ASTROSAT CZTI

Data Quality Report

Orbit 55778

Creation date: 2026-01-20T15:26:34.166657
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_099T04_9000006540_55778cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55778cztM0_level2_quad_clean.evt
Size (bytes)852,609,60082,028,160
Size813.1 MB 78.2 MB
Events in quadrant A11,707,608415,685
Events in quadrant B3,467,505694,981
Events in quadrant C3,477,769628,950
Events in quadrant D12,387,724275,397

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0394462
B0145002
C0153762
D0414023

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0130
C0130
D0130

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6719285842.536092%
B6719691.026939%
C6719650.967406%
D6718393358.544210%

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 7808 6718 2744 2744 35.14% 40.85%
B 7809 6719 23 23 0.29% 0.34%
C 7809 6719 47 47 0.60% 0.70%
D 7808 6718 3850 3850 49.31% 57.31%

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 6047959 40341.96 607 592 149.9
A 15 32 1991350 13280.34 607 592 149.9
A 12 115 796005 5306.19 607 592 149.9
B 5 172 479240 3170.95 707 681 150.9
B 2 249 85700 563.34 707 681 150.9
B 7 252 43146 281.37 707 681 150.9
C 9 38 394038 2042.97 705 701 192.5
C 10 22 151058 780.95 705 701 192.5
C 6 223 50412 258.2 705 701 192.5
D 11 129 9124867 64852.78 497 476 140.7
D 7 70 861713 6121.35 497 476 140.7
D 8 245 200342 1420.57 497 476 140.7

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