Gamma-ray Burst 250808A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Fri 08 Aug 25 18:25:34 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      47
TRIGGER_NUM:     776370317
GRB_RA:           59.433d {+03h 57m 44s} (J2000),
                  59.726d {+03h 58m 54s} (current),
                  58.861d {+03h 55m 27s} (1950)
GRB_DEC:         -15.867d {-15d 52' 00"} (J2000),
                 -15.795d {-15d 47' 39"} (current),
                 -16.009d {-16d 00' 33"} (1950)
GRB_ERROR:       16.28 [deg radius, statistical plus systematic]
GRB_INTEN:       59 [cnts/sec]
DATA_SIGNIF:     5.10 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        20895 TJD;   220 DOY;   25/08/08
GRB_TIME:        66312.48 SOD {18:25:12.48} UT
GRB_PHI:          88.00 [deg]
GRB_THETA:        35.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      0.79
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      96%  GRB
2nd_MOST_LIKELY:   2%  Generic Transient
DETECTORS:       0,1,0, 0,0,0, 0,0,0, 1,0,0, 0,0,
SUN_POSTN:       138.91d {+09h 15m 39s}  +15.90d {+15d 54' 06"}
SUN_DIST:         84.32 [deg]   Sun_angle= 5.3 [hr] (West of Sun)
MOON_POSTN:      312.84d {+20h 51m 22s}  -21.12d {-21d 07' 04"}
MOON_DIST:        99.36 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      208.17,-45.49 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       53.08,-35.47 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250808768/quicklook/glg_lc_medres34_bn250808768.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 211.42,-21.55 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Fri 08 Aug 25 18:25:49 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      57
TRIGGER_NUM:     776370317
GRB_RA:           61.710d {+04h 06m 50s} (J2000),
                  62.004d {+04h 08m 01s} (current),
                  61.136d {+04h 04m 33s} (1950)
GRB_DEC:         -15.150d {-15d 09' 00"} (J2000),
                 -15.083d {-15d 04' 57"} (current),
                 -15.283d {-15d 16' 58"} (1950)
GRB_ERROR:       7.65 [deg radius, statistical only]
DATA_SIGNIF:     6.80 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        20895 TJD;   220 DOY;   25/08/08
GRB_TIME:        66312.48 SOD {18:25:12.48} UT
GRB_PHI:          84.00 [deg]
GRB_THETA:        35.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4173 (Gnd S/W Version number)
SUN_POSTN:       138.91d {+09h 15m 39s}  +15.90d {+15d 54' 06"}
SUN_DIST:         82.01 [deg]   Sun_angle= 5.1 [hr] (West of Sun)
MOON_POSTN:      312.84d {+20h 51m 23s}  -21.12d {-21d 07' 02"}
MOON_DIST:       101.65 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      208.45,-43.19 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       55.91,-35.30 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250808768/quicklook/glg_lc_medres34_bn250808768.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_776370317.fits
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        In the LAT Field-of-view.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The LC_URL file will not be created/available until ~15 min after the trigger.  
COMMENTS:        The POS_MAP_URL file will not be created/available until ~1.5 min after the notice.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Fri 08 Aug 25 18:26:57 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      0
TRIGGER_NUM:     776370317
GRB_RA:           64.930d {+04h 19m 43s} (J2000),
                  65.222d {+04h 20m 53s} (current),
                  64.360d {+04h 17m 26s} (1950)
GRB_DEC:         -15.680d {-15d 40' 47"} (J2000),
                 -15.620d {-15d 37' 11"} (current),
                 -15.799d {-15d 47' 56"} (1950)
GRB_ERROR:       4.51 [deg radius, statistical only]
DATA_SIGNIF:     6.80 [sigma]
DATA_INTERVAL:   12.288 [sec]
GRB_DATE:        20895 TJD;   220 DOY;   25/08/08
GRB_TIME:        66312.48 SOD {18:25:12.48} UT
GRB_PHI:          79.00 [deg]
GRB_THETA:        34.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   41731 (Gnd S/W Version number)
SUN_POSTN:       138.91d {+09h 15m 39s}  +15.90d {+15d 54' 05"}
SUN_DIST:         79.26 [deg]   Sun_angle= 4.9 [hr] (West of Sun)
MOON_POSTN:      312.85d {+20h 51m 25s}  -21.11d {-21d 06' 49"}
MOON_DIST:       104.18 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      210.72,-40.54 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       59.50,-36.50 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250808768/quicklook/glg_lc_medres34_bn250808768.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_776370317.fits
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        In the LAT Field-of-view.  
