ASTROSAT CZTI

Data Quality Report

Orbit 20211224_A11_037T01_9000004818_level2

Creation date: 2025-12-30T23:33:32.561482
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_037T01_9000004818cztM0_level2.fits modeM0/AS1A11_037T01_9000004818cztM0_level2_quad_clean.evt
Size (bytes)223,274,880250,882,560
Size212.9 MB 239.3 MB
Events in quadrant A1,347,8701,558,228
Events in quadrant B1,260,6881,519,021
Events in quadrant C1,341,9161,514,052
Events in quadrant D1,129,7441,326,233

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0710
B0710
C0710
D0710

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0612040
B0698340
C0552450
D0836450

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05000
B05000
C05000
D05000

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A244157292.985869%
B2441517887.323367%
C244153101.269711%
D2441514025.742371%

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 31579 24411 0 0 0.00% 0.00%
B 31579 24379 0 0 0.00% 0.00%
C 31579 24402 0 0 0.00% 0.00%
D 31579 24397 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 1157 9.47 351 332 87.1
A 7 110 1097 8.78 351 332 87.1
A 9 19 1071 8.48 351 332 87.1
B 2 9 1178 12.94 334 320 66.3
B 3 80 983 10.0 334 320 66.3
B 2 8 931 9.22 334 320 66.3
C 1 81 1111 8.62 354 333 90.2
C 1 80 1081 8.29 354 333 90.2
C 3 203 1036 7.79 354 333 90.2
D 10 189 859 6.49 323 294 87.1
D 10 113 837 6.23 323 294 87.1
D 4 160 834 6.2 323 294 87.1

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