ASTROSAT CZTI

Data Quality Report

Orbit 20170713_T01_176T01_9000001378_level2

Creation date: 2025-11-15T10:42:17.010573
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_176T01_9000001378cztM0_level2.fits modeM0/AS1T01_176T01_9000001378cztM0_level2_quad_clean.evt
Size (bytes)157,086,720154,892,160
Size149.8 MB 147.7 MB
Events in quadrant A947,296926,352
Events in quadrant B909,310919,119
Events in quadrant C931,902878,795
Events in quadrant D807,450805,105

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0350010
B0362640
C0377550
D0421530

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03440
B03440
C03420
D03440

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A168414562.707678%
B168424832.867830%
C168332811.669340%
D168314162.471630%

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 17980 16881 0 0 0.00% 0.00%
B 17980 16881 0 0 0.00% 0.00%
C 17980 16884 0 0 0.00% 0.00%
D 17980 16882 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 14 188 964 11.2 246 229 65.6
A 0 29 912 10.41 246 229 65.6
A 7 110 812 8.89 246 229 65.6
B 2 9 762 10.76 239 228 49.6
B 3 17 658 8.67 239 228 49.6
B 14 254 617 7.84 239 228 49.6
C 1 81 779 8.32 246 226 66.5
C 1 80 744 7.79 246 226 66.5
C 12 241 650 6.38 246 226 66.5
D 3 14 603 6.22 229 208 63.5
D 6 231 584 5.92 229 208 63.5
D 1 19 575 5.78 229 208 63.5

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