ASTROSAT CZTI

Data Quality Report

Orbit 20211204_A11_065T01_9000004794_level2

Creation date: 2025-12-30T17:20:29.466281
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/AS1A11_065T01_9000004794cztM0_level2.fits modeM0/AS1A11_065T01_9000004794cztM0_level2_quad_clean.evt
Size (bytes)266,071,680199,860,480
Size253.7 MB 190.6 MB
Events in quadrant A1,724,5541,181,551
Events in quadrant B1,564,6141,085,831
Events in quadrant C1,639,8221,093,714
Events in quadrant D1,163,310728,013

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05820
B05820
C05820
D05820

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0582200
B0807190
C0618190
D01329620

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01140
B01140
C01140
D01140

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A28536310.108635%
B2853622617.923325%
C285362560.897112%
D28536721725.290861%

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 39923 28536 0 0 0.00% 0.00%
B 39923 28529 0 0 0.00% 0.00%
C 39923 28533 0 0 0.00% 0.00%
D 39923 27102 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 0 29 1422 8.87 449 423 112.6
A 9 19 1390 8.59 449 423 112.6
A 7 110 1381 8.51 449 423 112.6
B 2 9 1319 11.0 415 398 83.7
B 3 80 1237 10.02 415 398 83.7
B 2 8 1130 8.74 415 398 83.7
C 1 81 1420 9.22 434 410 109.4
C 1 80 1347 8.56 434 410 109.4
C 3 187 1129 6.57 434 410 109.4
D 7 3 903 6.62 333 304 90.4
D 6 38 881 6.38 333 304 90.4
D 10 189 878 6.35 333 304 90.4

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