P71-506: The new populations of gamma-ray bursts revealed by SVOM and Einstein Probe

PI: Daniele Bjorn Malesani, Johan Peter Uldall Fynbo, Dong Xu

ALFOSC/StanCam + NOTCam ToO program with override status

ToO triggers have override status.

The OB generator will be used to request all observations.
The OBs will automatically appear in the OB queue and OB generated scripts will be automatically placed in the directory ~/scripts/71-506/.

For the observer:

Go to the directory
cd ~/scripts/71-506
List the available scripts
ls -lrt
and execute the OB generated scripts requested.
If you cannot find the corresponding observing script, please (re-)compile it from the Queue interface.

In the case of NOTCam, make sure that differential skyflats are obtained for the camera and filter setup that is requested.

Remember to fill the ToO or SoftToO tracking logs of this program.

P71 tracking P72 tracking

Program Tracking

Proposal 71-506

Semester P73: 20260401 - 20261001

Principal Investigator Daniele Bjorn Malesani, Johan Peter Uldall Fynbo, Dong Xu

Programme The new populations of gamma-ray bursts revealed by SVOM and Einstein Probe

Instrument ALFOSC+NOTCAM

Time Allocation 35 hours ToO, rest as SoftToO

Total Nights 70h

Type ToO/SoftToO

Notes

Total Time Spent 23:33 (hh:mm)

Proposal Date Time Type Targets Files Comments Status

71-506 2026-04-02 00:27 SoftToO EP260321a, sp1036+433 ALJd020047 - ALJd020061 Observed with good seeing, ~1", but high air-dust-level, SNR of quickspecs seemed good. Data shared with another program. Observed

71-506 2026-04-12 00:48 SoftToO EP260321A, hd84937 ALJd120094 - 106 OK Observed

71-506 2026-04-15 00:55 ToO GOTO26djh, hd84937, EP260321A ALJd150059 - ALJd150061, ALJd150064 - ALJd150076 Both targets and standard observed with clear skies and good seeing. Observed

71-506 2026-04-16 00:28 ToO GOTO26djh ALJd160146 - ALJd160148 Observed under thin clouds and seeing 1.1"-1.3" Observed

71-506 2026-04-20 00:45 ToO GOTO26djh ALJd200154 - ALJd200158 Observed with clear sky and seeing about 1.1'' Observed

71-506 2026-04-21 00:15 ToO GRB260421B ALJd210125-ALJd210126 GRB appears to be there. Observed after moonset as per request. Observed

71-506 2026-04-23 01:18 ToO GRB260310A ALJd230116 - ALJd230128 Observed under clear skies and sub-arcsec seeing. Observed

71-506 2026-04-27 00:35 ToO GRB260310A ALJd270199 - ALJd270203 Observed with clear skies and seeing around 0.5". Observed

71-506 2026-04-30 01:13 ToO EP260321A, hd84937 ALJd300160 - ALJd300169, ALJd300173 - ALJd300176 Observed with thin clouds some of the integration time, and clear skies at other parts of the integration time. Seeing was around 1.2" Observed

71-506 2026-05-09 02:47 ToO GRB260307B, GRB260509A, BD+33_2642 ALJe090055 - ALJe090063, ALJe090073 - ALJe090080, ALJe090092 - ALJe090100, ALJe090101 - ALJe090104 Through out all the observations seeing stayed below or around 1". Thin clouds present Observed

71-506 2026-05-11 01:18 SoftToO GRB260310A ALJe110135 - ALJe110147 good seeing, clear skies Observed

71-506 2026-05-12 00:33 ToO GRB260511B ALJe120080 - ALJe120091 Observed shortly after twilight. Few high, thin clouds, good seeing Observed

71-506 2026-05-15 01:28 ToO GRB260515A ALJe150052 - ALJe150059, ALJe150113 - ALJe150121 Observed under clear skies and good seeing. Observed

71-506 2026-05-16 00:42 SoftToO GRB251129A ALJe160121 - ALJe160125 Observed under clear skies and varying seeing, at times exceeding the seeing constraints. Observed

71-506 2026-05-28 01:04 ToO GRB260527A ALJe280059 - ALJe280083 Started observations during twilight, great seeing and clear skies. Observed

71-506 2026-05-28 01:09 SoftToO GRB251129A ALJe280106 - ALJe280117 Clear skies and great seeing Observed

71-506 2026-06-03 00:36 ToO GRB260303A ALJf030124 - ALJf030132 Observed under clear skies and seeing around 1.5". Observed

71-506 2026-06-06 00:18 ToO GRB260604C ALJf060195 - ALJf060197 Observed with clear sky and seeing about 1.0'' Observed

71-506 2026-06-08 00:37 ToO GRB260604C ALJf080072 - ALJf080079 Observed after pointing tests. Clear skies and seeing >1.7" Observed

71-506 2026-06-11 00:19 ToO GRB260610B ALJf110184 - ALJf110186 Observed right after twilight. Clear skies and sub-arcsecond seeing. Observed

71-506 2026-06-15 01:28 SoftToO GRB251129A ALJf150080 - ALJf150085, ALJf150091 - ALJf150102 Observed with clear skies and seeing <1" Observed

71-506 2026-06-16 01:01 SoftToO GRB260310A ALJf160101-ALJf160110 Target observed with clear skies and seeing <1" Observed

71-506 2026-06-17 01:14 ToO GRB260610B ALJf170079 - ALJf170087, ALJf170130 - ALJf170132 Observed

71-506 2026-06-19 00:24 ToO GRB260619A ALJf190213 - ALJf190216 Observed with clear sky and seeing about 0.7'' - 0.8'' Observed

71-506 2026-06-21 00:46 ToO GRB260610B ALJf210057 - ALJf210064 Observed with clear sky and seeing about 0.5'' Observed

71-506 2026-06-23 00:29 ToO GRB260610B ALJf230119 - ALJf230123 Clear skies, sub-arc seeing. Observed

71-506 2026-06-25 00:36 ToO GRB260610B ALJf250139 - ALJf250147 Observed with clear skies and seeing around 0.9". Observed

The above information is collected from the ToO/Mon reports that have been created by the observer.

Should any of the observations have been carried out using the OB system, you will find additional information HERE

Last modified: April 19 2026