GRB 190530A: Swift observation summary

Mission:	Fermi/LAT
GRB RA:	120.762°
GRB Dec:	+35.502°
GRB Err:	10.2 arcmin
T0:	2019-05-30 10:18:44 UT
Galactic:	185.46° +29.18°
Galactic N_H:	4.28× 10²⁰ cm^-2
Galactic E(B-V):	0.04973082

Sun distance:	48.52°
Sun angle:	3.58 [hr] (East of Sun)
Moon distance:	96.29°
Visibility of this field.

Data analysed so far:

ObsID: 00020893001 with 3.1 ks exposure.

Source 5 has been manually confirmed as the GRB afterglow; data for this object are now available through the main GRB results area for this GRB.

About ToO analysis.

Probable afterglow details

A source was found which matches the afterglow criteria.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Dist from LAT pos	Exposure	Notes	Vizier
5 [details]	08h 02m 07.78s120.53242°	+35° 28′ 46.1″35.47947°	1.4′′	Good	11.3′	3.1 ks	The source is 4.5-σ above the RASS limit.
Mean XRT rate: 0.756 (±0.024) ct s^-1 Peak XRT rate: 1.35 (±0.29) ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 2.70 (±0.08) ×10^-11 erg cm^-1s^-1 Peak XRT flux: 4.8 (±1.1) ×10^-11 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position \| Expected serendipitous sources: ~7.40×10^-5 [What is this?]

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

Find an upper limit.

Sources found so far

So far 5 sources have been found in the XRT data. 1 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Dist from LAT pos	Exposure	Notes
1 [details]	08h 02m 18.70s120.57790°	+35° 31′ 43.5″35.52876°	6.9′′	Poor	9.1′	3.1 ks
Mean XRT rate: 2.7 (+1.7, -1.3) ×10^-3 ct s^-1 Peak XRT rate: 2.7 (+1.7, -1.3) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.05 ct s^-1 (XRT equiv count-rate) Products: Light curve \| Expected serendipitous sources: ~0.8 [What is this?]
2 [details]	08h 02m 21.04s120.58766°	+35° 32′ 17.6″35.53823°	1.9′′	Good	8.8′	3.1 ks	Matches known X-ray source: 1RXS J080221.8+353231 (from ROSAT/RASSFSC), 12.855641907054″ away. Matches SIMBAD source: 2MASS J08022101+3532191, 5.4″ away.
Mean XRT rate: 2.9 (±0.4) ×10^-2 ct s^-1 Peak XRT rate: 3.8 (±1.0) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.08 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.06 (+0.14, -0.13) ×10^-12 erg cm^-1s^-1 Peak XRT flux: 1.4 (±0.4) ×10^-12 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position \| Expected serendipitous sources: ~0.03 [What is this?]
3 [details]	08h 03m 32.90s120.88709°	+35° 38′ 55.7″35.64882°	6.3′′	Poor	10.7′	3.1 ks
Mean XRT rate: 2.23 (+1.36, -0.97) ×10^-3 ct s^-1 Peak XRT rate: 2.23 (+1.36, -0.97) ×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: ~0.6 [What is this?]
4 [details]	08h 03m 03.36s120.76399°	+35° 21′ 03.2″35.35090°	7.8′′	Good	9.1′	3.1 ks
Mean XRT rate: 3.1 (+1.5, -1.1) ×10^-3 ct s^-1 Peak XRT rate: 3.1 (+1.5, -1.1) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 7.9×10^-3 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 3.5 (+1.7, -1.3) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 3.5 (+1.7, -1.3) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~0.7 [What is this?]
5 [details]	08h 02m 07.78s120.53242°	+35° 28′ 46.1″35.47947°	1.4′′	Good	11.3′	3.1 ks	The source is 4.5-σ above the RASS limit.
Mean XRT rate: 0.756 (±0.024) ct s^-1 Peak XRT rate: 1.35 (±0.29) ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 2.70 (±0.08) ×10^-11 erg cm^-1s^-1 Peak XRT flux: 4.8 (±1.1) ×10^-11 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position \| Expected serendipitous sources: ~7.40×10^-5 [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.