ASTROSAT CZTI

Data Quality Report

Orbit 20210125_A10_121T01_9000004134_level2

Creation date: 2025-12-20T02:09:47.791535
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/AS1A10_121T01_9000004134cztM0_level2.fits modeM0/AS1A10_121T01_9000004134cztM0_level2_quad_clean.evt
Size (bytes)1,965,147,8401,906,542,720
Size1.8 GB 1.8 GB
Events in quadrant A12,367,54812,200,770
Events in quadrant B11,872,71612,262,108
Events in quadrant C11,894,72411,216,695
Events in quadrant D9,350,7328,063,185

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03100
B03100
C03100
D03100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04376910
B04568390
C05788430
D09872480

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A041700
B041700
C041700
D041700

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A20427236261.775084%
B20427259602.917678%
C204272164688.061800%
D2042725794628.367079%

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 235657 204223 0 0 0.00% 0.00%
B 235658 204190 0 0 0.00% 0.00%
C 235657 203891 0 0 0.00% 0.00%
D 235655 203794 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 10407 9.49 3228 3045 775.6
A 7 110 9832 8.75 3228 3045 775.6
A 9 19 9506 8.33 3228 3045 775.6
B 2 9 9489 10.73 3150 3014 603.5
B 2 8 8020 8.29 3150 3014 603.5
B 3 80 7877 8.06 3150 3014 603.5
C 12 241 8455 6.98 3147 2958 787.9
C 3 187 8020 6.42 3147 2958 787.9
C 3 126 8020 6.42 3147 2958 787.9
D 15 46 7044 6.52 2677 2437 706.2
D 3 14 6829 6.22 2677 2437 706.2
D 6 67 6614 5.91 2677 2437 706.2

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