ASTROSAT CZTI

Data Quality Report

Orbit 51664

Creation date: 2025-04-22T12:00:59.415728
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/AS1A13_031T01_9000006462_51664cztM0_level2.fits modeM0/AS1A13_031T01_9000006462_51664cztM0_level2_quad_clean.evt
Size (bytes)565,009,920101,275,200
Size538.8 MB 96.6 MB
Events in quadrant A5,795,298631,293
Events in quadrant B4,969,704685,256
Events in quadrant C5,780,542624,743
Events in quadrant D3,811,540624,398

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0223452
B0198513
C0222722
D0167252

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01500
B01500
C01500
D01500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A71846979.702116%
B71835567.740498%
C71846438.950445%
D71841642.282851%

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 8504 7186 577 577 6.79% 8.03%
B 8503 7184 322 322 3.79% 4.48%
C 8504 7186 522 522 6.14% 7.26%
D 8504 7186 130 130 1.53% 1.81%

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 7 64 1972393 10669.11 736 716 184.8
A 13 248 520795 2814.25 736 716 184.8
A 12 3 86917 466.45 736 716 184.8
B 1 223 667533 4177.07 734 707 159.6
B 1 207 214967 1342.15 734 707 159.6
B 12 32 213380 1332.21 734 707 159.6
C 15 189 1147387 5794.85 727 724 197.9
C 14 245 861029 4347.69 727 724 197.9
C 12 254 268949 1355.52 727 724 197.9
D 2 249 424076 2043.15 736 709 207.2
D 8 176 202087 971.84 736 709 207.2
D 5 173 60716 289.59 736 709 207.2

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