GRB 200424A: Swift observation summary

Mission:	INTEGRAL
GRB RA:	307.506°
GRB Dec:	-39.694°
GRB Err:	1.5 arcmin
T0:	2020-04-24 12:06:45 UT
Galactic:	1.82° -35.23°
Galactic N_H:	3.64× 10²⁰ cm^-2
Galactic E(B-V):	0.04975732

Sun distance:	94.55°
Sun angle:	5.67 [hr] (West of Sun)
Moon distance:	107.86°
Visibility of this field.

Data analysed so far:

ObsID: 00020989001 with 5.0 ks exposure.

Source 1 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 INTEGRAL pos	Exposure	Notes	Vizier
1 [details]	20h 30m 01.31s307.50547°	-39° 42′ 00.5″-39.70013°	3.0′′	Good	0.4′	9.5 ks	The source is fading with 4.8-σ significance.
Mean XRT rate: 8.3 (±1.6) ×10^-3 ct s^-1 Peak XRT rate: 8.3 (±1.6) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.05 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 2.8 (±0.5) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 2.8 (±0.5) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position \| Expected serendipitous sources: ~4.21×10^-3 [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 8 sources have been found in the XRT data. 0 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Dist from INTEGRAL pos	Exposure	Notes
1 [details]	20h 30m 01.31s307.50547°	-39° 42′ 00.5″-39.70013°	3.0′′	Good	0.4′	9.5 ks	The source is fading with 4.8-σ significance.
Mean XRT rate: 8.3 (±1.6) ×10^-3 ct s^-1 Peak XRT rate: 8.3 (±1.6) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.05 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 2.8 (±0.5) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 2.8 (±0.5) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position \| Expected serendipitous sources: ~4.21×10^-3 [What is this?]
2 [details]	20h 30m 22.37s307.59320°	-39° 52′ 02.8″-39.86745°	4.4′′	Good	11.2′	7.9 ks
Mean XRT rate: 3.8 (±0.9) ×10^-3 ct s^-1 Peak XRT rate: 3.8 (±0.9) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.12 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.9 (±0.5) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.9 (±0.5) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position \| Expected serendipitous sources: ~0.8 [What is this?]
3 [details]	20h 29m 55.96s307.48316°	-39° 43′ 47.8″-39.72993°	4.6′′	Good	2.4′	9.5 ks
Mean XRT rate: 2.6 (±0.7) ×10^-3 ct s^-1 Peak XRT rate: 2.5 (±0.7) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.08 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.01 (+0.27, -0.25) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 9.8 (±2.8) ×10^-14 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~0.05 [What is this?]
4 [details]	20h 30m 59.36s307.74733°	-39° 47′ 57.3″-39.79925°	4.7′′	Good	12.8′	9.4 ks
Mean XRT rate: 4.1 (±1.0) ×10^-3 ct s^-1 Peak XRT rate: 4.1 (±1.0) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.04 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.06 (±0.26) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.06 (±0.26) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~0.8 [What is this?]
5 [details]	20h 30m 42.40s307.67668°	-39° 40′ 58.4″-39.68290°	5.2′′	Reasonable	7.9′	9.5 ks
Mean XRT rate: 1.1 (+0.5, -0.4) ×10^-3 ct s^-1 Peak XRT rate: 1.1 (+0.5, -0.4) ×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?]
6 [details]	20h 29m 18.14s307.32557°	-39° 35′ 26.3″-39.59063°	4.8′′	Poor	10.4′	4.5 ks
Mean XRT rate: 2.10 (+1.15, -0.87) ×10^-3 ct s^-1 Peak XRT rate: 2.10 (+1.15, -0.87) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.05 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 2.5 (+1.4, -1.0) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 2.5 (+1.4, -1.0) ×10^-14 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~1.2 [What is this?]
7 [details]	20h 29m 32.69s307.38621°	-39° 33′ 51.2″-39.56421°	5.2′′	Poor	9.6′	7.0 ks
Mean XRT rate: 2.1 (+0.9, -0.7) ×10^-3 ct s^-1 Peak XRT rate: 2.1 (+0.9, -0.7) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.04 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 4.9 (+2.1, -1.7) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 4.9 (+2.1, -1.7) ×10^-14 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
8 [details]	20h 30m 00.10s307.50041°	-39° 44′ 42.0″-39.74499°	4.8′′	Reasonable	3.1′	9.5 ks
Mean XRT rate: 1.0 (+0.5, -0.4) ×10^-3 ct s^-1 Peak XRT rate: 1.0 (+0.5, -0.4) ×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: ~0.00×10⁺⁰ [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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Exposure map

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FITS exposure map.