P70-507: 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/70-507/.

For the observer:

Go to the directory
cd ~/scripts/70-507
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 tracking log of this program.

Program Tracking
Proposal	70-507
Semester	P70: 20241001 - 20250401
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	85h ALFOSC + 5h NOTCam, 55h hard ToO, follow-up as SoftToO
Total Nights	9
Type	ToO+SoftToO
Notes	Override. Soft triggers during Nordic service or Technical nights
Total Time Spent	45:24 (hh:mm)

Proposal	Date	Time	Type	Targets	Files	Comments	Status
70-507	2024-10-01	00:39	ToO	grb241002	ALHj010332 - ALHj010339	I was unable to identify the counterpart in the raw frames so I did not move on to spectroscopy.	Observed
70-507	2024-10-18	00:48	ToO	GRB241018a	ALHj180133 - ALHj180144	Target observed with clear skies and sub-arcsecond seeing.	Observed
70-507	2024-10-24	01:32	ToO	GRB241025A, HD19445	ALHj240181 - ALHj240193	Observed with clear sky and seeing better than 1 arcsec.	Observed
70-507	2024-10-25	01:02	ToO	GRB241025A	STHj250016 - STHj250026	Observed with clear sky and seeing around 1-2 arcsec.	Observed
70-507	2024-10-26	00:00	ToO	GRB241025A	ALHj260157 - ALHj260157	Target was attempted but bad weather forced me to abort it	Failed
70-507	2024-10-29	00:18	ToO	GRB241025a	ALHj290047 - ALHj290049	Observed with clear skies and seeing around 1.1 arcsec	Observed
70-507	2024-10-30	00:55	ToO	GRB241025a	ALHj300090 - ALHj300094	I did not notice a target in the indicated spot in the raw frames, but there were some other sources not visible in the finding chart. Seeing was slightly sub-arcsecond, ~0.9''.	Observed
70-507	2024-10-31	00:24	ToO	GRB241029A	ALHj310125 - ALHj310128	There is a faint source in the indicated spot. Seeing was ~0.65'' during the observation.	Observed
70-507	2024-11-01	00:33	ToO	GRB241029A	ALHk010091 - ALHk010095	Clear skies, seeing around 0.6 arcsec	Observed
70-507	2024-11-02	00:53	ToO	GRB241030A	ALHk020079 - ALHk020086	Thin cloud cover at the beginning of the observation, cleared up after the first exposure. Average seeing around 1 arcsec.	Observed
70-507	2024-11-03	01:28	ToO	GRB241029A, GRB241030A	ALHk030069 - ALHk030076	Thin clouds ans sub-arcsec seeing	Observed
70-507	2024-11-05	00:53	ToO	GRB241104A	ALHk050163 - ALHk050171	Apparently, there was no distinguishable source.	Observed
70-507	2024-11-13	00:14	ToO	grb241113a	ALHk130104 - ALHk130108	Observed in clear skies with seeing around 1.0"	Observed
70-507	2024-11-28	00:38	ToO	GRB241128A	ALHk280046 - ALHk280053	Observed target in clear skies with seeing around 2.3"	Observed
70-507	2024-12-08	00:18	ToO	GRB241209a	ALHl080069 - ALHl080071		Observed
70-507	2024-12-17	01:43	ToO	GRB241217A,GRB241218A	NCHl170242 - NCHl170259,STHl170021 - STHl170029,STHl170030 - STHl170037	Struggling with clouds, some of the J-band images of GRB241217A suffer from clouds.	Observed
70-507	2024-12-28	00:46	ToO	GRB241228A GRB241228B	ALHl280097 - ALHl280104, 129-130	very bad seeing	Observed
70-507	2024-12-29	00:54	SoftToO	GRB241209B	ALHl290221 - ALHl290225		Observed
70-507	2024-12-29	00:24	ToO	GRB241229A	ALHl290226 - ALHl290229		Observed
70-507	2025-01-01	00:18	ToO	grb250101a	ALIa010056 - ALIa010058	Seeing of around 1 arcsec, thin clouds.	Observed
70-507	2025-01-02	00:52	ToO	grb250101a	ALIa020071 - ALIa020079	Seeing around 0.6 arcsec, and clear skies	Observed
70-507	2025-01-03	01:47	ToO	grb250103a (+ sp0644+375)	ALIa030141 - ALIa030157	The target had peak altitude in the very start of night, but could not be observed right after sunset due to very heavy clouds. The target was observed when the conditions improved - thin clouds and sub-arc seeing. For the spectroscopy, the last 3 exposures were outside the requested LST range, due to above described conditions. Taken time-criticality into consideration, a decision was made to proceed with the observation in sub-optimal LST range.	Observed
