ASTROSAT CZTI

Data Quality Report

Orbit 57874

Creation date: 2026-06-09T06:10:08.463172
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_125T11_9000006582_57874cztM0_level2.fits modeM0/AS1A14_125T11_9000006582_57874cztM0_level2_quad_clean.evt
Size (bytes)377,815,68086,201,280
Size360.3 MB 82.2 MB
Events in quadrant A2,817,646553,917
Events in quadrant B3,117,275605,891
Events in quadrant C3,872,424518,559
Events in quadrant D3,673,702479,593

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0133472
B0138982
C0161183
D0150232

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200
B0210
C0210
D0210

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6483420.647848%
B6483861.326546%
C64821782.746066%
D6482731.126196%

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 7865 6766 5 5 0.06% 0.07%
B 7865 6766 12 12 0.15% 0.18%
C 7864 6765 125 125 1.59% 1.85%
D 7864 6765 38 38 0.48% 0.56%

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 14 45226 259.31 697 680 171.8
A 7 64 37851 216.38 697 680 171.8
A 3 245 32271 183.89 697 680 171.8
B 5 172 150596 1020.72 690 664 146.9
B 0 63 40413 270.61 690 664 146.9
B 2 249 31022 206.67 690 664 146.9
C 15 224 494494 2724.55 667 659 181.3
C 6 13 200631 1103.27 667 659 181.3
C 12 2 197175 1084.2 667 659 181.3
D 12 110 653302 3487.89 665 635 187.1
D 2 31 126119 670.59 665 635 187.1
D 3 12 108885 578.49 665 635 187.1

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