COMMENTS:        This is likely a Long GRB.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The LC_URL file will not be created/available until ~15 min after the trigger.  
COMMENTS:        The POS_MAP_URL file will not be created/available until ~1.5 min after the notice.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Fri 08 Aug 25 18:35:29 UT
NOTICE_TYPE:     Fermi-GBM Final Position
RECORD_NUM:      0
TRIGGER_NUM:     776370317
GRB_RA:           62.810d {+04h 11m 14s} (J2000),
                  63.100d {+04h 12m 24s} (current),
                  62.244d {+04h 08m 59s} (1950)
GRB_DEC:         -16.780d {-16d 46' 47"} (J2000),
                 -16.715d {-16d 42' 54"} (current),
                 -16.908d {-16d 54' 29"} (1950)
GRB_ERROR:       7.13 [deg radius, statistical only]
GRB_DATE:        20895 TJD;   220 DOY;   25/08/08
GRB_TIME:        66312.48 SOD {18:25:12.48} UT
GRB_PHI:          83.00 [deg]
GRB_THETA:        33.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   41731 (Gnd S/W Version number)
SUN_POSTN:       138.92d {+09h 15m 41s}  +15.90d {+15d 53' 59"}
SUN_DIST:         81.55 [deg]   Sun_angle= 5.1 [hr] (West of Sun)
MOON_POSTN:      312.93d {+20h 51m 44s}  -21.09d {-21d 05' 13"}
MOON_DIST:       101.80 [deg]
MOON_ILLUM:      100 [%]
GAL_COORDS:      211.06,-42.84 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       56.72,-37.13 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250808768/quicklook/glg_lc_medres34_bn250808768.gif
LOC_URL:         http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250808768/quicklook/glg_locplot_all_bn250808768.png
COMMENTS:        Fermi-GBM Final Position.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The LC_URL file should be available by the time this FINAL notice is produced.  
COMMENTS:        This notice was generated completely by automated pipeline processing.  
COMMENTS:        In the LAT Field-of-view.  
COMMENTS:        This is likely a Long GRB.

GCN Circular #41296
The Fermi GBM team reports the detection of a likely LONG GRB
At 18:25:12 UT on 8 Aug 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250808A (trigger 776370317.484496 / 250808768).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 62.8, Dec = -16.8 (J2000 degrees, equivalent to J2000 04h 11m, -16d 48'), with a statistical uncertainty of 7.1 degrees.
The angle from the Fermi LAT boresight is 33.0 degrees.
The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250808768/quicklook/glg_skymap_all_bn250808768.png
The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250808768/quicklook/glg_healpix_all_bn250808768.fit
The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250808768/quicklook/glg_lc_medres34_bn250808768.gif
GCN Circular #41297
D. Adrien, D. Turpin, N. Dagoneau (CEA), S. Guillot (IRAP), report on behalf of the SVOM mission team:
At 2025-08-08T18:25:49 UTC (T0), SVOM/ECLAIRs triggered and located the gamma-ray burst GRB 250808A (SVOM burst-id sb25080803).
The following trigger information was received on the ground with low latency by the SVOM VHF Alert Network.
The burst was only detected by the Image Trigger (IMT), which produced a sequence of 2 alerts. IMT provided the alert with the best signal-to-noise-ratio in the image (SNR) of 7.44 in the [5-20] keV energy band over a time window of 163.84 seconds starting at 2025-08-08T18:23:46.
The localization of the best alert is R.A., Dec. 63.5525, -22.9041 degrees:
```
R.A. (J2000) = 4h14m12.61s
Dec. (J2000) = -22d54m14.75s
```
with a 90% confidence level (C.L.) radius of 10.55 arcmin (including systematic error of 2 arcmin added in quadrature).
