GRB 210506A: Swift observation summary

Mission:	Swift/BAT
GRB RA:	132.853°
GRB Dec:	+4.582°
GRB Err:	3.0 arcmin
T0:	2021-05-06 00:39:48 UT
Galactic:	223.18° +28.68°
Galactic N_H:	3.86× 10²⁰ cm^-2
Galactic E(B-V):	0.05150565

Sun distance:	88.31°
Sun angle:	5.97 [hr] (East of Sun)
Moon distance:	147.07°
Visibility of this field.

Data analysed so far:

ObsID: 00021430001 with 4.9 ks exposure.

About ToO analysis.

Find an upper limit.

Sources found so far

So far 9 sources have been found in the XRT data. 3 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Dist from Swift/BAT pos	Exposure	Notes
1 [details]	08h 51m 35.63s132.89847°	+04° 41′ 22.8″4.68968°	3.5′′	Good	7.0′	4.9 ks
Mean XRT rate: 1.61 (+0.23, -0.22) ×10^-2 ct s^-1 Peak XRT rate: 1.7 (±0.4) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.15 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.01 (+0.15, -0.14) ×10^-12 erg cm^-1s^-1 Peak XRT flux: 1.07 (±0.25) ×10^-12 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position \| Expected serendipitous sources: ~0.03 [What is this?]
2 [details]	08h 51m 45.42s132.93923°	+04° 29′ 31.6″4.49212°	4.4′′	Good	7.5′	4.9 ks
Mean XRT rate: 7.3 (±2.0) ×10^-3 ct s^-1 Peak XRT rate: 7.3 (±2.0) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.04 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 3.7 (±1.0) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 3.7 (±1.0) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position \| Expected serendipitous sources: ~0.1 [What is this?]
3 [details]	08h 51m 37.78s132.90741°	+04° 35′ 59.6″4.59988°	6.4′′	Reasonable	3.4′	4.9 ks
Mean XRT rate: 1.5 (+0.9, -0.7) ×10^-3 ct s^-1 Peak XRT rate: 1.5 (+0.9, -0.7) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.04 ct s^-1 (XRT equiv count-rate) Products: Light curve \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
4 [details]	08h 51m 30.33s132.87638°	+04° 42′ 19.1″4.70531°	5.6′′	Poor	7.5′	4.9 ks	Matches SIMBAD source: [VV2006] J085130.7+044220, 8.2″ away.
Mean XRT rate: 3.31 (+1.21, -0.98) ×10^-3 ct s^-1 Peak XRT rate: 3.31 (+1.21, -0.98) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate) Products: Light curve \| Enhanced position \| Expected serendipitous sources: ~0.4 [What is this?]
5 [details]	08h 51m 11.60s132.79835°	+04° 40′ 07.1″4.66865°	7.4′′	Good	6.1′	4.9 ks	Matches SIMBAD source: [VV2006] J085111.6+044010, 3.4″ away.
Mean XRT rate: 2.0 (+1.0, -0.8) ×10^-3 ct s^-1 Peak XRT rate: 2.0 (+1.0, -0.8) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.02 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 4.0 (+2.0, -1.6) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 4.0 (+2.0, -1.6) ×10^-14 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~0.5 [What is this?]
6 [details]	08h 51m 36.25s132.90105°	+04° 28′ 52.5″4.48126°	7.2′′	Poor	6.7′	4.9 ks
Mean XRT rate: 2.23 (+1.02, -0.81) ×10^-3 ct s^-1 Peak XRT rate: 2.23 (+1.02, -0.81) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.02 ct s^-1 (XRT equiv count-rate) Products: Light curve \| Expected serendipitous sources: ~0.5 [What is this?]
7 [details]	08h 51m 21.23s132.83847°	+04° 44′ 49.2″4.74699°	4.8′′	Good	9.9′	4.9 ks	Matches SIMBAD source: SDSS J085121.64+044447.6, 5″ away.
Mean XRT rate: 2.88 (+1.15, -0.92) ×10^-3 ct s^-1 Peak XRT rate: 2.88 (+1.15, -0.92) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.05 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.1 (±0.4) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.1 (±0.4) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position \| Expected serendipitous sources: ~0.8 [What is this?]
8 [details]	08h 51m 23.29s132.84702°	+04° 39′ 47.4″4.66316°	7.4′′	Poor	4.9′	4.9 ks
Mean XRT rate: 1.72 (+1.01, -0.78) ×10^-3 ct s^-1 Peak XRT rate: 1.72 (+1.01, -0.78) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.06 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.1 (+0.6, -0.5) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.1 (+0.6, -0.5) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~0.4 [What is this?]
9 [details]	08h 51m 10.02s132.79174°	+04° 36′ 15.2″4.60422°	7.9′′	Poor	3.9′	4.9 ks
Mean XRT rate: 1.8 (+1.0, -0.8) ×10^-3 ct s^-1 Peak XRT rate: 1.8 (+1.0, -0.8) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 1.85 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 2.8 (+1.5, -1.2) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 2.8 (+1.5, -1.2) ×10^-13 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.

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Exposure map

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FITS exposure map.