ASTROSAT CZTI

Data Quality Report

Orbit 20180425_A04_219T01_9000002054_level2

Creation date: 2025-11-22T00:47:33.843090
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_219T01_9000002054cztM0_level2.fits modeM0/AS1A04_219T01_9000002054cztM0_level2_quad_clean.evt
Size (bytes)269,637,120201,035,520
Size257.1 MB 191.7 MB
Events in quadrant A1,673,6561,113,560
Events in quadrant B1,607,4641,105,197
Events in quadrant C1,652,3381,077,494
Events in quadrant D1,371,706930,184

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0572300
B0572730
C0571350
D0927530

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05520
B05520
C05520
D05520

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0610
B0610
C0610
D0610

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A270533001.108934%
B270533411.260489%
C270532550.942594%
D2705317306.394855%

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 32867 27047 0 0 0.00% 0.00%
B 32866 27046 0 0 0.00% 0.00%
C 32867 27047 0 0 0.00% 0.00%
D 32867 26991 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 1587 10.7 436 408 110.2
A 7 110 1296 8.06 436 408 110.2
A 0 30 1246 7.6 436 408 110.2
B 2 9 1450 12.34 422 403 84.8
B 3 17 1105 8.28 422 403 84.8
B 5 225 1095 8.16 422 403 84.8
C 1 80 1253 7.42 435 408 113.9
C 1 81 1228 7.2 435 408 113.9
C 1 65 1140 6.42 435 408 113.9
D 6 231 1005 5.99 392 357 108.2
D 7 3 994 5.89 392 357 108.2
D 6 67 959 5.56 392 357 108.2

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