ASTROSAT CZTI

Data Quality Report

Orbit 20151127_P01_161T05_9000000180_level2

Creation date: 2025-10-24T17:42:05.345020
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/AS1P01_161T05_9000000180cztM0_level2.fits modeM0/AS1P01_161T05_9000000180cztM0_level2_quad_clean.evt
Size (bytes)351,878,400352,990,080
Size335.6 MB 336.6 MB
Events in quadrant A2,071,0262,120,683
Events in quadrant B1,891,7841,839,921
Events in quadrant C2,030,3882,033,845
Events in quadrant D1,725,8301,760,524

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0450
B0450
C0450
D0450

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08700
B08700
C08700
D08700

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01832060
B02387230
C01981030
D01869740

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A427361900.444590%
B42736544812.748034%
C427362660.622426%
D4273616993.975571%

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 47326 42736 0 0 0.00% 0.00%
B 47326 42348 0 0 0.00% 0.00%
C 47326 42736 0 0 0.00% 0.00%
D 47325 42686 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 1917 11.15 535 499 127.2
A 7 110 1865 10.74 535 499 127.2
A 14 188 1527 8.08 535 499 127.2
B 2 9 1526 11.17 500 474 94.2
B 5 128 1259 8.34 500 474 94.2
B 14 254 1230 8.03 500 474 94.2
C 2 191 1406 6.88 536 495 132.5
C 12 241 1402 6.85 536 495 132.5
C 9 242 1311 6.16 536 495 132.5
D 6 44 1272 6.89 494 452 119.1
D 11 82 1244 6.65 494 452 119.1
D 3 30 1244 6.65 494 452 119.1

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