ICECUBEJ1744.0+3858: Swift observation summary

Mission:	IceCube
Neutrino RA:	266.000°
Neutrino Dec:	+38.970°
Neutrino Err:	0.5 deg
T0:	2025-07-06 13:14:40 UT
Galactic:	64.48° +29.17°
Galactic N_H:	3.21× 10²⁰ cm^-2

Sun distance:	115.69°
Sun angle:	10.68 [hr] (East of Sun)
Moon distance:	70.25°
Visibility of this field.
First slew:	2025-07-07 02:18:28 UT
First observation:	2025-07-07 02:17:56 UT
First analysis:	2025-07-07 09:01:07 UT

About tiled field analysis.

So far 10 fields have been scheduled for observations. Data are available and processed for 10 of these.

19914 — 559 s of cleaned data taken between 2025-07-07 02:18:25 and 2025-07-07 02:30:09
19915 — 446 s of cleaned data taken between 2025-07-07 02:30:12 and 2025-07-07 02:38:46
19916 — 478 s of cleaned data taken between 2025-07-07 05:12:37 and 2025-07-07 05:22:27
19917 — 491 s of cleaned data taken between 2025-07-07 05:22:30 and 2025-07-07 05:31:05
19918 — 398 s of cleaned data taken between 2025-07-07 03:39:53 and 2025-07-07 03:48:29
19919 — 586 s of cleaned data taken between 2025-07-07 02:38:49 and 2025-07-07 03:53:48
19920 — 476 s of cleaned data taken between 2025-07-07 03:53:53 and 2025-07-07 04:02:31
19921 — 453 s of cleaned data taken between 2025-07-07 04:02:32 and 2025-07-07 04:11:11
19922 — 576 s of cleaned data taken between 2025-07-07 04:11:14 and 2025-07-07 05:36:20
19923 — 488 s of cleaned data taken between 2025-07-07 05:36:28 and 2025-07-07 05:45:07

Find an upper limit.

Sources found so far

So far 7 sources have been found in the XRT data. 4 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Rank³	Dist from IceCube pos	Exposure	Notes
1 [details]	17h 45m 45.66s266.44025°	+39° 01′ 22.5″39.02293°	6.2′′	Good	3 (U)	20.8′	935 s
Mean XRT rate: 1.7 (+0.6, -0.5) ×10^-2 ct s^-1 Peak XRT rate: 1.7 (+0.6, -0.5) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.01 ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.040 (+0.015, -0.012) ct s^-1 Peak XRT rate converted to PSPC: 0.040 (+0.015, -0.012) ×10^-2 ct s^-1 Mean XRT flux: 3.6 (+1.4, -1.1) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 3.6 (+1.4, -1.1) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum
2 [details]	17h 45m 54.04s266.47517°	+38° 52′ 50.0″38.88056°	5.8′′	Reasonable	3 (U)	22.8′	1.1 ks	This source may be affected by optical loading Matches SIMBAD source: HD 161815, 4.8″ away.
Mean XRT rate: 1.0 (+0.7, -0.5) ×10^-2 ct s^-1 Peak XRT rate: 1.0 (+0.7, -0.5) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 9.1×10^-3 ct s^-1 (PSPC count-rate) Products: Light curve
3 [details]	17h 42m 45.50s265.68958°	+38° 59′ 38.1″38.99391°	4.6′′	Good	3 (U)	14.5′	559 s	This source may be affected by optical loading
Mean XRT rate: 4.3 (±1.0) ×10^-2 ct s^-1 Peak XRT rate: 4.3 (±1.0) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.08 ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.095 (±0.023) ct s^-1 Peak XRT rate converted to PSPC: 0.095 (±0.023) ×10^-2 ct s^-1 Products: Light curve
4 [details]	17h 42m 43.69s265.68202°	+39° 00′ 19.9″39.00553°	9.3′′	Good	3 (U)	15.0′	559 s	This source may be affected by optical loading Matches SIMBAD source: B2 1741+39, 9.1″ away.
Mean XRT rate: 3.70 (+1.15, -0.96) ×10^-2 ct s^-1 Peak XRT rate: 3.70 (+1.15, -0.96) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 186.32 ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 2.2 (+0.7, -0.6) ct s^-1 Peak XRT rate converted to PSPC: 2.2 (+0.7, -0.6) ×10^-5 ct s^-1 Mean XRT flux: 2.9 (+0.9, -0.7) ×10^-9 erg cm^-1s^-1 Peak XRT flux: 2.9 (+0.9, -0.7) ×10^-9 erg cm^-1s^-1 Products: Light curve \| Spectrum
5 [details]	17h 42m 47.75s265.69897°	+39° 00′ 47.3″39.01314°	9.0′′	Poor	4 (K)	14.3′	559 s	Matches SIMBAD source: MCXC J1742.8+3900, 13.9″ away. Matches known X-ray source: 1RXS J174248.6+390027 (from ROSAT/RASSBSC), 22.6046819809179″ away.
Mean XRT rate: 1.7 (+0.8, -0.6) ×10^-2 ct s^-1 Peak XRT rate: 1.7 (+0.8, -0.6) ×10^-2 ct s^-1 -1.27 σ above the catalogued flux from ROSAT/RASSBSC. RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.031 (+0.014, -0.011) ct s^-1 Peak XRT rate converted to PSPC: 0.031 (+0.014, -0.011) ×10^-2 ct s^-1 Mean XRT flux: 4.5 (+2.0, -1.6) ×10^-12 erg cm^-1s^-1 Peak XRT flux: 4.5 (+2.0, -1.6) ×10^-12 erg cm^-1s^-1 Products: Light curve \| Spectrum
6 [details]	17h 42m 47.43s265.69762°	+38° 59′ 54.6″38.99849°	42.7′′ ^*	Poor	4 (K)	14.2′	559 s	This source may be affected by optical loading Matches known X-ray source: 1RXS J174248.6+390027 (from ROSAT/RASSBSC), 33.5990189636417″ away.
Mean XRT rate: 1.7 (+0.8, -0.6) ×10^-2 ct s^-1 Peak XRT rate: 1.7 (+0.8, -0.6) ×10^-2 ct s^-1 -1.81 σ above the catalogued flux from ROSAT/RASSBSC. RASS PSPC 3-σ upper limit: 0.0×10⁰ ct s^-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 0.0224 (+0.0102, -0.0079) ct s^-1 Peak XRT rate converted to PSPC: 0.0224 (+0.0102, -0.0079) ×10^-2 ct s^-1 Mean XRT flux: 1.3 (+0.6, -0.5) ×10^-11 erg cm^-1s^-1 Peak XRT flux: 1.3 (+0.6, -0.5) ×10^-11 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position
7 [details]	17h 42m 11.96s265.54984°	+38° 58′ 12.7″38.97021°	8.2′′	Poor	3 (U)	21.0′	1.1 ks
Mean XRT rate: undetermined ct s^-1 Peak XRT rate: undetermined ct s^-1 RASS PSPC 3-σ upper limit: 9.3×10^-3 ct s^-1 (PSPC count-rate) Products: Light curve

¹ Radius, 90% confidence.
² Indicates how likely the source is to be real. See the LSXPS documentation.

³ T=Transient Source, O=Outbursting known source, U=Uncatalogued X-ray source, K=Known X-ray source.

^* 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.