ASTROSAT CZTI

Data Quality Report

Orbit 20160914_T01_136T01_9000000662_level2

Creation date: 2025-11-06T12:50:30.863520
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/AS1T01_136T01_9000000662cztM0_level2.fits modeM0/AS1T01_136T01_9000000662cztM0_level2_quad_clean.evt
Size (bytes)297,501,120252,527,040
Size283.7 MB 240.8 MB
Events in quadrant A1,787,9521,420,468
Events in quadrant B1,743,3261,439,542
Events in quadrant C1,791,0801,378,995
Events in quadrant D1,490,8061,212,140

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0590
B0590
C0590
D0590

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06460
B06500
C06520
D06480

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0658710
B0665670
C0671130
D0818860

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A319545841.827627%
B319585861.833657%
C319664641.451542%
D3194127778.694155%

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 37884 32057 0 0 0.00% 0.00%
B 37884 32052 0 0 0.00% 0.00%
C 37884 32055 0 0 0.00% 0.00%
D 37884 32037 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 1745 10.79 464 431 121.7
A 7 110 1567 9.33 464 431 121.7
A 0 30 1401 7.97 464 431 121.7
B 2 9 1511 11.34 459 436 94.8
B 5 128 1196 8.02 459 436 94.8
B 3 17 1194 7.99 459 436 94.8
C 1 81 1291 6.84 472 438 124.7
C 1 80 1277 6.73 472 438 124.7
C 9 188 1261 6.6 472 438 124.7
D 11 82 1120 6.58 423 385 111.7
D 6 231 1113 6.52 423 385 111.7
D 7 5 1090 6.31 423 385 111.7

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