ASTROSAT CZTI

Data Quality Report

Orbit 20180614_G08_020T01_9000002168_level2

Creation date: 2025-11-22T23:21:23.749881
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/AS1G08_020T01_9000002168cztM0_level2.fits modeM0/AS1G08_020T01_9000002168cztM0_level2_quad_clean.evt
Size (bytes)411,854,400385,894,080
Size392.8 MB 368.0 MB
Events in quadrant A2,541,9722,350,850
Events in quadrant B2,440,7542,304,148
Events in quadrant C2,506,1882,187,093
Events in quadrant D2,218,8262,078,461

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08200
B08200
C08200
D08200

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0872920
B0877920
C01007090
D0906080

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0860
B0860
C0860
D0860

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A402884421.097101%
B402885901.464456%
C402884691.164118%
D402888522.114774%

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 48798 40283 0 0 0.00% 0.00%
B 48798 40282 0 0 0.00% 0.00%
C 48798 40284 0 0 0.00% 0.00%
D 48798 40275 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 2335 10.29 662 621 166.6
A 9 19 2059 8.63 662 621 166.6
A 7 110 1981 8.16 662 621 166.6
B 2 9 2047 11.08 645 616 129.1
B 3 17 1688 8.3 645 616 129.1
B 14 254 1556 7.28 645 616 129.1
C 12 241 1715 6.4 663 621 170.9
C 2 191 1708 6.36 663 621 170.9
C 3 126 1672 6.15 663 621 170.9
D 6 231 1755 6.97 631 575 169.3
D 3 14 1570 5.88 631 575 169.3
D 6 67 1534 5.66 631 575 169.3

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