NGC1068 LST1 analysis Cycle I DanielMorcuende
Contents
Analysis of LST-1 NGC 1068 data from observation cycle I[edit]
General information[edit]
- Name of the source: NGC 1068
- Brief description of the source:
- Object type : AGN, Seyfert II galaxy
- Redshift (z) : 0.0037
- Other relevant information: neutrino excess found by IceCube (https://doi.org/10.1126/science.abg3395)
- RA, Dec in deg (ICRS): 40.66962153, -0.0132943
- Analysis by Name (Institute - email)
- Daniel Morcuende (IAA-CSIC, dmorcuende@iaa.es)
- José Manuel Gavilán (IAA-CSIC)
Data-taking information[edit]
There are a total of 124 runs from 2023-08-19 to 2024-02-10
- Dates of data-taking:
- Date (time of observation h)
- ZD range (deg): 25-65
- Date (time of observation h)
Dataset after good quality selection[edit]
Number of runs (% is w.r.t. those in Sky region & zenith range):
In the requested Sky region and range of dates: 128
+ zenith in requested range: 127
+ NSB in requested range: 127 (100.0%)
+ FF and pedestal interleaved events are present: 125 (98.4%)
+ Stable pointing: 123 (96.9%)
+ dR/dI fit P-value ok: 123 (96.9%)
+ dR/dI LS periodogram ok: 118 (92.9%)
+ dR/dI index ok: 94 (74.0%)
+ dR/dI rate ok: 60 (47.2%)
+ intensity threshold ok: 60 (47.2%)
Total observation time: 15.46 h
Total number of runs: 60 (in 16 nights) Total observation time: 15.46 hours '2023-09-22': [14696, 14697, 14698, 14699], '2023-10-06': [14927, 14929], '2023-11-03': [15256, 15257, 15258, 15259], '2023-11-04': [15263], '2023-11-10': [15387, 15388, 15389], '2023-11-12': [15474, 15475, 15476, 15477], '2023-11-16': [15615, 15616, 15618], '2023-11-17': [15656, 15657, 15658, 15659, 15672, 15673, 15674, 15675], '2023-11-18': [15706, 15707, 15708, 15709, 15710, 15713], '2023-12-08': [15883, 15884, 15886, 15887, 15888], '2023-12-09': [15917, 15918, 15919, 15920], '2023-12-14': [16085, 16086, 16087], '2023-12-17': [16195, 16198], '2024-01-29': [16427, 16428, 16429], '2024-01-31': [16445, 16446, 16447, 16448], '2024-02-10': [16660, 16661, 16662, 16663],
Analysis information[edit]
- lstchain v0.10
- source-independent analysis
- Gammapy v1.1
Monte Carlo information[edit]
Closest declination line towards La Palma latitude (28.8 deg)
20240131_allsky_v0.10.5_all_dec_base/dec_931
DL1 data[edit]
Standard DL1b files produced by LSTOSA (lstchain v0.10, tailcut 8-4 with cleaning based on pedestal RMS, dynamic cleaning)
/fefs/aswg/data/real/DL1/YYYYMMDD/v0.10/tailcut84/dl1_LST-1.Run?????.h5
Random forest[edit]
Models:
/fefs/aswg/data/models/AllSky/20240131_allsky_v0.10.5_all_dec_base/dec_931
DL2[edit]
Files:
/fefs/aswg/workspace/daniel.morcuende/data/real/DL2/NGC1068
IRF and DL3 data selection[edit]
DL3 files:
/fefs/aswg/workspace/daniel.morcuende/data/real/DL3/NGC1068/20240131_allsky_v0.10.5_all_dec_base/dec_931/gh_eff_0.7_th_cont_0.7
- IRF linear interpolation
- intensity > 50 p.e.
- gammaness energy-dependent cuts with 70% efficiency
- theta energy-dependent cuts 70% efficiency
High-level analysis[edit]
- Science Tool: Gammapy 1.1
- point-like IRF, 1D analysis
Analysis Results[edit]
Theta2 plot[edit]
No detection
Energy range: 0.0 - 0.2 TeV Excess: -5324.0; Off: 450085 Gamma rate: -6.0 events / minute Off rate: 510.9 events / minute alpha (backg normalization): 1.00 Li & Ma Significance: 0.0 standard deviations
Energy range: 0.2 - 1000000.0 TeV Excess: 14.0; Off: 3798 Gamma rate: 0.0 events / minute Off rate: 4.3 events / minute alpha (backg normalization): 0.33 Li & Ma Significance: 0.3 standard deviations
Significance map[edit]
Excess map[edit]
Spectral results[edit]
- Fermi-LAT 3FHL and 3FGL SED shown.
- Spectral model plotted corresponds to the Fermi-LAT data, extended to VHE.
- For comparison 125-h long MAGIC results (V. A. Acciari et al 2019 ApJ 883 135)
Light curve[edit]
