ASTROSAT CZTI

Data Quality Report

Orbit 20170223_A02_178T01_9000001048_level2

Creation date: 2025-11-09T18:17:59.018108
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/AS1A02_178T01_9000001048cztM0_level2.fits modeM0/AS1A02_178T01_9000001048cztM0_level2_quad_clean.evt
Size (bytes)822,916,800736,557,120
Size784.8 MB 702.4 MB
Events in quadrant A5,058,2824,334,625
Events in quadrant B4,867,4044,345,601
Events in quadrant C4,834,8743,965,147
Events in quadrant D4,276,0603,777,462

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01905430
B01820900
C02456510
D01981930

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A017500
B017500
C017500
D017500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8582011971.394780%
B8582112791.490311%
C8581744525.187783%
D8582017252.010021%

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 100328 85818 0 0 0.00% 0.00%
B 100328 85818 0 0 0.00% 0.00%
C 100328 85814 0 0 0.00% 0.00%
D 100328 85801 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 4808 10.96 1312 1226 326.9
A 7 110 4097 8.78 1312 1226 326.9
A 9 19 3800 7.87 1312 1226 326.9
B 2 9 4128 11.56 1281 1219 251.7
B 12 226 3359 8.5 1281 1219 251.7
B 14 254 3297 8.26 1281 1219 251.7
C 1 80 3515 6.94 1277 1182 336.3
C 1 81 3502 6.9 1277 1182 336.3
C 12 241 3350 6.45 1277 1182 336.3
D 6 231 3212 6.45 1222 1110 325.7
D 7 5 3024 5.88 1222 1110 325.7
D 7 3 3011 5.84 1222 1110 325.7

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