ASTROSAT CZTI

Data Quality Report

Orbit 20210201_A10_064T02_9000004146_level2

Creation date: 2025-12-20T05:40:59.175120
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/AS1A10_064T02_9000004146cztM0_level2.fits modeM0/AS1A10_064T02_9000004146cztM0_level2_quad_clean.evt
Size (bytes)335,664,000329,837,760
Size320.1 MB 314.6 MB
Events in quadrant A2,102,0262,070,165
Events in quadrant B2,041,4722,091,745
Events in quadrant C1,973,1101,904,623
Events in quadrant D1,537,6741,417,556

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0410
B0410
C0410
D0410

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0758260
B0757510
C01279690
D01651540

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07440
B07440
C07440
D07440

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A364705111.401152%
B364705981.639704%
C3646933649.224273%
D364691153031.615893%

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 40550 36470 0 0 0.00% 0.00%
B 40550 36465 0 0 0.00% 0.00%
C 40549 36468 0 0 0.00% 0.00%
D 40550 36414 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 1945 10.39 548 512 138.0
A 7 110 1769 9.11 548 512 138.0
A 9 19 1645 8.21 548 512 138.0
B 2 9 1622 10.23 538 512 108.5
B 14 254 1408 8.26 538 512 108.5
B 2 8 1396 8.15 538 512 108.5
C 12 241 1413 6.9 521 485 134.6
C 2 191 1343 6.38 521 485 134.6
C 3 158 1317 6.18 521 485 134.6
D 10 189 1111 6.05 438 399 117.7
D 15 46 1110 6.04 438 399 117.7
D 3 14 1103 5.98 438 399 117.7

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