ASTROSAT CZTI

Data Quality Report

Orbit 20180227_A04_176T02_9000001924_level2

Creation date: 2025-11-19T18:39:26.030515
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/AS1A04_176T02_9000001924cztM0_level2.fits modeM0/AS1A04_176T02_9000001924cztM0_level2_quad_clean.evt
Size (bytes)310,155,840262,846,080
Size295.8 MB 250.7 MB
Events in quadrant A2,015,0241,666,380
Events in quadrant B1,606,0521,341,634
Events in quadrant C2,002,1361,596,977
Events in quadrant D1,318,790914,009

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0480
B0480
C0480
D0480

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0776400
B01329360
C0735450
D01802090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07240
B07240
C07240
D07240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A355158032.261016%
B35517940726.485908%
C355174021.131852%
D355151448240.777136%

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 40372 35504 0 0 0.00% 0.00%
B 40372 34096 0 0 0.00% 0.00%
C 40372 35517 0 0 0.00% 0.00%
D 40372 35428 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 1928 10.97 524 491 131.0
A 7 110 1661 8.93 524 491 131.0
A 9 19 1513 7.8 524 491 131.0
B 2 9 1341 10.86 424 403 86.4
B 14 254 1130 8.41 424 403 86.4
B 5 128 1077 7.8 424 403 86.4
C 12 241 1372 6.38 529 490 138.1
C 9 188 1359 6.29 529 490 138.1
C 7 111 1332 6.1 529 490 138.1
D 10 189 938 5.93 376 344 100.2
D 6 231 932 5.87 376 344 100.2
D 4 160 908 5.63 376 344 100.2

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