July 2024 - vsnet-grb-info - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-grb-info 34859] GRB 240730C: AstroSat CZTI detection of a long burst
by GCN Circulars 01 Aug '24

01 Aug '24

TITLE: GCN CIRCULAR NUMBER: 36993 SUBJECT: GRB 240730C: AstroSat CZTI detection of a long burst DATE: 24/07/31 22:07:07 GMT FROM: Gaurav Waratkar at IIT Bombay <gauravwaratkar(a)iitb.ac.in> A. Dasgupta (BITS Pilani, Hyderabad), S. Srijan (IITB), G. Waratkar (IITB), J. Joshi (IUCAA), A. Vibhute (IUCAA), V. Bhalerao (IITB), D. Bhattacharya (Ashoka University/IUCAA), A. R. Rao (IUCAA/TIFR), and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration: Analysis of AstroSat CZTI data with the CIFT framework (Sharma et al., 2021, JApA, 42, 73) showed the detection of a long-duration GRB 240730C which was also detected by Konus/WIND (TrigID 2052170822). Inspection of INTEGRAL/SPI-ACS data also showed the detection of the burst. The source was detected in the CZT detectors in the 20-200 keV energy range. The light curve peaks at 2024-07-30 19:40:34.5 UTC. The measured peak count rate associated with the burst is 99 (+38, -9) counts/s above the background in the combined data of all quadrants, with a total of 990 (+222, -239) counts. The local mean background count rate was 289 (+3, -4) counts/s. Using cumulative rates, we measure a T90 of 16 (+5, -2) s. It was also clearly detected in the CsI anticoincidence (Veto) detector in the 100-500 keV energy range. The light curve peaks at 2024-07-30 19:40:38.4 UTC. The measured peak count rate is 541 (+72, -51) counts/s above the background in the combined Veto data of all quadrants, with a total of 4838 (+562, -640) counts. The local mean background count rate was 1235 (+10, -10) counts/s. We measure a T90 of 19 (+1, -1) s from the cumulative Veto light curve. CZTI is built by a TIFR-led consortium of institutes across India, including VSSC, URSC, IUCAA, SAC, and PRL. The Indian Space Research Organisation funded, managed, and facilitated the project. CZTI GRB detections are reported regularly on the payload site at: http://astrosat.iucaa.in/czti/?q=grb View this GCN Circular online at https://gcn.nasa.gov/circulars/36993. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 34858] GRB 240731A: Fermi GBM Final Localization
by GCN Circulars 01 Aug '24

01 Aug '24

TITLE: GCN CIRCULAR NUMBER: 36992 SUBJECT: GRB 240731A: Fermi GBM Final Localization DATE: 24/07/31 20:44:01 GMT FROM: Vidushi Sharma at NASA GSFC/UMBC <vidushi.sharma(a)nasa.gov> The Fermi GBM team reports the detection of a likely LONG GRB, which was also detected by AstroSat (Srijan et al. 2024, GCN 36989) and INTEGRAL SPI ACS trigger 10826. "At 14:20:12.45 UT on 31 July 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240731A (trigger 744128417/240731597). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 8.65, Dec = -46.27 (J2000 degrees, equivalent to J2000 0h 34m, -46d 16'), with a statistical uncertainty of 6.55 degrees. The angle from the Fermi LAT boresight is 58 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240731597/… The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240731597/… The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240731597/…" View this GCN Circular online at https://gcn.nasa.gov/circulars/36992. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 34857] Fermi trigger No 744128417: Global MASTER-Net observations report
by GCN Circulars 01 Aug '24