The time and position are consistent with the Fermi/GBM GRB 250808A (Fermi GBM, GCN 41296).
This burst was also detected by SVOM/GRM with a significance of 8.20. Due to the detection significance being below the slew threshold, no immediate slew was performed on this burst. No X-ray observation could be performed by SVOM/MXT for the time being.No optical observation could be performed by SVOM/VT for the time being.
The Space-based multi-band astronomical Variable Objects Monitor (SVOM) is a China-France joint mission led by the Chinese National Space Administration (CNSA), French Space Agency (CNES), and the Chinese Academy of Sciences (CAS), which is dedicated to observing gamma-ray bursts and other transient phenomena in the energetic universe. SVOM/ECLAIRs was developed jointly by CNES, CEA-IRFU, CNRS-IRAP, CNRS-APC. SVOM/GRM was developed by the Institute of High Energy Physics (IHEP) of CAS. SVOM/MXT was developed jointly by CNES, CEA-IRFU, CNRS-IJCLab, University of Leicester, MPE.
The Burst Advocate (BA) on shift for this alert is Dylan ADRIEN: dylan.adrien@cea.fr. Please contact the BA by email if you require additional information.
GCN Circular #41300
P.A. Evans (U. Leicester), J.A. Kennea (PSU), E. Ambrosi (INAF-IASFPA) , A.P. Beardmore (U. Leicester), M.G. Bernardini (INAF-OAB), R. Brivio (INAF-OAB), D.N. Burrows (PSU), S. Campana (INAF-OAB), M. Capalbi (INAF-OAR), A. D'Ai (INAF-IASFPA), P. D'Avanzo (INAF-OAB), V. D'Elia (SSDC & INAF-OAR), S. Dichiara (PSU), M. Ferro (INAF-OAB), A. Melandri (INAF-OAR), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), M. Perri (SSDC & INAF-OAR), C. Salvaggio (INAF-OAB), T. Sbarrato (INAF-OAB), B. Sbarufatti (INAF-OAB), M.A. Williams (PSU) report on behalf of the Swift-XRT team:
Swift-XRT has performed follow-up observations of the SVOM/ECLAIRs-detected source GRB 250808A, collecting 1.7 ks of Photon Counting (PC) mode data between T0+3.7 ks and T0+5.6 ks after the trigger. A candidate counterpart has been found. The details of this source are:
Source 1 (SWIFT J041412.2-224923):
==================================
```
    RA (J2000.0):   63.5510  =	04h 14m 12.24s
    Dec (J2000.0):  -22.8231  =  -22d 49' 23.2"
    Error:	    3.9 (arcsec, radius, 90% confidence).
    Detect flag:    GOOD
    Distance:	    4.9 arcmin from the SVOM/ECLAIRs position.
    Mean rate:	    0.140 +/- 0.013 ct s^-1
    Mean flux:	    (4.58 +/- 0.43)e-12 erg cm^-2 s^-1
    Peak rate:	    0.204 +/- 0.046 ct s^-1
    Peak flux:	    (6.7 +/- 1.5)e-12 erg cm^-2 s^-1
    ECF:	    3.27e-11 erg cm^-2 ct^-1
		      assuming NH=1.35e+21 cm^-2, gamma=2.07
		      determined from a spectral fit.
    XMM UL:	    2.2e-12 erg cm^-2 s^-1, (0.3-10 keV)
		      so the source is 3.0-sigma above this 3-sigma upper limit.
    The source may be fading, at the 2.1-sigma level.
```
All fluxes are 0.3-10 keV, observed. For all flux conversions and comparisons with catalogues and upper limits from other missions, we assumed a power-law spectrum with NH=3x10^20 cm^-2 and photon index (Gamma)=1.7 unless otherwise stated.
The results of the XRT-team automatic analysis of the XRT observations, including a position-specific upper limit calculator, are available at https://www.swift.ac.uk/SVOM/SVOM_FIELD00027.
This circular is an official product of the Swift-XRT team.
