ASTROSAT CZTI

Data Quality Report

Orbit 35782

Creation date: 2022-05-11T20:06:30.156077
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/AS1A09_121T01_9000005136_35782cztM0_level2.evt modeM0/AS1A09_121T01_9000005136_35782cztM0_level2_quad_clean.evt
Size (bytes)3,247,623,360577,356,480
Size3.0 GB 550.6 MB
Events in quadrant A20,589,9483,758,532
Events in quadrant B24,419,2863,751,221
Events in quadrant C23,291,5563,687,313
Events in quadrant D27,352,2583,536,015

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01410
B01410
C01410
D01410

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08593210
B0980419
C0924419
D01071299

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08220
B08220
C08220
D08220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A401183440.857470%
B401189232.300713%
C401187621.899397%
D4011814073.507154%

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 54303 40127 239 239 0.44% 0.60%
B 54303 40127 651 651 1.20% 1.62%
C 54303 40127 617 617 1.14% 1.54%
D 54303 40127 1333 1333 2.45% 3.32%

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 10 83 1010277 1053.8 4777 4689 954.3
A 15 237 860554 896.9 4777 4689 954.3
A 7 48 167761 170.89 4777 4689 954.3
B 5 172 2285331 2572.56 4701 4583 886.6
B 5 255 951215 1067.75 4701 4583 886.6
B 0 213 585266 654.98 4701 4583 886.6
C 15 214 1695423 1606.56 4593 4628 1052.4
C 1 23 1410317 1335.66 4593 4628 1052.4
C 0 10 1101322 1042.06 4593 4628 1052.4
D 14 52 1634514 1452.14 4617 4497 1122.5
D 10 118 1512131 1343.11 4617 4497 1122.5
D 13 249 1490385 1323.74 4617 4497 1122.5

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