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Home > GRB products > GRB 140818A

TILED_GRB00029

GRB

GRB 140818A: Swift observation summary

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 tiled field analysis.

So far 6 fields have been scheduled for observations. Data are available and processed for 5 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.

• 20408 — 965 s of cleaned data taken between 2014-08-18 08:26:19 and 2014-08-18 10:27:53
• 20409 — 965 s of cleaned data taken between 2014-08-18 08:37:12 and 2014-08-18 10:21:42
• 20410 — 922 s of cleaned data taken between 2014-08-18 08:47:54 and 2014-08-18 10:08:16
• 20411 — 907 s of cleaned data taken between 2014-08-18 08:58:25 and 2014-08-18 10:15:12
• 20412 — 4.0 ks of cleaned data taken between 2014-08-21 00:38:30 and 2014-08-21 04:07:39

Probable afterglow details

A source was found which matches the afterglow criteria.

#	RA (J2000)	Dec (J2000)	Err901	Detection Flag2	Dist from MAXI pos	Exposure	Notes	Vizier
1 [details]	13h 18m 15.03s199.56263°	+06° 55′ 21.5″6.92263°	2.2′′ *	Good	1.9′′	4.9 ks	The source is brighter than the RASS limit.
Mean XRT rate: 0.218 (±0.019) ct s-1 Peak XRT rate: 0.29 (±0.07) ct s-1 RASS PSPC 3-σ upper limit: 0.03 ct s-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.283 (±0.025) ct s-1 Peak XRT rate converted to PSPC: 0.38 (±0.09) ct s-1 Mean XRT flux: 5.9 (±0.5) ×10-12 erg cm-1s-1 Peak XRT flux: 7.8 (±1.8) ×10-12 erg cm-1s-1 Products: Light curve | Spectrum | Enhanced position | Expected serendipitous sources: ~4.20×10-3 [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 7 sources have been found in the XRT data. 3 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err901	Detection Flag2	Dist from MAXI pos	Exposure	Notes	Vizier
1 [details]	13h 18m 15.03s199.56263°	+06° 55′ 21.5″6.92263°	2.2′′ *	Good	1.9′′	4.9 ks	The source is brighter than the RASS limit.
Mean XRT rate: 0.218 (±0.019) ct s-1 Peak XRT rate: 0.29 (±0.07) ct s-1 RASS PSPC 3-σ upper limit: 0.03 ct s-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.283 (±0.025) ct s-1 Peak XRT rate converted to PSPC: 0.38 (±0.09) ct s-1 Mean XRT flux: 5.9 (±0.5) ×10-12 erg cm-1s-1 Peak XRT flux: 7.8 (±1.8) ×10-12 erg cm-1s-1 Products: Light curve | Spectrum | Enhanced position | Expected serendipitous sources: ~4.20×10-3 [What is this?]
2 [details]	13h 18m 40.88s199.67032°	+07° 05′ 34.8″7.09300°	3.8′′ *	Good	12.0′	1.2 ks	A SIMBAD object matches this source's position: (Show) [VV2010c] J131840.9+070533, 1.6′′ away
Mean XRT rate: 1.3 (±0.5) ×10-2 ct s-1 Peak XRT rate: 1.3 (±0.5) ×10-2 ct s-1 RASS PSPC 3-σ upper limit: 0.05 ct s-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.013 (±0.005) ct s-1 Peak XRT rate converted to PSPC: 0.013 (±0.005) ct s-1 Mean XRT flux: 3.9 (±1.4) ×10-13 erg cm-1s-1 Peak XRT flux: 3.9 (±1.4) ×10-13 erg cm-1s-1 Products: Light curve | Spectrum | Enhanced position | Expected serendipitous sources: ~0.4 [What is this?]
3 [details]	13h 18m 07.77s199.53236°	+06° 52′ 03.9″6.86774°	5.3′′	Good	3.8′	5.1 ks
Mean XRT rate: 3.1 (±1.0) ×10-3 ct s-1 Peak XRT rate: 3.1 (±1.0) ×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 (±0.7) ×10-3 ct s-1 Peak XRT rate converted to PSPC: 2.0 (±0.7) ×10-3 ct s-1 Mean XRT flux: 1.5 (±0.5) ×10-13 erg cm-1s-1 Peak XRT flux: 1.5 (±0.5) ×10-13 erg cm-1s-1 Products: Light curve | Spectrum | Expected serendipitous sources: ~1.2 [What is this?]
4 [details]	13h 17m 53.34s199.47226°	+06° 51′ 21.5″6.85598°	5.8′′	Good	6.7′	5.0 ks	A SIMBAD object matches this source's position: (Show) SDSSCGB 66382.4, 2.8′′ away
Mean XRT rate: 1.8 (±0.9) ×10-3 ct s-1 Peak XRT rate: 1.8 (±0.9) ×10-3 ct s-1 RASS PSPC 3-σ upper limit: 0.05 ct s-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 5.8 (±2.7) ×10-3 ct s-1 Peak XRT rate converted to PSPC: 5.8 (±2.7) ×10-3 ct s-1 Mean XRT flux: 4.1 (±1.9) ×10-14 erg cm-1s-1 Peak XRT flux: 4.1 (±1.9) ×10-14 erg cm-1s-1 Products: Light curve | Spectrum | Expected serendipitous sources: ~2.5 [What is this?]
5 [details]	13h 18m 16.32s199.56800°	+06° 48′ 39.8″6.81105°	5.0′′	Good	6.7′	4.4 ks
Mean XRT rate: 1.7 (±0.9) ×10-3 ct s-1 Peak XRT rate: 1.7 (±0.9) ×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: 2.1 (±1.2) ×10-3 ct s-1 Peak XRT rate converted to PSPC: 2.1 (±1.2) ×10-3 ct s-1 Mean XRT flux: 6 (±3) ×10-14 erg cm-1s-1 Peak XRT flux: 6 (±3) ×10-14 erg cm-1s-1 Products: Light curve | Spectrum | Expected serendipitous sources: ~2.7 [What is this?]
6 [details]	13h 17m 32.96s199.38735°	+06° 55′ 14.4″6.92067°	6.0′′	Reasonable	10.5′	4.5 ks
Mean XRT rate: 1.6 (±0.9) ×10-3 ct s-1 Peak XRT rate: 1.6 (±0.9) ×10-3 ct s-1 RASS PSPC 3-σ upper limit: 0.07 ct s-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 3.0 (±1.6) ×10-4 ct s-1 Peak XRT rate converted to PSPC: 3.0 (±1.6) ×10-4 ct s-1 Mean XRT flux: 6 (±3) ×10-14 erg cm-1s-1 Peak XRT flux: 6 (±3) ×10-14 erg cm-1s-1 Products: Light curve | Spectrum | Expected serendipitous sources: ~2.9 [What is this?]
7 [details]	13h 17m 16.67s199.31944°	+06° 54′ 41.1″6.91142°	6.6′′	Poor	14.5′	3.5 ks	A SIMBAD object matches this source's position: (Show) NVSS J131716+065447, 5.2′′ 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) Mean XRT rate converted to PSPC: 1.6 (+0.9, -0.7) ×10-3 ct s-1 Peak XRT rate converted to PSPC: 1.6 (+0.9, -0.7) ×10-3 ct s-1 Mean XRT flux: 8 (+5, -3) ×10-14 erg cm-1s-1 Peak XRT flux: 8 (+5, -3) ×10-14 erg cm-1s-1 Products: Light curve | Spectrum | Expected serendipitous sources: ~2.9 [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

FITS image.

Exposure map

FITS exposure map.

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