ASTROSAT CZTI

Data Quality Report

Orbit 20190317_A05_156T01_9000002804_level2

Creation date: 2025-11-28T20:56:45.355456
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/AS1A05_156T01_9000002804cztM0_level2.fits modeM0/AS1A05_156T01_9000002804cztM0_level2_quad_clean.evt
Size (bytes)743,296,320695,980,800
Size708.9 MB 663.7 MB
Events in quadrant A4,584,5164,133,063
Events in quadrant B4,383,5084,132,614
Events in quadrant C4,467,6363,973,234
Events in quadrant D3,938,8043,702,241

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01576020
B01608670
C01610010
D01684370

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01240
D01240

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014580
B014580
C014580
D014580

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A751467571.007372%
B7514611461.525031%
C7514613691.821787%
D7514611331.507732%

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 87467 75145 0 0 0.00% 0.00%
B 87467 75146 0 0 0.00% 0.00%
C 87467 75144 0 0 0.00% 0.00%
D 87467 75143 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 4326 10.93 1194 1120 293.4
A 7 110 3591 8.42 1194 1120 293.4
A 9 19 3467 8.0 1194 1120 293.4
B 2 9 3602 10.97 1158 1105 227.7
B 2 8 3034 8.47 1158 1105 227.7
B 5 128 2865 7.73 1158 1105 227.7
C 1 80 3334 7.44 1178 1102 300.0
C 1 81 3317 7.38 1178 1102 300.0
C 12 241 3087 6.62 1178 1102 300.0
D 10 190 2959 6.56 1123 1025 294.8
D 3 14 2837 6.15 1123 1025 294.8
D 10 189 2745 5.84 1123 1025 294.8

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