ASTROSAT CZTI

Data Quality Report

Orbit 57231

Creation date: 2026-04-30T20:07:58.128735
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_070T08_9000006568_57231cztM0_level2.fits modeM0/AS1A14_070T08_9000006568_57231cztM0_level2_quad_clean.evt
Size (bytes)474,672,96094,199,040
Size452.7 MB 89.8 MB
Events in quadrant A3,996,852615,388
Events in quadrant B3,622,479672,628
Events in quadrant C5,740,701553,847
Events in quadrant D3,701,961554,089

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0165422
B0154662
C0217082
D0158522

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A65433615.517347%
B65442213.377139%
C654474711.415037%
D65442694.110636%

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 7588 6544 266 266 3.51% 4.06%
B 7589 6545 101 101 1.33% 1.54%
C 7589 6545 605 605 7.97% 9.24%
D 7589 6545 243 243 3.20% 3.71%

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 4 13 758542 4390.25 696 678 172.6
A 7 64 331730 1917.76 696 678 172.6
A 3 14 69138 396.58 696 678 172.6
B 10 16 339573 2310.78 689 663 146.7
B 10 247 111973 758.94 689 663 146.7
B 5 185 79439 537.12 689 663 146.7
C 15 224 2939753 16589.72 646 640 177.2
C 7 112 115541 648.55 646 640 177.2
C 14 67 67913 379.72 646 640 177.2
D 12 128 677831 3556.59 669 637 190.4
D 8 240 86468 450.78 669 637 190.4
D 7 96 82839 431.72 669 637 190.4

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