ASTROSAT CZTI

Data Quality Report

Orbit 54256

Creation date: 2025-10-09T16:59:39.689746
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/AS1C09_004T08_9000006514_54256cztM0_level2.fits modeM0/AS1C09_004T08_9000006514_54256cztM0_level2_quad_clean.evt
Size (bytes)722,715,84077,258,880
Size689.2 MB 73.7 MB
Events in quadrant A5,422,630533,343
Events in quadrant B3,335,415658,052
Events in quadrant C4,835,448530,022
Events in quadrant D12,678,195185,170

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0204931
B0141351
C0188121
D0419551

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A619595515.415658%
B6196911.468689%
C61965048.134280%
D6196415467.043254%

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 7195 6195 740 740 10.28% 11.95%
B 7196 6197 9 9 0.13% 0.15%
C 7196 6197 394 394 5.48% 6.36%
D 7195 6195 3848 3848 53.48% 62.11%

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 29 1407576 9262.28 610 594 151.9
A 12 17 1141301 7509.37 610 594 151.9
A 15 174 175631 1152.28 610 594 151.9
B 7 0 360127 2590.67 652 629 138.8
B 0 213 111559 799.4 652 629 138.8
B 8 234 68362 488.11 652 629 138.8
C 1 29 1541509 9051.87 613 605 170.2
C 15 198 302399 1772.86 613 605 170.2
C 12 249 144510 845.35 613 605 170.2
D 8 176 10780078 110189.53 333 318 97.8
D 12 2 196069 2000.95 333 318 97.8
D 12 3 82408 839.12 333 318 97.8

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