ASTROSAT CZTI

Data Quality Report

Orbit 20200511_A08_003T17_9000003656_level2

Creation date: 2025-12-11T00:16:51.647827
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_003T17_9000003656cztM0_level2.fits modeM0/AS1A08_003T17_9000003656cztM0_level2_quad_clean.evt
Size (bytes)250,951,680242,470,080
Size239.3 MB 231.2 MB
Events in quadrant A1,535,6921,457,637
Events in quadrant B1,457,8441,446,725
Events in quadrant C1,484,1981,365,493
Events in quadrant D1,292,1941,243,588

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0547940
B0602900
C0568680
D0672880

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05440
B05440
C05440
D05460

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0190
C0190
D0190

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A265865922.226736%
B2658811894.471942%
C265927322.752708%
D265919893.719304%

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 29147 26606 0 0 0.00% 0.00%
B 29147 26601 0 0 0.00% 0.00%
C 29147 26610 0 0 0.00% 0.00%
D 29147 26575 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 1525 11.32 398 371 102.0
A 7 110 1224 8.37 398 371 102.0
A 0 30 1208 8.21 398 371 102.0
B 2 9 1153 9.99 385 365 78.9
B 3 17 1003 8.08 385 365 78.9
B 2 8 977 7.76 385 365 78.9
C 12 241 1080 6.94 392 362 103.4
C 3 126 1036 6.51 392 362 103.4
C 2 191 1004 6.21 392 362 103.4
D 3 14 970 6.32 368 334 100.6
D 7 3 938 6.0 368 334 100.6
D 10 189 934 5.96 368 334 100.6

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