01 Aug '24

TITLE: GCN CIRCULAR NUMBER: 36991 SUBJECT: Fermi trigger No 744128417: Global MASTER-Net observations report DATE: 24/07/31 20:31:15 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-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB240731.60 (trigger No 744128417,00h 34m 36.00s , -46d 16m 12.0s, R=6.55) errorbox 15869 sec after notice time and 15891 sec after trigger time at 2024-07-31 18:45:04 UT, with upper limit up to 19.3 mag. The observations began at zenith distance = 78 deg. The sun altitude is -34.6 deg. The galactic latitude b = -71 deg., longitude l = 311 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2547291 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 15922 | 2024-07-31 18:45:04 | MASTER-SAAO | (00h 13m 25.27s , -50d 09m 46.8s) | C | 60 | 18.8 | 16001 | 2024-07-31 18:46:23 | MASTER-SAAO | (00h 25m 51.10s , -50d 10m 08.0s) | C | 60 | 18.9 | 16080 | 2024-07-31 18:47:42 | MASTER-SAAO | (00h 12m 49.83s , -48d 16m 31.0s) | C | 60 | 18.9 | 16160 | 2024-07-31 18:49:02 | MASTER-SAAO | (00h 14m 02.96s , -52d 03m 43.4s) | C | 60 | 19.0 | 16239 | 2024-07-31 18:50:21 | MASTER-SAAO | (00h 27m 05.93s , -52d 04m 43.2s) | C | 60 | 19.1 | 16568 | 2024-07-31 18:55:50 | MASTER-SAAO | (00h 38m 43.31s , -52d 04m 40.0s) | C | 60 | 18.9 | 16647 | 2024-07-31 18:57:09 | MASTER-SAAO | (00h 12m 10.43s , -46d 23m 26.3s) | C | 60 | 18.7 | 16727 | 2024-07-31 18:58:29 | MASTER-SAAO | (00h 40m 37.01s , -53d 56m 35.2s) | C | 60 | 18.7 | 16806 | 2024-07-31 18:59:48 | MASTER-SAAO | (00h 54m 20.79s , -53d 57m 13.0s) | C | 60 | 18.5 | 16891 | 2024-07-31 19:01:13 | MASTER-SAAO | (00h 13m 16.09s , -50d 11m 26.5s) | C | 60 | 19.0 | 16971 | 2024-07-31 19:02:33 | MASTER-SAAO | (00h 25m 53.25s , -50d 11m 11.1s) | C | 60 | 19.1 | 17050 | 2024-07-31 19:03:52 | MASTER-SAAO | (00h 12m 43.15s , -48d 15m 48.8s) | C | 60 | 19.1 | 17130 | 2024-07-31 19:05:12 | MASTER-SAAO | (00h 24m 45.96s , -48d 16m 51.9s) | C | 60 | 19.1 | 17209 | 2024-07-31 19:06:31 | MASTER-SAAO | (00h 14m 01.74s , -52d 03m 54.4s) | C | 60 | 19.2 | 17289 | 2024-07-31 19:07:51 | MASTER-SAAO | (00h 26m 59.91s , -52d 04m 12.9s) | C | 60 | 19.2 | 17368 | 2024-07-31 19:09:10 | MASTER-SAAO | (00h 37m 09.28s , -50d 10m 04.1s) | C | 60 | 19.2 | 17447 | 2024-07-31 19:10:29 | MASTER-SAAO | (00h 49m 35.45s , -50d 10m 46.4s) | C | 60 | 18.8 | 17526 | 2024-07-31 19:11:48 | MASTER-SAAO | (00h 38m 50.06s , -52d 04m 47.2s) | C | 60 | 19.1 | 17606 | 2024-07-31 19:13:08 | MASTER-SAAO | (00h 51m 49.90s , -52d 02m 45.4s) | C | 60 | 19.0 | 17685 | 2024-07-31 19:14:27 | MASTER-SAAO | (00h 12m 09.83s , -46d 23m 31.4s) | C | 60 | 18.9 | 17764 | 2024-07-31 19:15:46 | MASTER-SAAO | (00h 23m 49.77s , -46d 21m 50.2s) | C | 60 | 18.9 | 17844 | 2024-07-31 19:17:06 | MASTER-SAAO | (00h 40m 34.95s , -53d 57m 59.1s) | C | 60 | 18.8 | 17923 | 2024-07-31 19:18:25 | MASTER-SAAO | (00h 54m 13.87s , -53d 56m 37.4s) | C | 60 | 18.9 | 18002 | 2024-07-31 19:19:44 | MASTER-SAAO | (00h 13m 21.42s , -50d 10m 48.1s) | C | 60 | 19.1 | 18082 | 2024-07-31 19:21:04 | MASTER-SAAO | (00h 25m 46.22s , -50d 11m 33.4s) | C | 60 | 19.3 | 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/36991. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 34856] Fermi trigger No 744083370: Global MASTER-Net observations report
by GCN Circulars 01 Aug '24

