ASTROSAT CZTI

Data Quality Report

Orbit 20161121_A02_046T01_9000000814_level2

Creation date: 2025-11-07T21:18:17.089075
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/AS1A02_046T01_9000000814cztM0_level2.fits modeM0/AS1A02_046T01_9000000814cztM0_level2_quad_clean.evt
Size (bytes)243,881,280289,333,440
Size232.6 MB 275.9 MB
Events in quadrant A1,465,9511,817,232
Events in quadrant B1,425,3881,807,560
Events in quadrant C1,470,3011,753,369
Events in quadrant D1,270,3421,631,128

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0530
B0490
C0510
D0500

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0600610
B0542570
C0520090
D0565750

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05240
B05280
C05260
D05280

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A254535122.011551%
B254613961.555320%
C254592540.997683%
D254623431.347105%

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 32677 25878 0 0 0.00% 0.00%
B 32677 25883 0 0 0.00% 0.00%
C 32677 25903 0 0 0.00% 0.00%
D 32677 25886 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 1442 11.27 381 359 96.1
A 7 110 1294 9.73 381 359 96.1
A 9 19 1106 7.77 381 359 96.1
B 2 9 1190 10.93 376 361 75.9
B 5 128 983 8.2 376 361 75.9
B 12 226 966 7.98 376 361 75.9
C 1 81 1125 7.42 388 362 102.9
C 1 80 1110 7.27 388 362 102.9
C 1 65 1040 6.59 388 362 102.9
D 3 14 1015 7.06 362 331 96.9
D 11 82 1008 6.99 362 331 96.9
D 6 231 943 6.31 362 331 96.9

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