ASTROSAT CZTI

Data Quality Report

Orbit 35366

Creation date: 2022-04-15T10:38:30.475525
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/AS1A11_099T01_9000005068_35366cztM0_level2.evt modeM0/AS1A11_099T01_9000005068_35366cztM0_level2_quad_clean.evt
Size (bytes)763,721,28072,941,760
Size728.3 MB 69.6 MB
Events in quadrant A2,726,502558,407
Events in quadrant B12,044,826223,659
Events in quadrant C3,086,813551,699
Events in quadrant D4,920,671509,508

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0370
B0370
C0370
D0380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0112303
B0392502
C0121822
D0185042

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01040
B01040
C01040
D01040

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5189400.770861%
B5189448086.336481%
C51891482.852187%
D51892434.682983%

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 7102 5190 28 28 0.39% 0.54%
B 7102 5190 4063 4063 57.21% 78.29%
C 7102 5190 114 114 1.61% 2.20%
D 7102 5190 244 244 3.44% 4.70%

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 10 83 114386 898.21 626 613 126.7
A 15 169 95944 752.61 626 613 126.7
A 9 143 67017 524.24 626 613 126.7
B 4 251 10497930 182299.64 293 286 57.6
B 5 172 181969 3155.06 293 286 57.6
B 5 236 84448 1461.54 293 286 57.6
C 0 10 480412 3423.93 594 599 140.1
C 15 214 214349 1525.31 594 599 140.1
C 3 233 50998 359.65 594 599 140.1
D 8 195 1085459 7333.72 599 583 147.9
D 12 235 389018 2625.81 599 583 147.9
D 7 80 333874 2253.03 599 583 147.9

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