ASTROSAT CZTI

Data Quality Report

Orbit 20180613_A04_075T04_9000002160_level2

Creation date: 2025-11-22T21:22:51.875072
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_075T04_9000002160cztM0_level2.fits modeM0/AS1A04_075T04_9000002160cztM0_level2_quad_clean.evt
Size (bytes)88,945,92067,766,400
Size84.8 MB 64.6 MB
Events in quadrant A546,510379,827
Events in quadrant B519,532369,774
Events in quadrant C529,318341,910
Events in quadrant D471,648332,989

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0194190
B0195840
C0236190
D0199760

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0190
C0190
D0190

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01840
B01840
C01840
D01840

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A90351511.671278%
B90351942.147205%
C90351241.372441%
D90351691.870504%

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 10875 9033 0 0 0.00% 0.00%
B 10875 9033 0 0 0.00% 0.00%
C 10875 9034 0 0 0.00% 0.00%
D 10875 9032 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 29 536 10.7 142 134 37.6
A 7 110 436 8.04 142 134 37.6
A 0 30 410 7.35 142 134 37.6
B 2 9 487 11.89 137 130 30.0
B 3 17 355 7.49 137 130 30.0
B 3 80 355 7.49 137 130 30.0
C 3 126 381 6.6 140 131 37.9
C 9 188 371 6.33 140 131 37.9
C 12 241 367 6.23 140 131 37.9
D 3 31 345 5.97 134 122 37.4
D 6 231 341 5.86 134 122 37.4
D 7 5 340 5.84 134 122 37.4

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