01 Aug '24

TITLE: GCN CIRCULAR NUMBER: 36990 SUBJECT: Fermi trigger No 744083370: Global MASTER-Net observations report DATE: 24/07/31 20:30:49 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-Tavrida robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the Fermi GRB240731.08 (trigger No 744083370,10h 25m 52.80s , +33d 57m 00.0s, R=7.3) errorbox 64257 sec after notice time and 64262 sec after trigger time at 2024-07-31 19:40:28 UT, with upper limit up to 17.5 mag. The observations began at zenith distance = 81 deg. The sun altitude is -21.3 deg. The galactic latitude b = 59 deg., longitude l = 192 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2546590 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 64293 | 2024-07-31 19:40:28 | MASTER-Tavrida | (10h 37m 12.36s , +38d 34m 56.5s) | C | 60 | 17.4 | 64370 | 2024-07-31 19:41:45 | MASTER-Tavrida | (10h 54m 01.42s , +35d 59m 11.0s) | C | 60 | 17.0 | 64445 | 2024-07-31 19:43:00 | MASTER-Tavrida | (10h 52m 12.10s , +37d 17m 13.5s) | C | 60 | 17.4 | 64522 | 2024-07-31 19:44:17 | MASTER-Tavrida | (10h 35m 36.15s , +39d 52m 33.0s) | C | 60 | 17.3 | 64598 | 2024-07-31 19:45:33 | MASTER-Tavrida | (10h 50m 30.29s , +38d 34m 20.7s) | C | 60 | 17.4 | 64761 | 2024-07-31 19:48:17 | MASTER-Tavrida | (10h 49m 11.05s , +39d 53m 20.9s) | C | 60 | 17.5 | 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/36990. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 34855] GRB 240731A: AstroSat CZTI detection
by GCN Circulars 01 Aug '24

01 Aug '24

TITLE: GCN CIRCULAR NUMBER: 36989 SUBJECT: GRB 240731A: AstroSat CZTI detection DATE: 24/07/31 19:41:44 GMT FROM: Gaurav Waratkar at IIT Bombay <gauravwaratkar(a)iitb.ac.in> S. Srijan (IITB), A. Dasgupta (BITS Pilani, Hyderabad), G. Waratkar (IITB), J. Joshi (IUCAA), A. Vibhute (IUCAA), V. Bhalerao (IITB), D. Bhattacharya (Ashoka University/IUCAA), A. R. Rao (IUCAA/TIFR), and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration: Analysis of AstroSat CZTI data with the CIFT framework (Sharma et al., 2021, JApA, 42, 73) showed the detection of GRB 240731A which was also detected by Fermi/GBM (Trigger 744128417) and INTEGRAL/SPI-ACS (Trigger 10826). The source was detected in the CsI anticoincidence (Veto) detector in the 100-500 keV energy range. The light curve peaks at 2024-07-31 14:20:13.3 UTC. The measured peak count rate is 364 (+70, -74) counts/s above the background in the combined Veto data of all quadrants, with a total of 672 (+315, -330) counts. The local mean background count rate was 1305 (+13, -14) counts/s. We measure a T90 of 3.4 (+2.9, -2.4) s from the cumulative Veto light curve. CZTI is built by a TIFR-led consortium of institutes across India, including VSSC, URSC, IUCAA, SAC, and PRL. The Indian Space Research Organisation funded, managed, and facilitated the project. CZTI GRB detections are reported regularly on the payload site at: http://astrosat.iucaa.in/czti/?q=grb View this GCN Circular online at https://gcn.nasa.gov/circulars/36989. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 34854] GRB 240730A: Osservatorio Astronomico Nastro Verde upper limit
by GCN Circulars 01 Aug '24

