ASTROSAT CZTI

Data Quality Report

Orbit 20180628_A04_148T02_9000002198_level2

Creation date: 2025-11-23T05:05:58.731918
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/AS1A04_148T02_9000002198cztM0_level2.fits modeM0/AS1A04_148T02_9000002198cztM0_level2_quad_clean.evt
Size (bytes)265,239,360244,321,920
Size253.0 MB 233.0 MB
Events in quadrant A1,605,7681,429,122
Events in quadrant B1,530,2881,407,025
Events in quadrant C1,561,9761,334,134
Events in quadrant D1,367,4081,260,795

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05820
B05820
C05820
D05820

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0390
B0390
C0390
D0390

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0592390
B0623580
C0586760
D0721780

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A286271180.412198%
B286272630.918713%
C28627830.289936%
D286275742.005100%

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 32382 28626 0 0 0.00% 0.00%
B 32382 28627 0 0 0.00% 0.00%
C 32382 28627 0 0 0.00% 0.00%
D 32382 28627 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 1568 11.22 417 391 104.9
A 7 110 1335 9.0 417 391 104.9
A 0 30 1190 7.62 417 391 104.9
B 2 9 1356 12.02 404 386 80.7
B 14 254 1037 8.07 404 386 80.7
B 5 232 1032 8.01 404 386 80.7
C 1 81 1186 7.37 412 384 108.8
C 1 80 1163 7.16 412 384 108.8
C 12 241 1136 6.91 412 384 108.8
D 6 231 1033 6.33 389 354 107.2
D 3 14 990 5.93 389 354 107.2
D 3 159 989 5.92 389 354 107.2

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