ASTROSAT CZTI

Data Quality Report

Orbit 55476

Creation date: 2025-12-30T11:01:34.107710
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_099T01_9000006536_55476cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55476cztM0_level2_quad_clean.evt
Size (bytes)456,687,36089,542,080
Size435.5 MB 85.4 MB
Events in quadrant A3,335,283601,533
Events in quadrant B2,975,359637,953
Events in quadrant C4,065,007559,216
Events in quadrant D6,058,164489,528

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01220
B01220
C01220
D01220

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0139331
B0131841
C0162501
D0222312

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A60641302.143799%
B60641272.094327%
C60641492.457124%
D606378812.996866%

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 7174 6064 42 42 0.59% 0.69%
B 7174 6064 32 32 0.45% 0.53%
C 7174 6065 80 80 1.12% 1.32%
D 7173 6063 678 678 9.45% 11.18%

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 3 78 336591 2054.72 654 639 163.5
A 3 14 186752 1138.29 654 639 163.5
A 0 8 135218 823.1 654 639 163.5
B 5 172 171827 1254.58 641 617 136.5
B 0 171 110625 806.11 641 617 136.5
B 10 247 89345 650.18 641 617 136.5
C 9 38 959173 5565.42 632 624 172.2
C 13 3 401461 2327.29 632 624 172.2
C 1 16 105263 607.54 632 624 172.2
D 11 129 2470357 14300.39 608 580 172.7
D 5 113 635169 3674.37 608 580 172.7
D 8 160 221745 1280.58 608 580 172.7

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