ASTROSAT CZTI

Data Quality Report

Orbit 58946

Creation date: 2026-08-20T08:29:32.489971
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_004T07_9000006598_58946cztM0_level2.fits modeM0/AS1A14_004T07_9000006598_58946cztM0_level2_quad_clean.evt
Size (bytes)614,822,400104,253,120
Size586.3 MB 99.4 MB
Events in quadrant A8,214,238589,437
Events in quadrant B4,653,477739,274
Events in quadrant C5,070,207680,600
Events in quadrant D4,258,690642,409

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0293082
B0188052
C0199022
D0177062

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0190
C0190
D0190

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01500
B01500
C01500
D01500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7248155821.495585%
B72494135.697338%
C72491922.648641%
D72491231.696786%

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 9178 7248 1314 1314 14.32% 18.13%
B 9179 7249 216 216 2.35% 2.98%
C 9179 7250 147 147 1.60% 2.03%
D 9179 7250 95 95 1.03% 1.31%

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 14 238 4644357 24988.21 750 729 185.8
A 10 251 342524 1839.26 750 729 185.8
A 15 233 95586 510.44 750 729 185.8
B 5 185 658682 3880.62 792 760 169.5
B 4 171 271786 1598.59 792 760 169.5
B 5 172 188024 1104.54 792 760 169.5
C 9 53 1236180 5647.17 788 780 218.8
C 12 252 362142 1651.83 788 780 218.8
C 6 223 156995 714.08 788 780 218.8
D 11 129 392967 1726.25 788 752 227.2
D 7 222 278068 1220.55 788 752 227.2
D 6 63 167671 734.66 788 752 227.2

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

TCT plots

Parameter TCT0 TCT_healed
Tct