ASTROSAT CZTI

Data Quality Report

Orbit 55873

Creation date: 2026-01-25T17:19:46.797665
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_030T02_9000006544_55873cztM0_level2.fits modeM0/AS1A14_030T02_9000006544_55873cztM0_level2_quad_clean.evt
Size (bytes)512,280,000112,178,880
Size488.5 MB 107.0 MB
Events in quadrant A3,982,969726,498
Events in quadrant B3,604,691787,584
Events in quadrant C5,064,859674,762
Events in quadrant D5,684,457647,920

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01600
B01600
C01600
D01600

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0176780
B0167640
C0210220
D0224390

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8058530.657731%
B8058490.608091%
C80584595.696203%
D80582873.561678%

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 8058 8058 50 50 0.62% 0.62%
B 8058 8058 32 32 0.40% 0.40%
C 8058 8057 309 309 3.83% 3.84%
D 8058 8058 281 281 3.49% 3.49%

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 4 249 418138 2046.5 824 803 203.9
A 8 192 97025 471.85 824 803 203.9
A 4 78 66906 324.15 824 803 203.9
B 4 21 126208 712.3 818 788 176.1
B 5 172 125136 706.21 818 788 176.1
B 5 185 57643 322.9 818 788 176.1
C 15 199 555732 2568.03 787 780 216.1
C 15 218 514695 2378.14 787 780 216.1
C 12 254 223707 1031.59 787 780 216.1
D 2 62 927472 4134.92 789 756 224.1
D 15 125 733458 3269.25 789 756 224.1
D 8 245 334011 1486.95 789 756 224.1

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