TITLE: GCN CIRCULAR
NUMBER: 34926
SUBJECT: New Swift-BAT/GUANO and IceCube Notices Available via GCN Kafka
DATE: 23/11/01 15:36:15 GMT
FROM: Judith Racusin at NASA/GSFC <judith.racusin(a)nasa.gov>
Swift-BAT/GUANO, IceCube, and GCN teams report:
The Swift-BAT/GUANO, IceCube, and GCN teams are pleased to announce the availability of new GCN notice types via the new GCN in JSON format. JSON format notices can be streamed via Kafka (https://gcn.nasa.gov/quickstart). These new notice types are not available via GCN Classic.
Swift-BAT/GUANO: gcn.notices.swift.bat.guano (https://gcn.nasa.gov/missions/swift)
- Summary: GUANO is a ground-based analysis of data from Swift BAT, significantly enhancing the sensitivity and sky area covered as compared to Swift's onboard triggering.
- Occurence Rate: The Swift/BAT-GUANO notices occur at a rate of 50 times per year.
- Time Delay: The post-event processing and communication of alert is distributed to GCN within 10 minutes to 5 hours of detection, depending on data downlink method and space-to-ground communications resource availability.
- Notice Type: The new Swift/BAT-GUANO notice type (gcn.notices.swift.bat.guano) provides timestamps, sky locations, durations, and other supplementary information on gamma-ray transients discovered through this system, to enable prompt follow-up by observers and other instruments. The 'initial' notice distributed for any detection will not include localization information. In the majority of cases later 'update' notices will follow with a localization attached. ~1/4 of GUANO bursts will have arcminute-scale localizations, distributed in the form [RA, Dec, Error] the remainder will be more poorly localized and may be distributed as HEALPix maps.
IceCube LVK Neutrino Track Search:gcn.notices.icecube.lvk_nu_track_search (https://gcn.nasa.gov/missions/icecube)
- Summary: IceCube is a is a cubic-kilometer Cherenkov particle detector deployed in the Antarctic ice beneath the Amundsen-Scott South Pole Station. IceCube detects neutrinos by observing the light produced by relativistic charged particles created by neutrino interactions in or near the instrumented volume of ice.
- Occurrence Rate: The LVK Nu Track Search notices are triggered by LIGO/Virgo/KAGRA alerts and occur at the same rate of these alerts, searching for neutrino signals from both significant and low significance LVK alerts.
- Time Delay: Neutrino searches are performed in a +/- 500 second time window about the LVK alert, and Nu Track search results are generally available within ~1000 seconds of the LVK GW event time.
- Notice Type: The new LVK Nu Track Search notice type (gcn.notices.icecube.lvk_nu_track_search) provides results from realtime searches for coincident neutrino signals from all LIGO/Virgo/KAGRA gravitational-wave alerts, using a realtime muon neutrino track-like event selection and the sky maps from gravitational wave detectors. Search results will include neutrino directions for observed coincident events with the aim to identify multi-messenger transient sources and seed electromagnetic followup up observations.
Notice Schema and Examples: The JSON schema defining the notice format and examples can be viewed in the Schema Browser (https://gcn.nasa.gov/docs/schema/latest/gcn/notices) or the GCN schema repository (https://github.com/nasa-gcn/gcn-schema).
View this GCN Circular online at https://gcn.nasa.gov/circulars/34926.
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TITLE: GCN CIRCULAR
NUMBER: 34925
SUBJECT: Fermi trigger No 720498201: Global MASTER-Net observations report
DATE: 23/11/01 02:46:02 GMT
FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov(a)xray.sai.msu.ru>
V. Lipunov, V.Kornilov, E. Gorbovskoy, K. Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.Senik, D. Vlasenko,
G.Antipov, D.Zimnukhov, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D. Cheryasov, Ya.Kechin, Yu.Tselik, A. Sosnovskij
(Lomonosov Moscow State University, SAI, Physics Department),
R. Podesta, C.Lopez, F. Podesta, C.Francile
(Observatorio Astronomico Felix Aguilar OAFA),
R. Rebolo, M. Serra
(The Instituto de Astrofisica de Canarias),
D. Buckley
(South African Astronomical Observatory),
O.A. Gress, N.M. Budnev, O.Ershova
(Irkutsk State University, API),
L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez,
A.R.Corella, L.H.Rodriguez
(INAOE, Guillermo Haro Astrophysics Observatory),
A. Tlatov, D. Dormidontov
(Kislovodsk Solar Station of the Pulkovo Observatory),
V. Yurkov, A. Gabovich
(Blagoveschensk Educational State University)
MASTER-Kislovodsk robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB231101.10 (trigger No 720498201,09h 08m 14.40s , +13d 15m 36.0s, R=13.18) errorbox 90 sec after notice time and 123 sec after trigger time at 2023-11-01 02:25:20 UT, with upper limit up to 17.4 mag. Observations started at twilight. The observations began at zenith distance = 45 deg. The sun altitude is -14.9 deg.
MASTER-Tavrida robotic telescope located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the Fermi GRB231101.10 errorbox 308 sec after notice time and 341 sec after trigger time at 2023-11-01 02:28:58 UT, with upper limit up to 18.1 mag. The observations began at zenith distance = 38 deg. The sun altitude is -20.1 deg.
The galactic latitude b = 37 deg., longitude l = 217 deg.
Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/observ.php?id=2293558
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________
154 | 2023-11-01 02:25:20 | MASTER-Kislovodsk | (09h 42m 58.56s , +04d 46m 59.7s) | C | 60 | 17.3 |
236 | 2023-11-01 02:26:43 | MASTER-Kislovodsk | (08h 52m 53.45s , +12d 25m 15.9s) | C | 60 | 17.3 |
317 | 2023-11-01 02:28:03 | MASTER-Kislovodsk | (09h 08m 26.97s , +12d 23m 35.0s) | C | 60 | 17.2 |
372 | 2023-11-01 02:28:58 | MASTER-Tavrida | (08h 54m 24.41s , +10d 59m 50.1s) | C | 60 | 17.6 |
399 | 2023-11-01 02:29:25 | MASTER-Kislovodsk | (08h 57m 14.59s , +14d 19m 37.3s) | C | 60 | 17.3 |
444 | 2023-11-01 02:30:10 | MASTER-Tavrida | (08h 51m 26.54s , +09d 05m 37.5s) | C | 60 | 17.6 |
518 | 2023-11-01 02:31:24 | MASTER-Tavrida | (09h 09m 49.90s , +11d 00m 29.9s) | C | 60 | 17.6 |
591 | 2023-11-01 02:32:38 | MASTER-Tavrida | (09h 04m 15.19s , +07d 10m 19.4s) | C | 60 | 17.9 |
885 | 2023-11-01 02:37:31 | MASTER-Kislovodsk | (08h 49m 13.80s , +10d 31m 19.6s) | C | 60 | 17.2 |
966 | 2023-11-01 02:38:53 | MASTER-Kislovodsk | (08h 41m 29.96s , +14d 18m 20.2s) | C | 60 | 17.4 |
1046 | 2023-11-01 02:40:13 | MASTER-Kislovodsk | (08h 57m 14.79s , +14d 19m 34.6s) | C | 60 | 17.1 |
1112 | 2023-11-01 02:41:18 | MASTER-Tavrida | (08h 54m 26.42s , +10d 58m 53.5s) | C | 60 | 18.1 |
Filter C is a clear (unfiltred) band.
The observation and reduction will continue.
The message may be cited.
View this GCN Circular online at https://gcn.nasa.gov/circulars/34925.
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