70-507	2025-01-05	00:00	SoftToO	grb250101a	ALIa050003 - ALIa050011	Observed on NBI guaranteed time 70-802 voluntarily - therefore time set to 0. Reported as observed.	Observed
70-507	2025-01-06	00:41	ToO	GRB250106A	ALIa060237 - ALIa060246	good seeing	Observed
70-507	2025-01-08	00:41	ToO	GRB250108A	ALIa080175 - ALIa080184	Great night with excellent conditions. Low wind, humidity and good seeing. Target observed at the requested time of 3am (around 28 deg alt)	Observed
70-507	2025-01-12	00:36	ToO	EP250108a	ALIa120084 - ALIa120092	Seeing around 1.1 arcsec and clear skies	Observed
70-507	2025-01-28	02:35	ToO	GRB250128B, GRB250129A	ALIa280301 - ALIa280324	Observed GRB250128B for 30 minutes. Then, interrupted exposures to observe grb250129a After confirming optical counterpart, obtained 3x 1200s spectra of grb250129a. Followed by short r and z-band exposures of grb250129a. Finally, remaining exposures for GRB250128B were taken in twilight. In no exposure, could GRB250128B be identified.	Observed
70-507	2025-01-29	00:27	ToO	GRB250129A	ALIa290176 - ALIa290181	Observed with clear skies, variable seeing (1.0" - 1.5") and varying wind speed (13-15 m/s).	Observed
70-507	2025-01-30	00:14	ToO	GRB250129A	ALIa300150 - ALIa300152	Only the second part of the ToO at the end of the night was observed because there were high winds throughout the night coming from the SE, which was in the direction of the GRB. So could only point the telescope at the target once it had moved outside this range, which was towards the very end of the night.	Observed
70-507	2025-01-31	00:19	ToO	GRB250129A	ALIa310113 - ALIa310115	Clear skies and seeing around 1.6''. Could only observe it once due to high winds, the other OB was set as failed.	Observed
70-507	2025-02-01	00:38	ToO	GRB250129A	ALIb010125 - ALIb010127, ALIb010145 - ALIb010147	First observation was begun at 2:13 with seeing 1.4'' at the beginning of the exposure. The second observation was observed at 5:47. Humidity was ~70% at this time and had peaked right before. Seeing at the time of the second observation was 2.5-3''. The first "CTRL C" execution was aborted due to the target being behind the lower hatch which was closed please ignore it.	Observed
70-507	2025-02-02	00:24	ToO	GRB250129A	ALIb020143 - ALIb020146	Target observed with seeing 1.5''-1.9''.	Observed
70-507	2025-02-03	00:24	ToO	GRB250129A	ALIb030284 - ALIb030287	Observed program without any issues.	Observed
70-507	2025-02-04	00:25	ToO	GRB250129A	ALIb040123 - ALIb040126	Target was observed with good weather and seeing (~1 arcsecond).	Observed
70-507	2025-02-07	00:34	ToO	GRB250129A	ALIb070183 - ALIb07018	Observations were carried out under excellent seeing conditions (~0.5 arcsec). Moon illumination was around 75%	Observed
70-507	2025-02-09	00:41	ToO	GRB250129A	ALIb090074 - ALIb090079	Had to terminate during 76 due to low passing cloud. Continued after humidity dropped. Observed with seeing conditions below 1.0" for middle 3 frames and 1.3" for the first/last frames.	Observed
70-507	2025-02-15	00:55	ToO	GRB250215A	ALIb150175 - ALIb150179, ALIb150201 - ALIb150206	ToOs observed with clear skies and good seeing.	Observed
70-507	2025-02-16	01:04	ToO	GRB250215A	ALIb160132 - ALIb160145	Target observed in clear skies with seeing around 0.7". For g', i and i' flats please use the morning flats as the evening ones were taken too late.	Observed
70-507	2025-02-17	00:00	ToO	None	None	Could not open telescope all night due to high humidity and rain.	Failed
70-507	2025-02-18	00:46	ToO	GRB250215A	ALIb180280 - ALIb180287	Observed with clear skies and variable seeing due to high wind speeds. Lower hatch was closed for a short portion of the observation.	Observed
70-507	2025-02-19	00:37	ToO	GRB250219A	ALIb190358 - ALIb190365	Observed with good conditions. ToO was triggered during power outage and observed after a monitor target with strict airmass restrictions. Seeing was around 1.2"	Observed
