ASTROSAT CZTI

Data Quality Report

Orbit 58425

Creation date: 2026-07-16T07:14:24.633954
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_045T01_9000006590_58425cztM0_level2.fits modeM0/AS1A14_045T01_9000006590_58425cztM0_level2_quad_clean.evt
Size (bytes)422,055,360102,202,560
Size402.5 MB 97.5 MB
Events in quadrant A3,358,338674,954
Events in quadrant B4,338,158719,218
Events in quadrant C3,567,679643,697
Events in quadrant D3,846,022596,991

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0144692
B0172582
C0151192
D0161032

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0230
C0230
D0230

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6597991.500682%
B65972413.653176%
C6596991.500910%
D65961382.092177%

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 7827 6598 55 55 0.70% 0.83%
B 7827 6598 155 155 1.98% 2.35%
C 7826 6597 56 56 0.72% 0.85%
D 7826 6597 113 113 1.44% 1.71%

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 7 112 294494 1591.15 753 737 184.6
A 10 251 43086 229.39 753 737 184.6
A 3 14 29876 157.83 753 737 184.6
B 5 172 607034 3794.28 743 713 159.8
B 4 201 274998 1716.44 743 713 159.8
B 4 171 187503 1168.91 743 713 159.8
C 6 223 147431 731.77 729 725 200.5
C 1 16 123664 613.22 729 725 200.5
C 12 252 118241 586.17 729 725 200.5
D 8 240 319314 1557.18 716 684 204.6
D 2 120 231976 1130.35 716 684 204.6
D 7 222 213797 1041.51 716 684 204.6

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