ASTROSAT CZTI

Data Quality Report

Orbit 20250819_A14_004T04_9000006500_level2

Creation date: 2025-08-22T14:50:37.605838
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_004T04_9000006500cztM0_level2.fits modeM0/AS1A14_004T04_9000006500cztM0_level2_quad_clean.evt
Size (bytes)533,401,920152,487,360
Size508.7 MB 145.4 MB
Events in quadrant A3,288,262282
Events in quadrant B3,213,446404
Events in quadrant C2,114,784337
Events in quadrant D2,903,888333

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013620
B013620
C013620
D013620

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02454090
B01714070
C04077050
D01847710

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0770
B0770
C0770
D0770

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67233840912.507251%
B6723327584.102152%
C672323539052.638624%
D6723331684.711972%

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 74743 67182 0 0 0.00% 0.00%
B 74743 67214 0 0 0.00% 0.00%
C 74743 64792 0 0 0.00% 0.00%
D 74743 67194 0 0 0.00% 0.00%

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 14 188 3809 10.35 863 796 291.2
A 9 255 3307 8.62 863 796 291.2
A 14 204 3014 7.62 863 796 291.2
B 2 9 3601 13.93 850 802 200.9
B 2 8 3284 12.36 850 802 200.9
B 9 173 2578 8.84 850 802 200.9
C 2 31 1664 5.84 568 515 196.8
C 7 111 1588 5.45 568 515 196.8
C 6 179 1579 5.41 568 515 196.8
D 6 218 3658 10.39 830 733 281.4
D 15 11 2947 7.87 830 733 281.4
D 8 12 2684 6.93 830 733 281.4

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