ASTROSAT CZTI

Data Quality Report

Orbit 26938

Creation date: 2024-06-27T19:34:43.242758
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/AS1A09_134T01_9000003896_26938cztM0_level2.evt modeM0/AS1A09_134T01_9000003896_26938cztM0_level2_quad_clean.evt
Size (bytes)725,736,96066,942,720
Size692.1 MB 63.8 MB
Events in quadrant A8,245,305335,849
Events in quadrant B5,137,953426,454
Events in quadrant C3,612,568427,343
Events in quadrant D4,559,023398,212

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0140

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0287140
B0194010
C0144200
D0174090

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6286221435.221126%
B62864336.888323%
C62861061.686287%
D62862704.295259%

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 7671 6286 1646 1646 21.46% 26.19%
B 7671 6286 266 266 3.47% 4.23%
C 7671 6287 4 4 0.05% 0.06%
D 7671 6287 196 196 2.56% 3.12%

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 14 235 5316624 37107.5 725 715 143.3
A 0 13 79027 546.65 725 715 143.3
A 8 192 31272 213.3 725 715 143.3
B 0 189 1699779 10734.91 861 842 158.3
B 0 219 34399 212.03 861 842 158.3
B 10 246 28185 172.77 861 842 158.3
C 14 238 140815 717.01 856 865 195.2
C 0 207 123348 627.52 856 865 195.2
C 15 208 15189 73.39 856 865 195.2
D 1 52 932555 4796.81 839 821 194.2
D 2 250 296255 1520.97 839 821 194.2
D 7 80 56821 288.3 839 821 194.2

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