ASTROSAT CZTI

Data Quality Report

Orbit 20171109_A04_021T03_9000001678_level2

Creation date: 2025-11-18T07:19:14.286991
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_021T03_9000001678cztM0_level2.fits modeM0/AS1A04_021T03_9000001678cztM0_level2_quad_clean.evt
Size (bytes)602,496,000609,494,400
Size574.6 MB 581.3 MB
Events in quadrant A3,684,1543,633,723
Events in quadrant B3,434,0863,415,429
Events in quadrant C3,663,6683,780,372
Events in quadrant D2,996,0563,164,407

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01382300
B01830460
C01335120
D01938720

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0930
B0930
C0930
D0930

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013220
B013220
C013220
D013220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A651077181.102800%
B6510744236.793432%
C651073960.608230%
D6510762729.633373%

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 74272 65107 0 0 0.00% 0.00%
B 74272 65093 0 0 0.00% 0.00%
C 74272 65108 0 0 0.00% 0.00%
D 74272 64586 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 3555 11.11 959 894 239.5
A 7 110 2985 8.73 959 894 239.5
A 0 30 2720 7.62 959 894 239.5
B 2 9 3063 12.25 905 861 179.7
B 2 8 2314 8.08 905 861 179.7
B 3 17 2299 8.0 905 861 179.7
C 12 250 2731 7.27 965 895 252.5
C 1 80 2666 7.01 965 895 252.5
C 1 81 2572 6.64 965 895 252.5
D 6 231 2213 6.28 854 779 228.4
D 3 14 2178 6.12 854 779 228.4
D 6 83 2122 5.88 854 779 228.4

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