ASTROSAT CZTI

Data Quality Report

Orbit 20200521_A08_003T16_9000003676_level2

Creation date: 2025-12-11T03:36:16.043833
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/AS1A08_003T16_9000003676cztM0_level2.fits modeM0/AS1A08_003T16_9000003676cztM0_level2_quad_clean.evt
Size (bytes)248,941,440138,513,600
Size237.4 MB 132.1 MB
Events in quadrant A1,589,008689,748
Events in quadrant B1,515,064685,186
Events in quadrant C1,523,412644,314
Events in quadrant D1,274,832537,392

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0590
B0590
C0590
D0590

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04840
B04840
C04840
D04840

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0506800
B0513860
C0603540
D0842010

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A237852821.185621%
B237853231.357999%
C237855222.194661%
D23784254710.708880%

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 29610 23781 0 0 0.00% 0.00%
B 29610 23780 0 0 0.00% 0.00%
C 29610 23781 0 0 0.00% 0.00%
D 29609 23777 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 1499 10.73 414 389 103.5
A 7 110 1250 8.32 414 389 103.5
A 0 30 1203 7.87 414 389 103.5
B 2 9 1173 9.69 400 383 81.5
B 5 128 1007 7.66 400 383 81.5
B 14 254 987 7.41 400 383 81.5
C 1 81 1144 7.35 401 378 104.3
C 1 80 1120 7.12 401 378 104.3
C 3 202 1092 6.85 401 378 104.3
D 3 14 926 6.14 363 332 96.8
D 7 3 912 5.99 363 332 96.8
D 10 189 903 5.9 363 332 96.8

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