GRB 150204A: Swift observation summary

Mission:	Swift/BAT
GRB RA:	160.241°
GRB Dec:	-64.043°
GRB Err:	3.0 arcmin
T0:	2015-02-04 06:31:05 UT
Galactic:	289.24° -4.70°
Galactic N_H:	4.17× 10²¹ cm^-2
Galactic E(B-V):	0.6579201

Sun distance:	97.78°
Sun angle:	10.49 [hr](West of Sun)
Moon distance:	77.09°
Visibility of this field.

Source 2 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 Swift/BAT pos	Exposure	Notes	Vizier
2 [details]	10h 40m 56.96s160.23735°	-64° 02′ 18.8″-64.03856°	5.0′′	Good	0.3′	7.3 ks	The source is fading.
Mean XRT rate: 8.7 (±1.7) ×10^-3 ct s^-1 Peak XRT rate: 8.7 (±1.7) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.04 ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 2.0 (±0.4) ×10^-3 ct s^-1 Peak XRT rate converted to PSPC: 2.0 (±0.4) ×10^-3 ct s^-1 Mean XRT flux: 3.5 (±0.7) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 3.5 (±0.7) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~1.50×10^-4 [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 8 sources have been found in the XRT data. 5 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Dist from Swift/BAT pos	Exposure	Notes
1 [details]	10h 39m 56.36s159.98483°	-63° 59′ 27.2″-63.99089°	3.7′′	Good	7.4′	7.5 ks	The source is brighter than the RASS limit. 27 catalogued X-ray sources match this source's position: (Show) '1WGA J1039.9-6359' is 3.5′′ away, err (3-σ)=20.8′′ (ROSAT/WGACAT) '1WGA J1039.9-6359' is 12.2′′ away, err (3-σ)=20.8′′ (ROSAT/WGACAT) '2RXP J103956.3-635927' is 0.7′′ away, err (3-σ)=32.1′′ (ROSAT/ROSPSPC) '2RXP J103956.4-635925' is 1.5′′ away, err (3-σ)=32.1′′ (ROSAT/ROSPSPC) '2RXP J103956.4-635928' is 1.5′′ away, err (3-σ)=32.1′′ (ROSAT/ROSPSPC) '2RXP J103957.3-635920' is 9.6′′ away, err (3-σ)=32.1′′ (ROSAT/ROSPSPC) '2RXP J103957.9-635921' is 11.9′′ away, err (3-σ)=32.1′′ (ROSAT/ROSPSPC) '2RXP J103958.1-635922' is 12.2′′ away, err (3-σ)=32.1′′ (ROSAT/ROSPSPC) '2RXP J103954.4-635930' is 13.2′′ away, err (3-σ)=32.1′′ (ROSAT/ROSPSPC) '2RXP J103954.3-635936' is 16.1′′ away, err (3-σ)=32.1′′ (ROSAT/ROSPSPC) '2RXP J103953.6-635934' is 19.7′′ away, err (3-σ)=32.1′′ (ROSAT/ROSPSPC) '2RXP J103956.3-635948' is 20.5′′ away, err (3-σ)=32.1′′ (ROSAT/ROSPSPC) '2RXP J104000.1-635930' is 24.6′′ away, err (3-σ)=32.1′′ (ROSAT/ROSPSPC) '2RXP J103951.9-635930' is 29.5′′ away, err (3-σ)=32.1′′ (ROSAT/ROSPSPC) '1WGA J1039.9-6359' is 10.4′′ away, err (3-σ)=80.1′′ (ROSAT/WGACAT) '1WGA J1039.9-6359' is 11.0′′ away, err (3-σ)=80.1′′ (ROSAT/WGACAT) '1WGA J1039.9-6359' is 15.1′′ away, err (3-σ)=80.1′′ (ROSAT/WGACAT) '1WGA J1039.9-6359' is 16.2′′ away, err (3-σ)=80.1′′ (ROSAT/WGACAT) '1WGA J1039.9-6359' is 16.4′′ away, err (3-σ)=80.1′′ (ROSAT/WGACAT) '1WGA J1039.9-6359' is 18.7′′ away, err (3-σ)=80.1′′ (ROSAT/WGACAT) '1WGA J1039.8-6359' is 21.0′′ away, err (3-σ)=80.1′′ (ROSAT/WGACAT) '1WGA J1039.8-6359' is 23.5′′ away, err (3-σ)=80.1′′ (ROSAT/WGACAT) '1WGA J1039.9-6359' is 25.6′′ away, err (3-σ)=80.1′′ (ROSAT/WGACAT) '1WGA J1040.0-6359' is 30.3′′ away, err (3-σ)=80.1′′ (ROSAT/WGACAT) '1WGA J1039.8-6359' is 31.4′′ away, err (3-σ)=80.1′′ (ROSAT/WGACAT) '1WGA J1039.9-6400' is 36.3′′ away, err (3-σ)=80.1′′ (ROSAT/WGACAT) '1WGA J1039.8-6359' is 37.5′′ away, err (3-σ)=80.1′′ (ROSAT/WGACAT) A SIMBAD object matches this source's position: (Show) V* V550 Car, 3.8′′ away
Mean XRT rate: 9.4 (±1.1) ×10^-2 ct s^-1 Peak XRT rate: 0.27 (±0.05) ct s^-1 RASS PSPC 3-σ upper limit: 0.09 ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.133 (±0.015) ct s^-1 Peak XRT rate converted to PSPC: 0.38 (±0.07) ct s^-1 Mean XRT flux: 2.17 (±0.24) ×10^-12 erg cm^-1s^-1 Peak XRT flux: 6.2 (±1.2) ×10^-12 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~2.15×10^-5 [What is this?]
2 [details]	10h 40m 56.96s160.23735°	-64° 02′ 18.8″-64.03856°	5.0′′	Good	0.3′	7.3 ks	The source is fading.