GCN Circular #41301
A. Holzmann Airasca (UniTrento and INFN Bari), S. Bala (USRA) and C. Meegan (UAH) report on behalf of the Fermi Gamma-ray Burst Monitor Team:
"At 18:25:12.48 UT on 08 August 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250808A (trigger 776370317/250808768). which was also detected by SVOM/ECLAIRs (D. Adrien et al. 2025, GCN 41297). The Fermi GBM on-ground location is consistent with the SVOM/ECLAIRs position.
The angle from the Fermi LAT boresight is 33 degrees.
The GBM light curve consists of a single variable emission episode with a duration (T90) of about 49 s (50-300 keV). The time-averaged spectrum from T0-6.1 to T0+51.2 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -1.1 +/- 0.2 and the cutoff energy, parameterized as Epeak, is 70 +/- 7 keV.
The event fluence (10-1000 keV) in this time interval is (2.7 +/- 0.2)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0+45 s in the 10-1000 keV band is 2.5 +/- 0.2 ph/s/cm^2.
A Band function fits the spectrum equally well with Epeak= 55 +/- 9 keV, alpha = -0.7 +/- 0.3 and beta = -2.5 +/- 0.3.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog: https://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html
For Fermi GBM data and info, please visit the official Fermi GBM Support Page: https://fermi.gsfc.nasa.gov/ssc/data/access/gbm/"
GCN Circular #41302
Antonio de Ugarte Postigo (LAM), Noémie Globus (UNAM), Jean-Grégoire Ducoin (CPPM), Alan M. Watson (UNAM), Jean-Luc Atteia (IRAP), Rosa L. Becerra (U Roma), Stéphane Basa (UAR Pytheas), William H. Lee (UNAM), Fredd Alvarez (UNAM), Camila Angulo (UNAM), Dalya Akl (NYUAD), Sarah Antier (OCA), Nathaniel R. Butler (ASU) , Damien Dornic (CPPM), Francis Fortin (IRAP), Leonardo García García (UNAM), Ramandeep Gill (UNAM), Kin Ocelotl López (UNAM), Diego López-Cámara (UNAM), Francesco Magnani (CPPM), Enrique Moreno Méndez (UNAM), Margarita Pereyra (UNAM), Ny Avo Rakotondrainibe (LAM), Benjamin Schneider (LAM), D. Adrien (CEA) and D. Turpin (CEA):
We imaged the field of the SVOM GRB 250808A (Adrien et al., GCN Circ. 41297) using the DDRAGO wide-field imager on the SVOM/COLIBRÍ (FM-GFT) telescope. We observed from 2025-08-09 11:11 to 11:50 UTC (from 16.8 to 17.4 hours after the trigger) and obtained 32x60 s of exposure in the i filter. The observations were carried out mostly during the astronomical twilight and with an average airmass ~ 2.7.
The data were reduced and coadded with the COLIBRÍ pipeline and analysed with STDWeb/STDPipe (Karpov 2025). The photometry was calibrated using nearby stars from the PanSTARRS DR1 catalog, is in the AB system, and is not corrected for Galactic extinction.
Within the full SVOM/ECLAIRs error circle we do not detect any new source down to a 5-sigma limiting magnitude of i > 21.4 mag. More specifically, within the error circle of the XRT afterglow (Evans et al. GCN Circ. 41300) we do not detect any significant optical counterpart down to the following 3-sigma limit:
i > 22.0 mag
We thank the staff of the Observatorio Astronómico Nacional on the Sierra de San Pedro Mártir and the COLIBRÍ and DDRAGO engineering teams.
COLIBRÍ is an astronomical observatory developed and operated jointly by France (AMU, CNES and CNRS) and Mexico (UNAM and SECIHTI). It is located at the Observatorio Astronómico Nacional on the Sierra de San Pedro Mártir, Baja California, Mexico.
