ASTROSAT CZTI

Data Quality Report

Orbit 20201218_A10_067T01_9000004076_level2

Creation date: 2025-12-18T19:06:27.787914
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_067T01_9000004076cztM0_level2.fits modeM0/AS1A10_067T01_9000004076cztM0_level2_quad_clean.evt
Size (bytes)177,341,760142,963,200
Size169.1 MB 136.3 MB
Events in quadrant A1,107,562816,483
Events in quadrant B1,057,416816,885
Events in quadrant C1,067,592768,162
Events in quadrant D893,742683,166

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0374350
B0374490
C0374940
D0622700

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03740
B03740
C03740
D03740

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0310
B0280
C0310
D0300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A180403191.768293%
B180403241.796009%
C180353732.068201%
D18023221512.289852%

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 18326 16310 0 0 0.00% 0.00%
B 18326 16309 0 0 0.00% 0.00%
C 18326 16310 0 0 0.00% 0.00%
D 18326 16290 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 29 902 8.68 288 270 72.8
A 7 110 891 8.53 288 270 72.8
A 14 95 859 8.09 288 270 72.8
B 2 9 839 10.05 279 266 57.0
B 2 8 732 8.18 279 266 57.0
B 5 128 728 8.11 279 266 57.0
C 12 241 755 6.86 281 263 71.7
C 3 126 749 6.78 281 263 71.7
C 9 209 721 6.39 281 263 71.7
D 3 14 691 6.63 254 231 69.4
D 4 246 686 6.56 254 231 69.4
D 7 3 641 5.91 254 231 69.4

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