ASTROSAT CZTI

Data Quality Report

Orbit 20181106_A05_140T01_9000002496_level2

Creation date: 2025-11-25T17:56:46.398928
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/AS1A05_140T01_9000002496cztM0_level2.fits modeM0/AS1A05_140T01_9000002496cztM0_level2_quad_clean.evt
Size (bytes)776,554,560696,905,280
Size740.6 MB 664.6 MB
Events in quadrant A4,769,9584,048,865
Events in quadrant B4,587,9844,171,012
Events in quadrant C4,681,2763,954,564
Events in quadrant D3,957,4603,414,052

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A016360
B016360
C016360
D016360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02005040
B01862080
C01848580
D02532210

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01250
B01250
C01250
D01250

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8046738924.836765%
B8046717002.112667%
C8046719342.403470%
D8046773899.182646%

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 92858 80457 0 0 0.00% 0.00%
B 92858 80465 0 0 0.00% 0.00%
C 92858 80468 0 0 0.00% 0.00%
D 92858 80328 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 4573 11.13 1241 1163 306.4
A 7 110 3749 8.44 1241 1163 306.4
A 9 19 3608 7.98 1241 1163 306.4
B 2 9 3754 10.86 1215 1160 238.8
B 2 8 3104 8.14 1215 1160 238.8
B 3 17 3090 8.08 1215 1160 238.8
C 1 81 3570 7.63 1236 1152 316.9
C 1 80 3559 7.59 1236 1152 316.9
C 2 191 3215 6.51 1236 1152 316.9
D 3 14 2819 5.95 1129 1027 301.1
D 6 231 2812 5.93 1129 1027 301.1
D 6 67 2761 5.76 1129 1027 301.1

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