	Poor	0.6′	5.1 ks
Mean XRT rate: 1.3 (+0.8, -0.6) ×10^-3 ct s^-1 Peak XRT rate: 1.3 (+0.8, -0.6) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.06 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.5 (+0.9, -0.6) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.5 (+0.9, -0.6) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~1.95×10^-2 [What is this?]
4 [details]	08h 50m 40.23s132.66762°	+76° 34′ 34.0″76.57610°	6.5′′	Good	3.9′	5.1 ks
Mean XRT rate: 2.0 (+0.9, -0.7) ×10^-3 ct s^-1 Peak XRT rate: 2.0 (+0.9, -0.7) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 5.5 (+2.4, -1.9) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 5.5 (+2.4, -1.9) ×10^-14 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~0.2 [What is this?]

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.