ASTROSAT CZTI

Data Quality Report

Orbit 20171001_A04_130T01_9000001572_level2

Creation date: 2025-11-17T10:51:25.589963
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/AS1A04_130T01_9000001572cztM0_level2.fits modeM0/AS1A04_130T01_9000001572cztM0_level2_quad_clean.evt
Size (bytes)312,082,560283,694,400
Size297.6 MB 270.6 MB
Events in quadrant A1,842,2681,608,208
Events in quadrant B1,772,4721,583,103
Events in quadrant C1,888,4261,597,845
Events in quadrant D1,532,6821,390,585

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0370
B0350
C0350
D0360

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07160
B07320
C07320
D07140

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0852990
B0969700
C0721290
D01021660

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A3492612433.558953%
B3508825807.352941%
C354271370.386711%
D3477127988.046936%

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 41679 36403 0 0 0.00% 0.00%
B 41681 36554 0 0 0.00% 0.00%
C 42163 36903 0 0 0.00% 0.00%
D 42159 36007 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 1739 10.51 480 446 123.0
A 7 110 1499 8.56 480 446 123.0
A 9 19 1420 7.92 480 446 123.0
B 2 9 1480 10.72 467 443 96.7
B 2 8 1201 7.83 467 443 96.7
B 14 254 1175 7.56 467 443 96.7
C 1 80 1403 7.13 498 460 132.3
C 12 241 1373 6.9 498 460 132.3
C 1 81 1327 6.55 498 460 132.3
D 3 14 1118 6.03 437 397 119.7
D 7 3 1109 5.95 437 397 119.7
D 6 231 1101 5.88 437 397 119.7

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