ASTROSAT CZTI

Data Quality Report

Orbit 56377

Creation date: 2026-02-28T12:57:32.179681
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_083T05_9000006554_56377cztM0_level2.fits modeM0/AS1A14_083T05_9000006554_56377cztM0_level2_quad_clean.evt
Size (bytes)569,880,00092,240,640
Size543.5 MB 88.0 MB
Events in quadrant A7,118,923520,656
Events in quadrant B3,821,216675,647
Events in quadrant C5,586,682572,458
Events in quadrant D4,058,552566,103

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0220
C0220
D0220

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0255613
B0158832
C0211372
D0166812

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6565143321.827875%
B65664016.107219%
C656671810.935120%
D65662193.335364%

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 8824 6565 1342 1342 15.21% 20.44%
B 8825 6567 202 202 2.29% 3.08%
C 8825 6566 591 591 6.70% 9.00%
D 8825 6567 131 131 1.48% 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 3 1656065 10037.11 665 647 164.9
A 3 14 1209760 7331.08 665 647 164.9
A 4 95 694560 4207.33 665 647 164.9
B 0 213 501432 3280.78 721 694 152.6
B 4 171 111021 722.85 721 694 152.6
B 1 255 100626 654.74 721 694 152.6
C 12 254 941435 5015.4 691 685 187.6
C 13 3 782007 4165.45 691 685 187.6
C 15 230 474751 2527.38 691 685 187.6
D 8 129 594038 2984.34 712 680 198.8
D 2 249 309725 1554.36 712 680 198.8
D 7 96 80837 403.16 712 680 198.8

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