ASTROSAT CZTI

Data Quality Report

Orbit 20161223_G06_135T02_9000000918_level2

Creation date: 2025-11-08T21:48:47.809485
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/AS1G06_135T02_9000000918cztM0_level2.fits modeM0/AS1G06_135T02_9000000918cztM0_level2_quad_clean.evt
Size (bytes)228,127,680212,339,520
Size217.6 MB 202.5 MB
Events in quadrant A1,304,2561,177,609
Events in quadrant B1,345,6541,269,854
Events in quadrant C1,379,0401,218,641
Events in quadrant D1,056,898943,820

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05400
B05400
C05400
D05400

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0210
B0210
C0210
D0210

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0709610
B0558230
C0542770
D0882170

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A2645823969.055862%
B264584561.723486%
C264582050.774813%
D26458459717.374707%

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 28568 26154 0 0 0.00% 0.00%
B 28568 26457 0 0 0.00% 0.00%
C 28568 26458 0 0 0.00% 0.00%
D 28568 26290 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 1299 11.27 338 318 87.1
A 0 29 1259 10.81 338 318 87.1
A 14 204 1161 9.68 338 318 87.1
B 2 9 1168 11.1 355 337 74.9
B 12 226 987 8.68 355 337 74.9
B 5 128 939 8.04 355 337 74.9
C 1 80 1063 7.47 363 336 97.3
C 1 81 1024 7.07 363 336 97.3
C 12 241 997 6.79 363 336 97.3
D 7 5 822 6.55 302 274 83.6
D 3 14 814 6.46 302 274 83.6
D 6 231 806 6.36 302 274 83.6

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