ASTROSAT CZTI

Data Quality Report

Orbit 20180427_A04_026T04_9000002060_level2

Creation date: 2025-11-22T02:04:32.660577
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_026T04_9000002060cztM0_level2.fits modeM0/AS1A04_026T04_9000002060cztM0_level2_quad_clean.evt
Size (bytes)212,040,000257,270,400
Size202.2 MB 245.4 MB
Events in quadrant A1,276,9301,623,875
Events in quadrant B1,226,4721,605,489
Events in quadrant C1,264,0321,574,395
Events in quadrant D1,064,3781,398,308

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0360
B0360
C0360
D0360

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04720
B04720
C04720
D04720

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0478520
B0515670
C0477560
D0740500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A230892190.948504%
B230893181.377279%
C230891710.740612%
D2308911765.093334%

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 26709 23087 0 0 0.00% 0.00%
B 26708 23085 0 0 0.00% 0.00%
C 26708 23084 0 0 0.00% 0.00%
D 26709 23082 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 1229 10.84 333 313 84.5
A 7 110 1065 8.9 333 313 84.5
A 0 30 943 7.46 333 313 84.5
B 2 9 1091 12.05 323 309 64.9
B 3 17 842 8.21 323 309 64.9
B 5 255 810 7.72 323 309 64.9
C 12 241 964 7.54 333 311 86.6
C 2 191 870 6.45 333 311 86.6
C 9 242 828 5.97 333 311 86.6
D 6 231 799 6.35 304 276 82.4
D 3 14 785 6.18 304 276 82.4
D 7 3 755 5.81 304 276 82.4

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