General information

Name of the source: NGC 1275
Brief description of the source:

- Object type : FR-I Radio Galaxy + Spiral galaxy (in interaction)

- RA: 3 19 48.16 (hh mm ss), Dec: +41 30 42.1088 (dd mm ss)

NGC 1275 data analysis

Related analysis pages

Analysis_NGC1275_Dec_2022_w_IRF_interpolation_Priyadarshi (Dec 2022, source-independent, IRF interpolation, energy-dependent cuts. Dec 20 flare for ATel https://www.astronomerstelegram.org/?read=15819 )

Analysis_NGC1275_Dec_2022_source_dep_Nozaki (Dec 20 Flare, source-dependent, IRF interpolation, energy-dependent cuts for ATel https://www.astronomerstelegram.org/?read=15819 )

Cycle I (including major flare Dec 2022)

Mireia

Producer: Mireia Nievas Rosillo <mnievas@iac.es>

Data acquisition

old datacheck notebook

(below some key points from Abelardo's old datacheck selection notebook, only showing those relevant for data selection)

ZD and AZ distributions

NSB vs moon altitude and vs run number

Rate of cosmics

Rate of pulses above a given pulse size

NSB after all cuts

new data_select notebook

Data selection

(old selection using Abelardo's old datacheck notebook)

204 wobble runs for the selected source (out of 246)
Observation time: 53.56 hours (out of 65.53 hours)
(most data in Perseus-MA mode, shared with IC310, some runs in NGC1275 pointing mode)
(moon data is removed)

1 : 2022-12-20 : [11522, 11528, 11529, 11530, 11531, 11532, 11522, 11528, 11529, 11530, 11531, 11532]
2 : 2022-12-21 : [11546, 11547, 11548, 11549, 11550]
3 : 2022-12-22 : [11566, 11568, 11569, 11570, 11571, 11572, 11573, 11574, 11566, 11568, 11569, 11570, 11571, 11572, 11573, 11574]
4 : 2022-12-23 : [11595, 11596, 11597, 11598, 11599, 11600]
5 : 2023-01-13 : [11618, 11619]
6 : 2023-01-14 : [11641, 11642, 11643, 11644, 11641, 11642, 11643, 11644]
7 : 2023-01-15 : [11660, 11661, 11662, 11663, 11660, 11661, 11662, 11663]
8 : 2023-08-15 : [13935, 13936, 13937, 13938, 13939, 13940, 13941, 13942, 13943, 13944]
9 : 2023-08-17 : [13987, 13988, 13989, 13990, 13991, 13992, 13993, 13994, 13995, 13996]
10 : 2023-08-18 : [14020, 14021, 14022, 14023]
11 : 2023-08-20 : [14069, 14070, 14071, 14072, 14073]
12 : 2023-08-21 : [14093, 14094, 14095, 14096, 14097, 14098, 14099, 14100]
13 : 2023-09-11 : [14258]
14 : 2023-09-16 : [14456]
15 : 2023-09-18 : [14495]
16 : 2023-09-19 : [14590]
17 : 2023-09-20 : [14623, 14624, 14625, 14626]
18 : 2023-09-21 : [14668, 14669]
19 : 2023-09-22 : [14700, 14701, 14702, 14703, 14704]
20 : 2023-09-23 : [14712, 14713, 14715, 14718, 14719, 14720, 14721]
21 : 2023-09-24 : [14731, 14732, 14733, 14736, 14737, 14738]
22 : 2023-10-09 : [15010, 15011, 15012, 15013, 15014, 15015, 15016, 15017]
23 : 2023-10-10 : [15039, 15040]
24 : 2023-10-11 : [15070, 15071, 15072, 15073, 15074]
25 : 2023-10-12 : [15117, 15118, 15119, 15120]
26 : 2023-11-08 : [15321, 15322, 15323, 15324, 15325, 15326, 15327]
27 : 2023-11-10 : [15401, 15402, 15403, 15404, 15405, 15406, 15407]
28 : 2023-11-11 : [15436, 15437, 15438]
29 : 2023-11-12 : [15470, 15471, 15472, 15473]
30 : 2023-11-16 : [15627, 15628, 15629, 15630, 15631]
31 : 2023-11-17 : [15660, 15661, 15662, 15663, 15664]
32 : 2023-11-19 : [15739, 15740, 15741]
33 : 2023-12-01 : [15786, 15787, 15788]
34 : 2023-12-08 : [15889, 15890, 15891, 15892, 15893]
35 : 2024-01-29 : [16423, 16424, 16425, 16426]
36 : 2024-01-30 : [16438, 16439, 16440, 16441, 16442]
37 : 2024-02-02 : [16492, 16493, 16494, 16495, 16496, 16497, 16498, 16499, 16500, 16501, 16502, 16503]

(new selection using news data_select notebook, 07.02.2024)

Total number of runs: 142 (in 34 nights) out of 246 Total observation time: 38.47 hours out of 65.53 h

20221220 [11522 11528 11529 11530 11531 11532]
20221221 [11546 11547 11548 11549 11550]
20221222 [11566 11568 11569 11570 11571 11572 11573 11574]
20221223 [11595 11596 11597 11598 11599 11600]
20230113 [11618 11619]
20230114 [11641 11642 11643 11644]
20230115 [11660 11661 11662 11663]
20230817 [13987 13988 13989 13990 13991 13992 13993 13994 13995 13996]
20230911 [14258]
20230916 [14456]
20230918 [14495]
20230919 [14590]
20230920 [14623 14624 14625]
20230921 [14668]
20230922 [14700 14701 14702 14703 14704]
20230923 [14712 14713 14715 14718 14719 14720 14721]
20230924 [14730 14731 14732 14733 14736 14737 14738]
20231006 [14930 14931]
20231007 [14954 14955 14956 14957 14958]
20231010 [15040]
20231012 [15117 15118 15119]
20231108 [15321 15322 15323 15324 15325 15326 15327]
20231110 [15401 15402 15403 15404 15405 15406 15407]
20231111 [15436 15437 15438]
20231112 [15470 15471 15472 15473]
20231113 [15517]
20231116 [15627 15628 15629 15630 15631]
20231117 [15660 15661 15662 15663 15664]
20231119 [15739 15740]
20231201 [15786 15787 15788]
20231208 [15889 15890 15891 15892 15893]
20240129 [16423 16424 16425 16426]
20240130 [16438 16439 16440 16441 16442]
20240202 [16492 16493 16495 16496 16497 16498 16500 16503]

Analysis details

Software and analysis notebook:

Files (inc. provence): /fefs/aswg/workspace/mireia.nievas/NGC1275
Pipeline: /fefs/aswg/workspace/mireia.nievas/NGC1275/NGC1275_to_DL3.ipynb
lstchain: v0.10.5 originally, v0.10.7 now.
gammapy: 1.1
ctapipe: 0.19.2
astropy: 5.3.4

Source:

Coordinates: RA=49.95066663, DEC=41.5116969 (solved with astropy's SkyCoord / CDS name resolver)
Closest (chosen) dec track: 48.22 deg.
Cleaning: default, tail-cuts 8-4.
Analysis type: source-independent
IRFs: point-like, energy-dependent gammaness/theta2 cuts

Starting points: