ASTROSAT CZTI

Data Quality Report

Orbit 20161220_A02_103T01_9000000904_level2

Creation date: 2025-11-08T18:40:11.841957
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_103T01_9000000904cztM0_level2.fits modeM0/AS1A02_103T01_9000000904cztM0_level2_quad_clean.evt
Size (bytes)779,423,040793,987,200
Size743.3 MB 757.2 MB
Events in quadrant A4,665,8304,734,926
Events in quadrant B4,615,0184,872,470
Events in quadrant C4,670,0504,556,747
Events in quadrant D3,708,8723,944,863

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01936240
B01828460
C01938750
D02980050

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01210
B01210
C01210
D01210

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A017620
B017620
C017620
D017620

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8661130053.469536%
B8661214181.637187%
C8661120302.343813%
D866071269114.653550%

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 98193 86616 0 0 0.00% 0.00%
B 98193 86619 0 0 0.00% 0.00%
C 98193 86595 0 0 0.00% 0.00%
D 98193 86196 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 4681 11.49 1214 1130 309.1
A 7 110 4013 9.33 1214 1130 309.1
A 0 30 3549 7.83 1214 1130 309.1
B 2 9 3979 11.49 1215 1153 245.9
B 12 226 3181 8.25 1215 1153 245.9
B 14 254 3102 7.93 1215 1153 245.9
C 1 80 3457 7.04 1231 1133 330.3
C 1 81 3360 6.74 1231 1133 330.3
C 12 241 3218 6.31 1231 1133 330.3
D 6 231 2711 6.04 1058 956 290.6
D 7 5 2700 6.0 1058 956 290.6
D 3 14 2695 5.98 1058 956 290.6

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