ASTROSAT CZTI

Data Quality Report

Orbit 20170912_T01_191T01_9000001536_level2

Creation date: 2025-11-17T03:48:06.242324
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_191T01_9000001536cztM0_level2.fits modeM0/AS1T01_191T01_9000001536cztM0_level2_quad_clean.evt
Size (bytes)3,409,629,1203,872,698,560
Size3.2 GB 3.6 GB
Events in quadrant A20,652,21424,381,462
Events in quadrant B19,482,96023,068,986
Events in quadrant C20,382,18623,493,533
Events in quadrant D17,427,68621,053,492

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A075140
B075180
C075160
D075220

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05560
B05560
C05560
D05560

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07915800
B010102310
C08045760
D09737820

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A36941461491.664528%
B369431259177.015383%
C36946864761.752790%
D36943598012.652970%

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 425403 369221 0 0 0.00% 0.00%
B 425403 369446 0 0 0.00% 0.00%
C 425403 369407 0 0 0.00% 0.00%
D 425402 369282 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 14 188 21491 12.36 5359 5020 1332.5
A 0 29 20236 11.42 5359 5020 1332.5
A 14 204 17837 9.62 5359 5020 1332.5
B 2 9 16972 12.01 5145 4913 1004.2
B 12 226 13638 8.69 5145 4913 1004.2
B 14 254 12859 7.91 5145 4913 1004.2
C 1 81 16683 8.44 5374 4994 1385.6
C 1 80 16623 8.39 5374 4994 1385.6
C 12 250 15356 7.48 5374 4994 1385.6
D 4 246 14539 7.53 4969 4518 1331.6
D 3 14 12678 6.13 4969 4518 1331.6
D 6 231 12580 6.05 4969 4518 1331.6

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