ASTROSAT CZTI

Data Quality Report

Orbit 20160403_T01_055T01_9000000408_level2

Creation date: 2025-10-28T22:41:28.374350
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/AS1T01_055T01_9000000408cztM0_level2.fits modeM0/AS1T01_055T01_9000000408cztM0_level2_quad_clean.evt
Size (bytes)178,885,440168,906,240
Size170.6 MB 161.1 MB
Events in quadrant A1,052,228970,199
Events in quadrant B1,019,064960,876
Events in quadrant C1,033,136902,642
Events in quadrant D889,528857,812

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04200
B04200
C04200
D04200

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0424900
B0471440
C0476760
D0475310

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A206613321.606892%
B206617213.489667%
C206616042.923382%
D206614982.410338%

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 21956 20660 0 0 0.00% 0.00%
B 21956 20660 0 0 0.00% 0.00%
C 21956 20660 0 0 0.00% 0.00%
D 21956 20655 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 1026 10.65 273 254 72.5
A 0 29 1018 10.54 273 254 72.5
A 14 204 904 8.96 273 254 72.5
B 2 9 881 10.93 268 253 57.4
B 12 226 794 9.42 268 253 57.4
B 14 254 763 8.88 268 253 57.4
C 12 241 782 7.04 273 249 75.6
C 7 111 763 6.79 273 249 75.6
C 9 188 713 6.13 273 249 75.6
D 3 14 727 6.8 253 228 73.3
D 7 5 658 5.86 253 228 73.3
D 11 82 649 5.74 253 228 73.3

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