70-507	2025-02-21	01:23	ToO	GRB250221A	ALIb210021 - ALIb210031	we had problems with finding a proper guiding star, which is why we had to abort the first observation runs. For the last run we had clear sky and everything ran smoothly.	Observed
70-507	2025-02-23	01:06	ToO	GRB250215A	ALIb230336 - ALIb230341	Observed with clear skies, sub-arcsec seeing. Target cannot be seen in individual exposures.	Observed
70-507	2025-02-26	01:06	ToO	ep250223, GRB260226A	ALIb260198 - ALIb260203, ALIb260261 - ALIb260270	Clear skies and seeing around 1.2''	Observed
70-507	2025-02-27	00:14	ToO	EP250223a	ALIb270072 - ALIb270074	Observed with clear skies and seeing between 1.5" and 1.8"	Observed
70-507	2025-03-06	00:00	ToO			All night lost due to snow on the dome.	Failed
70-507	2025-03-07	00:00	ToO	None	None	Missed due to bad weather.	Failed
70-507	2025-03-08	00:00	ToO	None	None	Target was very low in the sky and due to high winds the lower hatch was up. Images would've had over 50% vignetting.	Failed
70-507	2025-03-09	00:00	ToO	none	none	Target missed. High winds prevented us from opening the lower hatch	Failed
70-507	2025-03-10	00:41	ToO	EP250304a	ALIc100082 - ALIc100088	Target observed with a clear sky. Target was at low in the sky and seeing was poor.	Observed
70-507	2025-03-11	00:00	ToO	none	none	Target not attempted due to technical difficulties at the time of the window of possibility.	Failed
70-507	2025-03-14	01:25	ToO	GRB250314a, EP250304a	NCIc140451 - NCIc140468; NCIc140556 - NCIc140609	Targets observed in clear skies and with sub-arcsec seeing. The GRB burst was observed almost immediately after the trigger was sent.	Observed
70-507	2025-03-15	01:14	ToO	GRB250314a	NCIc150059 - NCIc150112	Observed with varying seeing 0.7-1.5''. Target was 7 deg from the moon and sky had partial thin cloud cover as such guiding was poor at times. Another target was not attempted due to cloud cover on the horizon.	Observed
70-507	2025-03-17	00:54	ToO	grb250317b, EP250304a	ALIc170184 - ALIc170185; ALIc170222 - ALIc170231	First target observed with no problem, in clear skies. The lower second target however was observed with seeing starting at 1.8" and then improving until 1.6" in the last images. Whilst these seeing values are within the constraints specified (<2"), they are still not great. Night was still clear.	Observed
70-507	2025-03-18	00:35	ToO	grb250317b	ALIc180112 - ALIc180114	Observed with thin clouds and seeing around 1.5 arcsec	Observed
70-507	2025-03-19	00:00	ToO			Missed target as telescope was closed all night due to high humidity and rain	Failed
70-507	2025-03-21	00:28	ToO	ep250321a	ALIc210116 - ALIc210121	Observed with clear skies and seeing below 1.0" First exposure of ep250321a was aborted due to unresponsive terminal. Soft ToO was not observed due to seeing limits.	Observed
70-507	2025-03-22	01:35	ToO	GRB250322A, ep250321a	ALIc220059 - ALIc220068 , ALIc220101 - ALIc220105	Observed both ToO's. Moderate wind speed of 12-14 m/s and variable seeing around 1.0"	Observed
70-507	2025-03-23	02:00	ToO	GRB250322A, ep250321a	ALIc230097 - ALIc230106 , ALIc230142 - ALIc230147	Tried to observe targets with highly variable wind gusts. Had to terminate OB's and wait until they were setting. Seeing was around 1.4"	Observed
70-507	2025-03-24	00:54	ToO	GRB250322A	ALIc240058 - ALIc240062	Observed throughout twilight with good seeing (between 1.3" - 1.0") and dark skies	Observed
70-507	2025-03-25	00:59	ToO	GRB250219A	ALIc250320 - ALIc250330	Observed with seeing 0.8-1.2''.	Observed
70-507	2025-03-27	01:30	ToO	GRB250327A, GRB250327B, SP1045+378	ALIc270089-105, 124-127	Clear sky, Ok seeing	Observed
70-507	2025-03-28	00:00	ToO			Telescope could not be opened due to having 100% humidity and subzero temperatures all night.	Failed
70-507	2025-03-29	00:00	ToO			Evacuated the telescope due to a snowstorm	Failed

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: September 30 2024