ASTROSAT CZTI

Data Quality Report

Orbit 20171020_A04_058T02_9000001626_level2

Creation date: 2025-11-17T21:20:03.288610
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/AS1A04_058T02_9000001626cztM0_level2.fits modeM0/AS1A04_058T02_9000001626cztM0_level2_quad_clean.evt
Size (bytes)151,200,000174,179,520
Size144.2 MB 166.1 MB
Events in quadrant A860,2721,010,814
Events in quadrant B857,4541,032,322
Events in quadrant C907,6561,089,205
Events in quadrant D769,620959,507

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03460
B03460
C03460
D03480

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0230
B0230
C0230
D0230

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0552960
B0472060
C0354520
D0461010

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A17157184710.765285%
B1714012217.123687%
C171671560.908720%
D171676954.048465%

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 19775 17288 0 0 0.00% 0.00%
B 19775 17273 0 0 0.00% 0.00%
C 19775 17281 0 0 0.00% 0.00%
D 19775 17281 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 14 188 880 11.41 223 209 58.8
A 0 29 813 10.27 223 209 58.8
A 14 204 735 8.95 223 209 58.8
B 2 9 762 11.29 227 215 48.5
B 3 17 588 7.7 227 215 48.5
B 12 226 570 7.33 227 215 48.5
C 12 241 657 6.75 240 223 64.3
C 2 191 648 6.61 240 223 64.3
C 9 242 619 6.16 240 223 64.3
D 4 246 628 7.06 219 199 60.8
D 3 14 622 6.96 219 199 60.8
D 3 31 588 6.4 219 199 60.8

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