01 Aug '24

TITLE: GCN CIRCULAR NUMBER: 36988 SUBJECT: GRB 240730A: Osservatorio Astronomico Nastro Verde upper limit DATE: 24/07/31 19:31:53 GMT FROM: Nello Ruocco at Osservatorio Nastro Verde - Sorrento (Naples) - Italy - MPC Code C82 <osservatorionastroverde(a)gmail.com> Nello Ruocco at Osservatorio Nastro Verde - Sorrento (Naples) - Italy in a large collaboration with: M.G. Dainotti (National Astronomical Observatory of Japan), Y. Niino (Tokyo University, Institute of Astronomy), K. Kalinowski (Aarhus University, Department of Physics and Astronomy), B. De Simone (Universita' degli Studi Di Salerno) report: We image the field of GRB 240730A (Trigger 1245636 S. B. Cenko (GSFC), P. A. Evans (U Leicester), R. A. J. Eyles-Ferris (U Leicester), K. L. Page (U Leicester) and D. M. Palmer (LANL) GCN Circular 36976) with telescope of Nastro Verde Observatory - Sorrento (Naples), Italy. Member of: AAVSO - American Association of Variable Star Observers. UAI/SSV - Unione Astrofili Italiani/sezione stelle variabili. AstroCampania Associazione The observations started at 22:08 UT of 2024/07/30, after about 14.20 hours after the GRB trigger, with clear sky, with principal telescope SC 0.35 f/10 with focal reduced + CCD Sbig ST10 XME I took 20 image of 60 sec each. All images are unfiltered, calibrated with masterdark and masterflat,stacked with Tycho Tracker software We have not detected any clearly visible sources, up to 19.5th magnitude with clear skies. Start T0+ End T0+ Rlim 22:08:20 UT 22:32:39 UT 19.5 We did not found any optical counterpart in the error box of the XRTcandidate. Magnitudes were estimated with the Gaia DR2 cat. and are not corrected for galactic dust extinction. The message may be cited. View this GCN Circular online at https://gcn.nasa.gov/circulars/36988. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 34853] GCN Announcement: Circulars are Now Available via Kafka, Heartbeat Kafka Topic, and Schema Release v4.1.0
by GCN Announcements 01 Aug '24

01 Aug '24

The GCN Team is pleased to announce new features on https://gcn.nasa.gov: Stream Circulars over Kafka in JSON format on the topic gcn.circulars. Add Circulars to your existing Kafka streaming codes or generated via the Start Streaming GCN Notices interface (https://gcn.nasa.gov/quickstart) GCN Heartbeat Kafka Topic (gcn.heartbeat) broadcasts a test message approximately once a second that can be used to test your Kafka connection. https://gcn.nasa.gov/docs/faq#how-can-i-tell-that-my-kafka-client-is-working Schema v4.1.0 includes the following updates: - Circulars schema (https://gcn.nasa.gov/docs/schema/v4.1.0/gcn/circulars.schema.json) - id property (from the Event core schema) in Einstein Probe Notices (https://gcn.nasa.gov/docs/schema/v4.1.0/gcn/notices/einstein_probe/wxt/aler…) - Pointing core schema changed from ra and dec to ra_pointing and dec_pointing to remove ambiguity with source position (https://gcn.nasa.gov/docs/schema/v4.1.0/gcn/notices/core/Pointing.schema.js…) For more details on this new feature and an archive of GCN news and announcements, see https://gcn.nasa.gov/news. For questions, issues, or bug reports, please contact us via: - Contact form: https://gcn.nasa.gov/contact - GitHub issue tracker: https://github.com/nasa-gcn/gcn.nasa.gov/issues --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 34852] GRB240730A: BOOTES-5/JGT early optical upper limit
by GCN Circulars 31 Jul '24

