Difference between revisions of "M87 LST1Paper Mireia Analysis"
(→Main selection cuts) |
|||
| (One intermediate revision by the same user not shown) | |||
| Line 13: | Line 13: | ||
=== Data selection === | === Data selection === | ||
| − | Using | + | Using [https://github.com/cta-observatory/cta-lstchain/blob/master/notebooks/data_selection.ipynb Abelardo's datacheck-based data selection notebook] |
<div class="toccolours mw-collapsible mw-collapsed"> | <div class="toccolours mw-collapsible mw-collapsed"> | ||
| Line 31: | Line 31: | ||
* Remove data with '''high rate spikes''' in BOTH pulses>10 p.e. and pulses>30p.e. (3 runs wiped, high humidity of ~90% + lidar, although lidar transmission is >0.9) | * Remove data with '''high rate spikes''' in BOTH pulses>10 p.e. and pulses>30p.e. (3 runs wiped, high humidity of ~90% + lidar, although lidar transmission is >0.9) | ||
[[File:M87_LST1AGN_Runs_MeanZD_spikes10.png|500px]] | [[File:M87_LST1AGN_Runs_MeanZD_spikes10.png|500px]] | ||
| + | |||
[[File:M87_LST1AGN_Runs_MeanZD_spikes30.png|500px]] | [[File:M87_LST1AGN_Runs_MeanZD_spikes30.png|500px]] | ||
* A couple of runs with '''lower interleaved flatfield/pedestal rate''', but I don't put a filter yet. | * A couple of runs with '''lower interleaved flatfield/pedestal rate''', but I don't put a filter yet. | ||
Latest revision as of 12:51, 1 April 2022
Contents
General information[edit]
- Name of the source: M87
- Brief description of the source:
- Object type : AGN / Radiogal
- Redshift (z) : 0.00428 (16.1 +/- 1.2 Mpc)
- TeVCat entry: http://tevcat.uchicago.edu/?mode=1&showsrc=80
- Simbad: https://simbad.u-strasbg.fr/simbad/sim-basic?Ident=m87
- RA: 12 30 49.42338230 (hh mm ss) , Dec: +12 23 28.0438581 (dd mm ss)
- RA, Dec in deg (ICRS): 187.70593075958334, 12.391123293916666
Analysis by Mireia Nievas (mnievas[at]iac[dot]es)
Data selection[edit]
Using Abelardo's datacheck-based data selection notebook
Selection criteria details
Main selection cuts[edit]
- Wobble offset range : [0.3 - 0.5]. Skipped 1 run at Wobble ~ 0. Results in 60 runs (14.36h).
- AZ, Zenith distance cut: zd ] [0 - 50]: no runs skipped. Will use 20deg MC for ZD<30 and 40deg MC for ZD>30.
- Skip dates with missing flatfield tables: 20200618, 20200622, 20200624, 20200716, 20200820, 20210303
- Skip runs with missing pedestal events: 1810 1812 4738 7134 7135 7217 7229 7230
- Skip runs with Moon above horizon by setting a ped.charge.std.dev < 2 cut
- Cosmic rate cut: use an outlier-resistant filter method based on percentiles (submitted PR to the notebook)
- Remove data with high rate spikes in BOTH pulses>10 p.e. and pulses>30p.e. (3 runs wiped, high humidity of ~90% + lidar, although lidar transmission is >0.9)
- A couple of runs with lower interleaved flatfield/pedestal rate, but I don't put a filter yet.
- Average muon ring intensity looks stable.
- Average muon ring width looks stable.
Surviving runs and exposure:[edit]
34 wobble runs (8.47h).
- 26 runs at low ZD (zd<30deg):
1 : 2021-02-17 : [3738, 3739, 3741, 3742, 3743, 3744] 2 : 2021-04-17 : [4460, 4461, 4462, 4463, 4464, 4465] 3 : 2021-05-04 : [4594, 4595] 4 : 2021-05-07 : [4636, 4637] 5 : 2021-06-09 : [4986] 6 : 2022-03-01 : [7185] 7 : 2022-03-07 : [7330, 7331, 7332, 7333, 7334, 7335] 8 : 2022-03-23 : [7441, 7444]
- 8 runs at mid ZD (30deg < zd < 50deg)
1 : 2021-02-17 : [3745, 3746, 3747, 3748] 2 : 2021-04-19 : [4495] 3 : 2022-03-01 : [7186, 7187, 7188]
