ASTROSAT CZTI

Data Quality Report

Orbit 20151128_P01_165T08_9000000182_level2

Creation date: 2025-10-24T17:59:55.251121
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/AS1P01_165T08_9000000182cztM0_level2.fits modeM0/AS1P01_165T08_9000000182cztM0_level2_quad_clean.evt
Size (bytes)181,212,480262,189,440
Size172.8 MB 250.0 MB
Events in quadrant A1,055,5121,741,348
Events in quadrant B962,7621,536,109
Events in quadrant C1,025,2421,615,373
Events in quadrant D888,2741,492,786

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0949820
B01243890
C0988440
D0920360

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04580
B04580
C04580
D04580

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0300
B0300
C0300
D0300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A22599780.345148%
B22599270711.978406%
C22599670.296473%
D22599990.438072%

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 25519 22599 0 0 0.00% 0.00%
B 25519 22475 0 0 0.00% 0.00%
C 25519 22598 0 0 0.00% 0.00%
D 25519 22599 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 1018 11.81 272 255 64.6
A 7 110 961 10.92 272 255 64.6
A 0 30 770 7.97 272 255 64.6
B 2 9 813 11.66 254 241 49.0
B 5 128 654 8.42 254 241 49.0
B 14 254 649 8.32 254 241 49.0
C 12 241 715 6.76 271 249 69.0
C 2 191 697 6.5 271 249 69.0
C 9 242 659 5.94 271 249 69.0
D 11 82 634 6.5 254 233 61.7
D 1 3 632 6.47 254 233 61.7
D 6 44 632 6.47 254 233 61.7

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