ASTROSAT CZTI

Data Quality Report

Orbit 20161125_A02_118T01_9000000826_level2

Creation date: 2025-11-07T23:02:00.795331
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_118T01_9000000826cztM0_level2.fits modeM0/AS1A02_118T01_9000000826cztM0_level2_quad_clean.evt
Size (bytes)818,729,2801,013,448,960
Size780.8 MB 966.5 MB
Events in quadrant A4,919,0526,553,958
Events in quadrant B4,706,5586,353,946
Events in quadrant C4,912,8066,317,790
Events in quadrant D3,974,8425,194,670

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01430
B01430
C01430
D01430

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A018700
B018700
C018700
D018700

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02217250
B02259720
C01868260
D03352160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9151314071.537486%
B9151347315.169757%
C915138100.885120%
D915131180812.903085%

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 106044 91500 0 0 0.00% 0.00%
B 106045 91453 0 0 0.00% 0.00%
C 106045 91501 0 0 0.00% 0.00%
D 106044 91455 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 14 188 5072 12.13 1279 1201 319.2
A 0 29 4577 10.58 1279 1201 319.2
A 14 204 4338 9.83 1279 1201 319.2
B 2 9 4096 12.15 1244 1191 239.1
B 12 226 3331 8.95 1244 1191 239.1
B 14 254 3244 8.58 1244 1191 239.1
C 1 80 3616 7.04 1296 1204 342.5
C 1 81 3573 6.92 1296 1204 342.5
C 12 241 3506 6.72 1296 1204 342.5
D 11 82 2962 6.33 1132 1024 306.1
D 3 14 2961 6.33 1132 1024 306.1
D 4 160 2942 6.27 1132 1024 306.1

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