ASTROSAT CZTI

Data Quality Report

Orbit 55827

Creation date: 2026-01-22T14:01:55.898750
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_55827cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55827cztM0_level2_quad_clean.evt
Size (bytes)522,483,840111,335,040
Size498.3 MB 106.2 MB
Events in quadrant A6,633,642672,089
Events in quadrant B3,570,354770,310
Events in quadrant C3,477,442714,029
Events in quadrant D5,041,696662,951

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0252683
B0168573
C0168083
D0207053

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01640
B01640
C01640
D01640

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A794088811.183879%
B79403504.408060%
C79411692.128195%
D79413544.457877%

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 9111 7943 592 592 6.50% 7.45%
B 9111 7943 2 2 0.02% 0.03%
C 9112 7946 11 11 0.12% 0.14%
D 9112 7946 158 158 1.73% 1.99%

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 12 115 2186937 10626.39 834 811 205.7
A 4 249 385796 1871.35 834 811 205.7
A 8 192 239256 1159.04 834 811 205.7
B 0 213 101355 539.25 858 825 186.4
B 0 171 26600 138.26 858 825 186.4
B 12 111 22706 117.37 858 825 186.4
C 14 254 57101 239.37 854 848 235.0
C 6 223 34917 144.97 854 848 235.0
C 7 220 13722 54.78 854 848 235.0
D 11 129 974487 4111.54 841 804 236.8
D 7 96 316047 1331.17 841 804 236.8
D 3 12 124746 523.37 841 804 236.8

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