31 Jul '24

TITLE: GCN CIRCULAR NUMBER: 36987 SUBJECT: GRB240730A: BOOTES-5/JGT early optical upper limit DATE: 24/07/31 04:48:14 GMT FROM: Alberto Castro-Tirado at Inst.de Astro. de Andalucia <ajct(a)iaa.es> S. Guziy, E. Fernandez-Garcia, I. Perez-Garcia, M.D. Caballero-Garcia, R. Sanchez-Ramirez, S.-Y. Wu and A. J. Castro-Tirado (IAA-CSIC, Granada), Y.-D. Hu (INAF-OAB), D. Hiriart and W. H. Lee (UNAM), C. J. Perez del Pulgar (UMA), I. M. Carrasco-Garcia (SMA) and I. H. Park (SKKU), on behalf of a larger collaboration, report: Following the detection of GRB 240730A by Swift (Cenko et al. GCNC 36976), the BOOTES-5/JGT 0.6m robotic telescope at Observatorio Astronomico Nacional in San Pedro Martir (Mexico) automatically observed the GRB location starting on Jul. 30, 07:53:50 UT (~ 104 s after trigger). No new optical source is detected on the co-added images (57 x 1 s, clear-filter) within the enhanced Swift/XRT error box (Evans et al. GCNC 36977) down to 18.7 mag. which is consistent with reports from UVOT (Kuin et al., GCNC 36978), KAIT (Zheng et al., GCNC 36980) and MASTER (Lipunov et al. GCNC 36983). We thank the staff at Observatorio Astronomico Nacional in San Pedro Martir for their excellent support. View this GCN Circular online at https://gcn.nasa.gov/circulars/36987. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 34851] Fermi Gamma-ray Burst Monitor trigger 744061103/240730818 is not a GRB
by GCN Circulars 31 Jul '24

31 Jul '24

TITLE: GCN CIRCULAR NUMBER: 36986 SUBJECT: Fermi Gamma-ray Burst Monitor trigger 744061103/240730818 is not a GRB DATE: 24/07/30 21:11:52 GMT FROM: Sarah Dalessi at UAH <sd0104(a)uah.edu> S. Dalessi (UAH) reports on behalf of the Fermi Gamma-ray Burst Monitor Team: "The Fermi Gamma-ray Burst Monitor (GBM) trigger 744061103/240730818 at 19:38:18.37 UT on 30 July 2024, tentatively classified as a GRB, is in fact not due to a GRB. This trigger is likely due to solar flare." View this GCN Circular online at https://gcn.nasa.gov/circulars/36986. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 34850] Fermi GRB 240730B: Global MASTER-Net observations report
by GCN Circulars 31 Jul '24

31 Jul '24

TITLE: GCN CIRCULAR NUMBER: 36985 SUBJECT: Fermi GRB 240730B: Global MASTER-Net observations report DATE: 24/07/30 20:30:44 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-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB 240730B ( Fermi GBM team, GCN 36984) errorbox 576 sec after notice time and 588 sec after trigger time at 2024-07-30 19:48:06 UT, with upper limit up to 19.2 mag. The observations began at zenith distance = 82 deg. The sun altitude is -48.0 deg. The galactic latitude b = 80 deg., longitude l = 10 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2546199 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 618 | 2024-07-30 19:48:06 | MASTER-SAAO | (13h 29m 10.06s , +23d 17m 14.3s) | C | 60 | 18.6 | 678 | 2024-07-30 19:48:06 | MASTER-SAAO | (13h 29m 10.06s , +23d 17m 14.4s) | C | 180 | 19.2 | Coadd 697 | 2024-07-30 19:49:25 | MASTER-SAAO | (13h 29m 09.53s , +23d 17m 20.0s) | C | 60 | 18.5 | 776 | 2024-07-30 19:50:44 | MASTER-SAAO | (13h 29m 09.12s , +23d 17m 24.9s) | C | 60 | 18.5 | 855 | 2024-07-30 19:52:03 | MASTER-SAAO | (13h 29m 08.65s , +23d 17m 31.0s) | C | 60 | 18.6 | 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/36985. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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