ASTROSAT CZTI

Data Quality Report

Orbit 18540

Creation date: 2024-06-27T17:51:22.502747
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A05_104T02_9000002752_18540cztM0_level2.evt modeM0/AS1A05_104T02_9000002752_18540cztM0_level2_quad_clean.evt
Size (bytes)603,673,920110,309,760
Size575.7 MB 105.2 MB
Events in quadrant A5,182,896728,886
Events in quadrant B3,553,090765,180
Events in quadrant C3,356,652719,687
Events in quadrant D5,752,589676,582

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0170
C0170
D0170

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0197812
B0147442
C0141053
D0214842

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A646068510.603715%
B64601051.625387%
C64591111.718532%
D64596109.444186%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 7710 6460 506 506 6.56% 7.83%
B 7710 6460 16 16 0.21% 0.25%
C 7709 6459 4 4 0.05% 0.06%
D 7708 6458 518 518 6.72% 8.02%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 0 13 1989013 12043.44 824 809 165.1
A 14 111 21033 122.51 824 809 165.1
A 13 254 10300 57.49 824 809 165.1
B 3 64 82193 507.12 854 836 160.4
B 15 222 59667 366.71 854 836 160.4
B 4 80 53727 329.68 854 836 160.4
C 14 238 128058 671.13 821 828 189.6
C 0 207 28465 145.78 821 828 189.6
C 13 61 5811 26.29 821 828 189.6
D 7 238 2092458 10570.42 819 798 197.9
D 1 52 496225 2503.69 819 798 197.9
D 15 0 29924 147.19 819 798 197.9

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter