ASTROSAT CZTI

Data Quality Report

Orbit 20210614_A10_071T28_9000004464_level2

Creation date: 2025-12-26T23:40:51.400302
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/AS1A10_071T28_9000004464cztM0_level2.fits modeM0/AS1A10_071T28_9000004464cztM0_level2_quad_clean.evt
Size (bytes)701,049,600518,636,160
Size668.6 MB 494.6 MB
Events in quadrant A4,433,6622,914,760
Events in quadrant B4,137,7722,828,317
Events in quadrant C4,200,9702,706,287
Events in quadrant D3,660,7362,458,427

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01120
B01120
C01120
D01120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01462920
B02299280
C01527750
D01870630

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014300
B014300
C014300
D014300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A699329721.389922%
B6993229354.196934%
C6993221163.025796%
D6993121443.065879%

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 81397 69922 0 0 0.00% 0.00%
B 81397 69917 0 0 0.00% 0.00%
C 81397 69911 0 0 0.00% 0.00%
D 81397 69906 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 3634 9.05 1156 1089 281.1
A 7 110 3500 8.58 1156 1089 281.1
A 9 19 3202 7.52 1156 1089 281.1
B 2 9 3192 10.14 1093 1045 211.7
B 5 225 2766 8.13 1093 1045 211.7
B 5 128 2750 8.05 1093 1045 211.7
C 9 209 2932 6.66 1112 1041 283.8
C 12 241 2869 6.44 1112 1041 283.8
C 3 187 2844 6.35 1112 1041 283.8
D 7 3 2584 5.79 1047 953 281.6
D 15 46 2565 5.72 1047 953 281.6
D 6 67 2548 5.66 1047 953 281.6

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