ASTROSAT CZTI

Data Quality Report

Orbit 20151125_P01_171T01_9000000126_level2

Creation date: 2025-10-23T19:00:29.603527
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/AS1P01_171T01_9000000126cztM0_level2.fits modeM0/AS1P01_171T01_9000000126cztM0_level2_quad_clean.evt
Size (bytes)260,187,840293,034,240
Size248.1 MB 279.5 MB
Events in quadrant A1,503,9321,761,133
Events in quadrant B1,486,8501,766,341
Events in quadrant C1,485,6421,684,694
Events in quadrant D1,275,1221,534,253

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06260
B06260
C06260
D06260

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01323550
B01418270
C01324000
D01295860

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0300
B0300
C0300
D0300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A30962750.242232%
B309624331.398488%
C30962520.167948%
D309624161.343582%

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 33921 30959 0 0 0.00% 0.00%
B 33922 30959 0 0 0.00% 0.00%
C 33922 30962 0 0 0.00% 0.00%
D 33921 30960 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 1376 10.92 388 362 92.8
A 7 110 1364 10.8 388 362 92.8
A 0 30 1100 7.95 388 362 92.8
B 2 9 1214 11.37 392 371 74.2
B 14 254 1046 9.1 392 371 74.2
B 2 8 951 7.82 392 371 74.2
C 12 241 1055 7.09 392 361 97.9
C 9 242 1043 6.96 392 361 97.9
C 2 191 1016 6.69 392 361 97.9
D 6 44 953 7.1 363 331 87.6
D 11 82 951 7.08 363 331 87.6
D 6 231 929 6.83 363 331 87.6

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