GRB 150724B: Swift observation summary

Mission:	Fermi/LAT
GRB RA:	351.920°
GRB Dec:	+3.670°
GRB Err:	19.8 arcmin
T0:	2015-07-24 18:45:22 UT
Galactic:	86.43° -53.16°
Galactic N_H:	4.84× 10²⁰ cm^-2
Galactic E(B-V):	0.06100652

Sun distance:	127.24°
Sun angle:	8.79 [hr] (West of Sun)
Moon distance:	134.71°
Visibility of this field.

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 field 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
1 [details]	23h 27m 33.71s351.89046°	+03° 49′ 05.2″3.81811°	4.1′′	Good	9.1′	3.2 ks	The source is fading.
Mean XRT rate: 1.25 (±0.24) ×10^-2 ct s^-1 Peak XRT rate: 1.6 (±0.4) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.02 ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.018 (±0.003) ct s^-1 Peak XRT rate converted to PSPC: 0.024 (±0.006) ct s^-1 Mean XRT flux: 3.0 (±0.6) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 3.9 (±0.9) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~3.30×10^-3 [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.

Find an upper limit.

Sources found so far

So far 4 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]	23h 27m 33.71s351.89046°	+03° 49′ 05.2″3.81811°	4.1′′	Good	9.1′	3.2 ks	The source is fading.
Mean XRT rate: 1.25 (±0.24) ×10^-2 ct s^-1 Peak XRT rate: 1.6 (±0.4) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.02 ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.018 (±0.003) ct s^-1 Peak XRT rate converted to PSPC: 0.024 (±0.006) ct s^-1 Mean XRT flux: 3.0 (±0.6) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 3.9 (±0.9) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~3.30×10^-3 [What is this?]
2 [details]	23h 28m 01.13s352.00471°	+03° 43′ 58.7″3.73299°	5.8′′	Good	6.3′	3.6 ks	A SIMBAD object matches this source's position: (Show) USNO-A2.0 0900-20412361, 3.4′′ away
Mean XRT rate: 3.8 (±1.0) ×10^-3 ct s^-1 Peak XRT rate: 4.2 (±1.4) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 6.3 (±1.6) ×10^-3 ct s^-1 Peak XRT rate converted to PSPC: 7.0 (±2.4) ×10^-3 ct s^-1 Mean XRT flux: 7.9 (±2.0) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 9 (±3) ×10^-14 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~0.02 [What is this?]
3 [details]	23h 27m 07.91s351.78298°	+03° 49′ 28.7″3.82464°	6.4′′	Reasonable	12.4′	2.6 ks
Mean XRT rate: 0.00 (±0.00) ×10^-1 ct s^-1 Peak XRT rate: 0.00 (±0.00) ×10^-1 ct s^-1 RASS PSPC 3-σ upper limit: 0.02 ct s^-1 (PSPC count-rate) Products: Light curve \| Spectrum \| Expected serendipitous sources: ~0.04 [What is this?]
4 [details]	23h 28m 09.17s352.03822°	+03° 44′ 14.7″3.73741°	5.9′′	Reasonable	8.2′	3.3 ks
Mean XRT rate: 2.2 (±0.8) ×10^-3 ct s^-1 Peak XRT rate: 2.2 (±1.2) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 2.7 (±1.0) ×10^-3 ct s^-1 Peak XRT rate converted to PSPC: 2.7 (±1.4) ×10^-3 ct s^-1 Mean XRT flux: 5.1 (±1.9) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 5.3 (±2.7) ×10^-14 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~0.05 [What is this?]

Image

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FITS image.

Exposure map

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FITS exposure map.