GCN Circular #41305
A. Levan (Radboud U.), D. B. Malesani (DAWN/NBI and Radboud Univ.), I. F. Giudice (INAF/OACn), L. Izzo (INAF/OACn & DARK/NBI), A. L. Thakur (INAF-IAPS), N. R. Tanvir (U. Leicester), G. Corcoran (UCD), A. de Ugarte Postigo (LAM), A. Martin-Carrillo (UCD), A. Saccardi (CEA/Irfu), M. De Pasquale (U. Messina), D. Hartmann (Clemson U.) report on behalf of the Stargate collaboration:
We observed the field of SVOM/ECLAIRs GRB 250808A (Adrien et al., GCN 41297) using ESO VLT UT3 (Melipal) equipped with the X-shooter instrument, starting at 9 August 08:56 UT, approximately 14.5 hr after the burst trigger. A sequence of 1x120s (r band) and 5x60s (z band) images was obtained with the acquisition camera. Comparison to z-band images obtained with the Legacy Survey shows a new source within the Swift/XRT localisation region (Evans et al., GCN 41300) at coordinates:
```
RA(J2000) = 04:14:12.39
Dec(J2000) = -22:49:23.5
```
The source has an approximate magnitude of z ~ 21.8 mag (AB). We suggest this is the optical counterpart of GRB 250808A. We notice that this source is also detected in the r-band acquisition image.
We also note the presence of a very faint (r = 24.28 mag, z = 23.73 mag) catalogued object in the Legacy Survey DR10 just below the afterglow position. We propose this source to be the host galaxy of GRB 250808A.
We acknowledge excellent support from the ESO observing staff in Paranal, in particular Cecilia Bustos, Rodrigo Palominos, and Rob van Holstein.

GCN Circular #41307
V.Lipunov, E.Gorbovskoy, A.Kuznetsov, K.Zhirkov, I.Panchenko, N.Tiurina, P.Balanutsa, V.Topolev, D.Vlasenko, G.Antipov, A.Sankovich, Yu.Tselik, Ya.Kechin, V.Senik, A.Chasovnikov, K.Labsina, I. Gorbunov (Lomonosov MSU), O.Gress, N.Budnev (ISU), C.Francile, F. Podesta, R.Podesta, E. Gonzalez (Observatorio Astronomico Felix Aguilar (OAFA), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), A.Sosnovskij (CrAO), A. Gabovich, V.Yurkov (Blagoveschensk Educational StateUniversity), D.Buckley (SAAO), R.Rebolo (The Instituto de Astrofisica de Canarias), L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory)
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 GRB 250808A ( Fermi GBM team, GCN 41296) errorbox 18725 sec after notice time and 18749 sec after trigger time at 2025-08-08 23:37:41 UT, with upper limit up to 16.5 mag. The observations began at zenith distance = 79 deg. The sun altitude is -22.7 deg.
The galactic latitude b = -42 deg., longitude l = 211 deg.
Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2964051
We obtain a following upper limits.

Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________

   18779 | 2025-08-08 23:37:41 |   MASTER-Kislovodsk | (03h 36m 57.03s , -13d 48m 11.9s) |   C |    60 | 15.0 |        
   20676 | 2025-08-09 00:09:18 |   MASTER-Kislovodsk | (03h 54m 25.00s , -15d 41m 27.8s) |   C |    60 | 12.1 |        
   21637 | 2025-08-09 00:25:19 |   MASTER-Kislovodsk | (04h 11m 41.65s , -22d 41m 02.9s) |   C |    60 | 15.0 |        
   21697 | 2025-08-09 00:25:19 |   MASTER-Kislovodsk | (04h 11m 41.66s , -22d 41m 03.0s) |   C |   180 | 15.9 |  Coadd 
