ASTROSAT CZTI

Data Quality Report

Orbit 20180619_A04_203T01_9000002180_level2

Creation date: 2025-11-23T01:33:38.788411
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/AS1A04_203T01_9000002180cztM0_level2.fits modeM0/AS1A04_203T01_9000002180cztM0_level2_quad_clean.evt
Size (bytes)805,812,480704,162,880
Size768.5 MB 671.5 MB
Events in quadrant A4,493,0443,520,523
Events in quadrant B4,807,3624,227,748
Events in quadrant C4,907,8603,997,272
Events in quadrant D4,390,3303,784,208

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04084950
B01934240
C02028890
D01780000

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A017200
B017200
C017200
D017200

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01210
B01210
C01210
D01210

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A845172368528.023948%
B8451725943.069205%
C8451713901.644640%
D845178501.005715%

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 96642 84497 0 0 0.00% 0.00%
B 96642 84494 0 0 0.00% 0.00%
C 96642 84495 0 0 0.00% 0.00%
D 96642 84503 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 4314 11.09 1170 1096 290.0
A 7 110 3677 8.9 1170 1096 290.0
A 9 19 3297 7.59 1170 1096 290.0
B 2 9 4195 11.92 1269 1210 250.4
B 3 17 3205 7.97 1269 1210 250.4
B 3 80 3183 7.88 1269 1210 250.4
C 3 126 3332 6.43 1296 1204 330.8
C 12 241 3311 6.37 1296 1204 330.8
C 2 191 3275 6.26 1296 1204 330.8
D 3 14 3231 6.2 1254 1140 337.0
D 6 231 3153 5.97 1254 1140 337.0
D 10 189 3110 5.85 1254 1140 337.0

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