ASTROSAT CZTI

Data Quality Report

Orbit 20170418_A02_158T01_9000001184_level2

Creation date: 2025-11-11T22:03:12.855215
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_158T01_9000001184cztM0_level2.fits modeM0/AS1A02_158T01_9000001184cztM0_level2_quad_clean.evt
Size (bytes)301,230,720292,639,680
Size287.3 MB 279.1 MB
Events in quadrant A1,801,4581,715,901
Events in quadrant B1,735,4781,729,219
Events in quadrant C1,784,4721,650,584
Events in quadrant D1,534,7181,500,100

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06720
B06720
C06720
D06720

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0270
B0270
C0270
D0270

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0683800
B0701640
C0678570
D0768230

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A329804761.443299%
B329755011.519333%
C329792420.733800%
D329756982.116755%

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 35858 33004 0 0 0.00% 0.00%
B 35858 33005 0 0 0.00% 0.00%
C 35858 33007 0 0 0.00% 0.00%
D 35858 33004 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 1804 11.48 467 434 119.3
A 0 29 1780 11.28 467 434 119.3
A 14 204 1561 9.44 467 434 119.3
B 2 9 1547 11.67 458 434 95.4
B 14 254 1220 8.24 458 434 95.4
B 5 232 1216 8.2 458 434 95.4
C 1 81 1324 7.02 471 435 126.5
C 1 80 1324 7.02 471 435 126.5
C 12 241 1285 6.71 471 435 126.5
D 6 231 1157 6.35 437 395 120.0
D 7 5 1115 6.0 437 395 120.0
D 3 31 1099 5.87 437 395 120.0

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