ASTROSAT CZTI

Data Quality Report

Orbit 20220107_A11_068T02_9000004850_level2

Creation date: 2025-12-31T07:36:09.532449
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/AS1A11_068T02_9000004850cztM0_level2.fits modeM0/AS1A11_068T02_9000004850cztM0_level2_quad_clean.evt
Size (bytes)237,162,240254,148,480
Size226.2 MB 242.4 MB
Events in quadrant A1,489,5061,613,288
Events in quadrant B1,375,3841,577,124
Events in quadrant C1,415,9121,503,733
Events in quadrant D1,201,1241,302,904

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01000
B01000
C01000
D01000

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05040
B05040
C05040
D05040

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0501260
B0611380
C0718970
D0816810

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A24705240.097146%
B2470510574.278486%
C247057242.930581%
D2470520248.192674%

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 33039 24705 0 0 0.00% 0.00%
B 33038 24699 0 0 0.00% 0.00%
C 33037 24701 0 0 0.00% 0.00%
D 33038 24684 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 9 19 1288 9.45 388 366 97.5
A 0 29 1248 9.04 388 366 97.5
A 7 110 1179 8.33 388 366 97.5
B 2 9 1180 11.15 364 346 74.8
B 3 80 1073 9.72 364 346 74.8
B 2 8 1010 8.88 364 346 74.8
C 1 81 1223 8.93 374 351 97.7
C 1 80 1214 8.83 374 351 97.7
C 3 202 1109 7.76 374 351 97.7
D 10 189 886 6.19 344 315 92.2
D 6 62 871 6.03 344 315 92.2
D 6 231 862 5.93 344 315 92.2

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