ASTROSAT CZTI

Data Quality Report

Orbit 55808

Creation date: 2026-01-21T06:18:12.657480
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_127T10_9000006542_55808cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55808cztM0_level2_quad_clean.evt
Size (bytes)459,169,92099,086,400
Size437.9 MB 94.5 MB
Events in quadrant A6,813,726617,556
Events in quadrant B3,221,683689,885
Events in quadrant C2,964,377628,719
Events in quadrant D3,474,092594,596

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0248952
B0149122
C0144033
D0154312

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0150
D0150

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67354696.963623%
B67351161.722346%
C6734260.386100%
D6734490.727651%

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 7880 6736 482 482 6.12% 7.16%
B 7880 6736 90 90 1.14% 1.34%
C 7879 6735 30 30 0.38% 0.45%
D 7879 6735 46 46 0.58% 0.68%

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 15 32 2878222 17187.04 666 649 167.4
A 12 115 521067 3108.33 666 649 167.4
A 8 192 221467 1318.89 666 649 167.4
B 0 153 278409 1912.15 674 653 145.3
B 0 213 102105 698.43 674 653 145.3
B 10 247 42617 288.89 674 653 145.3
C 13 3 273598 1458.9 671 665 187.1
C 7 220 36426 191.15 671 665 187.1
C 14 254 18831 97.1 671 665 187.1
D 11 129 379066 1971.17 666 638 192.0
D 3 12 206130 1070.37 666 638 192.0
D 7 96 143525 744.27 666 638 192.0

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