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.

Program Tracking
Proposal	71-506
Semester	P71: 20250401 - 20251001
Principal Investigator	Daniele Bjorn Malesani, Johan Peter Uldall Fynbo, DongXu
Programme	The new populations of gamma-ray bursts revealed by SVOM and Einstein Probe
Instrument	AL + NC + ST
Time Allocation	35h hard ToO, 35h SoftToO
Total Nights	70h
Type	RRM+ToO+SoftToO
Notes
Total Time Spent	19:00 (hh:mm)

Proposal	Date	Time	Type	Targets	Files	Comments	Status
71-506	2025-04-04	00:20	ToO	GRB250404A	ALId040064 - ALId040068	Clear skies and sub-arcsec seeing	Observed
71-506	2025-04-19	00:19	ToO	GRB250419A	ALId190079 - ALId190081		Observed
71-506	2025-04-22	00:59	ToO	GRB250419A	ALId220081 - ALId220090	Clear skies and sub-arcsec seeing. There appears to be a satellite streak in one of the exposures	Observed
71-506	2025-04-24	00:55	SoftToO	GRB250329B	ALId240556 - ALId240560	Observed with clear dark skies and seeing around 0.8".	Observed
71-506	2025-04-26	00:44	ToO	GRB250419A	ALId260104 - ALId260107	Dark, clear sky, good seeing.	Observed
71-506	2025-04-27	00:20	ToO	GRB250427A	ALId270137 - ALId270139	Clear skies and good seeing	Observed
71-506	2025-04-28	00:18	ToO	GRB250427A	ALId280148 - ALId280150	Clear skies, and the seeing was around 1.6".	Observed
71-506	2025-05-02	01:11	ToO	GRB250502A	ALIe020066 - ALIe020079	Target observed with clear skies and good seeing.	Observed
71-506	2025-05-06	00:58	ToO	GRB250506A	ALie060089-ALie060095	Clear skies, seeing ~0.7. Only 4 z'-band exposures done as the target was close to zenith.	Observed
71-506	2025-05-12	00:34	ToO	EP250512a	ALIe120020 - ALIe120030	Clear skies, and the seeing was around 1.2".	Observed
71-506	2025-05-15	00:28	ToO	GRB250424A	ALIe150051 - ALIe150053	Due to a light TCS crash couldn't obtain flats in the evening, will do them in the morning first run of the OB script aborted as telescope was not in focus second run was completed	Observed
71-506	2025-05-16	02:00	ToO	GOTO25cqo, GRB250516A, SP1045+378	ALIe160100 - ALIe160102, ALIe160109 - ALIe160121, ALIe160136 - ALIe160143	GOTO25cqo: completed the photometric OB attempted the spectroscopic OBs. I'm not very familiar with spectroscopic observations, so I don't know if I got anything useful. GRB250516A: Due to high wind speeds lower hatch had to be closed during some of the exposures, potentially causing vignetting	Observed
71-506	2025-05-25	01:05	ToO	GRB241029a	ALIe250166 - ALIe250171	Clear skies, and the seeing was around 1.0".	Observed
71-506	2025-05-29	00:38	ToO	GRB250521C_AT2025mgj	ALIe290035 - ALIe290042	Observed with clear skies. Started OB during twilight. Variable seeing between 1.1" and 0.8"	Observed
71-506	2025-05-31	01:14	ToO	GRB250521C_AT2025mgj, Feige34	ALIe310059 - ALIe310067, ALIe310075 - ALIe310078	Observed in full with clear skies and seeing around 1.0". Target started at airmass around 2.3 and ended at around 3.8. Standard was aborted and restarted once due to technical issue.	Observed
71-506	2025-06-10	00:41	ToO	GRB250610B	ALIf100004 - ALIf100011		Observed
71-506	2025-06-12	00:42	ToO	sb25061207	ALIf120075 - ALIf120093	Good seeing, thin clouds.	Observed
71-506	2025-06-13	01:35	ToO	sb25061207, GRB250612B	ALIf130076 - ALIf130087, ALIf130101 - ALIf130112		Observed
71-506	2025-06-17	00:30	ToO	GRB250617B	NCIf170473 - NCIf170492	Clear skies, and seeing was around 0.9".	Observed
71-506	2025-06-25	00:44	ToO	Targets observed GRB250625A	STIf250014 - STIf250021	Clear skies and seeing of around 0.5''. Due to the problems with StanCam's cooling, the images (especially in the R band) look quite overexposed. Hopefully the data is still of some use.	Observed
71-506	2025-06-26	01:08	ToO	GRB250625A	ALIf260109 - ALIf260120	Clear skies, and the seeing was oscillating between 0.8" and 1.2".	Observed
71-506	2025-07-02	00:29	ToO	GRB250702F		Observed at 0.6 arcsec dimm seeing. z-band exposures were cancelled. The reason for this is that when SOFIN is mounted on the NOT, we can not use the Z-band with StanCam, due to a red diode that causes light leak into the StanCam detector, making the z-band useless.	Observed
71-506	2025-07-03	00:37	ToO	EP250702a		Clear observing conditions.	Observed
71-506	2025-07-04	00:31	ToO	GRB250704B		Observations started with some delay, due to cloudy weather in the first couple of hours in the night.	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: March 07 2025