ASTROSAT CZTI

Data Quality Report

Orbit 20170216_A02_134T01_9000001036_level2

Creation date: 2025-11-09T16:13:41.112199
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/AS1A02_134T01_9000001036cztM0_level2.fits modeM0/AS1A02_134T01_9000001036cztM0_level2_quad_clean.evt
Size (bytes)786,801,600890,890,560
Size750.4 MB 849.6 MB
Events in quadrant A4,770,6645,602,123
Events in quadrant B4,602,7125,577,059
Events in quadrant C4,624,7645,187,624
Events in quadrant D4,009,2724,795,750

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A017360
B017360
C017360
D017360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01736460
B01796750
C01901100
D01950320

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01250
B01250
C01250
D01250

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A848776620.779952%
B848778991.059180%
C8487710911.285389%
D8487717722.087727%

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 97793 84872 0 0 0.00% 0.00%
B 97793 84871 0 0 0.00% 0.00%
C 97793 84874 0 0 0.00% 0.00%
D 97793 84866 0 0 0.00% 0.00%

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 29 4736 11.38 1239 1161 314.1
A 7 110 3940 8.85 1239 1161 314.1
A 0 30 3787 8.36 1239 1161 314.1
B 2 9 3959 11.9 1212 1157 235.5
B 14 254 3198 8.67 1212 1157 235.5
B 12 226 3047 8.03 1212 1157 235.5
C 1 80 3408 7.0 1222 1135 324.5
C 1 81 3355 6.84 1222 1135 324.5
C 12 241 3302 6.68 1222 1135 324.5
D 3 14 2964 6.34 1141 1039 303.8
D 6 231 2919 6.19 1141 1039 303.8
D 7 5 2866 6.01 1141 1039 303.8

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