GRB 170522A: Swift observation summary

Mission:	Fermi/LAT
GRB RA:	139.340°
GRB Dec:	+25.670°
GRB Err:	11.4 arcmin
T0:	2017-05-22 15:45:30 UT
Galactic:	201.91° +42.41°
Galactic N_H:	3.32× 10²⁰ cm^-2
Galactic E(B-V):	0.03233424

Sun distance:	72.39°
Sun angle:	5.31 [hr] (East of Sun)
Moon distance:	116.75°
Visibility of this field.
First slew:	2017-05-23 02:42:33 UT
First observation:	2017-05-23 02:40:28 UT
First analysis:	UT

About tiled field analysis.

So far 3 fields have been scheduled for observations. Data are available and processed for 4 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.

20771 — 1.2 ks of cleaned data taken between 2017-05-23 02:41:14 and 2017-05-23 05:59:08
20772 — 1.2 ks of cleaned data taken between 2017-05-23 02:51:54 and 2017-05-23 04:27:32
20773 — 1.2 ks of cleaned data taken between 2017-05-23 03:02:26 and 2017-05-23 06:00:21
20774 — 1.1 ks of cleaned data taken between 2017-05-23 03:12:52 and 2017-05-23 05:57:45

An additional 2 fields have also been used for follow up observations. These data are not searched for sources, but are used to update the light curves etc of any sources already found.

Find an upper limit.

Sources found so far

So far 4 sources have been found in the XRT data. 0 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Dist from LAT pos	Exposure
1 [details]	09h 16m 36.82s139.15340°	+25° 29′ 03.9″25.48442°	3.8′′	Good	15.0′	5.9 ks
Mean XRT rate: 5.1 (±1.4) ×10^-3 ct s^-1 Peak XRT rate: 5.1 (±1.4) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.02 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 2.0 (±0.5) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 2.0 (±0.5) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position Expected serendipitous sources: ~0.5 [What is this?]
2 [details]	09h 16m 56.47s139.23528°	+25° 28′ 26.7″25.47409°	5.1′′	Good	13.0′	4.8 ks
Mean XRT rate: 5.1 (±1.3) ×10^-3 ct s^-1 Peak XRT rate: 5.1 (±1.3) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.04 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.2 (±0.3) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.2 (±0.3) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position Expected serendipitous sources: ~0.5 [What is this?]
3 [details]	09h 16m 26.38s139.10991°	+25° 52′ 32.2″25.87560°	6.5′′	Good	17.5′	2.0 ks
Mean XRT rate: 6.6 (+2.9, -2.2) ×10^-3 ct s^-1 Peak XRT rate: 6.6 (+2.9, -2.2) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate) Products: Light curve
4 [details]	09h 16m 12.85s139.05354°	+25° 37′ 04.5″25.61791°	10.2′′	Reasonable	15.8′	4.7 ks
Mean XRT rate: 2.53 (+1.01, -0.81) ×10^-3 ct s^-1 Peak XRT rate: 2.53 (+1.01, -0.81) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.05 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.2 (+0.5, -0.4) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.2 (+0.5, -0.4) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum Expected serendipitous sources: ~1.14×10^-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.