   21720 | 2025-08-09 00:26:42 |   MASTER-Kislovodsk | (04h 11m 34.93s , -22d 42m 01.6s) |   C |    60 | 15.3 |        
   21806 | 2025-08-09 00:28:08 |   MASTER-Kislovodsk | (04h 11m 43.16s , -22d 41m 36.9s) |   C |    60 | 15.7 |        
   21889 | 2025-08-09 00:29:31 |   MASTER-Kislovodsk | (04h 11m 39.40s , -22d 40m 19.5s) |   C |    60 | 15.8 |        
   21949 | 2025-08-09 00:29:31 |   MASTER-Kislovodsk | (04h 11m 39.42s , -22d 40m 19.8s) |   C |   180 | 16.4 |  Coadd 
   21979 | 2025-08-09 00:31:01 |   MASTER-Kislovodsk | (04h 11m 39.61s , -22d 41m 49.4s) |   C |    60 | 15.8 |        
   22063 | 2025-08-09 00:32:25 |   MASTER-Kislovodsk | (04h 11m 43.91s , -22d 40m 21.3s) |   C |    60 | 15.7 |        
   22151 | 2025-08-09 00:33:53 |   MASTER-Kislovodsk | (04h 11m 36.12s , -22d 40m 49.1s) |   C |    60 | 15.9 |        
   22211 | 2025-08-09 00:33:53 |   MASTER-Kislovodsk | (04h 11m 36.14s , -22d 40m 49.5s) |   C |   180 | 16.5 |  Coadd 
   22232 | 2025-08-09 00:35:14 |   MASTER-Kislovodsk | (04h 11m 37.37s , -22d 39m 46.9s) |   C |    60 | 15.9 |        
   22315 | 2025-08-09 00:36:37 |   MASTER-Kislovodsk | (04h 11m 43.55s , -22d 40m 44.4s) |   C |    60 | 15.8 |        
   22398 | 2025-08-09 00:38:00 |   MASTER-Kislovodsk | (04h 11m 38.67s , -22d 41m 40.3s) |   C |    60 | 16.0 |        
   22482 | 2025-08-09 00:39:24 |   MASTER-Kislovodsk | (04h 11m 43.85s , -22d 41m 24.6s) |   C |    60 | 15.9 |        
   22752 | 2025-08-09 00:43:54 |   MASTER-Kislovodsk | (04h 11m 43.50s , -22d 39m 33.3s) |   C |    60 | 15.7 |        
   22834 | 2025-08-09 00:45:16 |   MASTER-Kislovodsk | (04h 11m 39.63s , -22d 40m 21.8s) |   C |    60 | 15.7 |        
   22894 | 2025-08-09 00:45:16 |   MASTER-Kislovodsk | (04h 11m 39.63s , -22d 40m 21.9s) |   C |   180 | 16.1 |  Coadd 
   22919 | 2025-08-09 00:46:41 |   MASTER-Kislovodsk | (04h 11m 37.85s , -22d 39m 18.0s) |   C |    60 | 15.7 |        
   23011 | 2025-08-09 00:48:13 |   MASTER-Kislovodsk | (04h 11m 44.98s , -22d 40m 14.4s) |   C |    60 | 15.2 |        
   23093 | 2025-08-09 00:49:35 |   MASTER-Kislovodsk | (04h 11m 39.09s , -22d 41m 10.2s) |   C |    60 | 15.0 |        
   23153 | 2025-08-09 00:49:35 |   MASTER-Kislovodsk | (04h 11m 39.09s , -22d 41m 10.2s) |   C |   180 | 15.9 |  Coadd 
   23199 | 2025-08-09 00:51:21 |   MASTER-Kislovodsk | (04h 11m 44.24s , -22d 40m 39.2s) |   C |    60 | 15.4 |        
   23283 | 2025-08-09 00:52:45 |   MASTER-Kislovodsk | (04h 11m 42.44s , -22d 39m 17.6s) |   C |    60 | 15.4 |        
   23381 | 2025-08-09 00:54:23 |   MASTER-Kislovodsk | (04h 11m 42.54s , -22d 40m 34.8s) |   C |    60 | 15.0 |        
   23467 | 2025-08-09 00:55:49 |   MASTER-Kislovodsk | (04h 11m 45.72s , -22d 38m 58.4s) |   C |    60 | 14.3 |        
   24214 | 2025-08-09 01:08:16 |   MASTER-Kislovodsk | (04h 11m 48.73s , -22d 39m 27.6s) |   C |    60 | 13.7 |        
   24300 | 2025-08-09 01:09:42 |   MASTER-Kislovodsk | (03h 36m 57.33s , -13d 44m 50.9s) |   C |    60 | 12.9 |

Filter C is a clear (unfiltred) band.
The observation and reduction will continue. The message may be cited.

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Jochen Greiner, last update: 09-Aug-2025 [Disclaimer]