ASTROSAT CZTI

Data Quality Report

Orbit 20210311_A10_064T03_9000004246_level2

Creation date: 2025-12-22T18:11:24.448572
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_064T03_9000004246cztM0_level2.fits modeM0/AS1A10_064T03_9000004246cztM0_level2_quad_clean.evt
Size (bytes)839,819,520790,286,400
Size800.9 MB 753.7 MB
Events in quadrant A5,476,4605,324,165
Events in quadrant B5,249,7225,344,508
Events in quadrant C5,305,9284,928,113
Events in quadrant D3,365,2442,323,211

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A017860
B017860
C017860
D017860

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01819520
B01854520
C02128940
D05962410

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A876808390.956889%
B8768010821.234033%
C8768031863.633668%
D876805260359.994297%

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 102130 87678 0 0 0.00% 0.00%
B 102130 87677 0 0 0.00% 0.00%
C 102130 87622 0 0 0.00% 0.00%
D 102130 87329 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 4707 9.68 1427 1346 347.0
A 7 110 4287 8.47 1427 1346 347.0
A 9 19 4119 7.99 1427 1346 347.0
B 2 9 4115 10.19 1392 1333 273.1
B 3 17 3532 8.05 1392 1333 273.1
B 2 8 3467 7.81 1392 1333 273.1
C 12 241 3660 6.58 1404 1324 355.2
C 3 187 3658 6.57 1404 1324 355.2
C 3 126 3485 6.08 1404 1324 355.2
D 4 246 2604 6.77 962 879 255.0
D 15 46 2589 6.71 962 879 255.0
D 6 67 2416 6.03 962 879 255.0

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