ASTROSAT CZTI

Data Quality Report

Orbit 20180403_G08_028T01_9000002006_level2

Creation date: 2025-11-20T13:38:26.249808
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/AS1G08_028T01_9000002006cztM0_level2.fits modeM0/AS1G08_028T01_9000002006cztM0_level2_quad_clean.evt
Size (bytes)256,976,640281,908,800
Size245.1 MB 268.8 MB
Events in quadrant A1,584,3021,784,738
Events in quadrant B1,493,3561,742,063
Events in quadrant C1,548,6341,703,241
Events in quadrant D1,227,0581,380,404

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0380
B0380
C0380
D0380

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05700
B05700
C05700
D05700

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0578540
B0677190
C0582350
D01056290

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A280281510.538747%
B280288132.900671%
C280281470.524476%
D28028490017.482517%

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 31798 28026 0 0 0.00% 0.00%
B 31798 28026 0 0 0.00% 0.00%
C 31798 28026 0 0 0.00% 0.00%
D 31798 27992 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 1639 11.79 411 384 106.5
A 0 29 1591 11.34 411 384 106.5
A 14 204 1393 9.48 411 384 106.5
B 2 9 1335 11.76 394 374 81.7
B 2 8 1018 7.88 394 374 81.7
B 3 17 1013 7.82 394 374 81.7
C 1 81 1202 7.59 409 380 108.4
C 1 80 1198 7.55 409 380 108.4
C 12 241 1070 6.37 409 380 108.4
D 3 14 913 6.24 349 318 95.3
D 6 231 885 5.95 349 318 95.3
D 6 38 864 5.73 349 318 95.3

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