ASTROSAT CZTI

Data Quality Report

Orbit 20170406_T01_164T01_9000001140_level2

Creation date: 2025-11-10T12:45:54.711673
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/AS1T01_164T01_9000001140cztM0_level2.fits modeM0/AS1T01_164T01_9000001140cztM0_level2_quad_clean.evt
Size (bytes)172,143,360189,434,880
Size164.2 MB 180.7 MB
Events in quadrant A1,031,2161,162,481
Events in quadrant B1,001,4321,167,694
Events in quadrant C1,026,2281,122,756
Events in quadrant D888,7141,018,038

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0390550
B0411180
C0379920
D0413930

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03740
B03740
C03740
D03740

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0260
B0260
C0260
D0260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A183763281.784937%
B183754352.367347%
C183761390.756421%
D183683191.736716%

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 20917 18378 0 0 0.00% 0.00%
B 20917 18389 0 0 0.00% 0.00%
C 20917 18388 0 0 0.00% 0.00%
D 20917 18387 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 1066 11.88 267 250 68.7
A 0 29 1005 11.0 267 250 68.7
A 14 204 907 9.57 267 250 68.7
B 2 9 834 10.53 263 250 55.5
B 3 17 716 8.4 263 250 55.5
B 5 225 676 7.68 263 250 55.5
C 1 80 833 8.09 270 250 72.1
C 1 81 807 7.73 270 250 72.1
C 12 250 766 7.16 270 250 72.1
D 3 31 672 6.3 253 229 70.3
D 3 14 672 6.3 253 229 70.3
D 11 82 643 5.89 253 229 70.3

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