Mean XRT rate: 8.7 (±1.7) ×10^-3 ct s^-1 Peak XRT rate: 8.7 (±1.7) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.04 ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 2.0 (±0.4) ×10^-3 ct s^-1 Peak XRT rate converted to PSPC: 2.0 (±0.4) ×10^-3 ct s^-1 Mean XRT flux: 3.5 (±0.7) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 3.5 (±0.7) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~1.50×10^-4 [What is this?]
3 [details]	10h 39m 22.87s159.84530°	-64° 06′ 43.7″-64.11215°	6.6′′	Reasonable	11.2′	5.3 ks	This source may be affected by optical loading 3 catalogued X-ray sources match this source's position: (Show) '1WGA J1039.3-6406' is 9.1′′ away, err (3-σ)=20.8′′ (ROSAT/WGACAT) '2RXP J103923.4-640704' is 20.4′′ away, err (3-σ)=32.1′′ (ROSAT/ROSPSPC) '1WGA J1039.3-6407' is 33.8′′ away, err (3-σ)=80.1′′ (ROSAT/WGACAT) A SIMBAD object matches this source's position: (Show) HD 92536, 1.3′′ away
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: 0.05 ct s^-1 (PSPC count-rate) Products: Light curve \| Spectrum \| Expected serendipitous sources: ~0.02 [What is this?]
4 [details]	10h 40m 15.98s160.06660°	-63° 53′ 43.0″-63.89529°	4.9′′	Good	10.0′	6.9 ks	2 catalogued X-ray sources match this source's position: (Show) '1WGA J1040.2-6353' is 19.1′′ away, err (3-σ)=20.8′′ (ROSAT/WGACAT) '1WGA J1040.3-6352' is 31.1′′ away, err (3-σ)=80.1′′ (ROSAT/WGACAT)
Mean XRT rate: 4.2 (±1.1) ×10^-3 ct s^-1 Peak XRT rate: 5.3 (±1.6) ×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: 8.3 (±2.3) ×10^-3 ct s^-1 Peak XRT rate converted to PSPC: 0.010 (±0.003) ct s^-1 Mean XRT flux: 6.7 (±1.8) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 8.4 (±2.6) ×10^-14 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~4.99×10^-3 [What is this?]
5 [details]	10h 40m 21.90s160.09123°	-64° 00′ 30.1″-64.00835°	4.2′′	Good	4.5′	7.8 ks	This source may be affected by optical loading A SIMBAD object matches this source's position: (Show) HD 92663, 2.9′′ away
Mean XRT rate: 3.4 (±1.3) ×10^-3 ct s^-1 Peak XRT rate: 3.4 (±1.3) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.07 ct s^-1 (PSPC count-rate) Products: Light curve \| Spectrum \| Expected serendipitous sources: ~1.39×10^-3 [What is this?]
6 [details]	10h 41m 35.36s160.39734°	-64° 06′ 21.5″-64.10597°	4.8′′	Good	5.6′	7.0 ks	This source may be affected by optical loading A SIMBAD object matches this source's position: (Show) HD 92837, 1.9′′ away
Mean XRT rate: 1.7 (±0.9) ×10^-3 ct s^-1 Peak XRT rate: 2.3 (±1.6) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.05 ct s^-1 (PSPC count-rate) Products: Light curve \| Spectrum \| Expected serendipitous sources: ~5.86×10^-3 [What is this?]
7 [details]	10h 41m 14.48s160.31034°	-63° 57′ 35.2″-63.95979°	8.7′′	Poor	5.3′	7.7 ks
Mean XRT rate: 1.3 (±0.9) ×10^-3 ct s^-1 Peak XRT rate: 1.3 (±0.9) ×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: 1.5 (±1.0) ×10^-3 ct s^-1 Peak XRT rate converted to PSPC: 1.5 (±1.0) ×10^-3 ct s^-1 Mean XRT flux: 4.0 (±2.7) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 4.0 (±2.7) ×10^-14 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~7.49×10^-3 [What is this?]
8 [details]	10h 40m 47.10s160.19626°	-64° 01′ 54.8″-64.03189°	5.9′′	Reasonable	1.4′	6.8 ks
Mean XRT rate: 1.5 (±0.8) ×10^-3 ct s^-1 Peak XRT rate: 1.5 (±0.8) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.04 ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 4.0 (±2.1) ×10^-4 ct s^-1 Peak XRT rate converted to PSPC: 4.0 (±2.1) ×10^-4 ct s^-1 Mean XRT flux: 8 (±4) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 8 (±4) ×10^-14 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~1.96×10^-3 [What is this?]

Image

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FITS image.

Exposure map

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FITS exposure map.