ASTROSAT CZTI

Data Quality Report

Orbit 20251205_A14_022T16_9000006532_level2

Creation date: 2026-01-10T02:55:41.547078
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/AS1A14_022T16_9000006532cztM0_level2.fits modeM0/AS1A14_022T16_9000006532cztM0_level2_quad_clean.evt
Size (bytes)780,511,680476,827,200
Size744.4 MB 454.7 MB
Events in quadrant A4,653,6782,101,287
Events in quadrant B4,415,5542,255,219
Events in quadrant C4,515,6141,955,153
Events in quadrant D3,639,4661,717,932

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A018960
B019000
C019000
D018940

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02093350
B01939160
C02114120
D03207550

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06230
B06240
C06240
D06240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9344218111.938101%
B934429571.024165%
C9343114901.594760%
D933951247613.358317%

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 95342 86521 0 0 0.00% 0.00%
B 95342 86528 0 0 0.00% 0.00%
C 95342 86475 0 0 0.00% 0.00%
D 95342 86176 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 14 188 5082 9.64 1220 1120 411.1
A 9 255 4611 8.49 1220 1120 411.1
A 14 204 4172 7.42 1220 1120 411.1
B 2 9 4912 13.73 1163 1098 277.8
B 2 8 4355 11.73 1163 1098 277.8
B 3 25 3674 9.27 1163 1098 277.8
C 15 175 3810 6.49 1203 1086 419.7
C 2 31 3525 5.81 1203 1086 419.7
C 6 179 3466 5.67 1203 1086 419.7
D 6 218 4498 10.16 1037 920 352.0
D 15 11 3428 7.12 1037 920 352.0
D 3 30 3374 6.97 1037 920 352.0

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